Update README.md

update readme file

.gitignore

@@ -13,8 +13,7 @@ venv
 
 # Ignore Log files ss
 logs/
-
-# Ignore db folders
-instance/
+*.log
+
 
 

README.md

@@ -36,7 +36,8 @@ The Comparison Project is designed to:
 
 ## Tech Stack
 
-**Backend Framework**: Flask  
+**Frontend Framework**: HTML, CSS, Js, Bootstrap  
+**Backend Framework**: Python Flask  
 **Database**: SQL Database (MySQL/PostgreSQL/SQLite configured via environment variables)  
 **ORM**: SQLAlchemy  
 **File Processing**: Pandas, OpenPyXL, XlsxWriter  
@@ -580,4 +581,4 @@ Open browser: `http://127.0.0.1:5000/`
 
 For issues, feature requests, or contributions, please contact the development team.
 
-**Last Updated:** January 2026
+**Last Updated:** April 2026

app/__init__.py

@@ -1,6 +1,7 @@
 from flask import Flask, redirect, url_for
 from app.config import Config
 from app.services.db_service import db
+from app.services.logger_service import LoggerService
 
 def create_app():
     app = Flask(__name__)
@@ -9,6 +10,9 @@ def create_app():
     # Initialize extensions
     db.init_app(app)
 
+    # Initialize Logger
+    LoggerService.init_app(app)
+
     # Register blueprints
     register_blueprints(app)
     # Register error handlers
@@ -43,10 +47,15 @@ def register_blueprints(app):
 
 
 def register_error_handlers(app):
+
+    from flask import current_app
+
     @app.errorhandler(404)
     def page_not_found(e):
+        current_app.logger.warning("404 Page Not Found")
         return "Page Not Found", 404
 
     @app.errorhandler(500)
     def internal_error(e):
-        return "Internal Server Error", 500
+        current_app.logger.exception("500 Internal Server Error")
+        return "Internal Server Error", 500

app/constants/http_status.py

@@ -0,0 +1,11 @@
+class HTTPStatus:
+    OK = 200
+    CREATED = 201
+    BAD_REQUEST = 400
+    UNAUTHORIZED = 401
+    FORBIDDEN = 403
+    NOT_FOUND = 404
+    METHOD_NOT_ALLOWED = 405
+    CONFLICT = 409
+    UNPROCESSABLE_ENTITY = 422
+    INTERNAL_SERVER_ERROR = 500

app/constants/messages.py

@@ -0,0 +1,17 @@
+class SuccessMessage:
+    FETCHED = "Data fetched successfully"
+    CREATED = "Resource created successfully"
+    UPDATED = "Resource updated successfully"
+    DELETED = "Resource deleted successfully"
+    LOGIN = "Login successful"
+    LOGOUT = "Logout successful"
+
+
+class ErrorMessage:
+    INVALID_REQUEST = "Invalid request data"
+    UNAUTHORIZED = "Unauthorized access"
+    FORBIDDEN = "Access forbidden"
+    NOT_FOUND = "Resource not found"
+    VALIDATION_FAILED = "Validation failed"
+    INTERNAL_ERROR = "Internal server error"
+    DUPLICATE_ENTRY = "Duplicate record found"

app/errors/error_handlers.py

@@ -0,0 +1,66 @@
+from flask import request, render_template
+from app.utils.response_handler import ResponseHandler
+from app.utils.exceptions import APIException
+from app.constants.http_status import HTTPStatus
+from app.constants.messages import ErrorMessage
+from app.services.db_service import db
+import traceback
+
+
+def register_error_handlers(app):
+
+    # Custom API Exception
+    @app.errorhandler(APIException)
+    def handle_api_exception(e):
+        db.session.rollback()
+
+        if request.path.startswith("/api"):
+            return ResponseHandler.error(
+                message=e.message,
+                errors=e.errors,
+                status_code=e.status_code
+            )
+
+        return render_template("errors/500.html"), e.status_code
+
+
+    # 404
+    @app.errorhandler(404)
+    def handle_404(e):
+        if request.path.startswith("/api"):
+            return ResponseHandler.error(
+                message=ErrorMessage.NOT_FOUND,
+                status_code=HTTPStatus.NOT_FOUND
+            )
+
+        return render_template("errors/404.html"), 404
+
+
+    # 500
+    @app.errorhandler(500)
+    def handle_500(e):
+        db.session.rollback()
+        traceback.print_exc()
+
+        if request.path.startswith("/api"):
+            return ResponseHandler.error(
+                message=ErrorMessage.INTERNAL_ERROR,
+                status_code=HTTPStatus.INTERNAL_SERVER_ERROR
+            )
+
+        return render_template("errors/500.html"), 500
+
+
+    # Catch All
+    @app.errorhandler(Exception)
+    def handle_general_exception(e):
+        db.session.rollback()
+        traceback.print_exc()
+
+        if request.path.startswith("/api"):
+            return ResponseHandler.error(
+                message=ErrorMessage.INTERNAL_ERROR,
+                status_code=HTTPStatus.INTERNAL_SERVER_ERROR
+            )
+
+        return render_template("errors/500.html"), 500

app/models/laying_client_model.py

@@ -1,9 +1,7 @@
 from app import db
 from datetime import datetime
 from sqlalchemy import event
-import re
-# REGEX PATTERN
-PIPE_MM_PATTERN = re.compile(r"^pipe_\d+_mm$")
+from app.utils.regex_utils import RegularExpression
 
 class LayingClient(db.Model):
     __tablename__ = "laying_client"
@@ -13,33 +11,33 @@ class LayingClient(db.Model):
     # Basic Fields
     Location = db.Column(db.String(500))
     MH_NO = db.Column(db.String(100))
-    CC_length = db.Column(db.Float)
+    CC_length = db.Column(db.Float, default=0)
     # Bedding Qty.
-    Outer_dia_of_MH_m = db.Column(db.Float)
-    Bedding_Length = db.Column(db.Float)
-    Width = db.Column(db.Float)
-    Depth = db.Column(db.Float)
-    Qty = db.Column(db.Float)
+    Outer_dia_of_MH_m = db.Column(db.Float, default=0)
+    Bedding_Length = db.Column(db.Float, default=0)
+    Width = db.Column(db.Float, default=0)
+    Depth = db.Column(db.Float, default=0)
+    Qty = db.Column(db.Float, default=0)
  
     #  PIPE LAYING Qty. 
-    Pipe_Dia_mm = db.Column(db.Float)
-    ID_of_MH_m = db.Column(db.Float)
-    Laying_Length = db.Column(db.Float)
+    Pipe_Dia_mm = db.Column(db.Float, default=0)
+    ID_of_MH_m = db.Column(db.Float, default=0)
+    Laying_Length = db.Column(db.Float, default=0)
 
-    pipe_150_mm = db.Column(db.Float)
-    pipe_200_mm = db.Column(db.Float)
-    pipe_250_mm = db.Column(db.Float)
-    pipe_300_mm = db.Column(db.Float)
-    pipe_350_mm = db.Column(db.Float)
-    pipe_400_mm = db.Column(db.Float)
-    pipe_450_mm = db.Column(db.Float)
-    pipe_500_mm = db.Column(db.Float)
-    pipe_600_mm = db.Column(db.Float)
-    pipe_700_mm = db.Column(db.Float)
-    pipe_900_mm = db.Column(db.Float)
-    pipe_1200_mm = db.Column(db.Float)
+    pipe_150_mm = db.Column(db.Float, default=0)
+    pipe_200_mm = db.Column(db.Float, default=0)
+    pipe_250_mm = db.Column(db.Float, default=0)
+    pipe_300_mm = db.Column(db.Float, default=0)
+    pipe_350_mm = db.Column(db.Float, default=0)
+    pipe_400_mm = db.Column(db.Float, default=0)
+    pipe_450_mm = db.Column(db.Float, default=0)
+    pipe_500_mm = db.Column(db.Float, default=0)
+    pipe_600_mm = db.Column(db.Float, default=0)
+    pipe_700_mm = db.Column(db.Float, default=0)
+    pipe_900_mm = db.Column(db.Float, default=0)
+    pipe_1200_mm = db.Column(db.Float, default=0)
     
-    Total = db.Column(db.Float)
+    Total = db.Column(db.Float, default=0)
     Remarks = db.Column(db.String(500))
     RA_Bill_No=db.Column(db.String(500))
     
@@ -52,25 +50,13 @@ class LayingClient(db.Model):
     def serialize(self):
         return {c.name: getattr(self, c.name) for c in self.__table__.columns}
 
-    
-    def sum_laying_fields():
-        return [
-            "pipe_150_mm", "pipe_200_mm", "pipe_250_mm",
-            "pipe_300_mm", "pipe_350_mm", "pipe_400_mm",
-            "pipe_450_mm", "pipe_500_mm", "pipe_600_mm",
-            "pipe_700_mm", "pipe_900_mm", "pipe_1200_mm"
-        ]
-    
-# ===============================
+
 # AUTO TOTAL USING REGEX
-# ===============================
 def calculate_laying_total(mapper, connection, target):
     total = 0
-
     for column in target.__table__.columns:
-        if PIPE_MM_PATTERN.match(column.name):
+        if RegularExpression.PIPE_MM_PATTERN.match(column.name):
             total += getattr(target, column.name) or 0
-
     target.Total = total
 
 event.listen(LayingClient, "before_insert", calculate_laying_total)

app/models/laying_model.py

@@ -1,9 +1,7 @@
 from app import db
 from datetime import datetime
 from sqlalchemy import event
-import re
-# REGEX PATTERN
-PIPE_MM_PATTERN = re.compile(r"^pipe_\d+_mm$")
+from app.utils.regex_utils import RegularExpression
 
 class Laying(db.Model):
     __tablename__ = "laying"
@@ -17,25 +15,25 @@ class Laying(db.Model):
     # Pipe Laying Fields
     Location = db.Column(db.String(500))
     MH_NO = db.Column(db.String(100))
-    CC_length = db.Column(db.Float)
-    Pipe_Dia_mm = db.Column(db.Float)
-    ID_of_MH_m = db.Column(db.Float)
-    Laying_Length = db.Column(db.Float)
+    CC_length = db.Column(db.Float, default=0)
+    Pipe_Dia_mm = db.Column(db.Float, default=0)
+    ID_of_MH_m = db.Column(db.Float, default=0)
+    Laying_Length = db.Column(db.Float, default=0)
 
-    pipe_150_mm = db.Column(db.Float)
-    pipe_200_mm = db.Column(db.Float)
-    pipe_250_mm = db.Column(db.Float)
-    pipe_300_mm = db.Column(db.Float)
-    pipe_350_mm = db.Column(db.Float)
-    pipe_400_mm = db.Column(db.Float)
-    pipe_450_mm = db.Column(db.Float)
-    pipe_500_mm = db.Column(db.Float)
-    pipe_600_mm = db.Column(db.Float)
-    pipe_700_mm = db.Column(db.Float)
-    pipe_900_mm = db.Column(db.Float)
-    pipe_1200_mm = db.Column(db.Float)
+    pipe_150_mm = db.Column(db.Float, default=0)
+    pipe_200_mm = db.Column(db.Float, default=0)
+    pipe_250_mm = db.Column(db.Float, default=0)
+    pipe_300_mm = db.Column(db.Float, default=0)
+    pipe_350_mm = db.Column(db.Float, default=0)
+    pipe_400_mm = db.Column(db.Float, default=0)
+    pipe_450_mm = db.Column(db.Float, default=0)
+    pipe_500_mm = db.Column(db.Float, default=0)
+    pipe_600_mm = db.Column(db.Float, default=0)
+    pipe_700_mm = db.Column(db.Float, default=0)
+    pipe_900_mm = db.Column(db.Float, default=0)
+    pipe_1200_mm = db.Column(db.Float, default=0)
     
-    Total = db.Column(db.Float)
+    Total = db.Column(db.Float, default=0)
     Remarks = db.Column(db.String(500))
     RA_Bill_No=db.Column(db.String(500))
     
@@ -49,24 +47,12 @@ class Laying(db.Model):
         return {c.name: getattr(self, c.name) for c in self.__table__.columns}
     
