Feat: Switching the programming language of the code operator will switch the corresponding language template #3221 (#7770)

### What problem does this PR solve?

Feat: Switching the programming language of the code operator will
switch the corresponding language template #3221

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

web/src/pages/agent/hooks/use-watch-form-change.ts

@@ -0,0 +1,98 @@
+import { CodeTemplateStrMap, ProgrammingLanguage } from '@/constants/agent';
+import { settledModelVariableMap } from '@/constants/knowledge';
+import { omit } from 'lodash';
+import { useCallback, useEffect } from 'react';
+import { UseFormReturn } from 'react-hook-form';
+import { Operator } from '../constant';
+import useGraphStore from '../store';
+import { buildCategorizeObjectFromList } from '../utils';
+
+export const useHandleFormValuesChange = (
+  operatorName: Operator,
+  id?: string,
+  form?: UseFormReturn,
+) => {
+  const updateNodeForm = useGraphStore((state) => state.updateNodeForm);
+
+  const handleValuesChange = useCallback(
+    (changedValues: any, values: any) => {
+      let nextValues: any = values;
+      // Fixed the issue that the related form value does not change after selecting the freedom field of the model
+      if (
+        Object.keys(changedValues).length === 1 &&
+        'parameter' in changedValues &&
+        changedValues['parameter'] in settledModelVariableMap
+      ) {
+        nextValues = {
+          ...values,
+          ...settledModelVariableMap[
+            changedValues['parameter'] as keyof typeof settledModelVariableMap
+          ],
+        };
+      }
+      if (id) {
+        updateNodeForm(id, nextValues);
+      }
+    },
+    [updateNodeForm, id],
+  );
+
+  useEffect(() => {
+    const subscription = form?.watch((value, { name, type, values }) => {
+      console.log('🚀 ~ subscription ~ value:', value);
+      if (id && name) {
+        console.log(
+          '🚀 ~ useEffect ~ value:',
+          name,
+          type,
+          values,
+          operatorName,
+        );
+        let nextValues: any = value;
+
+        // Fixed the issue that the related form value does not change after selecting the freedom field of the model
+        if (
+          name === 'parameter' &&
+          value['parameter'] in settledModelVariableMap
+        ) {
+          nextValues = {
+            ...value,
+            ...settledModelVariableMap[
+              value['parameter'] as keyof typeof settledModelVariableMap
+            ],
+          };
+        }
+
+        const categoryDescriptionRegex = /items\.\d+\.name/g;
+        if (
+          operatorName === Operator.Categorize &&
+          categoryDescriptionRegex.test(name)
+        ) {
+          nextValues = {
+            ...omit(value, 'items'),
+            category_description: buildCategorizeObjectFromList(value.items),
+          };
+        }
+
+        if (
+          operatorName === Operator.Code &&
+          type === 'change' &&
+          name === 'lang'
+        ) {
+          nextValues = {
+            ...value,
+            script: CodeTemplateStrMap[value.lang as ProgrammingLanguage],
+          };
+        }
+        // Manually triggered form updates are synchronized to the canvas
+        if (type) {
+          // run(id, nextValues);
+          updateNodeForm(id, nextValues);
+        }
+      }
+    });
+    return () => subscription?.unsubscribe();
+  }, [form, form?.watch, id, operatorName, updateNodeForm]);
+
+  return { handleValuesChange };
+};