feat: 添加常用函数

src/utils/index.ts

@@ -1,7 +1,7 @@
 import { pages, subPackages, tabBar } from '@/pages.json'
 import { isMp } from './platform'
 
-const getLastPage = () => {
+export const getLastPage = () => {
   // getCurrentPages() 至少有1个元素，所以不再额外判断
   // const lastPage = getCurrentPages().at(-1)
   // 上面那个在低版本安卓中打包回报错，所以改用下面这个【虽然我加了src/interceptions/prototype.ts，但依然报错】
@@ -176,3 +176,30 @@ export const getEnvBaseUploadUrl = () => {
 
   return baseUploadUrl
 }
+
+export function mergeStep(wrapped: (...rest: any[]) => Promise<any>) {
+  let _mergeStepRequestInstance: any = null
+  return async function (...args) {
+    if (this?._mergeStepRequestInstance ?? _mergeStepRequestInstance)
+      return this?._mergeStepRequestInstance ?? _mergeStepRequestInstance
+    if (this) {
+      this._mergeStepRequestInstance = wrapped.apply(this, args)
+    } else {
+      _mergeStepRequestInstance = wrapped(...args)
+    }
+    if (
+      Object.prototype.toString.call(
+        this?._mergeStepRequestInstance ?? _mergeStepRequestInstance,
+      ) === '[object Promise]'
+    ) {
+      ;(this?._mergeStepRequestInstance ?? _mergeStepRequestInstance).finally(() => {
+        if (this?._mergeStepRequestInstance) {
+          this._mergeStepRequestInstance = null
+        } else {
+          _mergeStepRequestInstance = null
+        }
+      })
+    }
+    return _mergeStepRequestInstance
+  }
+}