YouTube download link obtained

app/build.gradle

@@ -29,6 +29,8 @@ dependencies {
  implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
  implementation 'com.google.android.material:material:1.1.0'
  implementation 'com.google.android.gms:play-services-ads:18.3.0'
+ implementation 'com.google.code.gson:gson:2.8.6'
 
+ implementation 'com.github.kittinunf.fuel:fuel-android:2.2.1'
  implementation 'com.github.pdrogfer:MidiDroid:v1.1'
 }

app/src/main/AndroidManifest.xml

@@ -32,6 +32,12 @@
  <category android:name="android.intent.category.LAUNCHER" />
  </intent-filter>
 
+ <intent-filter>
+ <action android:name="android.intent.action.SEND" />
+ <category android:name="android.intent.category.DEFAULT" />
+ <data android:mimeType="text/plain" />
+ </intent-filter>
+
  <tools:validation testUrl="http:https://bshakhovsky.github.io" />
  <tools:validation testUrl="https://bshakhovsky.github.io" />
  <!-- Android - Lint - Correctness - App Links Auto Verification Failure
@@ -55,5 +61,10 @@
  android:label="@string/midi" android:theme="@style/AppTheme" />
  <activity android:name=".GuideActivity" android:parentActivityName=".MainActivity"
  android:label="@string/guide" android:theme="@style/AppTheme" />
+
+ <activity android:name=".Web.WebActivity" android:parentActivityName=".MainActivity"
+ android:label="@string/surf" android:theme="@style/AppTheme" />
+
  </application>
+
 </manifest>

app/src/main/java/ru/BShakhovsky/Piano_Transcription/AddDialog.kt

@@ -30,6 +30,8 @@ import kotlinx.android.synthetic.main.dialog_add.midiFile
 import kotlinx.android.synthetic.main.dialog_add.record
 import kotlinx.android.synthetic.main.dialog_add.surf
 
+import ru.BShakhovsky.Piano_Transcription.Web.WebActivity
+
 import java.io.FileDescriptor
 import java.io.IOException
 
@@ -65,7 +67,10 @@ class AddDialog : DialogFragment(), View.OnClickListener {
  DebugMode.assertArgument(view != null)
  DebugMode.assertState((dialog != null) and (activity != null))
  when (view?.id) {
- R.id.surf -> dialog?.dismiss()
+ R.id.surf -> {
+ startActivity(Intent(activity, WebActivity::class.java))
+ dialog?.dismiss()
+ }
  R.id.mediaFile -> {
  with(Intent(Intent.ACTION_GET_CONTENT)) {
  type = "*/*"

app/src/main/java/ru/BShakhovsky/Piano_Transcription/DebugMode.kt

@@ -10,9 +10,6 @@ object DebugMode {
  debug = true // BuildConfig.DEBUG
  }
 
- fun assertArgument(b: Boolean, msg: String = ""): Unit =
- if (debug) require(b) { msg } else Unit
-
- fun assertState(b: Boolean, msg: String = ""): Unit =
- if (debug) check(b) { msg } else Unit
+ fun assertArgument(b: Boolean, msg: String = ""): Unit = if (debug) require(b) { msg } else Unit
+ fun assertState(b: Boolean, msg: String = ""): Unit = if (debug) check(b) { msg } else Unit
 }

app/src/main/java/ru/BShakhovsky/Piano_Transcription/MainActivity.kt

@@ -52,6 +52,7 @@ import ru.BShakhovsky.Piano_Transcription.MainUI.Touch
 import ru.BShakhovsky.Piano_Transcription.Midi.Midi
 import ru.BShakhovsky.Piano_Transcription.Midi.MidiActivity
 import ru.BShakhovsky.Piano_Transcription.OpenGL.Render
+import ru.BShakhovsky.Piano_Transcription.Web.WebActivity
 
 import java.io.FileNotFoundException
 import java.util.concurrent.Executors
@@ -175,6 +176,13 @@ class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelecte
 
