feat: implement title autofill based on URL (#707)

unit/createpost/src/commonMain/kotlin/com/github/diegoberaldin/raccoonforlemmy/unit/createpost/CreatePostMviModel.kt

@@ -58,6 +58,7 @@ interface CreatePostMviModel :
         data class ChangeBodyValue(val value: TextFieldValue) : Intent
         data object Send : Intent
         data object SaveDraft : Intent
+        data object AutoFillTitle : Intent
     }
 
     data class UiState(
@@ -91,5 +92,6 @@ interface CreatePostMviModel :
         data object Success : Effect
         data class Failure(val message: String?) : Effect
         data object DraftSaved : Effect
+        data object AutoFillFailed : Effect
     }
 }

unit/createpost/src/commonMain/kotlin/com/github/diegoberaldin/raccoonforlemmy/unit/createpost/CreatePostScreen.kt

@@ -1,6 +1,7 @@
 package com.github.diegoberaldin.raccoonforlemmy.unit.createpost
 
 import androidx.compose.foundation.Image
+import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
@@ -11,6 +12,7 @@ import androidx.compose.foundation.layout.imePadding
 import androidx.compose.foundation.layout.navigationBarsPadding
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.foundation.text.KeyboardActions
 import androidx.compose.foundation.text.KeyboardOptions
 import androidx.compose.foundation.verticalScroll
@@ -51,6 +53,7 @@ import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.ColorFilter
 import androidx.compose.ui.platform.LocalFocusManager
 import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.input.ImeAction
 import androidx.compose.ui.text.input.KeyboardCapitalization
 import androidx.compose.ui.text.input.KeyboardType
@@ -61,6 +64,7 @@ import androidx.compose.ui.unit.dp
 import cafe.adriel.voyager.core.screen.Screen
 import cafe.adriel.voyager.koin.getScreenModel
 import com.github.diegoberaldin.raccoonforlemmy.core.appearance.di.getThemeRepository
+import com.github.diegoberaldin.raccoonforlemmy.core.appearance.theme.CornerSize
 import com.github.diegoberaldin.raccoonforlemmy.core.appearance.theme.Spacing
 import com.github.diegoberaldin.raccoonforlemmy.core.appearance.theme.toTypography
 import com.github.diegoberaldin.raccoonforlemmy.core.commonui.components.ProgressHud
@@ -205,11 +209,14 @@ class CreatePostScreen(
                     }
 
                     CreatePostMviModel.Effect.DraftSaved -> navigationCoordinator.popScreen()
+
+                    CreatePostMviModel.Effect.AutoFillFailed -> {
+                        snackbarHostState.showSnackbar(genericError)
+                    }
                 }
             }.launchIn(this)
         }
-        LaunchedEffect(notificationCenter)
+        LaunchedEffect(notificationCenter) {
-        {
             notificationCenter.subscribe(NotificationCenterEvent.SelectCommunity::class)
                 .onEach { evt ->
                     model.reduce(CreatePostMviModel.Intent.SetCommunity(evt.model))
@@ -356,6 +363,29 @@ class CreatePostScreen(
                     textStyle = typography.titleMedium,
                     value = uiState.title,
                     singleLine = true,
+                    trailingIcon = {
+                        if (uiState.url.isNotBlank()) {
+                            Text(
+                                modifier = Modifier
+                                    .padding(horizontal = Spacing.s)
+                                    .background(
+                                        color = MaterialTheme.colorScheme.primary,
+                                        shape = RoundedCornerShape(CornerSize.m),
+                                    )
+                                    .padding(Spacing.xs)
+                                    .onClick(
+                                        onClick = rememberCallback {
+                                            model.reduce(CreatePostMviModel.Intent.AutoFillTitle)
+                                        },
+                                    ),
+                                text = "auto".uppercase(),
+                                style = MaterialTheme.typography.labelSmall,
+                                fontFamily = FontFamily.Default,
+                                fontWeight = FontWeight.SemiBold,
+                                color = MaterialTheme.colorScheme.onPrimary,
+                            )
+                        }
+                    },
                     keyboardOptions = KeyboardOptions(
                         keyboardType = KeyboardType.Ascii,
                         autoCorrect = true,

unit/createpost/src/commonMain/kotlin/com/github/diegoberaldin/raccoonforlemmy/unit/createpost/CreatePostViewModel.kt

@@ -136,6 +136,7 @@ class CreatePostViewModel(
             CreatePostMviModel.Intent.Send -> submit()
 
             CreatePostMviModel.Intent.SaveDraft -> saveDraft()
+            CreatePostMviModel.Intent.AutoFillTitle -> autofillTitle()
         }
     }
 
@@ -338,4 +339,19 @@ class CreatePostViewModel(
             notificationCenter.send(NotificationCenterEvent.DraftDeleted)
         }
     }
+
+    private fun autofillTitle() {
+        val url = uiState.value.url.takeUnless { it.isBlank() } ?: return
+        screenModelScope.launch {
+            updateState { it.copy(loading = true) }
+            val metadata = siteRepository.getMetadata(url)
+            val suggestedTitle = metadata?.title.takeUnless { it.isNullOrBlank() }
+            updateState { it.copy(loading = false) }
+            if (suggestedTitle == null) {
+                emitEffect(CreatePostMviModel.Effect.AutoFillFailed)
+            } else {
+                updateState { it.copy(title = suggestedTitle) }
+            }
+        }
+    }
 }