feat: remove tracking parameter from URLs

mastodon/src/main/java/org/joinmastodon/android/GlobalUserPreferences.java

@@ -80,6 +80,7 @@ public class GlobalUserPreferences{
 	public static boolean mentionRebloggerAutomatically;
 	public static boolean showPostsWithoutAlt;
 	public static boolean showMediaPreview;
+	public static boolean removeTrackingParams;
 
 	public static SharedPreferences getPrefs(){
 		return MastodonApp.context.getSharedPreferences("global", Context.MODE_PRIVATE);
@@ -160,6 +161,7 @@ public static void load(){
 		mentionRebloggerAutomatically=prefs.getBoolean("mentionRebloggerAutomatically", false);
 		showPostsWithoutAlt=prefs.getBoolean("showPostsWithoutAlt", true);
 		showMediaPreview=prefs.getBoolean("showMediaPreview", true);
+		removeTrackingParams=prefs.getBoolean("removeTrackingParams", true);
 
 		theme=ThemePreference.values()[prefs.getInt("theme", 0)];
 
@@ -234,6 +236,7 @@ public static void save(){
 				.putBoolean("enableDeleteNotifications", enableDeleteNotifications)
 				.putBoolean("showPostsWithoutAlt", showPostsWithoutAlt)
 				.putBoolean("showMediaPreview", showMediaPreview)
+				.putBoolean("removeTrackingParams", removeTrackingParams)
 
 				.apply();
 	}

mastodon/src/main/java/org/joinmastodon/android/fragments/ComposeFragment.java

@@ -99,6 +99,7 @@
 import org.joinmastodon.android.ui.text.ComposeHashtagOrMentionSpan;
 import org.joinmastodon.android.ui.text.HtmlParser;
 import org.joinmastodon.android.ui.utils.SimpleTextWatcher;
+import org.joinmastodon.android.utils.Tracking;
 import org.joinmastodon.android.utils.TransferSpeedTracker;
 import org.joinmastodon.android.ui.utils.UiUtils;
 import org.joinmastodon.android.ui.viewcontrollers.ComposeAutocompleteViewController;
@@ -1175,6 +1176,8 @@ private void publish(boolean preview){
 
 	private void actuallyPublish(boolean preview){
 		String text=mainEditText.getText().toString();
+		if(GlobalUserPreferences.removeTrackingParams)
+			text=Tracking.cleanUrlsInText(text);
 		CreateStatus.Request req=new CreateStatus.Request();
 		if("bottom".equals(postLang.encoding)){
 			text=new StatusTextEncoder(Bottom::encode).encode(text);

mastodon/src/main/java/org/joinmastodon/android/fragments/settings/SettingsPrivacyFragment.java

@@ -25,7 +25,7 @@ public class SettingsPrivacyFragment extends BaseSettingsFragment<Void>{
 	private Instance instance;
 
 	//MOSHIDON
-	private CheckableListItem<Void> unlistedRepliesItem;
+	private CheckableListItem<Void> unlistedRepliesItem, removeTrackingParams;
 
 
 	@Override
@@ -38,7 +38,8 @@ public void onCreate(Bundle savedInstanceState){
 		privacy=self.source.privacy;
 		onDataLoaded(List.of(
 				privacyItem=new ListItem<>(R.string.sk_settings_default_visibility, getPrivacyString(privacy), R.drawable.ic_fluent_eye_24_regular, this::onPrivacyClick, 0, false),
-				unlistedRepliesItem=new CheckableListItem<>(R.string.mo_change_default_reply_visibility_to_unlisted, R.string.mo_setting_default_reply_privacy_summary, CheckableListItem.Style.SWITCH, GlobalUserPreferences.defaultToUnlistedReplies, R.drawable.ic_fluent_lock_open_24_regular, i->toggleCheckableItem(unlistedRepliesItem), true),
+				unlistedRepliesItem=new CheckableListItem<>(R.string.mo_change_default_reply_visibility_to_unlisted, R.string.mo_setting_default_reply_privacy_summary, CheckableListItem.Style.SWITCH, GlobalUserPreferences.defaultToUnlistedReplies, R.drawable.ic_fluent_lock_open_24_regular, i->toggleCheckableItem(unlistedRepliesItem)),
+				removeTrackingParams=new CheckableListItem<>(R.string.mo_settings_remove_tracking_params, R.string.mo_settings_remove_tracking_params_summary, CheckableListItem.Style.SWITCH, GlobalUserPreferences.removeTrackingParams, R.drawable.ic_fluent_eye_tracking_off_24_filled, i->toggleCheckableItem(removeTrackingParams), true),
 				lockedItem=new CheckableListItem<>(R.string.sk_settings_lock_account, 0, CheckableListItem.Style.SWITCH, self.locked, R.drawable.ic_fluent_person_available_24_regular, i->toggleCheckableItem(lockedItem))
 		));
 