  MobileAds.initialize(this)
  AdBanner(adMain)
+
+ // TODO: onCreate not called after onStop, and intent.extras == null anyway
+ if (intent.hasExtra(Intent.EXTRA_TEXT))
+ with(Intent(this@MainActivity, WebActivity::class.java)) {
+ putExtras(intent)
+ startActivity(this)
+ }
  }
 
  override fun onCreateOptionsMenu(menu: Menu): Boolean {
@@ -321,7 +329,7 @@ class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelecte
  try {
  contentResolver.openInputStream(uri)
  } catch (e: FileNotFoundException) {
- with(e) { showMsg(R.string.notFound, "${localizedMessage ?: this}\n\n$uri") }
+ with(e) { showMsg(R.string.noFile, "${localizedMessage ?: this}\n\n$uri") }
  return
  }.also { inputStream ->
  DebugMode.assertState(inputStream != null)

app/src/main/java/ru/BShakhovsky/Piano_Transcription/OpenGL/Geometry/Primitive.kt

@@ -44,8 +44,7 @@ class Primitive(cords: FloatArray, order: IntArray, texArray: FloatArray? = null
  y1 * z2 - z1 * y2, z1 * x2 - x1 * z2, x1 * y2 - y1 * x2
  ).also { (crossX, crossY, crossZ) ->
  sqrt(
- crossX.pow(2) + crossY.pow(2)
- + crossZ.pow(2)
+ crossX.pow(2) + crossY.pow(2) + crossZ.pow(2)
  ).also { distance ->
  for (k in 0..2) {
  normArray[i * 9 + k * 3] = crossX / distance

app/src/main/java/ru/BShakhovsky/Piano_Transcription/RecordMsg.kt

@@ -92,4 +92,4 @@ class RecordMsg(private val recDlg: AlertDialog, record: MediaRecorder, context:
 
  fun start(): Unit = schedule.execute(this)
  fun stop(): Unit = schedule.shutdown()
-}
+}

