Moves emoji parsers to commons and

2024-02-22 13:56:56 -05:00
parent 8ff4ac3709
commit 860c3773c3
17 changed files with 632 additions and 399 deletions
@@ -1,55 +0,0 @@
-/**
- * Copyright (c) 2024 Vitor Pamplona
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy of
- * this software and associated documentation files (the "Software"), to deal in
- * the Software without restriction, including without limitation the rights to use,
- * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
- * Software, and to permit persons to whom the Software is furnished to do so,
- * subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
- * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-package com.vitorpamplona.amethyst.service
-
-import androidx.compose.runtime.Immutable
-import java.util.regex.Pattern
-
-@Immutable
-class Nip30CustomEmoji {
-    val customEmojiPattern: Pattern =
-        Pattern.compile("\\:([A-Za-z0-9_\\-]+)\\:", Pattern.CASE_INSENSITIVE)
-
-    fun buildArray(input: String): List<String> {
-        val matcher = customEmojiPattern.matcher(input)
-        val list = mutableListOf<String>()
-        while (matcher.find()) {
-            list.add(matcher.group())
-        }
-
-        if (list.isEmpty()) {
-            return listOf(input)
-        }
-
-        val regularChars = input.split(customEmojiPattern.toRegex())
-
-        val finalList = mutableListOf<String>()
-        var index = 0
-        for (e in regularChars) {
-            finalList.add(e)
-            if (index < list.size) {
-                finalList.add(list[index])
-            }
-            index++
-        }
-        return finalList
-    }
-}
@@ -30,7 +30,6 @@ import androidx.compose.material3.LocalTextStyle
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.Immutable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.derivedStateOf
 import androidx.compose.runtime.getValue
@@ -59,21 +58,17 @@ import androidx.compose.ui.unit.sp
 import coil.compose.AsyncImage
 import com.vitorpamplona.amethyst.model.Note
 import com.vitorpamplona.amethyst.model.User
-import com.vitorpamplona.amethyst.service.Nip30CustomEmoji
 import com.vitorpamplona.amethyst.ui.note.LoadChannel
 import com.vitorpamplona.amethyst.ui.note.toShortenHex
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.quartz.encoders.Nip19
+import com.vitorpamplona.quartz.encoders.Nip30CustomEmoji
 import com.vitorpamplona.quartz.events.ChannelCreateEvent
 import com.vitorpamplona.quartz.events.ImmutableListOfLists
 import com.vitorpamplona.quartz.events.PrivateDmEvent
 import com.vitorpamplona.quartz.events.toImmutableListOfLists
 import kotlinx.collections.immutable.ImmutableList
 import kotlinx.collections.immutable.ImmutableMap
-import kotlinx.collections.immutable.persistentListOf
-import kotlinx.collections.immutable.toImmutableList
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.launch

@Composable
 fun ClickableRoute(
@@ -155,7 +150,7 @@ private fun DisplayNoteLink(

    val channelHex = remember(noteState) { note.channelHex() }
    val noteIdDisplayNote = remember(noteState) { "@${note.idDisplayNote()}" }
-    val addedCharts = remember { "${nip19.additionalChars}" }
+    val addedCharts = nip19.additionalChars

    if (note.event is ChannelCreateEvent || nip19.kind == ChannelCreateEvent.KIND) {
        CreateClickableText(
@@ -216,11 +211,10 @@ private fun DisplayAddress(

        val route = remember(noteState) { "Note/${nip19.hex}" }
        val displayName = remember(noteState) { "@${noteState?.note?.idDisplayNote()}" }
-        val addedCharts = remember { "${nip19.additionalChars}" }

        CreateClickableText(
            clickablePart = displayName,
-            suffix = addedCharts,
+            suffix = nip19.additionalChars,
            route = route,
            nav = nav,
        )
@@ -281,12 +275,15 @@ private fun RenderUserAsClickableText(
    userDisplayName?.let {
        CreateClickableTextWithEmoji(
            clickablePart = it,
-            suffix = nip19.additionalChars,
            maxLines = 1,
            route = route,
            nav = nav,
            tags = userTags,
        )
+
+        nip19.additionalChars.ifBlank { null }?.let {
+            Text(text = it, maxLines = 1)
+        }
    }
 }

@@ -367,6 +364,74 @@ fun ClickableText(
    )
 }

+@Composable
+fun CustomEmojiChecker(
+    text: String,
+    tags: ImmutableListOfLists<String>?,
+    onRegularText: @Composable (String) -> Unit,
+    onEmojiText: @Composable (ImmutableList<Nip30CustomEmoji.Renderable>) -> Unit,
+) {
+    val mayContainEmoji by remember(text, tags) {
+        mutableStateOf(Nip30CustomEmoji.fastMightContainEmoji(text, tags))
+    }
+
+    if (mayContainEmoji) {
+        var emojiList by
+            remember(text, tags) {
+                mutableStateOf<ImmutableList<Nip30CustomEmoji.Renderable>?>(null)
+            }
+
+        LaunchedEffect(text, tags) {
+            val newEmojiList = Nip30CustomEmoji.assembleAnnotatedList(text, tags)
+            if (newEmojiList != null) {
+                emojiList = newEmojiList
+            }
+        }
+
+        emojiList?.let {
+            onEmojiText(it)
+        } ?: run {
+            onRegularText(text)
+        }
+    } else {
+        onRegularText(text)
+    }
+}
+
+@Composable
+fun CustomEmojiChecker(
+    text: String,
+    emojis: ImmutableMap<String, String>,
+    onRegularText: @Composable (String) -> Unit,
+    onEmojiText: @Composable (ImmutableList<Nip30CustomEmoji.Renderable>) -> Unit,
+) {
+    val mayContainEmoji by remember(text, emojis) {
+        mutableStateOf(Nip30CustomEmoji.fastMightContainEmoji(text, emojis))
+    }
+
+    if (mayContainEmoji) {
+        var emojiList by
+            remember(text, emojis) {
+                mutableStateOf<ImmutableList<Nip30CustomEmoji.Renderable>?>(null)
+            }
+
+        LaunchedEffect(text, emojis) {
+            val newEmojiList = Nip30CustomEmoji.assembleAnnotatedList(text, emojis)
+            if (newEmojiList != null) {
+                emojiList = newEmojiList
+            }
+        }
+
+        emojiList?.let {
+            onEmojiText(it)
+        } ?: run {
+            onRegularText(text)
+        }
+    } else {
+        onRegularText(text)
+    }
+}
+
@Composable
 fun CreateTextWithEmoji(
    text: String,
@@ -379,52 +444,40 @@ fun CreateTextWithEmoji(
    overflow: TextOverflow = TextOverflow.Clip,
    modifier: Modifier = Modifier,
 ) {
-    var emojiList by remember(text) { mutableStateOf<ImmutableList<Renderable>>(persistentListOf()) }
-
-    LaunchedEffect(key1 = text) {
-        launch(Dispatchers.Default) {
-            val emojis =
-                tags?.lists?.filter { it.size > 2 && it[0] == "emoji" }?.associate { ":${it[1]}:" to it[2] }
-                    ?: emptyMap()
-
-            if (emojis.isNotEmpty()) {
-                val newEmojiList = assembleAnnotatedList(text, emojis)
-                if (newEmojiList.isNotEmpty()) {
-                    emojiList = newEmojiList.toImmutableList()
-                }
-            }
-        }
-    }
-
    val textColor =
        color.takeOrElse { LocalTextStyle.current.color.takeOrElse { LocalContentColor.current } }

