Let user open in the PC browser media URL to Android device [1/2]

Seek position is preserved for following domains:
youtube.com
youtu.be
pornhub.com
vimeo.com
dailymotion.com
twitch.tv

ic_arrow_black.xml was converted from Kubuntu 19.10 AMD64
breeze-icon-theme package:
/usr/share/icons/breeze-dark/actions/32/arrow.svg

res/drawable/ic_arrow_black.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" xmlns:aapt="http://schemas.android.com/aapt"
+    android:viewportWidth="32"
+    android:viewportHeight="32"
+    android:width="32dp"
+    android:height="32dp">
+    <path
+        android:pathData="M8.990234 5c-0.5522847 0 -1 0.4477153 -1 1 0 0.5522847 0.4477153 1 1 1 0.5522847 0 1 -0.4477153 1 -1 0 -0.5522847 -0.4477153 -1 -1 -1zm2 4L11 29 16.841796 21.769531 26 21Z"
+        android:fillColor="#FF000000" />
+</vector>

res/layout/mpris_control.xml

@@ -101,6 +101,14 @@
             android:src="@drawable/ic_next_black"
             android:theme="@style/DisableableButton" />
 
+        <ImageButton
+            android:id="@+id/open_url_button"
+            android:layout_width="match_parent"
+            android:layout_height="fill_parent"
+            android:layout_weight="0.25"
+            android:contentDescription="@string/mpris_open_url"
+            android:src="@drawable/ic_arrow_black"
+            android:theme="@style/DisableableButton" />
     </LinearLayout>
 
     <LinearLayout

res/values-ru/strings.xml

@@ -289,4 +289,7 @@
   <string name="no_app_for_opening">Для этого файла нет приложений, способных его открыть</string>
   <string name="remote_keyboard_service">Удалённая клавиатура KDE Connect</string>
   <string name="presenter_pointer">Указатель</string>
+  <string name="mpris_open_url">Открыть URL</string>
+  <string name="cant_open_url">Не удалось открыть URL</string>
+  <string name="cant_format_seek_uri">Не удалось задать позицию в URL</string>
 </resources>

res/values/strings.xml

@@ -354,4 +354,7 @@
     <string name="location_permission_needed_title">Permission required</string>
     <string name="location_permission_needed_desc">Android requires the Location permission to identify your WiFi network</string>
     <string name="clipboard_android_x_incompat">Android 10 has removed clipboard access to all apps. This plugin will be disabled.</string>
+    <string name="mpris_open_url">Open URL</string>
+    <string name="cant_open_url">Can\'t open URL</string>
+    <string name="cant_format_seek_uri">Can\'t format URL for seek</string>
 </resources>

