Copy jslib into Directory Connector [TI-6] (#262)

jslib/common/src/misc/iframe_component.ts

@@ -0,0 +1,94 @@
+export abstract class IFrameComponent {
+  iframe: HTMLIFrameElement;
+  private connectorLink: HTMLAnchorElement;
+  private parseFunction = this.parseMessage.bind(this);
+
+  constructor(
+    private win: Window,
+    protected webVaultUrl: string,
+    private path: string,
+    private iframeId: string,
+    public successCallback?: (message: string) => any,
+    public errorCallback?: (message: string) => any,
+    public infoCallback?: (message: string) => any
+  ) {
+    this.connectorLink = win.document.createElement("a");
+  }
+
+  stop() {
+    this.sendMessage("stop");
+  }
+
+  start() {
+    this.sendMessage("start");
+  }
+
+  sendMessage(message: any) {
+    if (!this.iframe || !this.iframe.src || !this.iframe.contentWindow) {
+      return;
+    }
+
+    this.iframe.contentWindow.postMessage(message, this.iframe.src);
+  }
+
+  base64Encode(str: string): string {
+    return btoa(
+      encodeURIComponent(str).replace(/%([0-9A-F]{2})/g, (match, p1) => {
+        return String.fromCharCode(("0x" + p1) as any);
+      })
+    );
+  }
+
+  cleanup() {
+    this.win.removeEventListener("message", this.parseFunction, false);
+  }
+
+  protected createParams(data: any, version: number) {
+    return new URLSearchParams({
+      data: this.base64Encode(JSON.stringify(data)),
+      parent: encodeURIComponent(this.win.document.location.href),
+      v: version.toString(),
+    });
+  }
+
+  protected initComponent(params: URLSearchParams): void {
+    this.connectorLink.href = `${this.webVaultUrl}/${this.path}?${params}`;
+    this.iframe = this.win.document.getElementById(this.iframeId) as HTMLIFrameElement;
+    this.iframe.src = this.connectorLink.href;
+
+    this.win.addEventListener("message", this.parseFunction, false);
+  }
+
+  private parseMessage(event: MessageEvent) {
+    if (!this.validMessage(event)) {
+      return;
+    }
+
+    const parts: string[] = event.data.split("|");
+    if (parts[0] === "success" && this.successCallback) {
+      this.successCallback(parts[1]);
+    } else if (parts[0] === "error" && this.errorCallback) {
+      this.errorCallback(parts[1]);
+    } else if (parts[0] === "info" && this.infoCallback) {
+      this.infoCallback(parts[1]);
+    }
+  }
+
+  private validMessage(event: MessageEvent) {
+    if (
+      event.origin == null ||
+      event.origin === "" ||
+      event.origin !== (this.connectorLink as any).origin ||
+      event.data == null ||
+      typeof event.data !== "string"
+    ) {
+      return false;
+    }
+
+    return (
+      event.data.indexOf("success|") === 0 ||
+      event.data.indexOf("error|") === 0 ||
+      event.data.indexOf("info|") === 0
+    );
+  }
+}