Merge pull request #25 from ihadeed/add-app-avail

Add app avail

src/plugins/appavailability.ts

@@ -0,0 +1,50 @@
+import {Plugin, Cordova} from './plugin';
+
+/**
+ * This plugin allows you to check if an app is installed on the user's device. It requires an URI Scheme (e.g. twitter://) on iOS or a Package Name (e.g com.twitter.android) on Android.
+ *
+ * Requires Cordova plugin: cordova-plugin-appavailability. For more info, please see the [AppAvailability plugin docs](https://github.com/ohh2ahh/AppAvailability).
+ *
+ * ```
+ * cordova plugin add https://github.com/ohh2ahh/AppAvailability.git
+ * ```
+ *
+ * @usage
+ * ```js
+ * var app;
+ *
+ * if(device.platform === 'iOS') {
+ *   app = 'twitter://';
+ * }else if(device.platform === 'Android'){
+ *   app = 'com.twitter.android';
+ * }
+ *
+ * AppAvailability.check(app)
+ *   .then(
+ *     yes => console.log(app + " is available"),
+ *     no => console.log(app + " is NOT available")
+ *   );
+ * ```
+ */
+@Plugin({
+  plugin: 'https://github.com/ohh2ahh/AppAvailability.git',
+  pluginRef: 'appAvailability'
+})
+export class AppAvailability {
+
+  /**
+   * Checks if an app is available on device
+   * @param app Package name on android, or URI scheme on iOS
+   * @returns {Promise<boolean>}
+   */
+  @Cordova()
+  static check(app : string) : Promise<any> {
+    // This Promise is replaced by one from the @Cordova decorator that wraps
+    // the plugin's callbacks. We provide a dummy one here so TypeScript
+    // knows that the correct return type is Promise, because there's no way
+    // for it to know the return type from a decorator.
+    // See https://github.com/Microsoft/TypeScript/issues/4881
+    return new Promise<boolean>((res, rej) => {});
+  }
+
+}