Add Pull To Refresh for fetching task list

Signed-off-by: alperozturk <alper_ozturk@proton.me>

app/src/main/java/com/nextcloud/client/assistant/AssistantViewModel.kt

@@ -95,7 +95,7 @@ class AssistantViewModel(client: NextcloudClient) : ViewModel() {
         }
     }
 
-    private fun getTaskList(appId: String = "assistant") {
+    fun getTaskList(appId: String = "assistant", onCompleted: () -> Unit = {}) {
         viewModelScope.launch(Dispatchers.IO) {
             val result = repository.getTaskList(appId)
 
@@ -106,6 +106,8 @@ class AssistantViewModel(client: NextcloudClient) : ViewModel() {
             _loading.update {
                 false
             }
+
+            onCompleted()
         }
     }
 

app/src/main/java/com/nextcloud/client/assistant/AsssistantScreen.kt

@@ -23,19 +23,26 @@ package com.nextcloud.client.assistant
 
 import android.app.Activity
 import androidx.compose.foundation.ExperimentalFoundationApi
+import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.LinearProgressIndicator
+import androidx.compose.material3.pulltorefresh.rememberPullToRefreshState
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.input.nestedscroll.nestedScroll
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
@@ -48,13 +55,14 @@ import com.owncloud.android.R
 import com.owncloud.android.lib.resources.assistant.model.Task
 import com.owncloud.android.lib.resources.assistant.model.TaskType
 import com.owncloud.android.utils.DisplayUtils
+import kotlinx.coroutines.delay
 
+@OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun AssistantScreen(viewModel: AssistantViewModel, floatingActionButton: FloatingActionButton) {
     // TODO hide sort group, search bar
     // TODO top bar, back button causes crash
     // TODO generate list according to selection (selectedTask).
-    // TODO add swipe to refresh
     val activity = LocalContext.current as Activity
     val loading by viewModel.loading.collectAsState()
     val selectedTaskType by viewModel.selectedTaskType.collectAsState()
@@ -66,16 +74,35 @@ fun AssistantScreen(viewModel: AssistantViewModel, floatingActionButton: Floatin
         mutableStateOf(false)
     }
 
+    val pullRefreshState = rememberPullToRefreshState()
+
+    if (pullRefreshState.isRefreshing) {
+        LaunchedEffect(true) {
+            delay(1500)
+            viewModel.getTaskList(onCompleted = {
+                pullRefreshState.endRefresh()
+            })
+        }
+    }
+
     floatingActionButton.setOnClickListener {
         showAddTaskAlertDialog = true
     }
 
-    if (loading) {
-        CenterText(text = stringResource(id = R.string.assistant_screen_loading))
-    } else {
-        val tasks = taskList?.resultData?.tasks ?: return
-        val types = taskTypes?.resultData?.types ?: return
-        AssistantContent(tasks, types, selectedTaskType, viewModel)
+    Box(Modifier.nestedScroll(pullRefreshState.nestedScrollConnection)) {
+        if (loading || pullRefreshState.isRefreshing) {
+            CenterText(text = stringResource(id = R.string.assistant_screen_loading))
+        } else {
+            val tasks = taskList?.resultData?.tasks ?: return
+            val types = taskTypes?.resultData?.types ?: return
+            AssistantContent(tasks, types, selectedTaskType, viewModel)
+        }
+
+        if (pullRefreshState.isRefreshing) {
+            LinearProgressIndicator(modifier = Modifier.fillMaxWidth())
+        } else {
+            LinearProgressIndicator(progress = { pullRefreshState.progress }, modifier = Modifier.fillMaxWidth())
+        }
     }
 
     if (isTaskCreated) {