@@ -89,6 +90,7 @@ private void onPrivacyClick(ListItem<?> item_){
 	public void onPause(){
 		super.onPause();
 		GlobalUserPreferences.defaultToUnlistedReplies=unlistedRepliesItem.checked;
+		GlobalUserPreferences.removeTrackingParams=removeTrackingParams.checked;
 		GlobalUserPreferences.save();
 		AccountSession s=AccountSessionManager.get(accountID);
 		Account self=s.self;

mastodon/src/main/java/org/joinmastodon/android/ui/utils/UiUtils.java

@@ -125,6 +125,7 @@
 import org.joinmastodon.android.ui.sheets.MuteAccountConfirmationSheet;
 import org.joinmastodon.android.ui.text.CustomEmojiSpan;
 import org.joinmastodon.android.ui.text.HtmlParser;
+import org.joinmastodon.android.utils.Tracking;
 import org.parceler.Parcels;
 
 import java.io.File;
@@ -196,6 +197,8 @@ private UiUtils() {
 	}
 
 	public static void launchWebBrowser(Context context, String url) {
+		if(GlobalUserPreferences.removeTrackingParams)
+			url=Tracking.removeTrackingParameters(url);
 		try {
 			if (GlobalUserPreferences.useCustomTabs) {
 				new CustomTabsIntent.Builder()
@@ -1480,6 +1483,8 @@ public void onError(ErrorResponse error) {
 	}
 
 	public static void copyText(View v, String text) {
+		if(GlobalUserPreferences.removeTrackingParams)
+			text=Tracking.cleanUrlsInText(text);
 		Context context = v.getContext();
 		context.getSystemService(ClipboardManager.class).setPrimaryClip(ClipData.newPlainText(null, text));
 		if (Build.VERSION.SDK_INT < Build.VERSION_CODES.TIRAMISU || UiUtils.isMIUI()) { // Android 13+ SystemUI shows its own thing when you put things into the clipboard