-    if (emojiList.isEmpty()) {
-        Text(
-            text = text,
-            color = textColor,
-            textAlign = textAlign,
-            fontWeight = fontWeight,
-            fontSize = fontSize,
-            maxLines = maxLines,
-            overflow = overflow,
-            modifier = modifier,
-        )
-    } else {
-        val style =
-            LocalTextStyle.current
-                .merge(
-                    TextStyle(
-                        color = textColor,
-                        textAlign = TextAlign.Unspecified,
-                        fontWeight = fontWeight,
-                        fontSize = fontSize,
-                    ),
-                )
-                .toSpanStyle()
+    CustomEmojiChecker(
+        text,
+        tags,
+        onEmojiText = {
+            val style =
+                LocalTextStyle.current
+                    .merge(
+                        TextStyle(
+                            color = textColor,
+                            textAlign = TextAlign.Unspecified,
+                            fontWeight = fontWeight,
+                            fontSize = fontSize,
+                        ),
+                    )
+                    .toSpanStyle()

-        InLineIconRenderer(emojiList, style, fontSize, maxLines, overflow, modifier)
-    }
+            InLineIconRenderer(it, style, fontSize, maxLines, overflow, modifier)
+        },
+        onRegularText = {
+            Text(
+                text = it,
+                color = textColor,
+                textAlign = textAlign,
+                fontWeight = fontWeight,
+                fontSize = fontSize,
+                maxLines = maxLines,
+                overflow = overflow,
+                modifier = modifier,
+            )
+        },
+    )
 }

@Composable
@@ -439,51 +492,43 @@ fun CreateTextWithEmoji(
    overflow: TextOverflow = TextOverflow.Clip,
    modifier: Modifier = Modifier,
 ) {
-    var emojiList by remember(text) { mutableStateOf<ImmutableList<Renderable>>(persistentListOf()) }
-
-    if (emojis.isNotEmpty()) {
-        LaunchedEffect(key1 = text) {
-            launch(Dispatchers.Default) {
-                val newEmojiList = assembleAnnotatedList(text, emojis)
-                if (newEmojiList.isNotEmpty()) {
-                    emojiList = newEmojiList.toImmutableList()
-                }
-            }
-        }
-    }
-
    val textColor =
        color.takeOrElse { LocalTextStyle.current.color.takeOrElse { LocalContentColor.current } }

-    if (emojiList.isEmpty()) {
-        Text(
-            text = text,
-            color = textColor,
-            textAlign = textAlign,
-            fontWeight = fontWeight,
-            fontSize = fontSize,
-            maxLines = maxLines,
-            overflow = overflow,
-            modifier = modifier,
-        )
-    } else {
-        val currentStyle = LocalTextStyle.current
-        val style =
-            remember(currentStyle) {
-                currentStyle
-                    .merge(
-                        TextStyle(
-                            color = textColor,
-                            textAlign = TextAlign.Unspecified,
-                            fontWeight = fontWeight,
-                            fontSize = fontSize,
-                        ),
-                    )
-                    .toSpanStyle()
-            }
+    CustomEmojiChecker(
+        text,
+        emojis,
+        onEmojiText = {
+            val currentStyle = LocalTextStyle.current
+            val style =
+                remember(currentStyle) {
+                    currentStyle
+                        .merge(
+                            TextStyle(
+                                color = textColor,
+                                textAlign = TextAlign.Unspecified,
+                                fontWeight = fontWeight,
+                                fontSize = fontSize,
+                            ),
+                        )
+                        .toSpanStyle()
+                }

-        InLineIconRenderer(emojiList, style, fontSize, maxLines, overflow, modifier)
-    }
+            InLineIconRenderer(it, style, fontSize, maxLines, overflow, modifier)
+        },
+        onRegularText = {
+            Text(
+                text = it,
+                color = textColor,
+                textAlign = textAlign,
+                fontWeight = fontWeight,
+                fontSize = fontSize,
+                maxLines = maxLines,
+                overflow = overflow,
+                modifier = modifier,
+            )
+        },
+    )
 }

@Composable
@@ -494,46 +539,26 @@ fun CreateClickableTextWithEmoji(
    style: TextStyle,
    onClick: (Int) -> Unit,
 ) {
-    var emojiList by
-        remember(clickablePart) { mutableStateOf<ImmutableList<Renderable>>(persistentListOf()) }
-
-    LaunchedEffect(key1 = clickablePart) {
-        launch(Dispatchers.Default) {
-            val emojis =
-                tags?.lists?.filter { it.size > 2 && it[0] == "emoji" }?.associate { ":${it[1]}:" to it[2] }
-                    ?: emptyMap()
-
-            if (emojis.isNotEmpty()) {
-                val newEmojiList = assembleAnnotatedList(clickablePart, emojis)
-                if (newEmojiList.isNotEmpty()) {
-                    emojiList = newEmojiList.toImmutableList()
-                }
-            }
-        }
-    }
-
-    if (emojiList.isEmpty()) {
-        ClickableText(
-            text = AnnotatedString(clickablePart),
-            style = style,
-            maxLines = maxLines,
-            onClick = onClick,
-        )
-    } else {
-        ClickableInLineIconRenderer(emojiList, maxLines, style.toSpanStyle()) { onClick(it) }
-    }
+    CustomEmojiChecker(
+        text = clickablePart,
+        tags = tags,
+        onRegularText = {
+            ClickableText(
+                text = AnnotatedString(clickablePart),
+                style = style,
+                maxLines = maxLines,
+                onClick = onClick,
+            )
+        },
+        onEmojiText = {
+            ClickableInLineIconRenderer(it, maxLines, style.toSpanStyle()) { onClick(it) }
+        },
+    )
 }

-@Immutable
-data class DoubleEmojiList(
-    val part1: ImmutableList<Renderable>,
-    val part2: ImmutableList<Renderable>,
-)
-
@Composable
 fun CreateClickableTextWithEmoji(
    clickablePart: String,
-    suffix: String?,
    maxLines: Int = Int.MAX_VALUE,
    overrideColor: Color? = null,
    fontWeight: FontWeight = FontWeight.Normal,
@@ -541,84 +566,33 @@ fun CreateClickableTextWithEmoji(
    nav: (String) -> Unit,
    tags: ImmutableListOfLists<String>?,
 ) {
-    var emojiLists by remember(clickablePart) { mutableStateOf<DoubleEmojiList?>(null) }
+    CustomEmojiChecker(
+        text = clickablePart,
+        tags = tags,
+        onRegularText = {
+            CreateClickableText(it, null, maxLines, overrideColor, fontWeight, route, nav)
+        },
+        onEmojiText = {
+            val clickablePartStyle =
+                SpanStyle(
+                    color = overrideColor ?: MaterialTheme.colorScheme.primary,
+                    fontWeight = fontWeight,
+                )

