feat(plugin): add flashlight plugin

src/plugins/flashlight.ts

@@ -0,0 +1,90 @@
+import {Plugin, Cordova} from './plugin';
+
+/**
+ * @name Flashlight
+ * @description This plugin allows you to switch the flashlight / torch of the device on and off.
+ *
+ * Requires Cordova plugin: `cordova-plugin-flashlight`. For more info, please see the [Flashlight plugin docs](https://github.com/EddyVerbruggen/Flashlight-PhoneGap-Plugin).
+ *
+ * @usage
+ * ```js
+ * ```
+ */
+@Plugin({
+  plugin: 'https://github.com/EddyVerbruggen/Flashlight-PhoneGap-Plugin.git',
+  pluginRef: 'window.plugins.flashlight'
+})
+export class Flashlight {
+
+
+  /**
+   * Checks if the flash light is available
+   * @returns {Promise<boolean>} Returns a promise that resolves with a boolean stating if the flash light is available.
+   */
+  @Cordova()
+  static available() : Promise<boolean>{
+    // 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)=>{});
+  }
+
+  /**
+   * Switches the flashlight on
+   * @returns {Promise<boolean>}
+   */
+  @Cordova()
+  static switchOn() : Promise<boolean>{
+    // 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)=>{});
+  }
+
+  /**
+   * Switches the flash light off
+   * @returns {Promise<boolean>}
+   */
+  @Cordova()
+  static switchOff() : Promise<boolean>{
+    // 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)=>{});
+  }
+
+  /**
+   * Toggles the flashlight
+   * @returns {Promise<any>}
+   */
+  @Cordova()
+  static toggle() : 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<any>((res,rej)=>{});
+  }
+
+
+  /**
+   * Checks if the flash light is turned on.
+   * Returns a boolean
+   */
+  @Cordova({
+    sync: true
+  })
+  static isSwitchedOn() {}
+
+}