 
-    def sum_laying_fields():
-        return [
-            "pipe_150_mm", "pipe_200_mm", "pipe_250_mm",
-            "pipe_300_mm", "pipe_350_mm", "pipe_400_mm",
-            "pipe_450_mm", "pipe_500_mm", "pipe_600_mm",
-            "pipe_700_mm", "pipe_900_mm", "pipe_1200_mm"
-        ]
-
-# ===============================
 # AUTO TOTAL USING REGEX
-# ===============================
 def calculate_laying_total(mapper, connection, target):
     total = 0
-
     for column in target.__table__.columns:
-        if PIPE_MM_PATTERN.match(column.name):
+        if RegularExpression.PIPE_MM_PATTERN.match(column.name):
             total += getattr(target, column.name) or 0
-
     target.Total = total
 
 event.listen(Laying, "before_insert", calculate_laying_total)

app/models/manhole_domestic_chamber_model.py

@@ -1,10 +1,7 @@
 from app import db
 from datetime import datetime
 from sqlalchemy import event
-import re
-
-# REGEX PATTERN
-D_RANGE_PATTERN = re.compile(r"^d_\d+(?:_\d+)?_to_\d+(?:_\d+)?$")
+from app.utils.regex_utils import RegularExpression
 
 class ManholeDomesticChamber(db.Model):
     __tablename__ = "manhole_domestic_chamber"
@@ -18,35 +15,35 @@ class ManholeDomesticChamber(db.Model):
     # Basic Fields
     Location = db.Column(db.String(500))
     MH_NO = db.Column(db.String(100))
-    Depth_of_MH = db.Column(db.Float)
+    Depth_of_MH = db.Column(db.Float, default=0)
  
     # Excavation categories 
-    d_0_to_0_75 = db.Column(db.Float)
-    d_0_76_to_1_05 = db.Column(db.Float)
-    d_1_06_to_1_65 = db.Column(db.Float)
-    d_1_66_to_2_15 = db.Column(db.Float)
-    d_2_16_to_2_65 = db.Column(db.Float)
-    d_2_66_to_3_15 = db.Column(db.Float)
-    d_3_16_to_3_65= db.Column(db.Float)
-    d_3_66_to_4_15 = db.Column(db.Float)
-    d_4_16_to_4_65 = db.Column(db.Float)
-    d_4_66_to_5_15 = db.Column(db.Float)
-    d_5_16_to_5_65 = db.Column(db.Float)
-    d_5_66_to_6_15 = db.Column(db.Float)
-    d_6_16_to_6_65 = db.Column(db.Float)
-    d_6_66_to_7_15 = db.Column(db.Float)
-    d_7_16_to_7_65 = db.Column(db.Float)
-    d_7_66_to_8_15 = db.Column(db.Float)
-    d_8_16_to_8_65 = db.Column(db.Float)
-    d_8_66_to_9_15 = db.Column(db.Float)
-    d_9_16_to_9_65 = db.Column(db.Float)
+    d_0_to_0_75 = db.Column(db.Float, default=0)
+    d_0_76_to_1_05 = db.Column(db.Float, default=0)
+    d_1_06_to_1_65 = db.Column(db.Float, default=0)
+    d_1_66_to_2_15 = db.Column(db.Float, default=0)
+    d_2_16_to_2_65 = db.Column(db.Float, default=0)
+    d_2_66_to_3_15 = db.Column(db.Float, default=0)
+    d_3_16_to_3_65= db.Column(db.Float, default=0)
+    d_3_66_to_4_15 = db.Column(db.Float, default=0)
+    d_4_16_to_4_65 = db.Column(db.Float, default=0)
+    d_4_66_to_5_15 = db.Column(db.Float, default=0)
+    d_5_16_to_5_65 = db.Column(db.Float, default=0)
+    d_5_66_to_6_15 = db.Column(db.Float, default=0)
+    d_6_16_to_6_65 = db.Column(db.Float, default=0)
+    d_6_66_to_7_15 = db.Column(db.Float, default=0)
+    d_7_16_to_7_65 = db.Column(db.Float, default=0)
+    d_7_66_to_8_15 = db.Column(db.Float, default=0)
+    d_8_16_to_8_65 = db.Column(db.Float, default=0)
+    d_8_66_to_9_15 = db.Column(db.Float, default=0)
+    d_9_16_to_9_65 = db.Column(db.Float, default=0)
 
-    Domestic_Chambers = db.Column(db.Float)
-    DWC_Pipe_Length = db.Column(db.Float)
-    UPVC_Pipe_Length = db.Column(db.Float)
+    Domestic_Chambers = db.Column(db.Float, default=0)
+    DWC_Pipe_Length = db.Column(db.Float, default=0)
+    UPVC_Pipe_Length = db.Column(db.Float, default=0)
     RA_Bill_No=db.Column(db.String(500))
 
-    Total = db.Column(db.Float)
+    Total = db.Column(db.Float, default=0)
     created_at = db.Column(db.DateTime, default=datetime.today)
 
     def __repr__(self):
@@ -56,28 +53,13 @@ class ManholeDomesticChamber(db.Model):
         return {c.name: getattr(self, c.name) for c in self.__table__.columns}
     
     
-    def sum_mh_dc_fields():
-        return [
-            "d_0_to_0_75", "d_0_76_to_1_05", "d_1_06_to_1_65",
-            "d_1_66_to_2_15", "d_2_16_to_2_65", "d_2_66_to_3_15",
-            "d_3_16_to_3_65", "d_3_66_to_4_15", "d_4_16_to_4_65",
-            "d_4_66_to_5_15", "d_5_16_to_5_65", "d_5_66_to_6_15",
-            "d_6_16_to_6_65", "d_6_66_to_7_15", "d_7_16_to_7_65",
-            "d_7_66_to_8_15", "d_8_16_to_8_65", "d_8_66_to_9_15",
-            "d_9_16_to_9_65"]
-
-# ===============================
 # AUTO TOTAL USING REGEX
-# ===============================
 def calculate_mh_dc_total(mapper, connection, target):
     total = 0
-
     for column in target.__table__.columns:
-        if D_RANGE_PATTERN.match(column.name):
+        if RegularExpression.D_RANGE_PATTERN.match(column.name):
             total += getattr(target, column.name) or 0
-
     target.Total = total
 
-
 event.listen(ManholeDomesticChamber, "before_insert", calculate_mh_dc_total)
 event.listen(ManholeDomesticChamber, "before_update", calculate_mh_dc_total)

app/models/manhole_excavation_model.py

@@ -1,6 +1,7 @@
 from app import db
 from datetime import datetime
 from sqlalchemy import event
+from app.utils.regex_utils import RegularExpression
 
 class ManholeExcavation(db.Model):
     __tablename__ = "manhole_excavation"
@@ -15,47 +16,47 @@ class ManholeExcavation(db.Model):
     Location = db.Column(db.String(500))
     MH_NO = db.Column(db.String(100))
    
-    Upto_IL_Depth = db.Column(db.Float)
-    Cutting_Depth = db.Column(db.Float)
-    ID_of_MH_m = db.Column(db.Float)
-    Ex_Dia_of_Manhole = db.Column(db.Float)
-    Area_of_Manhole = db.Column(db.Float)
+    Upto_IL_Depth = db.Column(db.Float, default=0)
+    Cutting_Depth = db.Column(db.Float, default=0)
+    ID_of_MH_m = db.Column(db.Float, default=0)
+    Ex_Dia_of_Manhole = db.Column(db.Float, default=0)
+    Area_of_Manhole = db.Column(db.Float, default=0)
    
     # Excavation categories
-    Soft_Murum_0_to_1_5 = db.Column(db.Float)
-    Soft_Murum_1_5_to_3_0 = db.Column(db.Float)
-    Soft_Murum_3_0_to_4_5 = db.Column(db.Float)
+    Soft_Murum_0_to_1_5 = db.Column(db.Float, default=0)
+    Soft_Murum_1_5_to_3_0 = db.Column(db.Float, default=0)
+    Soft_Murum_3_0_to_4_5 = db.Column(db.Float, default=0)
 
-    Hard_Murum_0_to_1_5 = db.Column(db.Float)
-    Hard_Murum_1_5_to_3_0 = db.Column(db.Float)
+    Hard_Murum_0_to_1_5 = db.Column(db.Float, default=0)
+    Hard_Murum_1_5_to_3_0 = db.Column(db.Float, default=0)
 
-    Soft_Rock_0_to_1_5 = db.Column(db.Float)
-    Soft_Rock_1_5_to_3_0 = db.Column(db.Float)
+    Soft_Rock_0_to_1_5 = db.Column(db.Float, default=0)
+    Soft_Rock_1_5_to_3_0 = db.Column(db.Float, default=0)
 
-    Hard_Rock_0_to_1_5 = db.Column(db.Float)
-    Hard_Rock_1_5_to_3_0 = db.Column(db.Float)
-    Hard_Rock_3_0_to_4_5 = db.Column(db.Float)
-    Hard_Rock_4_5_to_6_0 = db.Column(db.Float)
-    Hard_Rock_6_0_to_7_5 = db.Column(db.Float)
+    Hard_Rock_0_to_1_5 = db.Column(db.Float, default=0)
+    Hard_Rock_1_5_to_3_0 = db.Column(db.Float, default=0)
+    Hard_Rock_3_0_to_4_5 = db.Column(db.Float, default=0)
+    Hard_Rock_4_5_to_6_0 = db.Column(db.Float, default=0)
+    Hard_Rock_6_0_to_7_5 = db.Column(db.Float, default=0)
 
     # Totals
-    Soft_Murum_0_to_1_5_total = db.Column(db.Float)
-    Soft_Murum_1_5_to_3_0_total = db.Column(db.Float)
-    Soft_Murum_3_0_to_4_5_total = db.Column(db.Float)
+    Soft_Murum_0_to_1_5_total = db.Column(db.Float, default=0)
+    Soft_Murum_1_5_to_3_0_total = db.Column(db.Float, default=0)
+    Soft_Murum_3_0_to_4_5_total = db.Column(db.Float, default=0)
 
-    Hard_Murum_0_to_1_5_total = db.Column(db.Float)
-    Hard_Murum_1_5_and_above_total = db.Column(db.Float)
+    Hard_Murum_0_to_1_5_total = db.Column(db.Float, default=0)
+    Hard_Murum_1_5_and_above_total = db.Column(db.Float, default=0)
 
-    Soft_Rock_0_to_1_5_total = db.Column(db.Float)
-    Soft_Rock_1_5_and_above_total = db.Column(db.Float)
+    Soft_Rock_0_to_1_5_total = db.Column(db.Float, default=0)
+    Soft_Rock_1_5_and_above_total = db.Column(db.Float, default=0)
 
-    Hard_Rock_0_to_1_5_total = db.Column(db.Float)
-    Hard_Rock_1_5_to_3_0_total = db.Column(db.Float)
-    Hard_Rock_3_0_to_4_5_total = db.Column(db.Float)
-    Hard_Rock_4_5_to_6_0_total = db.Column(db.Float)
-    Hard_Rock_6_0_to_7_5_total = db.Column(db.Float)
+    Hard_Rock_0_to_1_5_total = db.Column(db.Float, default=0)
+    Hard_Rock_1_5_to_3_0_total = db.Column(db.Float, default=0)
+    Hard_Rock_3_0_to_4_5_total = db.Column(db.Float, default=0)
+    Hard_Rock_4_5_to_6_0_total = db.Column(db.Float, default=0)
+    Hard_Rock_6_0_to_7_5_total = db.Column(db.Float, default=0)
 
-    Total = db.Column(db.Float)
+    Total = db.Column(db.Float, default=0)
     Remarks = db.Column(db.String(500))
     RA_Bill_No=db.Column(db.String(500))
 
@@ -67,13 +68,11 @@ class ManholeExcavation(db.Model):
     def serialize(self):
         return {c.name: getattr(self, c.name) for c in self.__table__.columns}
 
-# ==========================================
-# AUTO CALCULATE GRAND TOTAL
-# ==========================================
+# AUTO TOTAL USING REGEX
 def calculate_Manhole_total(mapper, connection, target):
     total = 0
     for column in target.__table__.columns:
-        if column.name.endswith("_total"):
+        if RegularExpression.STR_TOTAL_PATTERN.match(column.name):
             total += getattr(target, column.name) or 0
     target.Total = total
 

app/models/mh_dc_client_model.py

@@ -1,45 +1,37 @@
 from app import db
 from datetime import datetime
 from sqlalchemy import event
-import re
-
-# REGEX PATTERN
-D_RANGE_PATTERN = re.compile(r"^d_\d+(?:_\d+)?_to_\d+(?:_\d+)?$")
+from app.utils.regex_utils import RegularExpression
 
 class ManholeDomesticChamberClient(db.Model):
     __tablename__ = "mh_dc_client"
 
     id = db.Column(db.Integer, primary_key=True)
-    #  Foreign Key to Subcontractor table
-    # subcontractor_id = db.Column(db.Integer, db.ForeignKey("subcontractors.id"), nullable=False)
-    # Relationship for easy access (subcontractor.subcontractor_name)
-    # subcontractor = db.relationship("Subcontractor", backref="mh_dc_records")
 
     # Basic Fields
     RA_Bill_No=db.Column(db.String(500))
     Location = db.Column(db.String(500))
     MH_NO = db.Column(db.String(100))
-    MH_TOP_LEVEL = db.Column(db.Float)
-    MH_IL_LEVEL = db.Column(db.Float)
-    Depth_of_MH = db.Column(db.Float)
+    MH_TOP_LEVEL = db.Column(db.Float, default=0)
+    MH_IL_LEVEL = db.Column(db.Float, default=0)
+    Depth_of_MH = db.Column(db.Float, default=0)
    
