finance/backend: feat: added v1/transactions for accounts CRUD

1 files changed, 67 insertions, 0 deletions

diff --git a/frontend/src/lib/api.ts b/frontend/src/lib/api.ts
index be77f16..e654007 100644
--- a/frontend/src/lib/api.ts
+++ b/frontend/src/lib/api.ts
@@ -109,6 +109,73 @@ export const accountApi = {
   })
 };
 
+// Transaction API
+export interface Transaction {
+  ID: number;
+  CreatedAt: string;
+  UpdatedAt: string;
+  DeletedAt: string | null;
+  UserID: number;
+  AccountID: number | null;
+  Description: string;
+  Amount: number;
+  Type: "Income" | "Expense";
+  Date: string;
+  Category: string;
+}
+
+export interface TransactionInput {
+  description: string;
+  amount: number;
+  type: "Income" | "Expense";
+  date: string; // YYYY-MM-DD format
+  category: string;
+  accountId?: number;
+}
+
+export interface TransactionFilters {
+  type?: "Income" | "Expense";
+  accountId?: number;
+  category?: string;
+  startDate?: string; // YYYY-MM-DD format
+  endDate?: string; // YYYY-MM-DD format
+}
+
+export const transactionApi = {
+  getTransactions: (filters?: TransactionFilters) => {
+    let queryParams = '';
+    
+    if (filters) {
+      const params = new URLSearchParams();
+      if (filters.type) params.append('type', filters.type);
+      if (filters.accountId) params.append('account_id', filters.accountId.toString());
+      if (filters.category) params.append('category', filters.category);
+      if (filters.startDate) params.append('start_date', filters.startDate);
+      if (filters.endDate) params.append('end_date', filters.endDate);
+      
+      queryParams = `?${params.toString()}`;
+    }
+    
+    return fetchWithAuth(`/transactions${queryParams}`);
+  },
+  
+  getTransaction: (id: number) => fetchWithAuth(`/transactions/${id}`),
+  
+  createTransaction: (transaction: TransactionInput) => fetchWithAuth('/transactions', {
+    method: 'POST',
+    body: JSON.stringify(transaction)
+  }),
+  
+  updateTransaction: (id: number, transaction: Partial<TransactionInput>) => fetchWithAuth(`/transactions/${id}`, {
+    method: 'PUT',
+    body: JSON.stringify(transaction)
+  }),
+  
+  deleteTransaction: (id: number) => fetchWithAuth(`/transactions/${id}`, {
+    method: 'DELETE'
+  })
+};
+
 // Loan API
 export interface Loan {
   ID: number;