fix(form): 修复 formitem 的值如果是对象会自动重置为空对象的问题

src/utils/merge.ts

@@ -1,29 +1,89 @@
-export function merge(...objects: any[]) {
-  const result: any = Array.isArray(objects[0]) ? [] : {}
-
-  function mergeHelper(obj: any, path: string[] = []) {
-    for (const [key, value] of Object.entries(obj)) {
-      const newPath = [...path, key]
-
-      if (Array.isArray(value)) {
-        // Arrays are always overridden
-        result[key] = [...value]
-      } else if (typeof value === 'object' && value !== null) {
-        // Check for circular references
+export default main
+
+export function main(clone: boolean, ...items: any[]): any
+export function main(...items: any[]): any
+export function main(...items: any[]) {
+  return merge(...items)
+}
+
+main.clone = clone
+main.isPlainObject = isPlainObject
+main.recursive = recursive
+
+export function merge(clone: boolean, ...items: any[]): any
+export function merge(...items: any[]): any
+export function merge(...items: any[]) {
+  return _merge(items[0] === true, false, items)
+}
+
+export function recursive(clone: boolean, ...items: any[]): any
+export function recursive(...items: any[]): any
+export function recursive(...items: any[]) {
+  return _merge(items[0] === true, true, items)
+}
+
+export function clone<T>(input: T): T {
+  if (Array.isArray(input)) {
+    const output = []
+
+    for (let index = 0; index < input.length; ++index)
+      output.push(clone(input[index]))
+
+    return output as any
+  }
+  if (isPlainObject(input)) {
+    const output: any = {}
+
+    // eslint-disable-next-line guard-for-in
+    for (const index in input) output[index] = clone((input as any)[index])
+
+    return output as any
+  }
+  return input
+}
+
+export function isPlainObject(input: unknown): input is NonNullable<any> {
+  if (input === null || typeof input !== 'object') return false
+  if (Object.getPrototypeOf(input) === null) return true
+  let ref = input
+  while (Object.getPrototypeOf(ref) !== null) ref = Object.getPrototypeOf(ref)
+  return Object.getPrototypeOf(input) === ref
+}
+
+function _recursiveMerge(base: any, extend: any) {
+  if (!isPlainObject(base) || !isPlainObject(extend)) return extend
+  for (const key in extend) {
+    if (key === '__proto__' || key === 'constructor' || key === 'prototype')
+      // eslint-disable-next-line no-continue
+      continue
+    base[key] =
+      isPlainObject(base[key]) && isPlainObject(extend[key])
+        ? _recursiveMerge(base[key], extend[key])
+        : extend[key]
+  }
+
+  return base
+}
+
+function _merge(isClone: boolean, isRecursive: boolean, items: any[]) {
+  let result
+
+  if (isClone || !isPlainObject((result = items.shift()))) result = {}
+
+  for (let index = 0; index < items.length; ++index) {
+    const item = items[index]
+
+    // eslint-disable-next-line no-continue
+    if (!isPlainObject(item)) continue
+
+    for (const key in item) {
+      if (key === '__proto__' || key === 'constructor' || key === 'prototype')
         // eslint-disable-next-line no-continue
-        if (path.some((p: any) => p === value)) continue
-
-        // Recursively merge objects
-        if (!result[key]) result[key] = {}
-        mergeHelper(value, newPath)
-      } else {
-        // Set primitive values
-        result[key] = value
-      }
+        continue
+      const value = isClone ? clone(item[key]) : item[key]
+      result[key] = isRecursive ? _recursiveMerge(result[key], value) : value
     }
   }
 
-  objects.filter((obj) => !!obj).forEach((obj) => mergeHelper(obj))
-
   return result
 }