feat: managing returns

lib/data/repositories/bal_repository.dart

@@ -1,5 +1,8 @@
 import 'package:seshat/data/services/api_client.dart';
+import 'package:seshat/domain/models/accounting.dart';
 import 'package:seshat/domain/models/bal.dart';
+import 'package:seshat/domain/models/bal_stats.dart';
+import 'package:seshat/domain/models/enums.dart';
 import 'package:seshat/utils/result.dart';
 
 class BalRepository {
@@ -7,6 +10,7 @@ class BalRepository {
 
   final ApiClient _apiClient;
   List<Bal>? _bals;
+  Accounting? accounting;
 
   Future<Result<List<Bal>>> getBals() async {
     if (_bals != null) {
@@ -95,4 +99,71 @@ class BalRepository {
     await _getBalsNoCache();
     return result;
   }
+
+  Future<Result<BalStats>> getBalStats(int id) async {
+    return _apiClient.getBalStats(id);
+  }
+
+  Future<Result<Accounting>> getAccountingNoCache(int balId) async {
+    final result = await _apiClient.getAccounting(balId);
+    switch (result) {
+      case Ok():
+        accounting = result.value;
+        break;
+      default:
+    }
+    return result;
+  }
+
+  Future<Result<Accounting>> getAccounting(int balId) async {
+    if (accounting != null) {
+      return Result.ok(accounting!);
+    }
+    final result = await _apiClient.getAccounting(balId);
+    switch (result) {
+      case Ok():
+        accounting = result.value;
+        break;
+      default:
+    }
+    return result;
+  }
+
+  Future<Result<void>> returnToId(
+    int balId,
+    int ownerId,
+    ReturnType type,
+  ) async {
+    final result = await _apiClient.returnToId(balId, ownerId, type.name);
+    switch (result) {
+      case Ok():
+        switch (type) {
+          case ReturnType.books:
+            final owner = accounting?.owners
+                .where((el) => el.ownerId == ownerId)
+                .firstOrNull;
+            if (owner?.owedMoney == 0) {
+              accounting?.owners.removeWhere((el) => el.ownerId == ownerId);
+            }
+            owner?.owed = [];
+            owner?.owedInstances = [];
+            break;
+          case ReturnType.money:
+            final owner = accounting?.owners
+                .where((el) => el.ownerId == ownerId)
+                .firstOrNull;
+            if (owner?.owed == null || owner!.owed.isEmpty) {
+              accounting?.owners.removeWhere((el) => el.ownerId == ownerId);
+            }
+            owner?.owedMoney = 0;
+            break;
+          case ReturnType.all:
+            accounting?.owners.removeWhere((el) => el.ownerId == ownerId);
+            break;
+        }
+        break;
+      default:
+    }
+    return result;
+  }
 }

lib/data/services/api_client.dart

@@ -1,10 +1,14 @@
 import 'dart:convert';
+import 'dart:math';
 
+import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 import 'package:flutter_secure_storage/flutter_secure_storage.dart';
 import 'package:http/http.dart';
 import 'package:seshat/config/constants.dart';
+import 'package:seshat/domain/models/accounting.dart';
 import 'package:seshat/domain/models/bal.dart';
+import 'package:seshat/domain/models/bal_stats.dart';
 import 'package:seshat/domain/models/book.dart';
 import 'package:seshat/domain/models/book_instance.dart';
 import 'package:seshat/domain/models/owner.dart';
@@ -12,6 +16,12 @@ import 'package:seshat/domain/models/search_result.dart';
 import 'package:seshat/utils/command.dart';
 import 'package:seshat/utils/result.dart';
 
+extension StringExtension on String {
+  String capitalize() {
+    return "${this[0].toUpperCase()}${this.substring(1).toLowerCase()}";
+  }
+}
+
 typedef AuthHeaderProvider = String? Function();
 
 class ApiClient {
@@ -37,12 +47,86 @@ class ApiClient {
     return headers;
   }
 
+  /*
+ * ========================
+ * =====< Accounting >=====
+ * ========================
+*/
+
+  Future<Result<Accounting>> getAccounting(int balId) async {
+    final client = Client();
+    try {
+      final headers = await _getHeaders();
+      final response = await client.get(
+        Uri.parse("https://$apiBasePath/bal/$balId/accounting"),
+        headers: headers,
+      );
+      if (response.statusCode == 200) {
+        final json = jsonDecode(response.body);
+        return Result.ok(Accounting.fromJSON(json));
+      } else {
+        throw "Unknown error";
+      }
+    } catch (e) {
+      return Result.error(Exception(e));
+    } finally {
+      client.close();
+    }
+  }
+
+  Future<Result<void>> returnToId(int balId, int ownerId, String type) async {
+    final client = Client();
+    try {
+      final headers = await _getHeaders({"Content-Type": "application/json"});
+      final body = jsonEncode({"return_type": type.capitalize()});
+      debugPrint(body);
+      final response = await client.post(
+        Uri.parse(
+          "https://$apiBasePath/bal/${balId.toString()}/accounting/return/${ownerId.toString()}",
+        ),
+        headers: headers,
+        body: body,
+      );
+      if (response.statusCode == 200) {
+        return Result.ok(response);
+      } else {
+        throw "Unknown error ${response.statusCode.toString()}";
+      }
+    } catch (e) {
+      debugPrint(e.toString());
+      return Result.error(Exception(e));
+    } finally {
+      client.close();
+    }
+  }
+
   /*
  * =================
  * =====[ BAL ]=====
  * =================
 */
 
+  Future<Result<BalStats>> getBalStats(int id) async {
+    final client = Client();
+    try {
+      final headers = await _getHeaders();
+      final response = await client.get(
+        Uri.parse("https://$apiBasePath/bal/${id.toString()}/stats"),
+        headers: headers,
+      );
+      if (response.statusCode == 200) {
+        final json = jsonDecode(response.body);
+        return Result.ok(BalStats.fromJSON(json));
+      } else {
+        throw "Unknown error";
+      }
+    } catch (e) {
+      return Result.error(Exception(e));
+    } finally {
+      client.close();
+    }
+  }
+
   Future<Result<Bal>> stopBal(int id) async {
     final client = Client();
     try {