-    LaunchedEffect(key1 = clickablePart) {
-        launch(Dispatchers.Default) {
-            val emojis =
-                tags?.lists?.filter { it.size > 2 && it[0] == "emoji" }?.associate { ":${it[1]}:" to it[2] }
-                    ?: emptyMap()
-
-            if (emojis.isNotEmpty()) {
-                val newEmojiList1 = assembleAnnotatedList(clickablePart, emojis)
-                val newEmojiList2 =
-                    suffix?.let { assembleAnnotatedList(it, emojis) } ?: emptyList<Renderable>()
-
-                if (newEmojiList1.isNotEmpty() || newEmojiList2.isNotEmpty()) {
-                    emojiLists =
-                        DoubleEmojiList(newEmojiList1.toImmutableList(), newEmojiList2.toImmutableList())
-                }
+            ClickableInLineIconRenderer(
+                it,
+                maxLines,
+                clickablePartStyle,
+            ) {
+                nav(route)
            }
-        }
-    }
-
-    if (emojiLists == null) {
-        CreateClickableText(clickablePart, suffix, maxLines, overrideColor, fontWeight, route, nav)
-    } else {
-        val clickablePartStyle =
-            SpanStyle(
-                color = overrideColor ?: MaterialTheme.colorScheme.primary,
-                fontWeight = fontWeight,
-            )
-
-        val nonClickablePartStyle =
-            SpanStyle(
-                color = overrideColor ?: MaterialTheme.colorScheme.onBackground,
-                fontWeight = fontWeight,
-            )
-
-        ClickableInLineIconRenderer(
-            emojiLists!!.part1,
-            maxLines,
-            clickablePartStyle,
-        ) {
-            nav(route)
-        }
-
-        InLineIconRenderer(
-            emojiLists!!.part2,
-            nonClickablePartStyle,
-            maxLines = maxLines,
-        )
-    }
+        },
+    )
 }

-suspend fun assembleAnnotatedList(
-    text: String,
-    emojis: Map<String, String>,
-): ImmutableList<Renderable> {
-    return Nip30CustomEmoji()
-        .buildArray(text)
-        .map {
-            val url = emojis[it]
-            if (url != null) {
-                ImageUrlType(url)
-            } else {
-                TextType(it)
-            }
-        }
-        .toImmutableList()
-}
-
-@Immutable open class Renderable()
-
-@Immutable class TextType(val text: String) : Renderable()
-
-@Immutable class ImageUrlType(val url: String) : Renderable()
-
@Composable
 fun ClickableInLineIconRenderer(
-    wordsInOrder: ImmutableList<Renderable>,
+    wordsInOrder: ImmutableList<Nip30CustomEmoji.Renderable>,
    maxLines: Int = Int.MAX_VALUE,
    style: SpanStyle,
    onClick: (Int) -> Unit,
@@ -635,7 +609,7 @@ fun ClickableInLineIconRenderer(
    val inlineContent =
        wordsInOrder
            .mapIndexedNotNull { idx, value ->
-                if (value is ImageUrlType) {
+                if (value is Nip30CustomEmoji.ImageUrlType) {
                    Pair(
                        "inlineContent$idx",
                        InlineTextContent(
@@ -664,9 +638,9 @@ fun ClickableInLineIconRenderer(
                withStyle(
                    style,
                ) {
-                    if (value is TextType) {
+                    if (value is Nip30CustomEmoji.TextType) {
                        append(value.text)
-                    } else if (value is ImageUrlType) {
+                    } else if (value is Nip30CustomEmoji.ImageUrlType) {
                        appendInlineContent("inlineContent$idx", "[icon]")
                    }
                }
@@ -692,7 +666,7 @@ fun ClickableInLineIconRenderer(

@Composable
 fun InLineIconRenderer(
-    wordsInOrder: ImmutableList<Renderable>,
+    wordsInOrder: ImmutableList<Nip30CustomEmoji.Renderable>,
    style: SpanStyle,
    fontSize: TextUnit = TextUnit.Unspecified,
    maxLines: Int = Int.MAX_VALUE,
@@ -711,7 +685,7 @@ fun InLineIconRenderer(
    val inlineContent =
        wordsInOrder
            .mapIndexedNotNull { idx, value ->
-                if (value is ImageUrlType) {
+                if (value is Nip30CustomEmoji.ImageUrlType) {
                    Pair(
                        "inlineContent$idx",
                        InlineTextContent(
@@ -741,9 +715,9 @@ fun InLineIconRenderer(
                    withStyle(
                        style,
                    ) {
-                        if (value is TextType) {
+                        if (value is Nip30CustomEmoji.TextType) {
                            append(value.text)
-                        } else if (value is ImageUrlType) {
+                        } else if (value is Nip30CustomEmoji.ImageUrlType) {
                            appendInlineContent("inlineContent$idx", "[icon]")
                        }
                    }
@@ -65,6 +65,7 @@ import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.LayoutDirection
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.em
+import androidx.lifecycle.viewmodel.compose.viewModel
 import com.halilibo.richtext.markdown.Markdown
 import com.halilibo.richtext.markdown.MarkdownParseOptions
 import com.halilibo.richtext.ui.material3.Material3RichText
@@ -86,6 +87,7 @@ import com.vitorpamplona.amethyst.commons.RichTextViewerState
 import com.vitorpamplona.amethyst.commons.SchemelessUrlSegment
 import com.vitorpamplona.amethyst.commons.Segment
 import com.vitorpamplona.amethyst.commons.WithdrawSegment
+import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.HashtagIcon
 import com.vitorpamplona.amethyst.model.Note
 import com.vitorpamplona.amethyst.model.User
@@ -94,6 +96,7 @@ import com.vitorpamplona.amethyst.service.CachedRichTextParser
 import com.vitorpamplona.amethyst.ui.note.LoadUser
 import com.vitorpamplona.amethyst.ui.note.NoteCompose
 import com.vitorpamplona.amethyst.ui.note.toShortenHex
+import com.vitorpamplona.amethyst.ui.screen.SharedPreferencesViewModel
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.LoadedBechLink
 import com.vitorpamplona.amethyst.ui.theme.Font17SP
@@ -102,10 +105,14 @@ import com.vitorpamplona.amethyst.ui.theme.MarkdownTextStyle
 import com.vitorpamplona.amethyst.ui.theme.innerPostModifier
 import com.vitorpamplona.amethyst.ui.theme.markdownStyle
 import com.vitorpamplona.amethyst.ui.uriToRoute
+import com.vitorpamplona.quartz.crypto.KeyPair
 import com.vitorpamplona.quartz.encoders.Nip19
 import com.vitorpamplona.quartz.events.EmptyTagList
 import com.vitorpamplona.quartz.events.ImmutableListOfLists
+import fr.acinq.secp256k1.Hex
+import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
 import kotlinx.coroutines.launch

 fun isMarkdown(content: String): Boolean {
@@ -136,15 +143,9 @@ fun RichTextViewer(
    }
 }

