feat: Update GlobalProjectModel and ProjectModel to handle nullable date fields and improve JSON parsing

lib/model/global_project_model.dart

@@ -3,8 +3,8 @@ final String id;
   final String name;
   final String projectAddress;
   final String contactPerson;
-final DateTime startDate;
+  final DateTime? startDate;
-final DateTime endDate;
+  final DateTime? endDate;
   final int teamSize;
   final String projectStatusId;
   final String? tenantId;
@@ -14,8 +14,8 @@ required this.id,
     required this.name,
     required this.projectAddress,
     required this.contactPerson,
-required this.startDate,
+    this.startDate,
-required this.endDate,
+    this.endDate,
     required this.teamSize,
     required this.projectStatusId,
     this.tenantId,
@@ -27,9 +27,11 @@ id: json['id'] ?? '',
       name: json['name'] ?? '',
       projectAddress: json['projectAddress'] ?? '',
       contactPerson: json['contactPerson'] ?? '',
-startDate: DateTime.parse(json['startDate']),
+      startDate: _parseDate(json['startDate']),
-endDate: DateTime.parse(json['endDate']),
+      endDate: _parseDate(json['endDate']),
-teamSize: json['teamSize'] ?? 0, // ✅ SAFER
+      teamSize: json['teamSize'] is int
+          ? json['teamSize']
+          : int.tryParse(json['teamSize']?.toString() ?? '0') ?? 0,
       projectStatusId: json['projectStatusId'] ?? '',
       tenantId: json['tenantId'],
     );
@@ -41,11 +43,23 @@ return {
       'name': name,
       'projectAddress': projectAddress,
       'contactPerson': contactPerson,
-'startDate': startDate.toIso8601String(),
+      'startDate': startDate?.toIso8601String(),
-'endDate': endDate.toIso8601String(),
+      'endDate': endDate?.toIso8601String(),
       'teamSize': teamSize,
       'projectStatusId': projectStatusId,
       'tenantId': tenantId,
     };
   }
+
+  static DateTime? _parseDate(dynamic value) {
+    if (value == null || value.toString().trim().isEmpty) {
+      return null;
+    }
+    try {
+      return DateTime.parse(value.toString());
+    } catch (e) {
+      print('⚠️ Failed to parse date "$value": $e');
+      return null;
+    }
+  }
 }

lib/model/project_model.dart

@@ -3,8 +3,8 @@ class ProjectModel {
   final String name;
   final String projectAddress;
   final String contactPerson;
-  final DateTime startDate;
+  final DateTime? startDate;
-  final DateTime endDate;
+  final DateTime? endDate;
   final int teamSize;
   final double completedWork;
   final double plannedWork;
@@ -16,8 +16,8 @@ class ProjectModel {
     required this.name,
     required this.projectAddress,
     required this.contactPerson,
-    required this.startDate,
+    this.startDate,
-    required this.endDate,
+    this.endDate,
     required this.teamSize,
     required this.completedWork,
     required this.plannedWork,
@@ -25,36 +25,30 @@ class ProjectModel {
     this.tenantId,
   });
 
-  // Factory method to create an instance of ProjectModel from a JSON object
   factory ProjectModel.fromJson(Map<String, dynamic> json) {
     return ProjectModel(
-      id: json['id'],
+      id: json['id']?.toString() ?? '',
-      name: json['name'],
+      name: json['name']?.toString() ?? '',
-      projectAddress: json['projectAddress'],
+      projectAddress: json['projectAddress']?.toString() ?? '',
-      contactPerson: json['contactPerson'],
+      contactPerson: json['contactPerson']?.toString() ?? '',
-      startDate: DateTime.parse(json['startDate']),
+      startDate: _parseDate(json['startDate']),
-      endDate: DateTime.parse(json['endDate']),
+      endDate: _parseDate(json['endDate']),
-      teamSize: json['teamSize'],
+      teamSize: _parseInt(json['teamSize']),
-      completedWork: json['completedWork'] != null
+      completedWork: _parseDouble(json['completedWork']),
-          ? (json['completedWork'] as num).toDouble()
+      plannedWork: _parseDouble(json['plannedWork']),
-          : 0.0,
+      projectStatusId: json['projectStatusId']?.toString() ?? '',
-      plannedWork: json['plannedWork'] != null
+      tenantId: json['tenantId']?.toString(),
-          ? (json['plannedWork'] as num).toDouble()
-          : 0.0,
-      projectStatusId: json['projectStatusId'],
-      tenantId: json['tenantId'],
     );
   }
 
-  // Method to convert the ProjectModel instance back to a JSON object
   Map<String, dynamic> toJson() {
     return {
       'id': id,
       'name': name,
       'projectAddress': projectAddress,
       'contactPerson': contactPerson,
-      'startDate': startDate.toIso8601String(),
+      'startDate': startDate?.toIso8601String(),
-      'endDate': endDate.toIso8601String(),
+      'endDate': endDate?.toIso8601String(),
       'teamSize': teamSize,
       'completedWork': completedWork,
       'plannedWork': plannedWork,
@@ -62,4 +56,30 @@ class ProjectModel {
       'tenantId': tenantId,
     };
   }
+
+  // ---------- Helpers ----------
+
+  static DateTime? _parseDate(dynamic value) {
+    if (value == null || value.toString().trim().isEmpty) {
+      return null;
+    }
+    try {
+      return DateTime.parse(value.toString());
+    } catch (e) {
+      print('⚠️ Failed to parse date: $value');
+      return null;
+    }
+  }
+
+  static int _parseInt(dynamic value) {
+    if (value == null) return 0;
+    if (value is int) return value;
+    return int.tryParse(value.toString()) ?? 0;
+  }
+
+  static double _parseDouble(dynamic value) {
+    if (value == null) return 0.0;
+    if (value is num) return value.toDouble();
+    return double.tryParse(value.toString()) ?? 0.0;
+  }
 }