first commit

TUICallKit-Vue3/TUIKit/states/chat-uikit-engine-lite/utils/middleware.ts

@@ -0,0 +1,40 @@
+import type { func } from '../type';
+
+class Middleware {
+  private cache: func[];
+  private middlewares: func[];
+  private options: any;
+  constructor() {
+    this.cache = [];
+    this.middlewares = [];
+    this.options = null; // 缓存options
+  }
+
+  use(fn: func) {
+    if (typeof fn !== 'function') {
+      console.error('middleware must be a function');
+    }
+    this.cache.push(fn);
+    return this;
+  }
+
+  next(): any {
+    if (this.middlewares && this.middlewares.length > 0) {
+      const ware: any = this.middlewares.shift();
+      return ware.call(this, this.options, this.next.bind(this));
+    }
+    return undefined;
+  }
+
+  /**
+   * @param {any} options - 数据的入口
+   * @returns {Function}
+   */
+  run(options: any): any {
+    this.middlewares = this.cache.map(fn => fn);
+    this.options = options; // 缓存数据
+    return this.next();
+  }
+}
+
+export default Middleware;