-@Preview()
+@Preview
@Composable
 fun RenderRegularPreview() {
-    val backgroundColor = MaterialTheme.colorScheme.background
-    val backgroundColorState =
-        remember {
-            mutableStateOf(backgroundColor)
-        }
-
    val nav: (String) -> Unit = {}

    Column(modifier = Modifier.padding(10.dp)) {
@@ -171,6 +172,7 @@ fun RenderRegularPreview() {
                        nav = nav,
                    )
                }
+
                is HashTagSegment -> HashTag(word, nav)
                // is HashIndexUserSegment -> TagLink(word, accountViewModel, nav)
                // is HashIndexEventSegment -> TagLink(word, true, backgroundColorState, accountViewModel, nav)
@@ -178,27 +180,93 @@ fun RenderRegularPreview() {
                is RegularTextSegment -> Text(word.segmentText)
            }
        }
+    }
+}

-        RenderRegular(
-            "#Amethyst v0.84.1: ncryptsec support (NIP-49)",
-            EmptyTagList,
-        ) { word, state ->
-            when (word) {
-                // is ImageSegment -> ZoomableContentView(word.segmentText, state, accountViewModel)
-                // is LinkSegment -> LoadUrlPreview(word.segmentText, word.segmentText, accountViewModel)
-                is EmojiSegment -> RenderCustomEmoji(word.segmentText, state)
-                is InvoiceSegment -> MayBeInvoicePreview(word.segmentText)
-                is WithdrawSegment -> MayBeWithdrawal(word.segmentText)
-                // is CashuSegment -> CashuPreview(word.segmentText, accountViewModel)
-                is EmailSegment -> ClickableEmail(word.segmentText)
-                is PhoneSegment -> ClickablePhone(word.segmentText)
-                // is BechSegment -> BechLink(word.segmentText, true, backgroundColor, accountViewModel, nav)
-                is HashTagSegment -> HashTag(word, nav)
-                // is HashIndexUserSegment -> TagLink(word, accountViewModel, nav)
-                // is HashIndexEventSegment -> TagLink(word, true, backgroundColorState, accountViewModel, nav)
-                is SchemelessUrlSegment -> NoProtocolUrlRenderer(word)
-                is RegularTextSegment -> Text(word.segmentText)
-            }
+@Preview
+@Composable
+fun RenderRegularPreview2() {
+    val nav: (String) -> Unit = {}
+    RenderRegular(
+        "#Amethyst v0.84.1: ncryptsec support (NIP-49)",
+        EmptyTagList,
+    ) { word, state ->
+        when (word) {
+            // is ImageSegment -> ZoomableContentView(word.segmentText, state, accountViewModel)
+            // is LinkSegment -> LoadUrlPreview(word.segmentText, word.segmentText, accountViewModel)
+            is EmojiSegment -> RenderCustomEmoji(word.segmentText, state)
+            is InvoiceSegment -> MayBeInvoicePreview(word.segmentText)
+            is WithdrawSegment -> MayBeWithdrawal(word.segmentText)
+            // is CashuSegment -> CashuPreview(word.segmentText, accountViewModel)
+            is EmailSegment -> ClickableEmail(word.segmentText)
+            is PhoneSegment -> ClickablePhone(word.segmentText)
+            // is BechSegment -> BechLink(word.segmentText, true, backgroundColor, accountViewModel, nav)
+            is HashTagSegment -> HashTag(word, nav)
+            // is HashIndexUserSegment -> TagLink(word, accountViewModel, nav)
+            // is HashIndexEventSegment -> TagLink(word, true, backgroundColorState, accountViewModel, nav)
+            is SchemelessUrlSegment -> NoProtocolUrlRenderer(word)
+            is RegularTextSegment -> Text(word.segmentText)
+        }
+    }
+}
+
+@Composable
+fun mockAccountViewModel(): AccountViewModel {
+    val sharedPreferencesViewModel: SharedPreferencesViewModel = viewModel()
+    sharedPreferencesViewModel.init()
+
+    return AccountViewModel(
+        Account(
+            // blank keys
+            keyPair =
+                KeyPair(
+                    privKey = Hex.decode("0f761f8a5a481e26f06605a1d9b3e9eba7a107d351f43c43a57469b788274499"),
+                    pubKey = Hex.decode("989c3734c46abac7ce3ce229971581a5a6ee39cdd6aa7261a55823fa7f8c4799"),
+                    forcePubKeyCheck = false,
+                ),
+            scope = CoroutineScope(Dispatchers.IO + SupervisorJob()),
+        ),
+        sharedPreferencesViewModel.sharedPrefs,
+    )
+}
+
+@Preview
+@Composable
+fun RenderRegularPreview3() {
+    val tags =
+        ImmutableListOfLists(
+            arrayOf(
+                arrayOf("t", "ioメシヨソイゲーム"),
+                arrayOf("emoji", "_ri", "https://media.misskeyusercontent.com/emoji/_ri.png"),
+                arrayOf("emoji", "petthex_japanesecake", "https://media.misskeyusercontent.com/emoji/petthex_japanesecake.gif"),
+                arrayOf("emoji", "ai_nomming", "https://media.misskeyusercontent.com/misskey/f6294900-f678-43cc-bc36-3ee5deeca4c2.gif"),
+                arrayOf("proxy", "https://misskey.io/notes/9q0x6gtdysir03qh", "activitypub"),
+            ),
+        )
+    val nav: (String) -> Unit = {}
+    val accountViewModel = mockAccountViewModel()
+
+    RenderRegular(
+        "\u200B:_ri:\u200B\u200B:_ri:\u200Bはﾍﾞｲｸﾄﾞﾓﾁｮﾁｮ\u200B:petthex_japanesecake:\u200Bを食べました\u200B:ai_nomming:\u200B\n" +
+            "#ioメシヨソイゲーム\n" +
+            "https://misskey.io/play/9g3qza4jow",
+        tags,
+    ) { word, state ->
+        when (word) {
+            // is ImageSegment -> ZoomableContentView(word.segmentText, state, accountViewModel)
+            is LinkSegment -> LoadUrlPreview(word.segmentText, word.segmentText, accountViewModel)
+            is EmojiSegment -> RenderCustomEmoji(word.segmentText, state)
+            is InvoiceSegment -> MayBeInvoicePreview(word.segmentText)
+            is WithdrawSegment -> MayBeWithdrawal(word.segmentText)
+            // is CashuSegment -> CashuPreview(word.segmentText, accountViewModel)
+            is EmailSegment -> ClickableEmail(word.segmentText)
+            is PhoneSegment -> ClickablePhone(word.segmentText)
+            // is BechSegment -> BechLink(word.segmentText, true, backgroundColor, accountViewModel, nav)
+            is HashTagSegment -> HashTag(word, nav)
+            // is HashIndexUserSegment -> TagLink(word, accountViewModel, nav)
+            // is HashIndexEventSegment -> TagLink(word, true, backgroundColorState, accountViewModel, nav)
+            is SchemelessUrlSegment -> NoProtocolUrlRenderer(word)
+            is RegularTextSegment -> Text(word.segmentText)
        }
    }
 }
@@ -629,23 +697,25 @@ fun HashTag(
    val primary = MaterialTheme.colorScheme.primary
    val background = MaterialTheme.colorScheme.onBackground
    val hashtagIcon: HashtagIcon? =
-        remember(segment.hashtag) { checkForHashtagWithIcon(segment.hashtag, primary) }
+        remember(segment.segmentText) { checkForHashtagWithIcon(segment.hashtag, primary) }