- 
     # Excavation categories 
-    d_0_to_1_5 = db.Column(db.Float)
-    d_1_5_to_2_0 = db.Column(db.Float)
-    d_2_0_to_2_5 = db.Column(db.Float)
-    d_2_5_to_3_0 = db.Column(db.Float)
-    d_3_0_to_3_5 = db.Column(db.Float)
-    d_3_5_to_4_0 = db.Column(db.Float)
-    d_4_0_to_4_5= db.Column(db.Float)
-    d_4_5_to_5_0 = db.Column(db.Float)
-    d_5_0_to_5_5 = db.Column(db.Float)
-    d_5_5_to_6_0 = db.Column(db.Float)
-    d_6_0_to_6_5 = db.Column(db.Float)
+    d_0_to_1_5 = db.Column(db.Float, default=0)
+    d_1_5_to_2_0 = db.Column(db.Float, default=0)
+    d_2_0_to_2_5 = db.Column(db.Float, default=0)
+    d_2_5_to_3_0 = db.Column(db.Float, default=0)
+    d_3_0_to_3_5 = db.Column(db.Float, default=0)
+    d_3_5_to_4_0 = db.Column(db.Float, default=0)
+    d_4_0_to_4_5= db.Column(db.Float, default=0)
+    d_4_5_to_5_0 = db.Column(db.Float, default=0)
+    d_5_0_to_5_5 = db.Column(db.Float, default=0)
+    d_5_5_to_6_0 = db.Column(db.Float, default=0)
+    d_6_0_to_6_5 = db.Column(db.Float, default=0)
 
-    Domestic_Chambers = db.Column(db.Float)
+    Domestic_Chambers = db.Column(db.Float, default=0)
 
-    Total = db.Column(db.Float)
+    Total = db.Column(db.Float, default=0)
     created_at = db.Column(db.DateTime, default=datetime.today)
 
     def __repr__(self):
@@ -49,27 +41,13 @@ class ManholeDomesticChamberClient(db.Model):
     def serialize(self):
         return {c.name: getattr(self, c.name) for c in self.__table__.columns}
 
-    
-    def sum_mh_dc_fields():
-        return [
-            "d_0_to_0_75", "d_0_76_to_1_05", "d_1_06_to_1_65",
-            "d_1_66_to_2_15", "d_2_16_to_2_65", "d_2_66_to_3_15",
-            "d_3_16_to_3_65", "d_3_66_to_4_15", "d_4_16_to_4_65",
-            "d_4_66_to_5_15", "d_5_16_to_5_65", "d_5_66_to_6_15",
-            "d_6_16_to_6_65", "d_6_66_to_7_15", "d_7_16_to_7_65",
-            "d_7_66_to_8_15", "d_8_16_to_8_65", "d_8_66_to_9_15",
-            "d_9_16_to_9_65" ]
-    
-# ===============================
+
 # AUTO TOTAL USING REGEX
-# ===============================
 def calculate_mh_dc_total(mapper, connection, target):
     total = 0
-
     for column in target.__table__.columns:
-        if D_RANGE_PATTERN.match(column.name):
+        if RegularExpression.D_RANGE_PATTERN.match(column.name):
             total += getattr(target, column.name) or 0
-
     target.Total = total
 
 

app/models/mh_ex_client_model.py

@@ -1,79 +1,76 @@
 from app import db
 from datetime import datetime
 from sqlalchemy import event
+from app.utils.regex_utils import RegularExpression
 
 class ManholeExcavationClient(db.Model):
     __tablename__ = "mh_ex_client"
 
     id = db.Column(db.Integer, primary_key=True)
-    #  Foreign Key to Subcontractor table
-    # subcontractor_id = db.Column(db.Integer, db.ForeignKey("subcontractors.id"), nullable=False)
-    # Relationship for easy access (subcontractor.subcontractor_name)
-    # subcontractor = db.relationship("Subcontractor", backref="mh_ex_records")
 
     # Basic Fields
     RA_Bill_No=db.Column(db.String(500))
     Location = db.Column(db.String(500))
     MH_NO = db.Column(db.String(100))
-    Ground_Level = db.Column(db.Float)
-    MH_Invert_Level = db.Column(db.Float)
-    MH_Top_Level = db.Column(db.Float)
-    Ex_Level = db.Column(db.Float)
-    Cutting_Depth = db.Column(db.Float)
-    MH_Depth = db.Column(db.Float)
-    ID_of_MH_m = db.Column(db.Float)
+    Ground_Level = db.Column(db.Float, default=0)
+    MH_Invert_Level = db.Column(db.Float, default=0)
+    MH_Top_Level = db.Column(db.Float, default=0)
+    Ex_Level = db.Column(db.Float, default=0)
+    Cutting_Depth = db.Column(db.Float, default=0)
+    MH_Depth = db.Column(db.Float, default=0)
+    ID_of_MH_m = db.Column(db.Float, default=0)
 
-    Dia_of_MH_Cutting = db.Column(db.Float)
-    Area_of_Manhole = db.Column(db.Float)
+    Dia_of_MH_Cutting = db.Column(db.Float, default=0)
+    Area_of_Manhole = db.Column(db.Float, default=0)
    
     # Excavation categories
-    Marshi_Muddy_Slushy_0_to_1_5 = db.Column(db.Float)
-    Marshi_Muddy_Slushy_1_5_to_3_0 = db.Column(db.Float)
-    Marshi_Muddy_Slushy_3_0_to_4_5 = db.Column(db.Float)
+    Marshi_Muddy_Slushy_0_to_1_5 = db.Column(db.Float, default=0)
+    Marshi_Muddy_Slushy_1_5_to_3_0 = db.Column(db.Float, default=0)
+    Marshi_Muddy_Slushy_3_0_to_4_5 = db.Column(db.Float, default=0)
 
-    Soft_Murum_0_to_1_5 = db.Column(db.Float)
-    Soft_Murum_1_5_to_3_0 = db.Column(db.Float)
-    Soft_Murum_3_0_to_4_5 = db.Column(db.Float)
+    Soft_Murum_0_to_1_5 = db.Column(db.Float, default=0)
+    Soft_Murum_1_5_to_3_0 = db.Column(db.Float, default=0)
+    Soft_Murum_3_0_to_4_5 = db.Column(db.Float, default=0)
 
-    Hard_Murum_0_to_1_5 = db.Column(db.Float)
-    Hard_Murum_1_5_to_3_0 = db.Column(db.Float)
-    Hard_Murum_3_0_to_4_5 = db.Column(db.Float)
+    Hard_Murum_0_to_1_5 = db.Column(db.Float, default=0)
+    Hard_Murum_1_5_to_3_0 = db.Column(db.Float, default=0)
+    Hard_Murum_3_0_to_4_5 = db.Column(db.Float, default=0)
 
-    Soft_Rock_0_to_1_5 = db.Column(db.Float)
-    Soft_Rock_1_5_to_3_0 = db.Column(db.Float)
-    Soft_Murum_3_0_to_4_5 = db.Column(db.Float)
+    Soft_Rock_0_to_1_5 = db.Column(db.Float, default=0)
+    Soft_Rock_1_5_to_3_0 = db.Column(db.Float, default=0)
+    Soft_Murum_3_0_to_4_5 = db.Column(db.Float, default=0)
 
-    Hard_Rock_0_to_1_5 = db.Column(db.Float)
-    Hard_Rock_1_5_to_3_0 = db.Column(db.Float)
-    Hard_Rock_3_0_to_4_5 = db.Column(db.Float)
-    Hard_Rock_4_5_to_6_0 = db.Column(db.Float)
-    Hard_Rock_6_0_to_7_5 = db.Column(db.Float)
+    Hard_Rock_0_to_1_5 = db.Column(db.Float, default=0)
+    Hard_Rock_1_5_to_3_0 = db.Column(db.Float, default=0)
+    Hard_Rock_3_0_to_4_5 = db.Column(db.Float, default=0)
+    Hard_Rock_4_5_to_6_0 = db.Column(db.Float, default=0)
+    Hard_Rock_6_0_to_7_5 = db.Column(db.Float, default=0)
 
     # Totals
-    Marshi_Muddy_Slushy_0_to_1_5_total = db.Column(db.Float)
-    Marshi_Muddy_Slushy_1_5_to_3_0_total = db.Column(db.Float)
-    Marshi_Muddy_Slushy_3_0_to_4_5_total = db.Column(db.Float)
+    Marshi_Muddy_Slushy_0_to_1_5_total = db.Column(db.Float, default=0)
+    Marshi_Muddy_Slushy_1_5_to_3_0_total = db.Column(db.Float, default=0)
+    Marshi_Muddy_Slushy_3_0_to_4_5_total = db.Column(db.Float, default=0)
 
-    Soft_Murum_0_to_1_5_total = db.Column(db.Float)
-    Soft_Murum_1_5_to_3_0_total = db.Column(db.Float)
-    Soft_Murum_3_0_to_4_5_total = db.Column(db.Float)
+    Soft_Murum_0_to_1_5_total = db.Column(db.Float, default=0)
+    Soft_Murum_1_5_to_3_0_total = db.Column(db.Float, default=0)
+    Soft_Murum_3_0_to_4_5_total = db.Column(db.Float, default=0)
 
-    Hard_Murum_0_to_1_5_total = db.Column(db.Float)
-    Hard_Murum_1_5_to_3_0_total = db.Column(db.Float)
-    Hard_Murum_3_0_to_4_5_total = db.Column(db.Float)
+    Hard_Murum_0_to_1_5_total = db.Column(db.Float, default=0)
+    Hard_Murum_1_5_to_3_0_total = db.Column(db.Float, default=0)
+    Hard_Murum_3_0_to_4_5_total = db.Column(db.Float, default=0)
 
-    Soft_Rock_0_to_1_5_total = db.Column(db.Float)
-    Soft_Rock_1_5_to_3_0_total = db.Column(db.Float)
-    Soft_Rock_3_0_to_4_5_total = db.Column(db.Float)
+    Soft_Rock_0_to_1_5_total = db.Column(db.Float, default=0)
+    Soft_Rock_1_5_to_3_0_total = db.Column(db.Float, default=0)
+    Soft_Rock_3_0_to_4_5_total = db.Column(db.Float, default=0)
 
-    Hard_Rock_0_to_1_5_total = db.Column(db.Float)
-    Hard_Rock_1_5_to_3_0_total = db.Column(db.Float)
-    Hard_Rock_3_0_to_4_5_total = db.Column(db.Float)
-    Hard_Rock_4_5_to_6_0_total = db.Column(db.Float)
-    Hard_Rock_6_0_to_7_5_total = db.Column(db.Float)
+    Hard_Rock_0_to_1_5_total = db.Column(db.Float, default=0)
+    Hard_Rock_1_5_to_3_0_total = db.Column(db.Float, default=0)
+    Hard_Rock_3_0_to_4_5_total = db.Column(db.Float, default=0)
+    Hard_Rock_4_5_to_6_0_total = db.Column(db.Float, default=0)
+    Hard_Rock_6_0_to_7_5_total = db.Column(db.Float, default=0)
 
     Remarks = db.Column(db.String(500))
-    Total = db.Column(db.Float)
+    Total = db.Column(db.Float, default=0)
 
     created_at = db.Column(db.DateTime, default=datetime.today)
 
@@ -84,13 +81,11 @@ class ManholeExcavationClient(db.Model):
         return {c.name: getattr(self, c.name) for c in self.__table__.columns}
 
 
-# ==========================================
-# AUTO CALCULATE GRAND TOTAL
-# ==========================================
+# AUTO TOTAL USING REGEX
 def calculate_Manhole_total(mapper, connection, target):
     total = 0
     for column in target.__table__.columns:
-        if column.name.endswith("_total"):
+        if RegularExpression.STR_TOTAL_PATTERN.match(column.name):
             total += getattr(target, column.name) or 0
     target.Total = total
 

app/models/tr_ex_client_model.py

@@ -1,6 +1,7 @@
 from app import db
 from datetime import datetime
 from sqlalchemy import event
+from app.utils.regex_utils import RegularExpression
 
 class TrenchExcavationClient(db.Model):
     __tablename__ = "tr_ex_client"
@@ -11,69 +12,69 @@ class TrenchExcavationClient(db.Model):
     RA_Bill_No=db.Column(db.String(500))
     Location = db.Column(db.String(500))
     MH_NO = db.Column(db.String(100))
-    CC_length = db.Column(db.Float)
-    Actual_Trench_Length = db.Column(db.Float)
-    Ground_Level = db.Column(db.Float)
-    Invert_Level = db.Column(db.Float)
-    Excavated_level = db.Column(db.Float)
-    Cutting_Depth = db.Column(db.Float)
-    Avg_Depth = db.Column(db.Float)
-    Pipe_Dia_mm = db.Column(db.Float)
+    CC_length = db.Column(db.Float, default=0)
+    Actual_Trench_Length = db.Column(db.Float, default=0)
+    Ground_Level = db.Column(db.Float, default=0)
+    Invert_Level = db.Column(db.Float, default=0)
+    Excavated_level = db.Column(db.Float, default=0)
+    Cutting_Depth = db.Column(db.Float, default=0)
+    Avg_Depth = db.Column(db.Float, default=0)
+    Pipe_Dia_mm = db.Column(db.Float, default=0)
  