mastodon/src/main/java/org/joinmastodon/android/utils/Tracking.java

@@ -0,0 +1,107 @@
+package org.joinmastodon.android.utils;
+
+import android.net.Uri;
+import android.util.Patterns;
+
+import androidx.annotation.NonNull;
+
+import java.util.Arrays;
+import java.util.regex.Matcher;
+
+// Inspired by https://github.com/GeopJr/Tuba/blob/91a036edff9ab1ffb38d5b54a33023e5db551051/src/Utils/Tracking.vala
+
+public class Tracking{
+	/* https://github.com/brave/brave-core/blob/face8d58ab81422480c8c05b9ba5d518e1a2d227/components/query_filter/utils.cc#L23-L119 */
+	private static final String[] TRACKING_IDS={
+			// Strip any utm_ based ones
+			"utm_",
+			// https://github.com/brave/brave-browser/issues/4239
+			"fbclid", "gclid", "msclkid", "mc_eid",
+			// New Facebook one
+			"mibexid",
+			// https://github.com/brave/brave-browser/issues/9879
+			"dclid",
+			// https://github.com/brave/brave-browser/issues/13644
+			"oly_anon_id", "oly_enc_id",
+			// https://github.com/brave/brave-browser/issues/11579
+			"_openstat",
+			// https://github.com/brave/brave-browser/issues/11817
+			"vero_conv", "vero_id",
+			// https://github.com/brave/brave-browser/issues/13647
+			"wickedid",
+			// https://github.com/brave/brave-browser/issues/11578
+			"yclid",
+			// https://github.com/brave/brave-browser/issues/8975
+			"__s",
+			// https://github.com/brave/brave-browser/issues/17451
+			"rb_clickid",
+			// https://github.com/brave/brave-browser/issues/17452
+			"s_cid",
+			// https://github.com/brave/brave-browser/issues/17507
+			"ml_subscriber", "ml_subscriber_hash",
+			// https://github.com/brave/brave-browser/issues/18020
+			"twclid",
+			// https://github.com/brave/brave-browser/issues/18758
+			"gbraid", "wbraid",
+			// https://github.com/brave/brave-browser/issues/9019
+			"_hsenc", "__hssc", "__hstc", "__hsfp", "hsCtaTracking",
+			// https://github.com/brave/brave-browser/issues/22082
+			"oft_id", "oft_k", "oft_lk", "oft_d", "oft_c", "oft_ck", "oft_ids", "oft_sk",
+			// https://github.com/brave/brave-browser/issues/11580
+			"igshid",
+			// Instagram Threads
+			"ad_id", "adset_id", "campaign_id", "ad_name", "adset_name", "campaign_name", "placement",
+			// Reddit
+			"share_id", "ref", "ref_share",
+	};
+
+	/**
+	 * Tries to remove tracking parameters from a URL.
+	 *
+	 * @param url The original URL with tracking parameters
+	 * @return The URL with the tracking parameters removed.
+	 */
+	@NonNull
+	public static String removeTrackingParameters(@NonNull String url){
+		Uri uri=Uri.parse(url);
+		if(uri==null)
+			return url;
+		Uri.Builder uriBuilder=uri.buildUpon().clearQuery();
+
+		// Iterate over existing parameters and add them back if they are not tracking parameters
+		for(String paramName : uri.getQueryParameterNames()){
+			if(!isTrackingParameter(paramName)){
+				for(String paramValue : uri.getQueryParameters(paramName)){
+					uriBuilder.appendQueryParameter(paramName, paramValue);
+				}
+			}
+		}
+
+		return uriBuilder.build().toString();
+	}
+
+	/**
+	 * Cleans URLs within the provided text, removing the tracking parameters from them.
+	 *
+	 * @param text The text that may contain URLs.
+	 * @return The given text with cleaned URLs.
+	 */
+	public static String cleanUrlsInText(String text){
+		Matcher matcher=Patterns.WEB_URL.matcher(text);
+		StringBuffer sb=new StringBuffer();
+
+		while(matcher.find()){
+			String url=matcher.group();
+			matcher.appendReplacement(sb, removeTrackingParameters(url));
+		}
+		matcher.appendTail(sb);
+		return sb.toString();
+	}
+
+	/**
+	 * Returns true if the given parameter is used for tracking.
+	 */
+	private static boolean isTrackingParameter(String parameter){
+		return Arrays.stream(TRACKING_IDS).anyMatch(trackingId->parameter.toLowerCase().contains(trackingId));
+	}
+}

