feat: managing returns

lib/domain/models/accounting.dart

@@ -0,0 +1,20 @@
+import 'package:seshat/domain/models/book.dart';
+import 'package:seshat/domain/models/return_owner.dart';
+
+class Accounting {
+  Accounting(this.owners, this.books);
+  List<ReturnOwner> owners;
+  Map<String, Book> books;
+
+  factory Accounting.fromJSON(Map<String, dynamic> json) {
+    final ownersJson = json["owners"] as List<dynamic>;
+    List<ReturnOwner> owners = ownersJson
+        .map((el) => ReturnOwner.fromJSON(el))
+        .toList();
+
+    final booksJson = json["book_map"] as Map<String, dynamic>;
+    Map<String, Book> books = {};
+    booksJson.forEach((k, v) => books[k] = Book.fromJSON(v));
+    return Accounting(owners, books);
+  }
+}

lib/domain/models/bal_stats.dart

@@ -0,0 +1,28 @@
+class BalStats {
+  BalStats(
+    this.totalOwnedCollectedMoney,
+    this.totalDifferentOwners,
+    this.totalCollectedMoney,
+    this.balId,
+    this.totalSoldBooks,
+    this.totalOwnedSoldBooks,
+  );
+
+  int balId;
+  double totalCollectedMoney;
+  double totalOwnedCollectedMoney;
+  int totalDifferentOwners;
+  int totalSoldBooks;
+  int totalOwnedSoldBooks;
+
+  factory BalStats.fromJSON(Map<String, dynamic> json) {
+    return BalStats(
+      json["total_owned_collected_money"],
+      json["total_different_owners"],
+      json["total_collected_money"],
+      json["bal_id"],
+      json["total_sold_books"],
+      json["total_owned_sold_books"],
+    );
+  }
+}

lib/domain/models/enums.dart

@@ -0,0 +1 @@
+enum ReturnType { books, money, all }

lib/domain/models/return_owner.dart

@@ -1,11 +1,22 @@
 import 'package:seshat/domain/models/book_instance.dart';
 import 'package:seshat/domain/models/owner.dart';
+import 'package:seshat/domain/models/search_result.dart';
 
 class ReturnOwner {
-  ReturnOwner(this.owner, this.owned, this.ownedMoney);
-  Owner owner;
-  List<BookInstance> owned;
-  double ownedMoney;
+  ReturnOwner(this.ownerId, this.owedInstances, this.owedMoney);
+  int ownerId;
+  Owner? owner;
+  List<BookInstance> owedInstances;
+  List<SearchResult> owed = [];
+  double owedMoney;
 
-  // factory ReturnOwner.fromJSON(Map<String, dynamic>) {}
+  factory ReturnOwner.fromJSON(Map<String, dynamic> json) {
+    int owner = json["owner_id"];
+    double owedMoney = json["owed_money"];
+    final owedJson = json["owed_books"] as List<dynamic>;
+    List<BookInstance> owed = owedJson
+        .map((el) => BookInstance.fromJSON(el))
+        .toList();
+    return ReturnOwner(owner, owed, owedMoney);
+  }
 }