     # width
-    Width_0_to_1_5_m = db.Column(db.Float)
-    Width_1_5_to_3_0_m = db.Column(db.Float)
-    Width_3_0_to_4_5_m = db.Column(db.Float)
-    Width_4_5_to_6_0_m = db.Column(db.Float)
-    Width_6_0_to_7_5_m = db.Column(db.Float)
+    Width_0_to_1_5_m = db.Column(db.Float, default=0)
+    Width_1_5_to_3_0_m = db.Column(db.Float, default=0)
+    Width_3_0_to_4_5_m = db.Column(db.Float, default=0)
+    Width_4_5_to_6_0_m = db.Column(db.Float, default=0)
+    Width_6_0_to_7_5_m = db.Column(db.Float, default=0)
 
     # Excavation categories
-    Marshi_Muddy_Slushy_0_to_1_5 = db.Column(db.Float)
-    Marshi_Muddy_Slushy_1_5_to_3_0 = db.Column(db.Float)
-    Marshi_Muddy_Slushy_3_0_to_4_5 = db.Column(db.Float)
+    Marshi_Muddy_Slushy_0_to_1_5 = db.Column(db.Float, default=0)
+    Marshi_Muddy_Slushy_1_5_to_3_0 = db.Column(db.Float, default=0)
+    Marshi_Muddy_Slushy_3_0_to_4_5 = db.Column(db.Float, default=0)
 
-    Soft_Murum_0_to_1_5 = db.Column(db.Float)
-    Soft_Murum_1_5_to_3_0 = db.Column(db.Float)
-    Soft_Murum_3_0_to_4_5 = db.Column(db.Float)
+    Soft_Murum_0_to_1_5 = db.Column(db.Float, default=0)
+    Soft_Murum_1_5_to_3_0 = db.Column(db.Float, default=0)
+    Soft_Murum_3_0_to_4_5 = db.Column(db.Float, default=0)
 
-    Hard_Murum_0_to_1_5 = db.Column(db.Float)
-    Hard_Murum_1_5_to_3_0 = db.Column(db.Float)
-    Hard_Murum_3_0_to_4_5 = db.Column(db.Float)
+    Hard_Murum_0_to_1_5 = db.Column(db.Float, default=0)
+    Hard_Murum_1_5_to_3_0 = db.Column(db.Float, default=0)
+    Hard_Murum_3_0_to_4_5 = db.Column(db.Float, default=0)
 
-    Soft_Rock_0_to_1_5 = db.Column(db.Float)
-    Soft_Rock_1_5_to_3_0 = db.Column(db.Float)
-    Soft_Rock_3_0_to_4_5 = db.Column(db.Float)
+    Soft_Rock_0_to_1_5 = db.Column(db.Float, default=0)
+    Soft_Rock_1_5_to_3_0 = db.Column(db.Float, default=0)
+    Soft_Rock_3_0_to_4_5 = db.Column(db.Float, default=0)
 
-    Hard_Rock_0_to_1_5 = db.Column(db.Float)
-    Hard_Rock_1_5_to_3_0 = db.Column(db.Float)
-    Hard_Rock_3_0_to_4_5 = db.Column(db.Float)
-    Hard_Rock_4_5_to_6_0 = db.Column(db.Float)
-    Hard_Rock_6_0_to_7_5 = db.Column(db.Float)
+    Hard_Rock_0_to_1_5 = db.Column(db.Float, default=0)
+    Hard_Rock_1_5_to_3_0 = db.Column(db.Float, default=0)
+    Hard_Rock_3_0_to_4_5 = db.Column(db.Float, default=0)
+    Hard_Rock_4_5_to_6_0 = db.Column(db.Float, default=0)
+    Hard_Rock_6_0_to_7_5 = db.Column(db.Float, default=0)
 
     # Totals
-    Marshi_Muddy_Slushy_0_to_1_5_total = db.Column(db.Float)
-    Marshi_Muddy_Slushy_1_5_to_3_0_total = db.Column(db.Float)
-    Marshi_Muddy_Slushy_3_0_to_4_5_total = db.Column(db.Float)
+    Marshi_Muddy_Slushy_0_to_1_5_total = db.Column(db.Float, default=0)
+    Marshi_Muddy_Slushy_1_5_to_3_0_total = db.Column(db.Float, default=0)
+    Marshi_Muddy_Slushy_3_0_to_4_5_total = db.Column(db.Float, default=0)
 
-    Soft_Murum_0_to_1_5_total = db.Column(db.Float)
-    Soft_Murum_1_5_to_3_0_total = db.Column(db.Float)
-    Soft_Murum_3_0_to_4_5_total = db.Column(db.Float)
+    Soft_Murum_0_to_1_5_total = db.Column(db.Float, default=0)
+    Soft_Murum_1_5_to_3_0_total = db.Column(db.Float, default=0)
+    Soft_Murum_3_0_to_4_5_total = db.Column(db.Float, default=0)
 
-    Hard_Murum_0_to_1_5_total = db.Column(db.Float)
-    Hard_Murum_1_5_to_3_0_total = db.Column(db.Float)
-    Hard_Murum_3_0_to_4_5_total = db.Column(db.Float)
+    Hard_Murum_0_to_1_5_total = db.Column(db.Float, default=0)
+    Hard_Murum_1_5_to_3_0_total = db.Column(db.Float, default=0)
+    Hard_Murum_3_0_to_4_5_total = db.Column(db.Float, default=0)
 
-    Soft_Rock_0_to_1_5_total = db.Column(db.Float)
-    Soft_Rock_1_5_to_3_0_total = db.Column(db.Float)
-    Soft_Rock_3_0_to_4_5_total = db.Column(db.Float)
+    Soft_Rock_0_to_1_5_total = db.Column(db.Float, default=0)
+    Soft_Rock_1_5_to_3_0_total = db.Column(db.Float, default=0)
+    Soft_Rock_3_0_to_4_5_total = db.Column(db.Float, default=0)
 
-    Hard_Rock_0_to_1_5_total = db.Column(db.Float)
-    Hard_Rock_1_5_to_3_0_total = db.Column(db.Float)
-    Hard_Rock_3_0_to_4_5_total = db.Column(db.Float)
-    Hard_Rock_4_5_to_6_0_total = db.Column(db.Float)
-    Hard_Rock_6_0_to_7_5_total = db.Column(db.Float)
+    Hard_Rock_0_to_1_5_total = db.Column(db.Float, default=0)
+    Hard_Rock_1_5_to_3_0_total = db.Column(db.Float, default=0)
+    Hard_Rock_3_0_to_4_5_total = db.Column(db.Float, default=0)
+    Hard_Rock_4_5_to_6_0_total = db.Column(db.Float, default=0)
+    Hard_Rock_6_0_to_7_5_total = db.Column(db.Float, default=0)
 
-    Total = db.Column(db.Float)
+    Total = db.Column(db.Float, default=0)
     Remarks = db.Column(db.String(500))
 
     created_at = db.Column(db.DateTime, default=datetime.today)
@@ -85,17 +86,13 @@ class TrenchExcavationClient(db.Model):
             return {c.name: getattr(self, c.name) for c in self.__table__.columns}
 
 
-# ==========================================
-# AUTO CALCULATE GRAND TOTAL
-# ==========================================
-
+# AUTO TOTAL USING REGEX
 def calculate_trench_client_total(mapper, connection, target):
     total = 0
     for column in target.__table__.columns:
-        if column.name.endswith("_total"):
+        if RegularExpression.STR_TOTAL_PATTERN.match(column.name):
             total += getattr(target, column.name) or 0
     target.Total = total
 
-
 event.listen(TrenchExcavationClient, "before_insert", calculate_trench_client_total)
 event.listen(TrenchExcavationClient, "before_update", calculate_trench_client_total)

app/models/trench_excavation_model.py

@@ -1,6 +1,7 @@
 from app import db
 from datetime import datetime
 from sqlalchemy import event
+from app.utils.regex_utils import RegularExpression
 
 class TrenchExcavation(db.Model):
     __tablename__ = "trench_excavation"
@@ -14,59 +15,59 @@ class TrenchExcavation(db.Model):
     # Basic Fields
     Location = db.Column(db.String(500))
     MH_NO = db.Column(db.String(100))
-    CC_length = db.Column(db.Float)
-    Invert_Level = db.Column(db.Float)
-    MH_Top_Level = db.Column(db.Float)
-    Ground_Level = db.Column(db.Float)
-    ID_of_MH_m = db.Column(db.Float)
-    Actual_Trench_Length = db.Column(db.Float)
-    Pipe_Dia_mm = db.Column(db.Float)
+    CC_length = db.Column(db.Float, default=0)
+    Invert_Level = db.Column(db.Float, default=0)
+    MH_Top_Level = db.Column(db.Float, default=0)
+    Ground_Level = db.Column(db.Float, default=0)
+    ID_of_MH_m = db.Column(db.Float, default=0)
+    Actual_Trench_Length = db.Column(db.Float, default=0)
+    Pipe_Dia_mm = db.Column(db.Float, default=0)
 
     # width
-    Width_0_to_2_5 = db.Column(db.Float)
-    Width_2_5_to_3_0 = db.Column(db.Float)
-    Width_3_0_to_4_5 = db.Column(db.Float)
-    Width_4_5_to_6_0 = db.Column(db.Float)
+    Width_0_to_2_5 = db.Column(db.Float, default=0)
+    Width_2_5_to_3_0 = db.Column(db.Float, default=0)
+    Width_3_0_to_4_5 = db.Column(db.Float, default=0)
+    Width_4_5_to_6_0 = db.Column(db.Float, default=0)
 
-    Upto_IL_Depth = db.Column(db.Float)
-    Cutting_Depth = db.Column(db.Float)
-    Avg_Depth = db.Column(db.Float)
+    Upto_IL_Depth = db.Column(db.Float, default=0)
+    Cutting_Depth = db.Column(db.Float, default=0)
+    Avg_Depth = db.Column(db.Float, default=0)
 
     # Excavation categories
-    Soft_Murum_0_to_1_5 = db.Column(db.Float)
-    Soft_Murum_1_5_to_3_0 = db.Column(db.Float)
-    Soft_Murum_3_0_to_4_5 = db.Column(db.Float)
+    Soft_Murum_0_to_1_5 = db.Column(db.Float, default=0)
+    Soft_Murum_1_5_to_3_0 = db.Column(db.Float, default=0)
+    Soft_Murum_3_0_to_4_5 = db.Column(db.Float, default=0)
 
-    Hard_Murum_0_to_1_5 = db.Column(db.Float)
-    Hard_Murum_1_5_to_3_0 = db.Column(db.Float)
+    Hard_Murum_0_to_1_5 = db.Column(db.Float, default=0)
+    Hard_Murum_1_5_to_3_0 = db.Column(db.Float, default=0)
 
-    Soft_Rock_0_to_1_5 = db.Column(db.Float)
-    Soft_Rock_1_5_to_3_0 = db.Column(db.Float)
+    Soft_Rock_0_to_1_5 = db.Column(db.Float, default=0)
+    Soft_Rock_1_5_to_3_0 = db.Column(db.Float, default=0)
 
-    Hard_Rock_0_to_1_5 = db.Column(db.Float)
-    Hard_Rock_1_5_to_3_0 = db.Column(db.Float)
-    Hard_Rock_3_0_to_4_5 = db.Column(db.Float)
-    Hard_Rock_4_5_to_6_0 = db.Column(db.Float)
-    Hard_Rock_6_0_to_7_5 = db.Column(db.Float)
+    Hard_Rock_0_to_1_5 = db.Column(db.Float, default=0)
+    Hard_Rock_1_5_to_3_0 = db.Column(db.Float, default=0)
+    Hard_Rock_3_0_to_4_5 = db.Column(db.Float, default=0)
+    Hard_Rock_4_5_to_6_0 = db.Column(db.Float, default=0)
+    Hard_Rock_6_0_to_7_5 = db.Column(db.Float, default=0)
 
     # Totals
-    Soft_Murum_0_to_1_5_total = db.Column(db.Float)
-    Soft_Murum_1_5_to_3_0_total = db.Column(db.Float)
-    Soft_Murum_3_0_to_4_5_total = db.Column(db.Float)
+    Soft_Murum_0_to_1_5_total = db.Column(db.Float, default=0)
+    Soft_Murum_1_5_to_3_0_total = db.Column(db.Float, default=0)
+    Soft_Murum_3_0_to_4_5_total = db.Column(db.Float, default=0)
 
