Starts to use getXIfExists functions to preload objects

app/src/main/java/com/vitorpamplona/amethyst/model/LocalCache.kt

@@ -51,6 +51,18 @@ object LocalCache {
         }
     }
 
+    fun getUserIfExists(key: String): User? {
+        return users[key]
+    }
+
+    fun getNoteIfExists(key: String): Note? {
+        return addressables[key] ?: notes[key]
+    }
+
+    fun getChannelIfExists(key: String): Channel? {
+        return channels[key]
+    }
+
     fun checkGetOrCreateNote(key: String): Note? {
         checkNotInMainThread()
 

app/src/main/java/com/vitorpamplona/amethyst/ui/components/ClickableRoute.kt

@@ -90,7 +90,7 @@ private fun LoadNote(
     hex: String,
     content: @Composable (Note) -> Unit
 ) {
-    var noteBase by remember(hex) { mutableStateOf<Note?>(null) }
+    var noteBase by remember(hex) { mutableStateOf(LocalCache.getNoteIfExists(hex)) }
 
     LaunchedEffect(key1 = hex) {
         if (noteBase == null) {
@@ -184,13 +184,15 @@ private fun DisplayAddress(
     nip19: Nip19.Return,
     nav: (String) -> Unit
 ) {
-    var noteBase by remember(nip19) { mutableStateOf<Note?>(null) }
+    var noteBase by remember(nip19) { mutableStateOf(LocalCache.getNoteIfExists(nip19.hex)) }
 
     LaunchedEffect(key1 = nip19.hex) {
+        if (noteBase == null) {
             launch(Dispatchers.IO) {
                 noteBase = LocalCache.checkGetOrCreateAddressableNote(nip19.hex)
             }
         }
+    }
 
     noteBase?.let {
         val noteState by it.live().metadata.observeAsState()
@@ -221,13 +223,15 @@ private fun DisplayUser(
     nip19: Nip19.Return,
     nav: (String) -> Unit
 ) {
-    var userBase by remember(nip19) { mutableStateOf<User?>(null) }
+    var userBase by remember(nip19) { mutableStateOf(LocalCache.getUserIfExists(nip19.hex)) }
 
     LaunchedEffect(key1 = nip19.hex) {
+        if (userBase == null) {
             launch(Dispatchers.IO) {
                 userBase = LocalCache.checkGetOrCreateUser(nip19.hex)
             }
         }
+    }
 
     userBase?.let {
         RenderUserAsClickableText(it, nip19, nav)

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

@@ -548,7 +548,7 @@ private fun ObserveNIP19Event(
     it: Nip19.Return,
     onRefresh: () -> Unit
 ) {
-    var baseNote by remember(it) { mutableStateOf<Note?>(null) }
+    var baseNote by remember(it) { mutableStateOf<Note?>(LocalCache.getNoteIfExists(it.hex)) }
 
     LaunchedEffect(key1 = it.hex) {
         if (baseNote == null) {
@@ -563,6 +563,12 @@ private fun ObserveNIP19Event(
     }
 
     baseNote?.let { note ->
+        ObserveNote(note, onRefresh)
+    }
+}
+
+@Composable
+fun ObserveNote(note: Note, onRefresh: () -> Unit) {
     val noteState by note.live().metadata.observeAsState()
 
     LaunchedEffect(key1 = noteState) {
@@ -573,14 +579,13 @@ private fun ObserveNIP19Event(
         }
     }
 }
-}
 
 @Composable
 private fun ObserveNIP19User(
     it: Nip19.Return,
     onRefresh: () -> Unit
 ) {
-    var baseUser by remember(it) { mutableStateOf<User?>(null) }
+    var baseUser by remember(it) { mutableStateOf<User?>(LocalCache.getUserIfExists(it.hex)) }
 
     LaunchedEffect(key1 = it.hex) {
         if (baseUser == null) {
@@ -595,6 +600,12 @@ private fun ObserveNIP19User(
     }
 
     baseUser?.let { user ->
+        ObserveUser(user, onRefresh)
+    }
+}
+
+@Composable
+private fun ObserveUser(user: User, onRefresh: () -> Unit) {
     val userState by user.live().metadata.observeAsState()
 
     LaunchedEffect(key1 = userState) {
@@ -605,7 +616,6 @@ private fun ObserveNIP19User(
         }
     }
 }
-}
 
 private fun getDisplayNameAndNIP19FromTag(tag: String, tags: ImmutableListOfLists<String>): Pair<String, String>? {
     val matcher = tagIndex.matcher(tag)

app/src/main/java/com/vitorpamplona/amethyst/ui/note/ChatroomCompose.kt

@@ -225,7 +225,7 @@ private fun WatchNotificationChanges(
 @Composable
 fun LoadUser(baseUserHex: String, content: @Composable (User) -> Unit) {
     var user by remember(baseUserHex) {
-        mutableStateOf<User?>(null)
+        mutableStateOf<User?>(LocalCache.getUserIfExists(baseUserHex))
     }
 
     LaunchedEffect(key1 = baseUserHex) {

app/src/main/java/com/vitorpamplona/amethyst/ui/note/NoteCompose.kt

@@ -1850,7 +1850,7 @@ private fun DrawAuthorImages(baseNote: Note, accountViewModel: AccountViewModel,
 @Composable
 fun LoadChannel(baseChannelHex: String, content: @Composable (Channel) -> Unit) {
     var channel by remember(baseChannelHex) {
-        mutableStateOf<Channel?>(null)
+        mutableStateOf<Channel?>(LocalCache.getChannelIfExists(baseChannelHex))
     }
 
     LaunchedEffect(key1 = baseChannelHex) {