feat: sales analytic

lib/domain/analytic/analytic.dart

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+import 'package:freezed_annotation/freezed_annotation.dart';
+
+import '../../common/api/api_failure.dart';
+
+part 'analytic.freezed.dart';
+
+part 'entities/sales_analytic_entity.dart';
+part 'failures/analytic_failure.dart';

lib/domain/analytic/entities/sales_analytic_entity.dart

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+part of '../analytic.dart';
+
+@freezed
+class SalesAnalytic with _$SalesAnalytic {
+  const factory SalesAnalytic({
+    required String organizationId,
+    required String outletId,
+    required DateTime dateFrom,
+    required DateTime dateTo,
+    required String groupBy,
+    required SalesAnalyticSummary summary,
+    required List<SalesAnalyticData> data,
+  }) = _SalesAnalytic;
+
+  factory SalesAnalytic.empty() => SalesAnalytic(
+    organizationId: '',
+    outletId: '',
+    dateFrom: DateTime.fromMillisecondsSinceEpoch(0),
+    dateTo: DateTime.fromMillisecondsSinceEpoch(0),
+    groupBy: '',
+    summary: SalesAnalyticSummary.empty(),
+    data: [],
+  );
+}
+
+@freezed
+class SalesAnalyticSummary with _$SalesAnalyticSummary {
+  const factory SalesAnalyticSummary({
+    required int totalSales,
+    required int totalOrders,
+    required int totalItems,
+    required double averageOrderValue,
+    required int totalTax,
+    required int totalDiscount,
+    required int netSales,
+  }) = _SalesAnalyticSummary;
+
+  factory SalesAnalyticSummary.empty() => const SalesAnalyticSummary(
+    totalSales: 0,
+    totalOrders: 0,
+    totalItems: 0,
+    averageOrderValue: 0,
+    totalTax: 0,
+    totalDiscount: 0,
+    netSales: 0,
+  );
+}
+
+@freezed
+class SalesAnalyticData with _$SalesAnalyticData {
+  const factory SalesAnalyticData({
+    required DateTime date,
+    required int sales,
+    required int orders,
+    required int items,
+    required int tax,
+    required int discount,
+    required int netSales,
+  }) = _SalesAnalyticData;
+
+  factory SalesAnalyticData.empty() => SalesAnalyticData(
+    date: DateTime.fromMillisecondsSinceEpoch(0),
+    sales: 0,
+    orders: 0,
+    items: 0,
+    tax: 0,
+    discount: 0,
+    netSales: 0,
+  );
+}

lib/domain/analytic/failures/analytic_failure.dart

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+part of '../analytic.dart';
+
+@freezed
+sealed class AnalyticFailure with _$AnalyticFailure {
+  const factory AnalyticFailure.serverError(ApiFailure failure) = _ServerError;
+  const factory AnalyticFailure.unexpectedError() = _UnexpectedError;
+  const factory AnalyticFailure.empty() = _Empty;
+  const factory AnalyticFailure.dynamicErrorMessage(String erroMessage) =
+      _DynamicErrorMessage;
+}

lib/domain/analytic/repositories/i_analytic_repository.dart

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+import 'package:dartz/dartz.dart';
+
+import '../analytic.dart';
+
+abstract class IAnalyticRepository {
+  Future<Either<AnalyticFailure, SalesAnalytic>> getSales({
+    required DateTime dateFrom,
+    required DateTime dateTo,
+  });
+}