-    Hard_Murum_0_to_1_5_total = db.Column(db.Float)
-    Hard_Murum_1_5_and_above_total = db.Column(db.Float)
+    Hard_Murum_0_to_1_5_total = db.Column(db.Float, default=0)
+    Hard_Murum_1_5_and_above_total = db.Column(db.Float, default=0)
 
-    Soft_Rock_0_to_1_5_total = db.Column(db.Float)
-    Soft_Rock_1_5_and_above_total = db.Column(db.Float)
+    Soft_Rock_0_to_1_5_total = db.Column(db.Float, default=0)
+    Soft_Rock_1_5_and_above_total = db.Column(db.Float, default=0)
 
-    Hard_Rock_0_to_1_5_total = db.Column(db.Float)
-    Hard_Rock_1_5_to_3_0_total = db.Column(db.Float)
-    Hard_Rock_3_0_to_4_5_total = db.Column(db.Float)
-    Hard_Rock_4_5_to_6_0_total = db.Column(db.Float)
-    Hard_Rock_6_0_to_7_5_total = db.Column(db.Float)
+    Hard_Rock_0_to_1_5_total = db.Column(db.Float, default=0)
+    Hard_Rock_1_5_to_3_0_total = db.Column(db.Float, default=0)
+    Hard_Rock_3_0_to_4_5_total = db.Column(db.Float, default=0)
+    Hard_Rock_4_5_to_6_0_total = db.Column(db.Float, default=0)
+    Hard_Rock_6_0_to_7_5_total = db.Column(db.Float, default=0)
 
-    Total = db.Column(db.Float)
+    Total = db.Column(db.Float, default=0)
     Remarks = db.Column(db.String(500))
     RA_Bill_No=db.Column(db.String(500))
     
@@ -79,44 +80,12 @@ class TrenchExcavation(db.Model):
     def serialize(self):
         return {c.name: getattr(self, c.name) for c in self.__table__.columns}
     
-    def excavation_category_sums(self):
 
-        def safe(val):
-            return val or 0
-
-        return {
-            "Soft_Murum_Total": (
-                safe(self.Soft_Murum_0_to_1_5)
-                + safe(self.Soft_Murum_1_5_to_3_0)
-                + safe(self.Soft_Murum_3_0_to_4_5)
-            ),
-
-            "Hard_Murum_Total": (
-                safe(self.Hard_Murum_0_to_1_5)
-                + safe(self.Hard_Murum_1_5_to_3_0)
-            ),
-
-            "Soft_Rock_Total": (
-                safe(self.Soft_Rock_0_to_1_5)
-                + safe(self.Soft_Rock_1_5_to_3_0)
-            ),
-
-            "Hard_Rock_Total": (
-                safe(self.Hard_Rock_0_to_1_5)
-                + safe(self.Hard_Rock_1_5_to_3_0)
-                + safe(self.Hard_Rock_3_0_to_4_5)
-                + safe(self.Hard_Rock_4_5_to_6_0)
-                + safe(self.Hard_Rock_6_0_to_7_5)
-            ),
-        }
-
-# ==========================================
-# AUTO CALCULATE GRAND TOTAL
-# ==========================================
+# AUTO TOTAL USING REGEX
 def calculate_trench_total(mapper, connection, target):
     total = 0
     for column in target.__table__.columns:
-        if column.name.endswith("_total"):
+        if RegularExpression.STR_TOTAL_PATTERN.match(column.name):
             total += getattr(target, column.name) or 0
     target.Total = total
 

app/models/user_model.py

@@ -5,7 +5,7 @@ class User(db.Model):
     __tablename__ = "users"
 
     id = db.Column(db.Integer, primary_key=True)
-    name = db.Column(db.String(120), nullable=False)
+    name = db.Column(db.String(200), nullable=False)
     email = db.Column(db.String(120), unique=True, nullable=False)
     password_hash = db.Column(db.String(255), nullable=False)
 

app/routes/dashboard.py

@@ -1,7 +1,7 @@
 import matplotlib
 matplotlib.use("Agg")
 
-from flask import Blueprint, render_template, session, redirect, url_for, jsonify
+from flask import Blueprint, render_template, session, redirect, url_for, jsonify, request
 import matplotlib.pyplot as plt
 import io
 import base64
@@ -13,101 +13,16 @@ from app.models.trench_excavation_model import TrenchExcavation
 from app.models.manhole_excavation_model import ManholeExcavation
 from app.models.laying_model import Laying
 
+from app.models.subcontractor_model import Subcontractor
+
 dashboard_bp = Blueprint("dashboard", __name__, url_prefix="/dashboard")
 
 
-
-
-
-
-
-# import matplotlib
-# matplotlib.use("Agg")
-
-# from flask import Blueprint, render_template, session, redirect, url_for
-# import matplotlib.pyplot as plt
-# import io
-# import base64
-# from app.utils.plot_utils import plot_to_base64
-# from app.services.dashboard_service import DashboardService
-
-# dashboard_bp = Blueprint("dashboard", __name__, url_prefix="/dashboard")
-
-# # dashboard_bp = Blueprint("dashboard", __name__)
-
-# # charts 
-# # def plot_to_base64():
-# #     img = io.BytesIO()
-# #     plt.savefig(img, format="png", bbox_inches="tight")
-# #     plt.close()
-# #     img.seek(0)
-# #     return base64.b64encode(img.getvalue()).decode()
-
-# # bar chart
-# def bar_chart():
-#     categories = ["Trench", "Manhole", "Pipe Laying", "Restoration"]
-#     values = [120, 80, 150, 60]
-
-#     plt.figure()
-#     plt.bar(categories, values)
-#     plt.title("Work Category Report")
-#     plt.xlabel("test Category")
-#     plt.ylabel("test Quantity")
-
-
-#     return plot_to_base64(plt)
-
-# # Pie chart
-# def pie_chart():
-#     labels = ["Completed", "In Progress", "Pending"]
-#     sizes = [55, 20, 25]
-
-#     plt.figure()
-#     plt.pie(sizes, labels=labels, autopct="%1.1f%%", startangle=140)
-#     plt.title("Project Status")
-
-#     return plot_to_base64(plt)
-
-# # Histogram chart
-# def histogram_chart():
-#     daily_work = [5, 10, 15, 20, 20, 25, 30, 35, 40, 45, 50]
-
-#     plt.figure()
-#     plt.hist(daily_work, bins=5)
-#     plt.title("Daily Work Distribution")
-#     plt.xlabel("Work Units")
-#     plt.ylabel("Frequency")
-
-#     return plot_to_base64(plt)
-
-# # Dashboaed page
-# @dashboard_bp.route("/")
-# def dashboard():
-#     if not session.get("user_id"):
-#         return redirect(url_for("auth.login"))
-
-#     return render_template(
-#         "dashboard.html",
-#         title="Dashboard",
-#         bar_chart=bar_chart(),
-#         pie_chart=pie_chart(),
-#         histogram=histogram_chart()
-#     )
-
-# # subcontractor dashboard
-# @dashboard_bp.route("/subcontractor_dashboard", methods=["GET", "POST"])
-# def subcontractor_dashboard():
-#     if not session.get("user_id"):
-#         return redirect(url_for("auth.login"))
-
-#     tr_dash = DashboardService().bar_chart_of_tr_ex
-    
-    
-#     return render_template(
-#         "subcontractor_dashboard.html",
-#         title="Dashboard",
-#         bar_chart=tr_dash
-#     )
+@dashboard_bp.route("/")
+def dashboard():
+    if not session.get("user_id"):
+        return redirect(url_for("auth.login"))
+    return render_template("dashboard.html", title="Business Intelligence Dashboard")
 
 
 @dashboard_bp.route("/api/live-stats")
@@ -144,25 +59,56 @@ def live_stats():
     except Exception as e:
         return jsonify({"error": str(e)}), 500
 
-@dashboard_bp.route("/")
-def dashboard():
-    if not session.get("user_id"):
-        return redirect(url_for("auth.login"))
-    return render_template("dashboard.html", title="Business Intelligence Dashboard")
 
 
 
 # subcontractor dashboard
-@dashboard_bp.route("/subcontractor_dashboard", methods=["GET", "POST"])
+@dashboard_bp.route("/subcontractor_dashboard")
 def subcontractor_dashboard():
+
     if not session.get("user_id"):
         return redirect(url_for("auth.login"))
 
-    tr_dash = DashboardService().bar_chart_of_tr_ex
-    
-    
+    subcontractors = Subcontractor.query.all()
+
     return render_template(
         "subcontractor_dashboard.html",
-        title="Dashboard",
-        bar_chart=tr_dash
-    )
+        subcontractors=subcontractors
+    )
+
+
+# API FOR CHART DATA
+@dashboard_bp.route("/api/subcontractor-chart")
+def subcontractor_chart():
+
+    subcontractor_id = request.args.get("subcontractor")
+    category = request.args.get("category")
+    ra_bill = request.args.get("ra_bill")
+
+    query = db.session.query(
+        TrenchExcavation.excavation_category,
+        func.sum(TrenchExcavation.Total)
+    )
+
+    if subcontractor_id:
+        query = query.filter(TrenchExcavation.subcontractor_id == subcontractor_id)
+
+    if category:
+        query = query.filter(TrenchExcavation.subcontractor_id == subcontractor_id)
+
+    if ra_bill:
+        query = query.filter(TrenchExcavation.RA_Bill_No == ra_bill)
+
+    results = query.group_by(TrenchExcavation.excavation_category).all()
+
+    labels = []
+    values = []
+
+    for r in results:
+        labels.append(r[0])
+        values.append(float(r[1] or 0))
+
+    return jsonify({
+        "labels": labels,
+        "values": values
+    })

app/routes/file_format.py

@@ -1,5 +1,6 @@
 from flask import Blueprint, render_template, send_from_directory, abort, current_app
 from app.utils.helpers import login_required
+from app.utils.file_utils import get_download_format_folder
 import os
 
 file_format_bp  = Blueprint("file_format", __name__)
@@ -14,10 +15,7 @@ def download_format():
 @login_required
 def download_excel_format(filename):
 
-    download_folder = os.path.join(
-        current_app.root_path, "static", "downloads/format"
-    )
-
+    download_folder = get_download_format_folder()
     file_path = os.path.join(download_folder, filename)
 
     if not os.path.exists(file_path):

app/routes/file_report.py

@@ -141,20 +141,23 @@ def report_file():
         download_all=download_all
     )
  
-# --- client report only --- 
+
+# --- CLIENT REPORT (PREVIEW + DOWNLOAD) ---
 @file_report_bp.route("/client_report", methods=["GET", "POST"])
 @login_required
 def client_vs_all_subcontractor():
     tables = {"tr": None, "mh": None, "dc": None}
     ra_val = ""
- 
+
     if request.method == "POST":
+
+        # ⚠ MUST match HTML name
         RA_Bill_No = request.form.get("RA_Bill_No")
         ra_val = RA_Bill_No
- 
+
         if not RA_Bill_No:
             flash("Please enter RA Bill No.", "danger")
-            return render_template("client_report.html", tables=tables, ra_val=ra_val)
+            return render_template("generate_comparison_client_vs_subcont.html", tables=tables, ra_val=ra_val)
  
         clientBill = ClientBill()
         clientBill.Fetch(RA_Bill_No=RA_Bill_No)
@@ -164,7 +167,7 @@ def client_vs_all_subcontractor():
         # --- SAFETY CHECK: Verify data exists before merging ---
         if clientBill.df_tr.empty and clientBill.df_mh.empty:
             flash(f"No Client records found for RA Bill {RA_Bill_No}", "warning")
-            return render_template("client_report.html", tables=tables, ra_val=ra_val)
+            return render_template("generate_comparison_client_vs_subcont.html", tables=tables, ra_val=ra_val)
  
         qty_cols = [...] # (Keep your existing list)
         mh_dc_qty_cols = [...] # (Keep your existing list)

app/routes/generate_comparison_report.py

@@ -2,7 +2,7 @@ from flask import Blueprint, render_template, request, send_file, flash
 from collections import defaultdict
 import pandas as pd
 import io
- 
+
 from app.models.subcontractor_model import Subcontractor
 from app.models.trench_excavation_model import TrenchExcavation
 from app.models.manhole_excavation_model import ManholeExcavation
@@ -15,17 +15,13 @@ from app.models.mh_dc_client_model import ManholeDomesticChamberClient
 from app.models.laying_client_model import LayingClient
  
 from app.utils.helpers import login_required
-import re
+from app.utils.regex_utils import RegularExpression
  
  
 generate_report_bp = Blueprint("generate_report", __name__, url_prefix="/report")
  
  
-# sum field  of pipe laying (pipe_150_mm)
-PIPE_MM_PATTERN = re.compile(r"^pipe_\d+_mm$")
-# sum fields of MH dc (d_0_to_0_75)
-D_RANGE_PATTERN = re.compile( r"^d_\d+(?:_\d+)?_to_\d+(?:_\d+)?$")
- 
+
  