    val regularText = remember { SpanStyle(color = background) }
    val clickableTextStyle = remember { SpanStyle(color = primary) }

    val annotatedTermsString =
-        remember {
+        remember(segment.segmentText) {
            buildAnnotatedString {
                withStyle(clickableTextStyle) {
                    pushStringAnnotation("routeToHashtag", "")
                    append("#${segment.hashtag}")
+                    pop()
                }

                if (hashtagIcon != null) {
                    withStyle(clickableTextStyle) {
                        pushStringAnnotation("routeToHashtag", "")
                        appendInlineContent("inlineContent", "[icon]")
+                        pop()
                    }
                }

@@ -696,7 +766,12 @@ fun TagLink(
        if (it == null) {
            Text(text = word.segmentText)
        } else {
-            Row { DisplayUserFromTag(it, word.extras, nav) }
+            Row {
+                DisplayUserFromTag(it, nav)
+                word.extras?.let {
+                    Text(text = it)
+                }
+            }
        }
    }
 }
@@ -773,7 +848,6 @@ private fun DisplayNoteFromTag(
@Composable
 private fun DisplayUserFromTag(
    baseUser: User,
-    addedChars: String?,
    nav: (String) -> Unit,
 ) {
    val route = remember { "User/${baseUser.pubkeyHex}" }
@@ -781,12 +855,11 @@ private fun DisplayUserFromTag(

    val meta by baseUser.live().userMetadataInfo.observeAsState(baseUser.info)

-    Crossfade(targetState = meta) {
+    Crossfade(targetState = meta, label = "DisplayUserFromTag") {
        Row {
            val displayName = remember(it) { it?.bestDisplayName() ?: it?.bestUsername() ?: hex }
            CreateClickableTextWithEmoji(
                clickablePart = displayName,
-                suffix = addedChars,
                maxLines = 1,
                route = route,
                nav = nav,
@@ -376,11 +376,13 @@ fun ImageUrlWithDownloadButton(
                withStyle(clickableTextStyle) {
                    pushStringAnnotation("routeToImage", "")
                    append("$url ")
+                    pop()
                }

                withStyle(clickableTextStyle) {
                    pushStringAnnotation("routeToImage", "")
                    appendInlineContent("inlineContent", "[icon]")
+                    pop()
                }

                withStyle(regularText) { append(" ") }
@@ -606,6 +608,7 @@ private fun DisplayUrlWithLoadingSymbolWait(content: BaseMediaContent) {
                    withStyle(clickableTextStyle) {
                        pushStringAnnotation("routeToImage", "")
                        append(content.url + " ")
+                        pop()
                    }
                } else {
                    withStyle(regularText) { append("Loading content...") }
@@ -614,6 +617,7 @@ private fun DisplayUrlWithLoadingSymbolWait(content: BaseMediaContent) {
                withStyle(clickableTextStyle) {
                    pushStringAnnotation("routeToImage", "")
                    appendInlineContent("inlineContent", "[icon]")
+                    pop()
                }

                withStyle(regularText) { append(" ") }
@@ -787,7 +787,6 @@ private fun DisplayMessageUsername(
    Spacer(modifier = StdHorzSpacer)
    CreateClickableTextWithEmoji(
        clickablePart = userDisplayName,
-        suffix = "",
        maxLines = 1,
        tags = userTags,
        fontWeight = FontWeight.Bold,
@@ -65,7 +65,6 @@ import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.model.Note
 import com.vitorpamplona.amethyst.model.NoteState
 import com.vitorpamplona.amethyst.model.User
-import com.vitorpamplona.amethyst.ui.components.ImageUrlType
 import com.vitorpamplona.amethyst.ui.components.InLineIconRenderer
 import com.vitorpamplona.amethyst.ui.components.RobohashFallbackAsyncImage
 import com.vitorpamplona.amethyst.ui.components.TranslatableRichTextViewer
@@ -90,10 +89,10 @@ import com.vitorpamplona.amethyst.ui.theme.bitcoinColor
 import com.vitorpamplona.amethyst.ui.theme.newItemBackgroundColor
 import com.vitorpamplona.amethyst.ui.theme.overPictureBackground
 import com.vitorpamplona.amethyst.ui.theme.profile35dpModifier
+import com.vitorpamplona.quartz.encoders.Nip30CustomEmoji
 import com.vitorpamplona.quartz.events.EmptyTagList
 import kotlinx.collections.immutable.ImmutableList
 import kotlinx.collections.immutable.persistentListOf
-import kotlinx.collections.immutable.toImmutableList
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 import kotlin.time.ExperimentalTime
@@ -232,10 +231,7 @@ fun RenderLikeGallery(
                    val url = noStartColon.substringAfter(":")

                    val renderable =
-                        listOf(
-                            ImageUrlType(url),
-                        )
-                            .toImmutableList()
+                        persistentListOf(Nip30CustomEmoji.ImageUrlType(url))

                    InLineIconRenderer(
                        renderable,
@@ -2930,7 +2930,6 @@ private fun LoadAndDisplayUser(
    if (userDisplayName != null) {
        CreateClickableTextWithEmoji(
            clickablePart = userDisplayName,
-            suffix = " ",
            maxLines = 1,
            route = route,
            nav = nav,
@@ -99,9 +99,7 @@ import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.model.Note
 import com.vitorpamplona.amethyst.service.ZapPaymentHandler
 import com.vitorpamplona.amethyst.ui.actions.NewPostView
-import com.vitorpamplona.amethyst.ui.components.ImageUrlType
 import com.vitorpamplona.amethyst.ui.components.InLineIconRenderer
-import com.vitorpamplona.amethyst.ui.components.TextType
 import com.vitorpamplona.amethyst.ui.navigation.routeToMessage
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.amethyst.ui.theme.ButtonBorder
@@ -128,6 +126,7 @@ import com.vitorpamplona.amethyst.ui.theme.TinyBorders
 import com.vitorpamplona.amethyst.ui.theme.mediumImportanceLink
 import com.vitorpamplona.amethyst.ui.theme.placeholderText
 import com.vitorpamplona.amethyst.ui.theme.placeholderTextColorFilter
+import com.vitorpamplona.quartz.encoders.Nip30CustomEmoji
 import kotlinx.collections.immutable.ImmutableList
 import kotlinx.collections.immutable.ImmutableSet
 import kotlinx.collections.immutable.persistentListOf
@@ -808,10 +807,9 @@ private fun RenderReactionType(
    if (reactionType.isNotEmpty() && reactionType[0] == ':') {
        val renderable =
            remember(reactionType) {
-                listOf(
-                    ImageUrlType(reactionType.removePrefix(":").substringAfter(":")),
+                persistentListOf(
+                    Nip30CustomEmoji.ImageUrlType(reactionType.removePrefix(":").substringAfter(":")),
                )
-                    .toImmutableList()
            }

