feat: 转账功能

src/budget/_account.py

@@ -21,8 +21,10 @@ class AccountTab(TabPage):
         # 默认宽度
         self.accountBalanceLine.setFixedWidth(150)
         self.accountModifyButton = QPushButton('Modify')
+        self.accountTransferButton = QPushButton('Transfer')
         self.accountAddButton = QPushButton('Add')
         self.accountModifyButton.clicked.connect(self.onAccountModifyClicked)
+        self.accountTransferButton.clicked.connect(self.onAccountTransferClicked)
         self.accountAddButton.clicked.connect(self.onAccountAddClicked)
 
         # 创建控件布局
@@ -30,6 +32,7 @@ class AccountTab(TabPage):
         topLayout.addWidget(self.accountComboBox)
         topLayout.addWidget(self.accountBalanceLine)
         topLayout.addWidget(self.accountModifyButton)
+        topLayout.addWidget(self.accountTransferButton)
         topLayout.addWidget(self.accountAddButton)
 
         # 创建表格
@@ -252,3 +255,73 @@ class AccountTab(TabPage):
             self.accountTable.setItem(i, 2, QTableWidgetItem(str(self.transData[i][5])))
             self.accountTable.setItem(i, 3, QTableWidgetItem(self.transData[i][6]))
 
+
+    def onAccountTransferClicked(self):
+        # 创建添加数据对话框
+        self.aDialog = QDialog(self)
+        self.aDialog.setWindowTitle('Transfer')
+        srcLabel = QLabel("Source Account:")
+        srcComboBox = QComboBox()
+        for row in self.rows:
+            data = row[1]
+            srcComboBox.addItem(data)
+        dstLabel = QLabel("Destination Account:")
+        dstComboBox = QComboBox()
+        for row in self.rows:
+            data = row[1]
+            dstComboBox.addItem(data)
+        amountLabel = QLabel("Amount:")
+        amountLine = QLineEdit()
+        amountLine.setText("0.00")
+        # 只允许输入两位小数
+        amountLine.setValidator(QDoubleValidator(0.00, 999999999.99, 2))
+
+        # 按钮
+        button1 = QPushButton("Confirm")
+        button2 = QPushButton("Abort")
+        buttonLayout = QHBoxLayout()
+        buttonLayout.addWidget(button1)
+        buttonLayout.addWidget(button2)
+
+        button1.clicked.connect(self.aDialog.accept)
+        button2.clicked.connect(self.aDialog.reject)
+
+        layout = QFormLayout()
+        layout.addRow(srcLabel,srcComboBox)
+        layout.addRow(dstLabel,dstComboBox)
+        layout.addRow(amountLabel,amountLine)
+        layout.addRow(buttonLayout)
+        layout.setSpacing(12)
+        layout.setContentsMargins(15, 15, 15, 15)
+        self.aDialog.setMinimumWidth(400)
+        self.aDialog.setLayout(layout)
+
+        if self.aDialog.exec() == QDialog.DialogCode.Accepted:
+            try:
+                # 获取账户c_id
+                src_id = self.rows[srcComboBox.currentIndex()][0]
+                dst_id = self.rows[dstComboBox.currentIndex()][0]
+                amount = float(amountLine.text())
+                
+                if (amount <= 0):
+                    raise Exception('Amount must be greater than zero')
+                if (src_id == dst_id):
+                    raise Exception('Source and destination account cannot be the same')
+
+                # 插入数据
+                data = {"type":"transfer", "description": "Transfer"}
+                data = json.dumps(data)
+                self.pg.execute(
+                    "INSERT INTO transaction (time, a_id, s_id, amount, meta)\
+                     VALUES (now(), %s, %s, %s, %s)", (dst_id, src_id, amount, data,))
+                # 源账户减少
+                self.pg.execute(
+                    "UPDATE account SET balance = balance - (%s::NUMERIC)::MONEY WHERE a_id = %s", (amount, src_id,))
+                # 目标账户增加
+                self.pg.execute(
+                    "UPDATE account SET balance = balance +(%s::NUMERIC)::MONEY WHERE a_id = %s", (amount, dst_id,))
+                # 刷新表格
+                self.selected()
+            except Exception as e:
+                print(e)
+                QMessageBox.critical(self, 'Error', str(e))