 # NORMALIZER
 def normalize_key(value):
@@ -80,6 +76,7 @@ def build_comparison(client_rows, contractor_rows, key_field):
     used_index = defaultdict(int)  # 🔥 THIS FIXES YOUR ISSUE
  
     for c in client_rows:
+     
         client_location = normalize_key(c.get("Location"))
         client_key = normalize_key(c.get(key_field))
  
@@ -104,16 +101,16 @@ def build_comparison(client_rows, contractor_rows, key_field):
             float(v or 0)
             for k, v in c.items()
             if k.endswith("_total")
-            or D_RANGE_PATTERN.match(k)
-            or PIPE_MM_PATTERN.match(k)
+            or RegularExpression.D_RANGE_PATTERN.match(k)
+            or RegularExpression.PIPE_MM_PATTERN.match(k)
         )
  
         sub_total = sum(
             float(v or 0)
             for k, v in s.items()
             if k.endswith("_total")
-            or D_RANGE_PATTERN.match(k)
-            or PIPE_MM_PATTERN.match(k)
+            or RegularExpression.D_RANGE_PATTERN.match(k)
+            or RegularExpression.PIPE_MM_PATTERN.match(k)
         )
  
         row = {
@@ -138,7 +135,9 @@ def build_comparison(client_rows, contractor_rows, key_field):
         output.append(row)
  
     df = pd.DataFrame(output)
+    # formatting headers    
     df.columns = [format_header(col) for col in df.columns]
+    
     return df
  
  
@@ -225,15 +224,12 @@ def comparison_report():
             subcontractor_id=subcontractor_id
         ).all()]
         df_dc = build_comparison(dc_client, dc_sub, "MH_NO")
-        # df_dc = build_comparison_mh_dc(dc_client, dc_sub, "MH_NO")
  
         lay_client = [r.serialize() for r in LayingClient.query.all()]
         lay_sub = [r.serialize() for r in Laying.query.filter_by(
             subcontractor_id=subcontractor_id
         ).all()]
         df_lay = build_comparison(lay_client, lay_sub, "MH_NO")
-        # df_lay = build_comparison_laying(lay_client, lay_sub, "MH_NO")
- 
  
         # -------- EXCEL --------
         output = io.BytesIO()
@@ -254,106 +250,4 @@ def comparison_report():
         )
  
     return render_template("generate_comparison_report.html",subcontractors=subcontractors)
- 
- 
-# def build_comparison_mh_dc(client_rows, contractor_rows, key_field):
-#     contractor_lookup = make_lookup(contractor_rows, key_field)
-#     mh_dc_fields = ManholeDomesticChamberClient.sum_mh_dc_fields()
- 
-#     output = []
- 
-#     for c in client_rows:
-#         loc = normalize_key(c.get("Location"))
-#         key = normalize_key(c.get(key_field))
-#         if not loc or not key:
-#             continue
- 
-#         s = contractor_lookup.get((loc, key))
-#         if not s:
-#             continue
- 
-#         client_total = sum(float(c.get(f, 0) or 0) for f in mh_dc_fields)
-#         sub_total = sum(float(s.get(f, 0) or 0) for f in mh_dc_fields)
- 
-#         row = {
-#             "Location": loc,
-#             key_field.replace("_", " "): key
-#         }
- 
-#         # CLIENT – ALL FIELDS
-#         for k, v in c.items():
-#             if k in ["id", "created_at"]:
-#                 continue
-#             row[f"Client-{k}"] = v
- 
-#         row["Client-Total"] = round(client_total, 2)
-#         row[" "] = ""
- 
-#         # SUBCONTRACTOR – ALL FIELDS
-#         for k, v in s.items():
-#             if k in ["id", "created_at", "subcontractor_id"]:
-#                 continue
-#             row[f"Subcontractor-{k}"] = v
- 
-#         row["Subcontractor-Total"] = round(sub_total, 2)
-#         row["Diff"] = round(client_total - sub_total, 2)
- 
-#         output.append(row)
- 
-#     df = pd.DataFrame(output)
-#     df.columns = [format_header(col) for col in df.columns]
-#     return df
- 
- 
-# def build_comparison_laying(client_rows, contractor_rows, key_field):
-#     contractor_lookup = make_lookup(contractor_rows, key_field)
-#     laying_fields = Laying.sum_laying_fields()
- 
-#     output = []
- 
-#     for c in client_rows:
-#         loc = normalize_key(c.get("Location"))
-#         key = normalize_key(c.get(key_field))
-#         if not loc or not key:
-#             continue
- 
-#         s = contractor_lookup.get((loc, key))
-#         if not s:
-#             continue
- 
-#         client_total = sum(float(c.get(f, 0) or 0) for f in laying_fields)
-#         sub_total = sum(float(s.get(f, 0) or 0) for f in laying_fields)
- 
-#         print("--------------",key,"----------")
-#         print("sum -client_total ",client_total)
-#         print("sum -sub_total ",sub_total)
-#         print("Diff ---- ",client_total - sub_total)
-#         print("------------------------")
-#         row = {
-#             "Location": loc,
-#             key_field.replace("_", " "): key
-#         }
- 
-#         # CLIENT – ALL FIELDS
-#         for k, v in c.items():
-#             if k in ["id", "created_at"]:
-#                 continue
-#             row[f"Client-{k}"] = v
- 
-#         row["Client-Total"] = round(client_total, 2)
-#         row[" "] = ""
- 
-#         # SUBCONTRACTOR – ALL FIELDS
-#         for k, v in s.items():
-#             if k in ["id", "created_at", "subcontractor_id"]:
-#                 continue
-#             row[f"Subcontractor-{k}"] = v
- 
-#         row["Subcontractor-Total"] = round(sub_total, 2)
-#         row["Diff"] = round(client_total - sub_total, 2)
- 
-#         output.append(row)
- 
-#     df = pd.DataFrame(output)
-#     df.columns = [format_header(col) for col in df.columns]
-#     return df
+ 

app/routes/subcontractor_routes.py

@@ -1,191 +1,159 @@
-from flask import Blueprint, render_template, request, redirect, flash
-from app import db
+from flask import Blueprint, render_template, request, redirect, flash, current_app, url_for
+from app.services.db_service import db
 from app.models.subcontractor_model import Subcontractor
 from app.utils.helpers import login_required
- 
+
 subcontractor_bp = Blueprint("subcontractor", __name__, url_prefix="/subcontractor")
- 
-# ---------------- ADD -----------------
-@subcontractor_bp.route("/add")
-@login_required
-def add_subcontractor():
-    return render_template("subcontractor/add.html")
-@subcontractor_bp.route("/save", methods=["POST"])
-@login_required
-def save_subcontractor():
-    # 1. Get and clean the name from the form
-    name = request.form.get("subcontractor_name", "").strip()
- 
-    # 2. Basic validation: Ensure the name isn't empty
-    if not name:
-        flash("Subcontractor name cannot be empty.", "danger")
-        return redirect("/subcontractor/add")
- 
-    # 3. Check if a subcontractor with this name already exists
-    existing_sub = Subcontractor.query.filter_by(subcontractor_name=name).first()
- 
-    if existing_sub:
-        flash(f"Subcontractor with name '{name}' already exists!", "danger")
-        return redirect("/subcontractor/add")
- 
-    # 4. If no duplicate is found, proceed to save
-    try:
-        subcontractor = Subcontractor(
-            subcontractor_name=name,
-            contact_person=request.form.get("contact_person"),
-            mobile_no=request.form.get("mobile_no"),
-            email_id=request.form.get("email_id"),
-            gst_no=request.form.get("gst_no")
-        )
-       
-        db.session.add(subcontractor)
-        db.session.commit()
-        flash("Subcontractor added successfully!", "success")
-       
-    except Exception as e:
-        db.session.rollback()
-        flash("An error occurred while saving. Please try again.", "danger")
- 
-    return redirect("/subcontractor/list")
- 
-# ---------------- LIST -----------------
-@subcontractor_bp.route("/list")
-@login_required
-def subcontractor_list():
-    subcontractors = Subcontractor.query.all()
-    return render_template("subcontractor/list.html", subcontractors=subcontractors)
- 
-# ---------------- EDIT -----------------
-@subcontractor_bp.route("/edit/<int:id>")
-@login_required
-def edit_subcontractor(id):
-    subcontractor = Subcontractor.query.get_or_404(id)
-    return render_template("subcontractor/edit.html", subcontractor=subcontractor)
- 
-# ---------------- UPDATE -----------------
-@subcontractor_bp.route("/update/<int:id>", methods=["POST"])
-@login_required
-def update_subcontractor(id):
-    subcontractor = Subcontractor.query.get_or_404(id)
-    new_name = request.form.get("subcontractor_name")
- 
-    # Check if the new name is taken by someone ELSE (not this current ID)
-    duplicate = Subcontractor.query.filter(
-        Subcontractor.subcontractor_name == new_name,
-        Subcontractor.id != id
-    ).first()
- 
-    if duplicate:
-        flash("Another subcontractor already uses this name.", "danger")
-        return redirect(f"/subcontractor/edit/{id}")
- 
-    subcontractor.subcontractor_name = new_name
-   
-    db.session.commit()
-   
-    flash("Subcontractor updated successfully!", "success")
-    return redirect("/subcontractor/list")
- 
-# ---------------- DELETE -----------------
-@subcontractor_bp.route("/delete/<int:id>")
-@login_required
-def delete_subcontractor(id):
-    subcontractor = Subcontractor.query.get_or_404(id)
- 
-    db.session.delete(subcontractor)
-    db.session.commit()
- 
-    flash("Subcontractor deleted successfully!", "success")
-    return redirect("/subcontractor/list")
-from flask import Blueprint, render_template, request, redirect, flash
-from app import db
-from app.models.subcontractor_model import Subcontractor
-from app.utils.helpers import login_required
- 
-subcontractor_bp = Blueprint("subcontractor", __name__, url_prefix="/subcontractor")
- 
+
+
 # ---------------- ADD -----------------
 @subcontractor_bp.route("/add")
 @login_required
 def add_subcontractor():
+    current_app.logger.info("Opened Add Subcontractor Page")
     return render_template("subcontractor/add.html")
 
+
+# ---------------- SAVE -----------------
 @subcontractor_bp.route("/save", methods=["POST"])
 @login_required
 def save_subcontractor():
+
     name = request.form.get("subcontractor_name", "").strip()
+
     if not name:
+        current_app.logger.warning("Empty subcontractor name submitted")
         flash("Subcontractor name cannot be empty.", "danger")
-        return redirect("/subcontractor/add")
+        return redirect(url_for("subcontractor.add_subcontractor"))
+
     existing_sub = Subcontractor.query.filter_by(subcontractor_name=name).first()
- 
+
     if existing_sub:
+        current_app.logger.warning(f"Duplicate subcontractor attempt: {name}")
         flash(f"Subcontractor with name '{name}' already exists!", "danger")
-        return redirect("/subcontractor/add")
+        return redirect(url_for("subcontractor.add_subcontractor"))
+
     try:
         subcontractor = Subcontractor(
             subcontractor_name=name,
             contact_person=request.form.get("contact_person"),
+            address=request.form.get("address"),
             mobile_no=request.form.get("mobile_no"),
             email_id=request.form.get("email_id"),
-            gst_no=request.form.get("gst_no")
+            gst_no=request.form.get("gst_no"),
+            pan_no=request.form.get("pan_no")
         )
-       
+
         db.session.add(subcontractor)
         db.session.commit()
+
+        current_app.logger.info(f"Subcontractor Created Successfully: {name}")
         flash("Subcontractor added successfully!", "success")
-       
-    except Exception as e:
+
+    except Exception:
         db.session.rollback()
-        flash("An error occurred while saving. Please try again.", "danger")
- 
-    return redirect("/subcontractor/list")
- 
-# ---------------- LIST -----------------
+        current_app.logger.exception("Error while saving subcontractor")
+        flash("An error occurred while saving.", "danger")
+
+    return redirect(url_for("subcontractor.subcontractor_list"))
+
+
+# ---------------- LIST (UPDATED WITH PAGINATION) -----------------
 @subcontractor_bp.route("/list")
 @login_required
 def subcontractor_list():
-    subcontractors = Subcontractor.query.all()
-    return render_template("subcontractor/list.html", subcontractors=subcontractors)
- 
+
+    page = request.args.get("page", 1, type=int)
+    per_page = 10  # Change how many records per page
+
+    pagination = Subcontractor.query.order_by(
+        Subcontractor.created_at
+    ).paginate(
+        page=page,
+        per_page=per_page,
+        error_out=False
+    )
+
+    subcontractors = pagination.items
+
+    current_app.logger.info(f"Viewed Subcontractor List - Page {page}")
+
+    return render_template(
+        "subcontractor/list.html",
+        subcontractors=subcontractors,
+        pagination=pagination
+    )
+
+
 # ---------------- EDIT -----------------
 @subcontractor_bp.route("/edit/<int:id>")
 @login_required
 def edit_subcontractor(id):
     subcontractor = Subcontractor.query.get_or_404(id)
+    current_app.logger.info(f"Editing Subcontractor ID: {id}")
     return render_template("subcontractor/edit.html", subcontractor=subcontractor)
- 
+
+
 # ---------------- UPDATE -----------------
 @subcontractor_bp.route("/update/<int:id>", methods=["POST"])
 @login_required
 def update_subcontractor(id):
+
     subcontractor = Subcontractor.query.get_or_404(id)
-    new_name = request.form.get("subcontractor_name")
- 
-    # Check if the new name is taken by someone ELSE (not this current ID)
+    new_name = request.form.get("subcontractor_name", "").strip()
+
     duplicate = Subcontractor.query.filter(
         Subcontractor.subcontractor_name == new_name,
         Subcontractor.id != id
     ).first()
- 
+
     if duplicate:
+        current_app.logger.warning(f"Duplicate update attempt: {new_name}")
         flash("Another subcontractor already uses this name.", "danger")
-        return redirect(f"/subcontractor/edit/{id}")
- 
-    subcontractor.subcontractor_name = new_name
-    db.session.commit()
-   
-    flash("Subcontractor updated successfully!", "success")
-    return redirect("/subcontractor/list")
- 
+        return redirect(url_for("subcontractor.edit_subcontractor", id=id))
+
+    try:
+        old_name = subcontractor.subcontractor_name
+
+        subcontractor.subcontractor_name = new_name
+        subcontractor.contact_person = request.form.get("contact_person")
+        subcontractor.address = request.form.get("address")
+        subcontractor.mobile_no = request.form.get("mobile_no")
+        subcontractor.email_id = request.form.get("email_id")
+        subcontractor.gst_no = request.form.get("gst_no")
+        subcontractor.pan_no = request.form.get("pan_no")
+        subcontractor.status = request.form.get("status")
+
+        db.session.commit()
+
+        current_app.logger.info(f"Subcontractor Updated: {old_name} → {new_name}")
+        flash("Subcontractor updated successfully!", "success")
+
+    except Exception:
+        db.session.rollback()
+        current_app.logger.exception("Error updating subcontractor")
+        flash("Update failed!", "danger")
+
+    return redirect(url_for("subcontractor.subcontractor_list"))
+
+
 # ---------------- DELETE -----------------
 @subcontractor_bp.route("/delete/<int:id>")
 @login_required
 def delete_subcontractor(id):
     subcontractor = Subcontractor.query.get_or_404(id)
 
