Moves Preview and NIP05 verification to IO Threads

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

@@ -11,6 +11,8 @@ import androidx.compose.runtime.setValue
 import com.baha.url.preview.IUrlPreviewCallback
 import com.baha.url.preview.UrlInfoItem
 import com.vitorpamplona.amethyst.model.UrlCachedPreviewer
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
 
 
 @Composable
@@ -19,6 +21,7 @@ fun UrlPreview(url: String, urlText: String, showUrlIfError: Boolean = true) {
 
   // Doesn't use a viewModel because of viewModel reusing issues (too many UrlPreview are created).
   LaunchedEffect(url) {
+    withContext(Dispatchers.IO) {
       UrlCachedPreviewer.previewInfo(url, object : IUrlPreviewCallback {
         override fun onComplete(urlInfo: UrlInfoItem) {
           if (urlInfo.allFetchComplete() && urlInfo.url == url)
@@ -32,6 +35,7 @@ fun UrlPreview(url: String, urlText: String, showUrlIfError: Boolean = true) {
         }
       })
     }
+  }
 
   Crossfade(targetState = urlPreviewState, animationSpec = tween(durationMillis = 100)) { state ->
     when (state) {

app/src/main/java/com/vitorpamplona/amethyst/ui/note/NIP05VerificationDisplay.kt

@@ -33,12 +33,15 @@ import com.vitorpamplona.amethyst.model.User
 import com.vitorpamplona.amethyst.model.UserMetadata
 import com.vitorpamplona.amethyst.ui.theme.Nip05
 import java.util.Date
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
 
 @Composable
 fun nip05VerificationAsAState(user: UserMetadata, pubkeyHex: String): State<Boolean?> {
   var nip05Verified = remember { mutableStateOf<Boolean?>(null) }
 
   LaunchedEffect(key1 = user) {
+    withContext(Dispatchers.IO) {
       user.nip05?.ifBlank { null }?.let { nip05 ->
         val now = Date().time / 1000
         if ((user.nip05LastVerificationTime ?: 0) > (now - 60 * 60)) { // 1hour
@@ -67,6 +70,7 @@ fun nip05VerificationAsAState(user: UserMetadata, pubkeyHex: String): State<Bool
         }
       }
     }
+  }
 
   return nip05Verified
 }