src/org/kde/kdeconnect/Helpers/VideoUrlsHelper.java

@@ -0,0 +1,145 @@
+package org.kde.kdeconnect.Helpers;
+
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.util.Locale;
+
+public class VideoUrlsHelper {
+    private static final int SECONDS_IN_MINUTE = 60;
+    private static final int MINUTES_IN_HOUR = 60;
+    private static final int SECONDS_IN_HOUR = SECONDS_IN_MINUTE * MINUTES_IN_HOUR;
+
+    public static URL formatUriWithSeek(String address, long position)
+            throws MalformedURLException {
+        URL url = new URL(address);
+        position /= 1000; // Convert ms to seconds
+        if (position <= 0) {
+            return url; // nothing to do
+        }
+        String host = url.getHost().toLowerCase();
+
+        // Most common settings as defaults:
+        String parameter = "t="; // Characters before timestamp
+        String timestamp = Long.toString(position); // Timestamp itself
+        String trailer = ""; // Characters after timestamp
+        // true  - search/add to query URL part (between ? and # signs),
+        // false - search/add timestamp to ref (anchor) URL part (after # sign),
+        boolean inQuery = true;
+        // true - We know how to format URL with seek timestamp, false - not
+        boolean seekUrl = false;
+
+        // Override defaults if necessary
+        if (host.contains("youtube.com")
+                || host.contains("youtu.be")
+                || host.contains("pornhub.com")) {
+            seekUrl = true;
+            url = stripTimestampS(url, parameter, trailer, inQuery);
+        } else if (host.contains("vimeo.com")) {
+            seekUrl = true;
+            trailer = "s";
+            url = stripTimestampS(url, parameter, trailer, inQuery);
+        } else if (host.contains("dailymotion.com")) {
+            seekUrl = true;
+            parameter = "start=";
+            url = stripTimestampS(url, parameter, trailer, inQuery);
+        } else if (host.contains("twitch.tv")) {
+            seekUrl = true;
+            timestamp = formatTimestampHMS(position, true);
+            url = stripTimestampHMS(url, parameter, trailer, inQuery);
+        }
+
+        if (seekUrl) {
+            url = formatUrlWithSeek(url, timestamp, parameter, trailer, inQuery);
+        }
+        return url;
+    }
+
+    // Returns timestamp in 1h2m34s or 01h02m34s (according to padWithZeroes)
+    private static String formatTimestampHMS(long seconds, boolean padWithZeroes) {
+        if (seconds == 0) {
+            return "0s";
+        }
+
+        int sec = (int) (seconds % SECONDS_IN_MINUTE);
+        int min = (int) ((seconds / SECONDS_IN_MINUTE) % MINUTES_IN_HOUR);
+        int hour = (int) (seconds / SECONDS_IN_HOUR);
+
+        String hours = hour > 0 ? hour + "h" : "";
+        String mins = min > 0 || hour > 0 ? min + "m" : "";
+        String secs = sec + "s";
+
+        String value;
+        if (padWithZeroes) {
+            String hoursPad = hour > 9 ? "" : "0";
+            String minsPad = min > 9 ? "" : "0";
+            String secsPad = sec > 9 ? "" : "0";
+            value = hoursPad + hours + minsPad + mins + secsPad + secs;
+        } else {
+            value = hours + mins + secs;
+        }
+        return value;
+
+    }
+
+    // Remove timestamp in 01h02m34s or 1h2m34s or 02m34s or 2m34s or 01s or 1s format.
+    // Can also nandle rimestamps in 1234s format if called with 's' trailer
+    private static URL stripTimestampHMS(URL url, String parameter, String trailer, boolean inQuery)
+            throws MalformedURLException {
+        String regex = parameter + "([\\d]+[hH])?([\\d]+[mM])?[\\d]+[sS]" + trailer + "&?";
+        return stripTimestampCommon(url, inQuery, regex);
+    }
+
+
+    // Remove timestamp in 1234 format
+    private static URL stripTimestampS(URL url, String parameter, String trailer, boolean inQuery)
+            throws MalformedURLException {
+        String regex = parameter + "[\\d]+" + trailer + "&?";
+        return stripTimestampCommon(url, inQuery, regex);
+    }
+
+    private static URL stripTimestampCommon(URL url, boolean inQuery, String regex)
+            throws MalformedURLException {
+        String value;
+        if (inQuery) {
+            value = url.getQuery();
+        } else {
+            value = url.getRef();
+        }
+        if (value == null) {
+            return url;
+        }
+        String newValue = value.replaceAll(regex, "");
+        String replaced = url.toString().replaceFirst(value, newValue);
+        if (inQuery && replaced.endsWith("&")) {
+            replaced = replaced.substring(0, replaced.length() - 1);
+        }
+        return new URL(replaced);
+    }
+
+    private static URL formatUrlWithSeek(URL url, String position, String parameter, String trailer,
+                                         boolean inQuery) throws MalformedURLException {
+        String value;
+        String separator;
+        String newValue;
+        if (inQuery) {
+            value = url.getQuery();
+            separator = "?";
+        } else {
+            value = url.getRef();
+            separator = "#";
+        }
+        if (value == null) {
+            newValue = String.format(Locale.getDefault(), "%s%s%s%s%s",
+                    url.toString(), separator, parameter, position, trailer);
+            return new URL(newValue);
+        }
+        if (inQuery) {
+            newValue = String.format(Locale.getDefault(), "%s&%s%s%s",
+                    value, parameter, position, trailer);
+        } else {
+            newValue = String.format(Locale.getDefault(), "%s%s%s",
+                    parameter, position, trailer);
+        }
+        return new URL(url.toString().replaceFirst(value, newValue));
+    }
+}

src/org/kde/kdeconnect/Plugins/MprisPlugin/MprisActivity.java

@@ -20,9 +20,12 @@
 
 package org.kde.kdeconnect.Plugins.MprisPlugin;
 