app/src/main/java/ru/BShakhovsky/Piano_Transcription/Web/WebActivity.kt

@@ -0,0 +1,170 @@
+@file:Suppress("PackageName")
+
+package ru.BShakhovsky.Piano_Transcription.Web
+
+import android.annotation.SuppressLint
+import android.content.Intent
+import android.os.Bundle
+import android.view.View
+import androidx.appcompat.app.AppCompatActivity
+import com.github.kittinunf.fuel.core.Response
+import com.github.kittinunf.fuel.httpGet
+import com.github.kittinunf.result.Result
+import com.google.android.material.snackbar.Snackbar
+import com.google.gson.Gson
+import com.google.gson.JsonSyntaxException
+
+import kotlinx.android.synthetic.main.activity_web.download
+import kotlinx.android.synthetic.main.activity_web.goBack
+import kotlinx.android.synthetic.main.activity_web.goForward
+import kotlinx.android.synthetic.main.activity_web.goHome
+
+import kotlinx.android.synthetic.main.content_web.web
+import kotlinx.android.synthetic.main.content_web.webText
+
+import ru.BShakhovsky.Piano_Transcription.DebugMode
+import ru.BShakhovsky.Piano_Transcription.R
+import java.net.URLDecoder
+
+class WebActivity : AppCompatActivity(), View.OnClickListener {
+
+ data class AdaptiveFormat(
+ val url: String, val mimeType: String, @Suppress("SpellCheckingInspection") val itag: Int,
+ val averageBitrate: Int, val audioSampleRate: String, val contentsLength: String
+ )
+
+ data class Thumbnail(val url: String, val width: String, val height: String)
+ data class Thumbnails(val thumbnails: List<Thumbnail>)
+
+ data class StreamingData(val adaptiveFormats: List<AdaptiveFormat>)
+ data class PlayabilityStatus(val status: String)
+ data class VideoDetails(val title: String, val author: String, val thumbnail: Thumbnails)
+
+ data class PlayerResponse(
+ val streamingData: StreamingData?,
+ val playabilityStatus: PlayabilityStatus, val videoDetails: VideoDetails
+ )
+
+ override fun onCreate(savedInstanceState: Bundle?) {
+ super.onCreate(savedInstanceState)
+ setContentView(R.layout.activity_web)
+
+ with(web) {
+ @SuppressLint("SetJavaScriptEnabled")
+ settings.javaScriptEnabled = true
+
+ savedInstanceState?.let {
+ web.restoreState(it)
+ return@with
+ }
+
+ with(intent.extras) {
+ (if (this == null) "https://youtu.be"
+ else get(Intent.EXTRA_TEXT).toString().also {
+ if (!intent.hasExtra(Intent.EXTRA_SUBJECT)) Snackbar.make(
+ web, getString(R.string.notUrl, it), Snackbar.LENGTH_LONG
+ ).show()
+ }).also {
+ webViewClient = WebClient(it, webText)
+ loadUrl(it)
+ }
+ }
+ }
+
+ arrayOf(goHome, goBack, goForward, download).forEach { it.setOnClickListener(this) }
+ }
+
+ override fun onSaveInstanceState(outState: Bundle) {
+ super.onSaveInstanceState(outState)
+ web.saveState(outState)
+ }
+
+ override fun onRestoreInstanceState(savedInstanceState: Bundle) {
+ super.onRestoreInstanceState(savedInstanceState)
+ web.restoreState(savedInstanceState)
+ }
+
+ override fun onClick(view: View?) {
+ DebugMode.assertArgument(view != null)
+ with(web) {
+ when (view?.id) {
+ R.id.goHome -> super.onBackPressed()
+ R.id.goBack -> if (canGoBack()) goBack()
+ R.id.goForward -> if (canGoForward()) goForward()
+ R.id.download -> tryDownload()
+ else -> DebugMode.assertState(false)
+ }
+ }
+ }
+
+ override fun onBackPressed() {
+ with(web) { if (canGoBack()) goBack() else super.onBackPressed() }
+ }
+
+ private fun tryDownload() {
+ DebugMode.assertState(web.url != null)
+ web.url?.let { url ->
+ @Suppress("RegExpAnonymousGroup") when {
+ Regex("""^https?:https://(www\.)?(m\.)?youtube\.com""").containsMatchIn(url) ->
+ Regex("""v=[\w\-]{11}""").find(url)?.value?.substring(2)
+ @Suppress("SpellCheckingInspection")
+ Regex("""^https?:https://(www\.)?(m\.)?youtu.be/""").containsMatchIn(url) ->
+ @Suppress("SpellCheckingInspection")
+ Regex("""youtu.be/[\w\-]{11}""").find(url)?.value?.substring(9)
+ else -> null
+ }.also { id ->
+ if (id == null)
+ Snackbar.make(web, R.string.noLink, Snackbar.LENGTH_LONG).show()
+ else "https://www.youtube.com/get_video_info?video_id=$id"
+ .httpGet().response { _, response, result ->
+ when (result) {
+ is Result.Failure -> {
+ Snackbar.make(web, R.string.linkFailed, Snackbar.LENGTH_LONG).show()
+ return@response
+ }
+ is Result.Success -> startDownload(response)
+ else -> DebugMode.assertState(false)
+ }
+ }
+ }
+ }
+ }
+
+ private fun startDownload(response: Response) {
+ try {
+ var playerResponse = ""
+ for (p in response.toString().split('&'))
+ p.split('=').also { if (it[0] == "player_response") playerResponse = it[1] }
+ val parsedJson = Gson().fromJson(
+ URLDecoder.decode(playerResponse, "UTF-8"), PlayerResponse::class.java
+ )
+ if (parsedJson == null) {
+ Snackbar.make(web, R.string.copyrightProtected, Snackbar.LENGTH_LONG).show()
+ return
+ }
+ // if (parsedJson.playabilityStatus.status == "UNPLAYABLE") {
+ if (parsedJson.streamingData == null) {
+ Snackbar.make(web, R.string.copyrightProtected, Snackbar.LENGTH_LONG).show()
+ return
+ }
+
+ var maxITag = 0
+ var bestQualityAudioFormat: AdaptiveFormat? = null
+ for (adaptiveFormat in parsedJson.streamingData.adaptiveFormats)
+ if ((adaptiveFormat.mimeType.startsWith("audio"))
+ and (adaptiveFormat.itag >= maxITag)
+ ) {
+ maxITag = adaptiveFormat.itag
+ bestQualityAudioFormat = adaptiveFormat
+ }
+
+ Snackbar.make(
+ // Uri.parse(bestQualityAudioFormat.url).toString()
+ web, bestQualityAudioFormat?.url
+ ?: getString(R.string.noAudioStream), Snackbar.LENGTH_LONG
+ ).show()
+ } catch (e: JsonSyntaxException) {
+ Snackbar.make(web, R.string.notJson, Snackbar.LENGTH_LONG).show()
+ }
+ }
+}