        InLineIconRenderer(
@@ -1284,11 +1282,10 @@ private fun ActionableReactionButton(
            val url = noStartColon.substringAfter(":")

            val renderable =
-                listOf(
-                    ImageUrlType(url),
-                    TextType(removeSymbol),
+                persistentListOf(
+                    Nip30CustomEmoji.ImageUrlType(url),
+                    Nip30CustomEmoji.TextType(removeSymbol),
                )
-                    .toImmutableList()

            InLineIconRenderer(
                renderable,
@@ -80,17 +80,17 @@ import com.vitorpamplona.amethyst.model.AddressableNote
 import com.vitorpamplona.amethyst.service.firstFullChar
 import com.vitorpamplona.amethyst.ui.actions.CloseButton
 import com.vitorpamplona.amethyst.ui.actions.SaveButton
-import com.vitorpamplona.amethyst.ui.components.ImageUrlType
 import com.vitorpamplona.amethyst.ui.components.InLineIconRenderer
-import com.vitorpamplona.amethyst.ui.components.TextType
 import com.vitorpamplona.amethyst.ui.navigation.routeFor
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.amethyst.ui.theme.ButtonBorder
 import com.vitorpamplona.amethyst.ui.theme.placeholderText
 import com.vitorpamplona.quartz.encoders.ATag
+import com.vitorpamplona.quartz.encoders.Nip30CustomEmoji
 import com.vitorpamplona.quartz.events.EmojiPackSelectionEvent
 import com.vitorpamplona.quartz.events.EmojiUrl
 import kotlinx.collections.immutable.ImmutableList
+import kotlinx.collections.immutable.persistentListOf
 import kotlinx.collections.immutable.toImmutableList
 import kotlinx.coroutines.launch

@@ -283,11 +283,10 @@ private fun RenderReactionOption(
            val url = noStartColon.substringAfter(":")

            val renderable =
-                listOf(
-                    ImageUrlType(url),
-                    TextType(" ✖"),
+                persistentListOf(
+                    Nip30CustomEmoji.ImageUrlType(url),
+                    Nip30CustomEmoji.TextType(" ✖"),
                )
-                    .toImmutableList()

            InLineIconRenderer(
                renderable,
@@ -533,6 +533,7 @@ fun LoginPage(
                        withStyle(clickableTextStyle) {
                            pushStringAnnotation("openTerms", "")
                            append(stringResource(R.string.terms_of_use))
+                            pop()
                        }
                    }

@@ -197,6 +197,7 @@ fun SignUpPage(
                    withStyle(clickableTextStyle) {
                        pushStringAnnotation("openTerms", "")
                        append(stringResource(R.string.terms_of_use))
+                        pop()
                    }
                }

@@ -169,6 +169,7 @@ private fun TranslationMessage(
                withStyle(clickableTextStyle) {
                    pushStringAnnotation("langSettings", true.toString())
                    append(stringResource(R.string.translations_auto))
+                    pop()
                }

                append("-${stringResource(R.string.translations_translated_from)} ")
@@ -176,6 +177,7 @@ private fun TranslationMessage(
                withStyle(clickableTextStyle) {
                    pushStringAnnotation("showOriginal", true.toString())
                    append(Locale(source).displayName)
+                    pop()
                }

                append(" ${stringResource(R.string.translations_to)} ")
@@ -183,6 +185,7 @@ private fun TranslationMessage(
                withStyle(clickableTextStyle) {
                    pushStringAnnotation("showOriginal", false.toString())
                    append(Locale(target).displayName)
+                    pop()
                }
            }

@@ -1,78 +0,0 @@
-/**
- * Copyright (c) 2024 Vitor Pamplona
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy of
- * this software and associated documentation files (the "Software"), to deal in
- * the Software without restriction, including without limitation the rights to use,
- * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
- * Software, and to permit persons to whom the Software is furnished to do so,
- * subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
- * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-package com.vitorpamplona.amethyst.service
-
-import junit.framework.TestCase.assertEquals
-import org.junit.Test
-
-class Nip30Test {
-    @Test()
-    fun parseEmoji() {
-        val input = "Alex Gleason :soapbox:"
-
-        assertEquals(
-            listOf("Alex Gleason ", ":soapbox:", ""),
-            Nip30CustomEmoji().buildArray(input),
-        )
-    }
-
-    @Test()
-    fun parseEmojiInverted() {
-        val input = ":soapbox:Alex Gleason"
-
-        assertEquals(
-            listOf("", ":soapbox:", "Alex Gleason"),
-            Nip30CustomEmoji().buildArray(input),
-        )
-    }
-
-    @Test()
-    fun parseEmoji2() {
-        val input = "Hello :gleasonator: \uD83D\uDE02 :ablobcatrainbow: :disputed: yolo"
-
-        assertEquals(
-            listOf("Hello ", ":gleasonator:", " 😂 ", ":ablobcatrainbow:", " ", ":disputed:", " yolo"),
-            Nip30CustomEmoji().buildArray(input),
-        )
-
-        println(Nip30CustomEmoji().buildArray(input).joinToString(","))
-    }
-
-    @Test()
-    fun parseEmoji3() {
-        val input = "hello vitor: how can I help:"
-
-        assertEquals(
-            listOf("hello vitor: how can I help:"),
-            Nip30CustomEmoji().buildArray(input),
-        )
-    }
-
-    @Test()
-    fun parseJapanese() {
-        val input = "\uD883\uDEDE\uD883\uDEDE麺の:x30EDE:。:\uD883\uDEDE:(Violation of NIP-30)"
-
-        assertEquals(
-            listOf("\uD883\uDEDE\uD883\uDEDE麺の", ":x30EDE:", "。:\uD883\uDEDE:(Violation of NIP-30)"),
-            Nip30CustomEmoji().buildArray(input),
-        )
-    }
-}
@@ -22,6 +22,7 @@ package com.vitorpamplona.amethyst.commons

 import androidx.test.ext.junit.runners.AndroidJUnit4
 import com.vitorpamplona.quartz.events.EmptyTagList
+import com.vitorpamplona.quartz.events.ImmutableListOfLists
 import org.junit.Test
 import org.junit.runner.RunWith