+import android.content.ActivityNotFoundException;
+import android.content.Intent;
 import android.content.SharedPreferences;
 import android.graphics.Bitmap;
 import android.graphics.drawable.Drawable;
+import android.net.Uri;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Message;
@@ -37,15 +40,18 @@ import android.widget.LinearLayout;
 import android.widget.SeekBar;
 import android.widget.Spinner;
 import android.widget.TextView;
+import android.widget.Toast;
 
 import org.kde.kdeconnect.Backends.BaseLink;
 import org.kde.kdeconnect.Backends.BaseLinkProvider;
 import org.kde.kdeconnect.BackgroundService;
+import org.kde.kdeconnect.Helpers.VideoUrlsHelper;
 import org.kde.kdeconnect.NetworkPacket;
 import org.kde.kdeconnect.Plugins.SystemvolumePlugin.SystemvolumeFragment;
 import org.kde.kdeconnect.UserInterface.ThemeUtil;
 import org.kde.kdeconnect_tp.R;
 
+import java.net.MalformedURLException;
 import java.util.List;
 
 import androidx.annotation.NonNull;
@@ -77,6 +83,9 @@ public class MprisActivity extends AppCompatActivity {
     @BindView(R.id.ff_button)
     ImageButton ffButton;
 
+    @BindView(R.id.open_url_button)
+    ImageButton openUrlButton;
+
     @BindView(R.id.time_textview)
     TextView timeText;
 
@@ -288,6 +297,7 @@ public class MprisActivity extends AppCompatActivity {
         volumeLayout.setVisibility(playerStatus.isSetVolumeAllowed() ? View.VISIBLE : View.GONE);
         rewButton.setVisibility(playerStatus.isSeekAllowed() ? View.VISIBLE : View.GONE);
         ffButton.setVisibility(playerStatus.isSeekAllowed() ? View.VISIBLE : View.GONE);
+        openUrlButton.setVisibility(playerStatus.getUrl() != null ? View.VISIBLE : View.GONE);
 
         //Show and hide previous/next buttons simultaneously
         if (playerStatus.isGoPreviousAllowed() || playerStatus.isGoNextAllowed()) {
@@ -387,6 +397,23 @@ public class MprisActivity extends AppCompatActivity {
 
         performActionOnClick(ffButton, p -> p.seek(interval_time));
 
+        performActionOnClick(openUrlButton, p -> {
+            String url = p.getUrl();
+            try {
+                url = VideoUrlsHelper.formatUriWithSeek(p.getUrl(), p.getPosition()).toString();
+            } catch (MalformedURLException e) {
+                e.printStackTrace();
+                Toast.makeText(getApplicationContext(), String.format("%s '%s'", getString(R.string.cant_format_seek_uri), p.getUrl()), Toast.LENGTH_LONG).show();
+            }
+            try {
+                Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
+                startActivity(browserIntent);
+            } catch (ActivityNotFoundException e) {
+                e.printStackTrace();
+                Toast.makeText(getApplicationContext(), String.format("%s '%s'", getString(R.string.cant_open_url), p.getUrl()), Toast.LENGTH_LONG).show();
+            }
+        });
+
         performActionOnClick(nextButton, MprisPlugin.MprisPlayer::next);
 
         performActionOnClick(stopButton, MprisPlugin.MprisPlayer::stop);

src/org/kde/kdeconnect/Plugins/MprisPlugin/MprisPlugin.java

@@ -20,6 +20,7 @@
 
 package org.kde.kdeconnect.Plugins.MprisPlugin;
 
+import android.annotation.NonNull;
 import android.app.Activity;
 import android.content.Intent;
 import android.graphics.Bitmap;
@@ -53,6 +54,7 @@ public class MprisPlugin extends Plugin {
         private String artist = "";
         private String album = "";
         private String albumArtUrl = "";
+        private String url = "";
         private int volume = 50;
         private long length = -1;
         private long lastPosition = 0;
@@ -136,6 +138,11 @@ public class MprisPlugin extends Plugin {
             return AlbumArtCache.getAlbumArt(albumArtUrl, MprisPlugin.this, player);
         }
 
+        @NonNull
+        public String getUrl() {
+            return url;
+        }
+
         public boolean isSetVolumeAllowed() {
             return !isSpotify();
         }
@@ -282,6 +289,7 @@ public class MprisPlugin extends Plugin {
                 playerStatus.title = np.getString("title", playerStatus.title);
                 playerStatus.artist = np.getString("artist", playerStatus.artist);
                 playerStatus.album = np.getString("album", playerStatus.album);
+                playerStatus.url = np.getString("url", playerStatus.url);
                 playerStatus.volume = np.getInt("volume", playerStatus.volume);
                 playerStatus.length = np.getLong("length", playerStatus.length);
                 if (np.has("pos")) {