app/src/main/java/ru/BShakhovsky/Piano_Transcription/Web/WebClient.kt

@@ -0,0 +1,35 @@
+@file:Suppress("PackageName")
+
+package ru.BShakhovsky.Piano_Transcription.Web
+
+import android.view.View
+
+import android.webkit.WebView
+import android.webkit.WebViewClient
+import android.webkit.WebResourceRequest
+
+import android.widget.TextView
+
+import ru.BShakhovsky.Piano_Transcription.DebugMode
+import ru.BShakhovsky.Piano_Transcription.R
+
+class WebClient(private var requestedUrl: String, private var webText: TextView) : WebViewClient() {
+
+ override fun shouldOverrideUrlLoading(view: WebView?, request: WebResourceRequest?): Boolean {
+ DebugMode.assertArgument((view != null) and (request != null))
+ request?.url.toString().also {
+ requestedUrl = it
+ view?.loadUrl(it)
+ }
+ return super.shouldOverrideUrlLoading(view, request)
+ }
+
+ override fun onPageFinished(view: WebView?, url: String?) {
+ super.onPageFinished(view, url)
+ DebugMode.assertArgument((view != null) and (url != null))
+ if (url == "about:blank") with(webText) {
+ visibility = View.VISIBLE
+ text = context.getString(R.string.aboutBlank, requestedUrl)
+ }
+ }
+}

app/src/main/res/drawable/back.xml

@@ -0,0 +1,6 @@
+<vector xmlns:android="http:https://schemas.android.com/apk/res/android"
+ android:width="24dp" android:height="24dp"
+ android:viewportWidth="24" android:viewportHeight="24">
+ <!--suppress LongLine -->
+ <path android:fillColor="#FF000000" android:pathData="M20,11H7.83l5.59,-5.59L12,4l-8,8 8,8 1.41,-1.41L7.83,13H20v-2z"/>
+</vector>

app/src/main/res/drawable/close.xml

@@ -0,0 +1,6 @@
+<vector xmlns:android="http:https://schemas.android.com/apk/res/android"
+ android:width="24dp" android:height="24dp"
+ android:viewportWidth="24" android:viewportHeight="24">
+ <!--suppress LongLine -->
+ <path android:fillColor="#FF000000" android:pathData="M10.09,15.59L11.5,17l5,-5 -5,-5 -1.41,1.41L12.67,11H3v2h9.67l-2.58,2.59zM19,3H5c-1.11,0 -2,0.9 -2,2v4h2V5h14v14H5v-4H3v4c0,1.1 0.89,2 2,2h14c1.1,0 2,-0.9 2,-2V5c0,-1.1 -0.9,-2 -2,-2z"/>
+</vector>

app/src/main/res/drawable/download.xml

@@ -0,0 +1,6 @@
+<vector xmlns:android="http:https://schemas.android.com/apk/res/android"
+ android:width="24dp" android:height="24dp"
+ android:viewportWidth="24" android:viewportHeight="24">
+ <!--suppress LongLine -->
+ <path android:fillColor="#FF000000" android:pathData="M19.35,10.04C18.67,6.59 15.64,4 12,4 9.11,4 6.6,5.64 5.35,8.04 2.34,8.36 0,10.91 0,14c0,3.31 2.69,6 6,6h13c2.76,0 5,-2.24 5,-5 0,-2.64 -2.05,-4.78 -4.65,-4.96zM17,13l-5,5 -5,-5h3V9h4v4h3z"/>
+</vector>

app/src/main/res/drawable/forward.xml

@@ -0,0 +1,6 @@
+<vector xmlns:android="http:https://schemas.android.com/apk/res/android"
+ android:width="24dp" android:height="24dp"
+ android:viewportWidth="24" android:viewportHeight="24">
+ <!--suppress LongLine -->
+ <path android:fillColor="#FF000000" android:pathData="M12,4l-1.41,1.41L16.17,11H4v2h12.17l-5.58,5.59L12,20l8,-8z"/>
+</vector>

app/src/main/res/drawable/round_corners.xml

@@ -12,4 +12,5 @@
  android:color="@color/colorAccent" />
 
  <corners android:radius="24dp" />
+
 </shape>