mastodon/src/main/res/drawable/ic_fluent_eye_tracking_off_24_filled.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+  <path
+      android:pathData="M3.28,2.22a0.75,0.75 0,1 0,-1.06 1.06l0.127,0.127c-0.223,0.397 -0.35,0.855 -0.35,1.343v3.502l0.007,0.102a0.75,0.75 0,0 0,1.493 -0.102V4.75l0.007,-0.128 0.006,-0.051 3.675,3.675a7.573,7.573 0,0 0,-2.02 2.251,6.262 6.262,0 0,0 -0.358,0.716l-0.006,0.015c-0.002,0.005 -0.162,0.75 0.436,0.974a0.75,0.75 0,0 0,0.964 -0.436l0.001,-0.002 0.008,-0.02 0.044,-0.1c0.043,-0.09 0.11,-0.226 0.206,-0.391a6.072,6.072 0,0 1,1.8 -1.932l1.494,1.494a3.5,3.5 0,1 0,4.93 4.93l4.744,4.744a1.26,1.26 0,0 1,-0.18 0.013h-3.5l-0.103,0.007a0.75,0.75 0,0 0,0.102 1.493h3.5l0.168,-0.005a2.732,2.732 0,0 0,1.176 -0.345l0.128,0.128a0.75,0.75 0,0 0,1.061 -1.06L3.28,2.22ZM11.45,8.268 L10.122,6.94A9.051,9.051 0,0 1,12 6.75c2.726,0 4.535,1.1 5.655,2.22a7.573,7.573 0,0 1,1.18 1.527,6.294 6.294,0 0,1 0.34,0.67l0.018,0.046 0.006,0.015 0.002,0.005v0.002l0.001,0.002a0.75,0.75 0,0 1,-0.439 0.965,0.758 0.758,0 0,1 -0.965,-0.438l-0.008,-0.02s-0.023,-0.055 -0.044,-0.1a4.776,4.776 0,0 0,-0.206 -0.391,6.073 6.073,0 0,0 -0.945,-1.223c-0.88,-0.88 -2.32,-1.78 -4.595,-1.78a8.22,8.22 0,0 0,-0.55 0.018ZM21.997,18.815l-1.5,-1.5V15.75a0.75,0.75 0,0 1,1.493 -0.102l0.007,0.102v3.065ZM6.682,3.5 L5.182,2h3.065a0.75,0.75 0,0 1,0.102 1.493l-0.102,0.007H6.682ZM2.747,15a0.75,0.75 0,0 1,0.743 0.648l0.007,0.102v3.502l0.007,0.128a1.25,1.25 0,0 0,1.115 1.116l0.128,0.006h3.5l0.102,0.007a0.75,0.75 0,0 1,0 1.486l-0.102,0.007h-3.5l-0.167,-0.005a2.75,2.75 0,0 1,-2.578 -2.57l-0.005,-0.175V15.75l0.007,-0.102A0.75,0.75 0,0 1,2.747 15ZM19.247,2l0.168,0.005a2.75,2.75 0,0 1,2.577 2.57l0.005,0.175v3.502l-0.007,0.102a0.75,0.75 0,0 1,-1.486 0l-0.007,-0.102V4.75l-0.006,-0.128a1.25,1.25 0,0 0,-1.116 -1.116l-0.128,-0.006h-3.5l-0.102,-0.007a0.75,0.75 0,0 1,0 -1.486L15.747,2h3.5Z"
+      android:fillColor="@color/fluent_default_icon_tint"/>
+</vector>

mastodon/src/main/res/values/strings_mo.xml

@@ -97,6 +97,7 @@
     <string name="mo_setting_haptic_feedback_summary">Vibrate when interacting with posts</string>
     <string name="mo_swap_bookmark_with_reblog_summary">Bookmark or reblog posts from the notification</string>
     <string name="mo_settings_show_posts_without_alt_summary">Posts will be hidden in all timelines, but can be revealed in threads and notifications</string>
+	<string name="mo_settings_remove_tracking_params_summary">Strip tracking information from links</string>
 
 <!--  Settings  -->
     <string name="mo_notification_audience_settings">Notification Audience</string>
@@ -117,6 +118,7 @@
 	<string name="mo_settings_unifiedpush_warning_no_distributors">No UnifiedPush Distributors installed. You will not receive any notifications.</string>
 	<string name="mo_settings_unifiedpush_warning_disabled">UnifiedPush is not enabled. You will not receive any notifications.</string>
 	<string name="mo_settings_unifiedpush_enable">Enable</string>
+	<string name="mo_settings_remove_tracking_params">Private Links</string>
 
 	<!--	Temporary Strings. They exist in strings_sk.xml, but are not available on Megalodon's weblate-->
 	<string name="mo_muted_accounts">Muted accounts</string>