feat(downloader): add plugin (#2820)

* feat(downloader): add plugin

* Update index.ts

Author: Luka313

src/@ionic-native/plugins/downloader/index.ts

@@ -0,0 +1,124 @@
+import { Injectable } from '@angular/core';
+import { Cordova, IonicNativePlugin, Plugin } from '@ionic-native/core';
+
+export enum NotificationVisibility {
+  Visible = 0,
+  VisibleNotifyCompleted = 1,
+  VisibilityHidden = 2,
+  VisibleNotifyOnlyCompletion = 3
+}
+
+export interface DownloadHttpHeader {
+  header: string;
+  value: string;
+}
+
+export interface DestinationDirectory {
+  dirType: string;
+  subPath: string;
+}
+
+export interface DownloadRequest {
+  /**
+   * Location of the resource to download
+   */
+  uri: string;
+
+  /**
+   * Set the title of this download, to be displayed in notifications (if enabled).
+   * If no title is given, a default one will be assigned based on the download filename, once the download starts.
+   */
+  title?: string;
+  /**
+   * Set a description of this download, to be displayed in notifications (if enabled)
+   */
+  description?: string;
+  /**
+   * Set the MIME content type of this download. This will override the content type declared in the server's response.
+   */
+  mimeType?: string;
+  /**
+   * Set whether this download should be displayed in the system's Downloads UI. True by default.
+   */
+  visibleInDownloadsUi?: boolean;
+  /**
+   * Control whether a system notification is posted by the download manager while this download is running or when it is completed.
+   */
+  notificationVisibility?: NotificationVisibility;
+  /**
+   * Set the local destination for the downloaded file to a path within the application's external files directory
+   */
+  destinationInExternalFilesDir?: DestinationDirectory;
+  /**
+   * Set the local destination for the downloaded file to a path within the public external storage directory
+   */
+  destinationInExternalPublicDir?: DestinationDirectory;
+  /**
+   * Set the local destination for the downloaded file.
+   * Must be a file URI to a path on external storage, and the calling application must have the WRITE_EXTERNAL_STORAGE permission.
+   */
+  destinationUri?: string;
+  /**
+   * Add an HTTP header to be included with the download request. The header will be added to the end of the list.
+   */
+  headers?: DownloadHttpHeader[];
+}
+
+/**
+ * @name Downloader
+ * @description
+ * This plugin is designed to support downloading files using Android DownloadManager.
+ *
+ *
+ * @usage
+ * ```typescript
+ * import { Downloader } from '@ionic-native/downloader/ngx';
+ *
+ *
+ * constructor(private downloader: Downloader) { }
+ *
+ * ...
+ *
+ *    var request: DownloadRequest = {
+ *           uri: YOUR_URI,
+ *           title: 'MyDownload',
+ *           description: '',
+ *           mimeType: '',
+ *           visibleInDownloadsUi: true,
+ *           notificationVisibility: NotificationVisibility.VisibleNotifyCompleted,
+ *           destinationInExternalFilesDir: {
+ *               dirType: 'Downloads',
+ *               subPath: 'MyFile.apk'
+ *           }
+ *       };
+ *
+ *
+ *   this.downloader.download(request)
+ *   			.then((location: string) => console.log('File downloaded at:'+location))
+ *   			.catch((error: any) => console.error(error));
+ *
+ * ```
+ * @interfaces
+ * NotificationVisibility
+ * Header
+ * DestinationDirectory
+ * DownloadHttpHeader
+ */
+@Plugin({
+  pluginName: 'Downloader',
+  plugin: 'integrator-cordova-plugin-downloader',
+  pluginRef: 'cordova.plugins.Downloader',
+  repo: 'https://github.com/Luka313/integrator-cordova-plugin-downloader.git',
+  platforms: ['Android']
+})
+@Injectable()
+export class Downloader extends IonicNativePlugin {
+  /**
+   *  Starts a new download and returns location of the downloaded file on completion
+   *  @param request {DownloadRequest}
+   */
+  @Cordova()
+  download(request: DownloadRequest): Promise<string> {
+  return;
+  }
+}