Implement Emoji transliteration

app/build.gradle

@@ -289,6 +289,9 @@ dependencies {
 
     // Needed for Armenian transliteration
     implementation 'org.ahocorasick:ahocorasick:0.6.3'
+
+    // Needed for Emoji transliteration
+    implementation 'net.fellbaum:jemoji:1.6.0'
 }
 
 preBuild.dependsOn(":GBDaoGenerator:genSources")

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/util/language/LanguageUtils.java

@@ -40,6 +40,7 @@ import nodomain.freeyourgadget.gadgetbridge.util.language.impl.BengaliTransliter
 import nodomain.freeyourgadget.gadgetbridge.util.language.impl.CommonSymbolsTransliterator;
 import nodomain.freeyourgadget.gadgetbridge.util.language.impl.CroatianTransliterator;
 import nodomain.freeyourgadget.gadgetbridge.util.language.impl.CzechTransliterator;
+import nodomain.freeyourgadget.gadgetbridge.util.language.impl.EmojiTransliterator;
 import nodomain.freeyourgadget.gadgetbridge.util.language.impl.EstonianTransliterator;
 import nodomain.freeyourgadget.gadgetbridge.util.language.impl.ExtendedAsciiTransliterator;
 import nodomain.freeyourgadget.gadgetbridge.util.language.impl.FlattenToAsciiTransliterator;
@@ -90,6 +91,7 @@ public class LanguageUtils {
         put("turkish", new TurkishTransliterator());
         put("ukranian", new UkranianTransliterator());
         put("armenian", new ArmenianTransliterator());
+        put("emoji", new EmojiTransliterator());
     }};
 
     /**

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/util/language/impl/EmojiTransliterator.java

@@ -0,0 +1,12 @@
+package nodomain.freeyourgadget.gadgetbridge.util.language.impl;
+
+import net.fellbaum.jemoji.EmojiManager;
+import java.util.Objects;
+import nodomain.freeyourgadget.gadgetbridge.util.language.Transliterator;
+
+public class EmojiTransliterator implements Transliterator {
+    @Override
+    public String transliterate(String txt) {
+        return EmojiManager.replaceAllEmojis(txt, emoji -> Objects.requireNonNullElse(emoji.getAllAliases().get(0), ""));
+    }
+}

app/src/main/res/values/arrays.xml

@@ -4612,6 +4612,7 @@
         <item>@string/ukranian</item>
         <item>@string/hungarian</item>
         <item>@string/armenian</item>
+        <item>@string/emoji</item>
     </string-array>
 
     <string-array name="pref_transliteration_languages_values">
@@ -4640,6 +4641,7 @@
         <item>ukranian</item>
         <item>hungarian</item>
         <item>armenian</item>
+        <item>emoji</item>
     </string-array>
 
     <string-array name="pref_transliteration_languages_default">

app/src/main/res/values/strings.xml

@@ -1265,6 +1265,7 @@
     <string name="catalan">Catalan</string>
     <string name="finnish">Finnish</string>
     <string name="bahasa_melayu">Bahasa Melayu</string>
+    <string name="emoji">Emoji</string>
     <string name="FetchActivityOperation_about_to_transfer_since">About to transfer data since %1$s</string>
     <string name="waiting_for_reconnect">Waiting for reconnect</string>
     <string name="activity_prefs_about_you">About you</string>

app/src/test/java/nodomain/freeyourgadget/gadgetbridge/test/EmojiTransliteratorTest.java

@@ -0,0 +1,21 @@
+package nodomain.freeyourgadget.gadgetbridge.test;
+
+import junit.framework.TestCase;
+import org.junit.Test;
+import org.junit.Assert;
+
+import nodomain.freeyourgadget.gadgetbridge.util.language.impl.EmojiTransliterator;
+
+public class EmojiTransliteratorTest extends TestCase {
+
+    @Test
+    public void testSimpleEmoji() {
+        Assert.assertEquals(":heart:", new EmojiTransliterator().transliterate("❤\uFE0F"));
+        Assert.assertEquals(":grinning:", new EmojiTransliterator().transliterate("\uD83D\uDE00"));
+    }
+
+    @Test
+    public void testCompoundEmoji() {
+        Assert.assertEquals(":factory_worker::skin-tone-4:", new EmojiTransliterator().transliterate("\uD83E\uDDD1\uD83C\uDFFE\u200D\uD83C\uDFED"));
+    }
+}