@@ -4242,6 +4243,44 @@ class RichTextParserTest {
            }
    }

+    @Test
+    fun testJapaneseWithEmojis() {
+        val tags =
+            arrayOf(
+                arrayOf("t", "ioメシヨソイゲーム"),
+                arrayOf("emoji", "_ri", "https://media.misskeyusercontent.com/emoji/_ri.png"),
+                arrayOf("emoji", "petthex_japanesecake", "https://media.misskeyusercontent.com/emoji/petthex_japanesecake.gif"),
+                arrayOf("emoji", "ai_nomming", "https://media.misskeyusercontent.com/misskey/f6294900-f678-43cc-bc36-3ee5deeca4c2.gif"),
+                arrayOf("proxy", "https://misskey.io/notes/9q0x6gtdysir03qh", "activitypub"),
+            )
+        val text =
+            "\u200B:_ri:\u200B\u200B:_ri:\u200Bはﾍﾞｲｸﾄﾞﾓﾁｮﾁｮ\u200B:petthex_japanesecake:\u200Bを食べました\u200B:ai_nomming:\u200B\n" +
+                "#ioメシヨソイゲーム\n" +
+                "https://misskey.io/play/9g3qza4jow"
+
+        val state =
+            RichTextParser().parseText(text, ImmutableListOfLists(tags))
+
+        printStateForDebug(state)
+
+        val expectedResult =
+            listOf<String>(
+                "Emoji(\u200B:_ri:\u200B\u200B:_ri:\u200Bはﾍﾞｲｸﾄﾞﾓﾁｮﾁｮ\u200B:petthex_japanesecake:\u200Bを食べました\u200B:ai_nomming:\u200B)",
+                "HashTag(#ioメシヨソイゲーム)",
+                "Link(https://misskey.io/play/9g3qza4jow)",
+            )
+
+        state.paragraphs
+            .map { it.words }
+            .flatten()
+            .forEachIndexed { index, seg ->
+                org.junit.Assert.assertEquals(
+                    expectedResult[index],
+                    "${seg.javaClass.simpleName.replace("Segment", "")}(${seg.segmentText})",
+                )
+            }
+    }
+
    private fun printStateForDebug(state: com.vitorpamplona.amethyst.commons.RichTextViewerState) {
        state.paragraphs.forEach { paragraph ->
            paragraph.words.forEach { seg ->
@@ -24,6 +24,7 @@ import android.util.Log
 import android.util.Patterns
 import com.linkedin.urls.detection.UrlDetector
 import com.linkedin.urls.detection.UrlDetectorOptions
+import com.vitorpamplona.quartz.encoders.Nip30CustomEmoji
 import com.vitorpamplona.quartz.encoders.Nip54
 import com.vitorpamplona.quartz.encoders.Nip92
 import com.vitorpamplona.quartz.events.FileHeaderEvent
@@ -108,8 +109,7 @@ class RichTextParser() {
            urlSet.mapNotNull { fullUrl -> parseMediaUrl(fullUrl, tags) }.associateBy { it.url }
        val imageList = imagesForPager.values.toList()

-        val emojiMap =
-            tags.lists.filter { it.size > 2 && it[0] == "emoji" }.associate { ":${it[1]}:" to it[2] }
+        val emojiMap = Nip30CustomEmoji.createEmojiMap(tags)

        val segments = findTextSegments(content, imagesForPager.keys, urlSet, emojiMap, tags)

@@ -205,7 +205,7 @@ class RichTextParser() {

        if (urls.contains(word)) return LinkSegment(word)

-        if (word.startsWith(":") && emojis.any { word.contains(it.key) }) return EmojiSegment(word)
+        if (Nip30CustomEmoji.fastMightContainEmoji(word, emojis) && emojis.any { word.contains(it.key) }) return EmojiSegment(word)

        if (word.startsWith("lnbc", true)) return InvoiceSegment(word)

