SubwayTooter-Android-App/app/src/main/java/jp/juggler/subwaytooter/DownloadReceiver.kt

package jp.juggler.subwaytooter

import android.app.DownloadManager
import android.content.BroadcastReceiver
import android.content.Context
import android.content.Intent
import jp.juggler.util.LogCategory
import jp.juggler.util.getIntOrNull
import jp.juggler.util.getStringOrNull
import jp.juggler.util.showToast

class DownloadReceiver : BroadcastReceiver() {
	
	companion object {
		
		private val log = LogCategory("DownloadReceiver")
	}
	
	override fun onReceive(context : Context, intent : Intent?) {
		when(intent?.action) {
			DownloadManager.ACTION_DOWNLOAD_COMPLETE -> {
				
				val downloadManager =
					context.getSystemService(Context.DOWNLOAD_SERVICE) as DownloadManager
				
				try {
					val id = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, 0L)
					val query = DownloadManager.Query().setFilterById(id)
					
					downloadManager.query(query)?.use { cursor ->
						if(! cursor.moveToFirst()) {
							log.e("cursor.moveToFirst() failed.")
							return
						}
						val title = cursor.getStringOrNull(DownloadManager.COLUMN_TITLE)
						val status = cursor.getIntOrNull(DownloadManager.COLUMN_STATUS)
						context.showToast(
							false,
							if(status == DownloadManager.STATUS_SUCCESSFUL) {
								context.getString(R.string.download_complete, title)
							} else {
								context.getString(R.string.download_failed, title)
							}
						)
						/*
							ダウンロード完了通知がシステムからのものと重複することがある

							- (Aubee elm. Android 5.1) don't shows toast.
							- (Samsung Galaxy S8+ Android 7.0) don't show toast.
							- (Kyocera AndroidOne Android 8.0 S2) don't show toast.
							- (LGE LGL24 Android 5.0.2) SHOWS toast.
							- (LGE LGV32 Android 6.0) SHOWS toast.
							
							maybe it depends on customization by device maker. not depends on OS version.
							
							重複を回避する方法はなさそうだ…
						*/
					}
				} catch(ex : Throwable) {
					log.e(ex, "downloadManager.query() failed.")
				}
			}
		}
	}
}