-    db.session.delete(subcontractor)
-    db.session.commit()
+    try:
+        name = subcontractor.subcontractor_name
+        db.session.delete(subcontractor)
+        db.session.commit()
 
-    flash("Subcontractor deleted successfully!", "success")
-    return redirect("/subcontractor/list")
+        current_app.logger.info(f"Subcontractor Deleted: {name}")
+        flash("Subcontractor deleted successfully!", "success")
+
+    except Exception:
+        db.session.rollback()
+        current_app.logger.exception("Error deleting subcontractor")
+        flash("Delete failed!", "danger")
+
+    return redirect(url_for("subcontractor.subcontractor_list"))

app/routes/user.py

@@ -1,11 +1,13 @@
 from flask import Blueprint, render_template
 from app.services.user_service import UserService
 from app.utils.helpers import login_required
+from flask import current_app
 
 user_bp = Blueprint("user", __name__, url_prefix="/user")
 
 @user_bp.route("/list")
 @login_required
 def list_users():
+    current_app.logger.info("User list viewed")
     users = UserService.get_all_users()
-    return render_template("users.html", users=users, title="Users")
+    return render_template("users.html", users=users, title="Users")

app/services/logger_service.py

@@ -0,0 +1,79 @@
+import os
+import logging
+from logging.handlers import RotatingFileHandler
+from flask import request, session, has_request_context
+
+
+class RequestContextFilter(logging.Filter):
+
+    def filter(self, record):
+
+        if has_request_context():
+            record.user = session.get("user_email", "Anonymous")
+            record.ip = request.remote_addr
+            record.method = request.method
+            record.url = request.url
+        else:
+            record.user = "System"
+            record.ip = "N/A"
+            record.method = "N/A"
+            record.url = "N/A"
+
+        return True
+
+
+class LoggerService:
+
+    @staticmethod
+    def init_app(app):
+
+        if not os.path.exists("logs"):
+            os.makedirs("logs")
+
+        formatter = logging.Formatter(
+            "%(asctime)s | %(levelname)s | "
+            "User:%(user)s | IP:%(ip)s | "
+            "Method:%(method)s | URL:%(url)s | "
+            "%(message)s"
+        )
+
+        # INFO LOG
+        info_handler = RotatingFileHandler(
+            "logs/app.log",
+            maxBytes=5 * 1024 * 1024,
+            backupCount=5
+        )
+        info_handler.setLevel(logging.INFO)
+        info_handler.setFormatter(formatter)
+
+        # ERROR LOG
+        error_handler = RotatingFileHandler(
+            "logs/error.log",
+            maxBytes=5 * 1024 * 1024,
+            backupCount=5
+        )
+        error_handler.setLevel(logging.ERROR)
+        error_handler.setFormatter(formatter)
+
+        # CONSOLE
+        console_handler = logging.StreamHandler()
+        console_handler.setLevel(logging.DEBUG)
+        console_handler.setFormatter(formatter)
+
+        # 🔹 ADD FILTER (important)
+        context_filter = RequestContextFilter()
+
+        info_handler.addFilter(context_filter)
+        error_handler.addFilter(context_filter)
+        console_handler.addFilter(context_filter)
+
+        app.logger.setLevel(logging.DEBUG)
+
+        app.logger.addHandler(info_handler)
+        app.logger.addHandler(error_handler)
+        app.logger.addHandler(console_handler)
+
+        # Log every request automatically
+        @app.before_request
+        def log_request():
+            app.logger.info("Request Started")

app/templates/client_report.html

@@ -29,20 +29,25 @@
         <ul class="nav nav-tabs" id="reportTabs" role="tablist">
             <li class="nav-item">
                 <button class="nav-link active" id="tr-tab" data-bs-toggle="tab" data-bs-target="#tr"
-                    type="button">Tr.Ex Comparison</button>
+                    type="button">Tr.Ex </button>
             </li>
             <li class="nav-item">
                 <button class="nav-link" id="mh-tab" data-bs-toggle="tab" data-bs-target="#mh" type="button">Mh.Ex
-                    Comparison</button>
+                    </button>
             </li>
             <li class="nav-item">
                 <button class="nav-link" id="dc-tab" data-bs-toggle="tab" data-bs-target="#dc" type="button">MH & DC
-                    Comparison</button>
+                    </button>
             </li>
             <li class="nav-item">
+<<<<<<< HEAD
                 <button class="nav-link" id="laying-tab" data-bs-toggle="tab" data-bs-target="#laying"
                     type="button">Laying
                     & Bedding Comparison</button>
+=======
+                <button class="nav-link" id="laying-tab" data-bs-toggle="tab" data-bs-target="#laying" type="button">Laying
+                    & Bedding </button>
+>>>>>>> 1dceb640bd930c37888799f10f02fe90b219be67
         </ul>
 
         <div class="tab-content mt-3" id="reportTabsContent">
@@ -71,4 +76,5 @@
         {% endif %}
 
     </div>
-    {% endblock %}
+</div>
+{% endblock %}

app/templates/dashboard.html

@@ -2,7 +2,7 @@
 
 {% block content %}
 <div class="container-fluid px-2 px-md-4">
-    <h4 class="mb-3 text-center text-md-start">Comparison dSoftware Solapur (UGD) - Live Dashboard</h4>
+    <h4 class="mb-3 text-center text-md-start">Comparison Software Solapur (UGD) - Live Dashboard</h4>
 
     <div class="row g-3 mb-4">
         <div class="col-12 col-md-4">

app/templates/subcontractor/add.html

@@ -2,39 +2,49 @@
 {% block content %}
 
 <div class="card shadow-sm p-4">
-
     <h4 class="mb-3">Add New Subcontractor</h4>
 
-    <form action="/subcontractor/save" method="POST">
+    <form action="{{ url_for('subcontractor.save_subcontractor') }}" method="POST">
 
         <div class="mb-3">
-            <label class="form-label">Subcontractor Name</label>
+            <label class="form-label">Subcontractor Name:</label>
             <input type="text" class="form-control" name="subcontractor_name" required>
         </div>
 
         <div class="mb-3">
-            <label class="form-label">Contact Person Name</label>
+            <label class="form-label">Contact Person Name:</label>
             <input type="text" class="form-control" name="contact_person">
         </div>
 
         <div class="mb-3">
-            <label class="form-label">Mobile</label>
+            <label class="form-label">Address:</label>
+            <textarea type="text" class="form-control" name="address"></textarea>
+        </div>
+
+        <div class="mb-3">
+            <label class="form-label">Mobile No:</label>
             <input type="text" class="form-control" name="mobile_no">
         </div>
 
         <div class="mb-3">
-            <label class="form-label">Email</label>
+            <label class="form-label">Email:</label>
             <input type="email" class="form-control" name="email_id">
         </div>
 
         <div class="mb-3">
-            <label class="form-label">GST No</label>
+            <label class="form-label">GST No:</label>
             <input type="text" class="form-control" name="gst_no">
         </div>
 
-        <button class="btn btn-success">Save</button>
-    </form>
+        <div class="mb-3">
+            <label class="form-label">PAN No:</label>
+            <input type="text" class="form-control" name="pan_no">
+        </div>
 
+        <button class="btn btn-success">Save</button>
+        <a href="{{ url_for('subcontractor.subcontractor_list') }}" class="btn btn-secondary">Back</a>
+
+    </form>
 </div>
 
 {% endblock %}

app/templates/subcontractor/edit.html

@@ -4,36 +4,58 @@
 <div class="card shadow-sm p-4">
     <h4 class="mb-3">Edit Subcontractor</h4>
 
-    <form action="/subcontractor/update/{{ subcontractor.id }}" method="POST">
+    <form action="{{ url_for('subcontractor.update_subcontractor', id=subcontractor.id) }}" method="POST">
 
         <div class="mb-3">
-            <label class="form-label">Subcontractor Name</label>
+            <label class="form-label">Subcontractor Name:</label>
             <input type="text" class="form-control" name="subcontractor_name"
                 value="{{ subcontractor.subcontractor_name }}" required>
         </div>
 
         <div class="mb-3">
-            <label class="form-label">Contact Person</label>
+            <label class="form-label">Contact Person Name:</label>
             <input type="text" class="form-control" name="contact_person" value="{{ subcontractor.contact_person }}">
         </div>
 
         <div class="mb-3">
-            <label class="form-label">Mobile</label>
+            <label class="form-label">Address:</label>
+            <input type="text" class="form-control" name="address" value="{{ subcontractor.address }}">
+        </div>
+
+        <div class="mb-3">
+            <label class="form-label">Mobile No:</label>
             <input type="text" class="form-control" name="mobile_no" value="{{ subcontractor.mobile_no }}">
         </div>
 
         <div class="mb-3">
-            <label class="form-label">Email</label>
+            <label class="form-label">Email:</label>
             <input type="email" class="form-control" name="email_id" value="{{ subcontractor.email_id }}">
         </div>
 
         <div class="mb-3">
-            <label class="form-label">GST No</label>
+            <label class="form-label">GST No:</label>
             <input type="text" class="form-control" name="gst_no" value="{{ subcontractor.gst_no }}">
         </div>
 
+        <div class="mb-3">
+            <label class="form-label">PAN No:</label>
+            <input type="text" class="form-control" name="pan_no" value="{{ subcontractor.pan_no }}">
+        </div>
+
+        <div class="mb-3">
+            <label class="form-label">Status:</label>
+            <select name="status" class="form-control">
+                <option value="Active" {% if subcontractor.status=="Active" %}selected{% endif %}>
+                    Active
+                </option>
+                <option value="Inactive" {% if subcontractor.status=="Inactive" %}selected{% endif %}>
+                    Inactive
+                </option>
+            </select>
+        </div>
+
         <button class="btn btn-success">Update</button>
-        <a href="/subcontractor/list" class="btn btn-secondary">Back</a>
+        <a href="{{ url_for('subcontractor.subcontractor_list') }}" class="btn btn-secondary">Back</a>
 
     </form>
 </div>

app/templates/subcontractor/list.html

@@ -1,89 +1,160 @@
 {% extends "base.html" %}
 {% block content %}
 
-<div class="card shadow-sm p-3 p-md-4">
+<div class="container mt-4">
 
-    <!-- Header -->
-    <div class="row mb-3 align-items-center">
-        <div class="col-12 col-md-6 ">
-            <h4 class="mb-2 mb-md-0 text-center text-md-start">
-                Subcontractor List
-            </h4>
-        </div>
+    <div class="d-flex flex-column flex-md-row justify-content-between align-items-md-center mb-3">
+        <h4 class="mb-3 mb-md-0">Subcontractor List</h4>
 