@@ -0,0 +1,113 @@
+/**
+ * Copyright (c) 2024 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.quartz.encoders
+
+import androidx.compose.runtime.Immutable
+import com.vitorpamplona.quartz.events.ImmutableListOfLists
+import kotlinx.collections.immutable.ImmutableList
+import kotlinx.collections.immutable.toImmutableList
+import java.util.regex.Pattern
+
+class Nip30CustomEmoji {
+    companion object {
+        val customEmojiPattern: Pattern =
+            Pattern.compile("\\:([A-Za-z0-9_\\-]+)\\:", Pattern.CASE_INSENSITIVE)
+
+        fun fastMightContainEmoji(
+            input: String,
+            allTags: ImmutableListOfLists<String>?,
+        ): Boolean {
+            if (allTags == null) return false
+            if (allTags.lists.any { it.size > 2 && it[0] == "emoji" }) return true
+            return input.contains(":")
+        }
+
+        fun fastMightContainEmoji(
+            input: String,
+            emojiPairs: Map<String, String>,
+        ): Boolean {
+            if (emojiPairs.isEmpty()) return false
+            return input.contains(":")
+        }
+
+        fun createEmojiMap(tags: ImmutableListOfLists<String>): Map<String, String> {
+            return tags.lists.filter { it.size > 2 && it[0] == "emoji" }.associate { ":${it[1]}:" to it[2] }
+        }
+
+        fun assembleAnnotatedList(
+            input: String,
+            allTags: ImmutableListOfLists<String>?,
+        ): ImmutableList<Renderable>? {
+            if (allTags == null || allTags.lists.isEmpty()) return null
+
+            val emojiPairs = createEmojiMap(allTags)
+
+            return assembleAnnotatedList(input, emojiPairs)
+        }
+
+        fun assembleAnnotatedList(
+            input: String,
+            emojiPairs: Map<String, String>,
+        ): ImmutableList<Renderable>? {
+            val matcher = customEmojiPattern.matcher(input)
+            val emojiNamesInOrder = mutableListOf<String>()
+            while (matcher.find()) {
+                emojiNamesInOrder.add(matcher.group())
+            }
+
+            if (emojiNamesInOrder.isEmpty()) {
+                return null
+            }
+
+            val regularCharsInOrder = input.split(customEmojiPattern.toRegex())
+
+            val finalList = mutableListOf<Renderable>()
+
+            // Merge the two lists in Order.
+            var index = 0
+            for (word in regularCharsInOrder) {
+                if (word.isNotEmpty()) {
+                    finalList.add(TextType(word))
+                }
+                if (index < emojiNamesInOrder.size) {
+                    val url = emojiPairs[emojiNamesInOrder[index]]
+
+                    if (url != null) {
+                        finalList.add(ImageUrlType(url))
+                    } else {
+                        if (word.isNotEmpty()) {
+                            finalList.add(TextType(word))
+                        }
+                    }
+                }
+                index++
+            }
+
+            return finalList.toImmutableList()
+        }
+    }
+
+    @Immutable open class Renderable()
+
+    @Immutable class TextType(val text: String) : Renderable()
+
+    @Immutable class ImageUrlType(val url: String) : Renderable()
+}
@@ -0,0 +1,168 @@
+/**
+ * Copyright (c) 2024 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.quartz.encoders
+
+import com.vitorpamplona.quartz.events.ImmutableListOfLists
+import junit.framework.TestCase.assertEquals
+import junit.framework.TestCase.assertNull
+import org.junit.Test
+
+class Nip30Test {
+    @Test()
+    fun parseEmoji() {
+        val tags = mapOf(":soapbox:" to "http://soapbox")
+        val input = "Alex Gleason :soapbox:"
+
+        val result = Nip30CustomEmoji.assembleAnnotatedList(input, tags)
+
+        assertEquals(2, result!!.size)
+
+        assertEquals(
+            "Alex Gleason ",
+            (result!![0] as Nip30CustomEmoji.TextType).text,
+        )
+
+        assertEquals(
+            "http://soapbox",
+            (result!![1] as Nip30CustomEmoji.ImageUrlType).url,
+        )
+    }
+
+    @Test()
+    fun parseEmojiInverted() {
+        val tags = mapOf(":soapbox:" to "http://soapbox")
+        val input = ":soapbox:Alex Gleason"
+
+        val result = Nip30CustomEmoji.assembleAnnotatedList(input, tags)
+
+        assertEquals(2, result!!.size)
+
+        assertEquals(
+            "http://soapbox",
+            (result!![0] as Nip30CustomEmoji.ImageUrlType).url,
+        )
+
+        assertEquals(
+            "Alex Gleason",
+            (result!![1] as Nip30CustomEmoji.TextType).text,
+        )
+    }
+
+    @Test()
+    fun parseEmoji2() {
+        val tags =
+            mapOf(
+                ":gleasonator:" to "http://gleasonator",
+                ":ablobcatrainbow:" to "http://ablobcatrainbow",
+                ":disputed:" to "http://disputed",
+            )
+        val input = "Hello :gleasonator: \uD83D\uDE02 :ablobcatrainbow: :disputed: yolo"
+
+        val result = Nip30CustomEmoji.assembleAnnotatedList(input, tags)
+
+        assertEquals(7, result!!.size)
+
+        assertEquals("Hello ", (result!![0] as Nip30CustomEmoji.TextType).text)
+
+        assertEquals("http://gleasonator", (result!![1] as Nip30CustomEmoji.ImageUrlType).url)
+
+        assertEquals(" 😂 ", (result!![2] as Nip30CustomEmoji.TextType).text)
+
+        assertEquals("http://ablobcatrainbow", (result!![3] as Nip30CustomEmoji.ImageUrlType).url)
+
+        assertEquals(" ", (result!![4] as Nip30CustomEmoji.TextType).text)
+
+        assertEquals("http://disputed", (result!![5] as Nip30CustomEmoji.ImageUrlType).url)
+
+        assertEquals(" yolo", (result!![6] as Nip30CustomEmoji.TextType).text)
+    }
+
+    @Test()
+    fun parseEmoji3() {
+        val tags = emptyMap<String, String>()
+        val input = "hello vitor: how can I help:"
+
+        val result = Nip30CustomEmoji.assembleAnnotatedList(input, tags)
+
+        assertNull(result)
+    }
+
+    @Test()
+    fun parseEmoji4() {
+        val tags = mapOf(":vitor:" to "http://vitor")
+        val input = "hello :vitor: how :can I help:"
+
+        val result = Nip30CustomEmoji.assembleAnnotatedList(input, tags)
+
+        assertEquals(3, result!!.size)
+
+        assertEquals("hello ", (result!![0] as Nip30CustomEmoji.TextType).text)
+
+        assertEquals("http://vitor", (result!![1] as Nip30CustomEmoji.ImageUrlType).url)
+
+        assertEquals(" how :can I help:", (result!![2] as Nip30CustomEmoji.TextType).text)
+    }
+
+    @Test()
+    fun parseJapanese() {
+        val tags = mapOf(":x30EDE:" to "http://x30EDE", ":\uD883\uDEDE:" to "http://\uD883\uDEDE")
+        val input = "\uD883\uDEDE\uD883\uDEDE麺の:x30EDE:。:\uD883\uDEDE:(Violation of NIP-30)"
+
+        val result = Nip30CustomEmoji.assembleAnnotatedList(input, tags)
+
+        assertEquals(3, result!!.size)
+
+        assertEquals("\uD883\uDEDE\uD883\uDEDE麺の", (result!![0] as Nip30CustomEmoji.TextType).text)
+        assertEquals("http://x30EDE", (result!![1] as Nip30CustomEmoji.ImageUrlType).url)
+        assertEquals("。:\uD883\uDEDE:(Violation of NIP-30)", (result!![2] as Nip30CustomEmoji.TextType).text)
+    }
+
+    @Test()
+    fun parseJapanese2() {
+        val tags =
+            arrayOf(
+                arrayOf("t", "ioメシヨソイゲーム"),
+                arrayOf("emoji", "_ri", "https://media.misskeyusercontent.com/emoji/_ri.png"),
+                arrayOf("emoji", "petthex_japanesecake", "https://media.misskeyusercontent.com/emoji/petthex_japanesecake.gif"),
+                arrayOf("emoji", "ai_nomming", "https://media.misskeyusercontent.com/misskey/f6294900-f678-43cc-bc36-3ee5deeca4c2.gif"),
+                arrayOf("proxy", "https://misskey.io/notes/9q0x6gtdysir03qh", "activitypub"),
+            )
+        val input =
+            "\u200B:_ri:\u200B\u200B:_ri:\u200Bはﾍﾞｲｸﾄﾞﾓﾁｮﾁｮ\u200B:petthex_japanesecake:\u200Bを食べました\u200B:ai_nomming:\u200B\n" +
+                "#ioメシヨソイゲーム\n" +
+                "https://misskey.io/play/9g3qza4jow"
+
+        val result = Nip30CustomEmoji.assembleAnnotatedList(input, ImmutableListOfLists(tags))
+
+        assertEquals(9, result!!.size)
+
+        var i = 0
+        assertEquals("\u200B", (result!![i++] as Nip30CustomEmoji.TextType).text)
+        assertEquals("https://media.misskeyusercontent.com/emoji/_ri.png", (result!![i++] as Nip30CustomEmoji.ImageUrlType).url)
+        assertEquals("\u200B\u200B", (result!![i++] as Nip30CustomEmoji.TextType).text)
+        assertEquals("https://media.misskeyusercontent.com/emoji/_ri.png", (result!![i++] as Nip30CustomEmoji.ImageUrlType).url)
+        assertEquals("\u200Bはﾍﾞｲｸﾄﾞﾓﾁｮﾁｮ\u200B", (result!![i++] as Nip30CustomEmoji.TextType).text)
+        assertEquals("https://media.misskeyusercontent.com/emoji/petthex_japanesecake.gif", (result!![i++] as Nip30CustomEmoji.ImageUrlType).url)
+        assertEquals("\u200Bを食べました\u200B", (result!![i++] as Nip30CustomEmoji.TextType).text)
+        assertEquals("https://media.misskeyusercontent.com/misskey/f6294900-f678-43cc-bc36-3ee5deeca4c2.gif", (result!![i++] as Nip30CustomEmoji.ImageUrlType).url)
+        assertEquals("\u200B\n#ioメシヨソイゲーム\nhttps://misskey.io/play/9g3qza4jow", (result!![i++] as Nip30CustomEmoji.TextType).text)
+    }
+}