Moves all hashtags to lowercase and unfollows with ignore case just in case some other client added in uppercase

amethyst/src/main/java/com/vitorpamplona/amethyst/model/nip51Lists/hashtagLists/HashtagListState.kt

@@ -89,9 +89,9 @@ class HashtagListState(
         val hashtagList = getHashtagList()
 
         return if (hashtagList == null) {
-            HashtagListEvent.create(hashtag, true, signer)
+            HashtagListEvent.create(hashtag.lowercase(), true, signer)
         } else {
-            HashtagListEvent.add(hashtagList, hashtag, true, signer)
+            HashtagListEvent.add(hashtagList, hashtag.lowercase(), true, signer)
         }
     }
 

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/MainActivity.kt

@@ -141,7 +141,7 @@ fun uriToRoute(
         return Route.Notification
     }
     if (isHashtagRoute(uri)) {
-        return Route.Hashtag(uri.removePrefix("nostr:").removePrefix("hashtag?id="))
+        return Route.Hashtag(uri.removePrefix("nostr:").removePrefix("hashtag?id=").lowercase())
     }
 
     val nip19 = Nip19Parser.uriToRoute(uri)?.entity

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/components/RichTextViewer.kt

@@ -692,7 +692,7 @@ fun HashTag(
         modifier =
             remember {
                 Modifier.clickable {
-                    nav.nav(Route.Hashtag(segment.hashtag))
+                    nav.nav(Route.Hashtag(segment.hashtag.lowercase()))
                 }
             },
         inlineContent =

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/elements/DisplayHashtags.kt

@@ -86,6 +86,6 @@ private fun DisplayTagList(
         overflow = TextOverflow.Ellipsis,
         maxLines = 1,
     ) {
-        nav.nav(Route.Hashtag(firstTag))
+        nav.nav(Route.Hashtag(firstTag.lowercase()))
     }
 }

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/elements/DisplayUncitedHashtags.kt

@@ -96,7 +96,7 @@ fun DisplayUncitedHashtags(
             unusedHashtags.forEach { hashtag ->
                 ClickableTextColor(
                     text = "#$hashtag ",
-                    onClick = { nav.nav(Route.Hashtag(hashtag)) },
+                    onClick = { nav.nav(Route.Hashtag(hashtag.lowercase())) },
                     linkColor = MaterialTheme.colorScheme.lessImportantLink,
                 )
             }

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/nip22Comments/DisplayHashtagExternalId.kt

@@ -55,7 +55,7 @@ fun DisplayHashtagExternalId(
     nav: INav,
 ) {
     DisplayHashtagExternalId(externalId.topic) {
-        nav.nav(Route.Hashtag(externalId.topic))
+        nav.nav(Route.Hashtag(externalId.topic.lowercase()))
     }
 }
 

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/profile/hashtags/TabFollowedTags.kt

@@ -57,7 +57,7 @@ fun TabFollowedTags(
                 HashtagHeader(
                     tag = hashtag,
                     account = accountViewModel,
-                    onClick = { nav.nav(Route.Hashtag(hashtag)) },
+                    onClick = { nav.nav(Route.Hashtag(hashtag.lowercase())) },
                 )
                 HorizontalDivider(
                     thickness = DividerThickness,

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/search/SearchScreen.kt

@@ -257,7 +257,7 @@ private fun DisplaySearchResults(
             hashTags,
             key = { _, item -> "#$item" },
         ) { _, item ->
-            HashtagLine(item) { nav.nav(Route.Hashtag(item)) }
+            HashtagLine(item.lowercase()) { nav.nav(Route.Hashtag(item.lowercase())) }
 
             HorizontalDivider(
                 modifier = Modifier.padding(top = 10.dp),

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip51Lists/TagArrayExt.kt

@@ -24,6 +24,7 @@ import com.vitorpamplona.quartz.nip01Core.core.Tag
 import com.vitorpamplona.quartz.nip01Core.core.TagArray
 import com.vitorpamplona.quartz.utils.startsWith
 import com.vitorpamplona.quartz.utils.startsWithAny
+import com.vitorpamplona.quartz.utils.startsWithIgnoreCase
 
 inline fun TagArray.filterToArray(predicate: (Array<String>) -> Boolean): TagArray = filterTo(ArrayList(), predicate).toTypedArray()
 
@@ -31,6 +32,8 @@ inline fun TagArray.remove(predicate: (Array<String>) -> Boolean): TagArray = fi
 
 fun TagArray.remove(startsWith: Array<String>): TagArray = filterNotTo(ArrayList(this.size), { it.startsWith(startsWith) }).toTypedArray()
 
+fun TagArray.removeIgnoreCase(startsWith: Array<String>): TagArray = filterNotTo(ArrayList(this.size), { it.startsWithIgnoreCase(startsWith) }).toTypedArray()
+
 fun <R> TagArray.removeParsing(
     transform: (Tag) -> R,
     equalsTo: R,

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip51Lists/hashtagList/HashtagListEvent.kt

@@ -36,8 +36,8 @@ import com.vitorpamplona.quartz.nip31Alts.alt
 import com.vitorpamplona.quartz.nip51Lists.PrivateTagArrayEvent
 import com.vitorpamplona.quartz.nip51Lists.encryption.PrivateTagsInContent
 import com.vitorpamplona.quartz.nip51Lists.encryption.signNip51List
-import com.vitorpamplona.quartz.nip51Lists.remove
 import com.vitorpamplona.quartz.nip51Lists.removeAny
+import com.vitorpamplona.quartz.nip51Lists.removeIgnoreCase
 import com.vitorpamplona.quartz.utils.TimeUtils
 
 @Immutable
@@ -140,8 +140,8 @@ class HashtagListEvent(
         ): HashtagListEvent {
             val privateTags = earlierVersion.privateTags(signer) ?: throw SignerExceptions.UnauthorizedDecryptionException()
             return resign(
-                privateTags = privateTags.remove(HashtagTag.assemble(hashtag)),
+                privateTags = privateTags.removeIgnoreCase(HashtagTag.assemble(hashtag)),
-                tags = earlierVersion.tags.remove(HashtagTag.assemble(hashtag)),
+                tags = earlierVersion.tags.removeIgnoreCase(HashtagTag.assemble(hashtag)),
                 signer = signer,
                 createdAt = createdAt,
             )

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/utils/ArrayUtils.kt

@@ -40,6 +40,14 @@ fun Array<String>.startsWith(startsWith: Array<String>): Boolean {
     return true
 }
 
+fun Array<String>.startsWithIgnoreCase(startsWith: Array<String>): Boolean {
+    if (startsWith.size > this.size) return false
+    for (tagIdx in startsWith.indices) {
+        if (!startsWith[tagIdx].equals(this[tagIdx], ignoreCase = true)) return false
+    }
+    return true
+}
+
 fun Array<String>.startsWithAny(startsWithList: List<Array<String>>): Boolean = startsWithList.any { startsWith(it) }
 
 public inline fun <T, R> Array<out T>.lastNotNullOfOrNull(transform: (T) -> R?): R? {