-        <div class="col-12 col-md-3 text-center text-md-end">
-            <a href="/subcontractor/add" class="btn btn-success w-100 w-md-auto">
-                ➕ Add Subcontractor
-            </a>
-        </div>
+        <a href="{{ url_for('subcontractor.add_subcontractor') }}" class="btn btn-primary btn-sm">
+            + Add Subcontractor
+        </a>
     </div>
 
+    <div class="card shadow-sm">
+        <div class="card-body p-2 p-md-3">
 
-    <div class="table-responsive">
-        <table class="table table-bordered table-striped align-middle text-nowrap">
-            <thead class="table-dark">
-                <tr>
-                    <th>ID</th>
-                    <th>Name</th>
-                    <th class="d-none d-md-table-cell">Mobile</th>
-                    <th class="d-none d-lg-table-cell">Email</th>
-                    <th class="d-none d-lg-table-cell">GST No</th>
-                    <th class="text-center">Action</th>
-                </tr>
-            </thead>
+            <!-- Desktop Table View -->
+            <div class="table-responsive d-none d-md-block">
+                <table class="table table-bordered table-hover align-middle">
+                    <thead class="table-dark">
+                        <tr>
+                            <th>Sr. No</th>
+                            <th>Subcontractor Name</th>
+                            <th>GST No</th>
+                            <th>Mobile</th>
+                            <th>Email</th>
+                            <th>Status</th>
+                            <th width="150">Action</th>
+                        </tr>
+                    </thead>
+                    <tbody>
+                        {% for s in subcontractors %}
+                        <tr>
+                            <td>{{ s.id }}</td>
+                            <td>{{ s.subcontractor_name }}</td>
+                            <td>{{ s.gst_no }}</td>
+                            <td>{{ s.mobile_no }}</td>
+                            <td>{{ s.email_id }}</td>
+                            <td>
+                                {% if s.status == "Active" %}
+                                <span class="badge bg-success">Active</span>
+                                {% else %}
+                                <span class="badge bg-danger">Inactive</span>
+                                {% endif %}
+                            </td>
+                            <td>
+                                <a href="{{ url_for('subcontractor.edit_subcontractor', id=s.id) }}"
+                                    class="btn btn-sm btn-warning mb-1">
+                                    Edit
+                                </a>
 
-            <tbody>
+                                <a href="{{ url_for('subcontractor.delete_subcontractor', id=s.id) }}"
+                                    class="btn btn-sm btn-danger" onclick="return confirm('Are you sure to delete?')">
+                                    Delete
+                                </a>
+                            </td>
+                        </tr>
+                        {% endfor %}
+                    </tbody>
+                </table>
+            </div>
+
+            <!-- Mobile Card View -->
+            <div class="d-md-none">
                 {% for s in subcontractors %}
-                <tr>
-                    <td>{{ s.id }}</td>
+                <div class="card mb-3 shadow-sm">
+                    <div class="card-body p-3">
+                        <h5 class="fw-bold mb-2">{{ s.subcontractor_name }}</h5>
 
-                    <td class="fw-semibold text-wrap">
-                        {{ s.subcontractor_name }}
-                    </td>
+                        <p class="mb-1"><strong>GST No:</strong> {{ s.gst_no }}</p>
+                        <p class="mb-1"><strong>Mobile:</strong> {{ s.mobile_no }}</p>
+                        <p class="mb-1"><strong>Email:</strong> {{ s.email_id }}</p>
 
-                    <td class="d-none d-md-table-cell">
-                        {{ s.mobile_no }}
-                    </td>
+                        <p class="mb-2">
+                            <strong>Status:</strong>
+                            {% if s.status == "Active" %}
+                            <span class="badge bg-success">Active</span>
+                            {% else %}
+                            <span class="badge bg-danger">Inactive</span>
+                            {% endif %}
+                        </p>
 
-                    <td class="d-none d-lg-table-cell">
-                        {{ s.email_id }}
-                    </td>
-
-                    <td class="d-none d-lg-table-cell">
-                        {{ s.gst_no }}
-                    </td>
-
-                    <!-- Action Buttons -->
-                    <td class="text-center">
-                        <div class="d-flex flex-column gap-1">
-                            <a href="/subcontractor/edit/{{ s.id }}" class="btn btn-sm btn-warning">
+                        <div class="d-flex gap-2">
+                            <a href="{{ url_for('subcontractor.edit_subcontractor', id=s.id) }}"
+                                class="btn btn-sm btn-warning w-50">
                                 Edit
                             </a>
-                            <a href="/subcontractor/delete/{{ s.id }}" class="btn btn-sm btn-danger"
-                                onclick="return confirm('Are you sure?')">
+
+                            <a href="{{ url_for('subcontractor.delete_subcontractor', id=s.id) }}"
+                                class="btn btn-sm btn-danger w-50" onclick="return confirm('Are you sure to delete?')">
                                 Delete
                             </a>
                         </div>
-                    </td>
-                </tr>
+                    </div>
+                </div>
                 {% endfor %}
-            </tbody>
+            </div>
 
-            <!-- TOTAL ROW -->
-            <tfoot>
-                <tr class="table-secondary fw-bold">
-                    <td colspan="2" class="text-end"> Total Subcontractors</td>
+            <!-- Pagination -->
+            <nav>
+                <ul class="pagination justify-content-center flex-wrap mt-4">
 
-                    <td class="d-none d-lg-table-cell">-</td>
-                    <td class="d-none d-lg-table-cell">-</td>
-                    <td class="d-none d-lg-table-cell">-</td>
+                    {% if pagination.has_prev %}
+                    <li class="page-item">
+                        <a class="page-link" href="{{ url_for('subcontractor.subcontractor_list', page=1) }}">
+                            First
+                        </a>
+                    </li>
 
-                    <td class="text-center">{{ subcontractors|length }}</td>
+                    <li class="page-item">
+                        <a class="page-link"
+                            href="{{ url_for('subcontractor.subcontractor_list', page=pagination.prev_num) }}">
+                            Prev
+                        </a>
+                    </li>
+                    {% endif %}
 
-                </tr>
-            </tfoot>
+                    {% for page_num in pagination.iter_pages() %}
+                    {% if page_num %}
+                    {% if page_num != pagination.page %}
+                    <li class="page-item">
+                        <a class="page-link" href="{{ url_for('subcontractor.subcontractor_list', page=page_num) }}">
+                            {{ page_num }}
+                        </a>
+                    </li>
+                    {% else %}
+                    <li class="page-item active">
+                        <span class="page-link">{{ page_num }}</span>
+                    </li>
+                    {% endif %}
+                    {% else %}
+                    <li class="page-item disabled">
+                        <span class="page-link">...</span>
+                    </li>
+                    {% endif %}
+                    {% endfor %}
 
-        </table>
+                    {% if pagination.has_next %}
+                    <li class="page-item">
+                        <a class="page-link"
+                            href="{{ url_for('subcontractor.subcontractor_list', page=pagination.next_num) }}">
+                            Next
+                        </a>
+                    </li>
+
+                    <li class="page-item">
+                        <a class="page-link"
+                            href="{{ url_for('subcontractor.subcontractor_list', page=pagination.pages) }}">
+                            Last
+                        </a>
+                    </li>
+                    {% endif %}
+
+                </ul>
+            </nav>
+
+        </div>
     </div>
 
 </div>

app/templates/subcontractor_dashboard.html

@@ -1,29 +1,105 @@
 {% extends "base.html" %}
-
 {% block content %}
 
-<div class="container-fluid px-2 px-md-4">
+<div class="container-fluid mt-3">
 
-    <h4 class="mb-3 text-center text-md-start">Subcontractor Dashboard </h4>
+    <h4 class="mb-4">Subcontractor Dashboard</h4>
 
-    <!-- Charts -->
-    <div class="row g-3">
+    <div class="row mb-3">
 
-        <!-- Bar Chart -->
-        <div class="col-12 col-md-6">
-            <div class="card shadow-sm h-100">
-                <div class="card-header bg-dark text-white text-center text-md-start">
-                    Work Category Bar Chart
-                </div>
-                <div class="card-body text-center">
-                    <img src="data:image/png;base64,{{ bar_chart }}" class="img-fluid" style="max-height:300px;">
-                </div>
-            </div>
+        <div class="col-md-4">
+            <select id="subcontractor" class="form-control">
+                <option value="">Select Subcontractor</option>
+
+                {% for s in subcontractors %}
+                <option value="{{s.id}}">{{s.subcontractor_name}}</option>
+                {% endfor %}
+
+            </select>
         </div>
 
+        <div class="col-md-4">
+            <select id="category" class="form-control">
+                <option value="">Select Category</option>
+                <option value="Soft Murum">Soft Murum</option>
+                <option value="Hard Murum">Hard Murum</option>
+                <option value="Soft Rock">Soft Rock</option>
+                <option value="Hard Rock">Hard Rock</option>
+            </select>
+        </div>
 
+        <div class="col-md-4">
+            <select id="ra_bill" class="form-control">
+                <option value="">RA Bill</option>
+            </select>
+        </div>
+
+    </div>
+
+
+    <div class="card shadow">
+        <div class="card-body">
+
+            <canvas id="comparisonChart" height="120"></canvas>
+
+        </div>
     </div>
 
 </div>
 
+
+<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
+
+<script>
+
+    let chart;
+
+    function loadChart() {
+
+        let subcontractor = document.getElementById("subcontractor").value
+        let category = document.getElementById("category").value
+        let ra_bill = document.getElementById("ra_bill").value
+
+
+        fetch(`/dashboard/api/subcontractor-chart?subcontractor=${subcontractor}&category=${category}&ra_bill=${ra_bill}`)
+
+            .then(res => res.json())
+            .then(data => {
+
+                if (chart) {
+                    chart.destroy()
+                }
+
+                const ctx = document.getElementById("comparisonChart")
+
+                chart = new Chart(ctx, {
+                    type: "bar",
+                    data: {
+                        labels: data.labels,
+                        datasets: [{
+                            label: "Subcontractor Quantity",
+                            data: data.values,
+                            backgroundColor: "#0d6efd"
+                        }]
+                    },
+                    options: {
+                        responsive: true,
+                        plugins: {
+                            legend: { display: true }
+                        }
+                    }
+                })
+
+            })
+
+    }
+
+    document.getElementById("subcontractor").addEventListener("change", loadChart)
+    document.getElementById("category").addEventListener("change", loadChart)
+    document.getElementById("ra_bill").addEventListener("change", loadChart)
+
+    loadChart()
+
+</script>
+
 {% endblock %}

app/utils/exceptions.py

@@ -0,0 +1,8 @@
+from app.constants.http_status import HTTPStatus
+
+class APIException(Exception):
+    def __init__(self, message, status_code=HTTPStatus.BAD_REQUEST, errors=None):
+        self.message = message
+        self.status_code = status_code
+        self.errors = errors
+        super().__init__(self.message)

app/utils/file_utils.py

@@ -1,6 +1,16 @@
 import os
+from flask import current_app
 from app.config import Config
 
+
+def get_download_format_folder():
+    return os.path.join(
+        current_app.root_path,
+        "static",
+        "downloads",
+        "format"
+    )
+
 def ensure_upload_folder():
     if not os.path.exists(Config.UPLOAD_FOLDER):
-        os.makedirs(Config.UPLOAD_FOLDER)
+        os.makedirs(Config.UPLOAD_FOLDER)

app/utils/regex_utils.py

@@ -0,0 +1,12 @@
+import re
+
+class RegularExpression:
+
+    # sum fields of TrEx, MhEx (_total)
+    STR_TOTAL_PATTERN = re.compile(r".*_total$")
+
+    # sum fields  of pipe laying (pipe_150_mm)
+    PIPE_MM_PATTERN = re.compile(r"^pipe_\d+_mm$")
+
+    # sum fields of MH dc (d_0_to_0_75)
+    D_RANGE_PATTERN = re.compile( r"^d_\d+(?:_\d+)?_to_\d+(?:_\d+)?$") 

app/utils/response_handler.py

@@ -0,0 +1,23 @@
+from flask import jsonify
+from app.constants.http_status import HTTPStatus
+
+
+class ResponseHandler:
+
+    @staticmethod
+    def success(message, data=None, status_code=HTTPStatus.OK):
+        return jsonify({
+            "status": "success",
+            "message": message,
+            "data": data if data else {},
+            "errors": []
+        }), status_code
+
+    @staticmethod
+    def error(message, errors=None, status_code=HTTPStatus.BAD_REQUEST):
+        return jsonify({
+            "status": "error",
+            "message": message,
+            "data": {},
+            "errors": errors if errors else []
+        }), status_code