TodoSettingsFragment: Rewrite to Jetpack Compose (#368, #581)

* Add ViewModel for fragment

app/src/main/java/com/edricchan/studybuddy/ui/modules/settings/fragment/TodoSettingsFragment.kt

@@ -1,11 +1,39 @@
 package com.edricchan.studybuddy.ui.modules.settings.fragment
 
 import android.os.Bundle
-import com.edricchan.studybuddy.R
-import com.edricchan.studybuddy.ui.preference.MaterialPreferenceFragment
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import androidx.compose.foundation.layout.WindowInsets
+import androidx.compose.foundation.layout.navigationBars
+import androidx.compose.foundation.layout.windowInsetsPadding
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.input.nestedscroll.nestedScroll
+import androidx.compose.ui.platform.rememberNestedScrollInteropConnection
+import androidx.fragment.app.viewModels
+import androidx.fragment.compose.content
+import com.edricchan.studybuddy.features.settings.task.ui.TaskSettingsScreen
+import com.edricchan.studybuddy.features.settings.task.vm.TaskSettingsViewModel
+import com.edricchan.studybuddy.ui.common.fragment.BaseFragment
+import com.edricchan.studybuddy.ui.theming.compose.StudyBuddyTheme
+import dagger.hilt.android.AndroidEntryPoint
 
-class TodoSettingsFragment : MaterialPreferenceFragment() {
-    override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
-        setPreferencesFromResource(R.xml.pref_todos, rootKey)
+@AndroidEntryPoint
+class TodoSettingsFragment : BaseFragment() {
+    private val viewModel by viewModels<TaskSettingsViewModel>()
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ) = content {
+        val nestedScrollInterop = rememberNestedScrollInteropConnection()
+        StudyBuddyTheme {
+            TaskSettingsScreen(
+                modifier = Modifier
+                    .nestedScroll(nestedScrollInterop)
+                    .windowInsetsPadding(WindowInsets.navigationBars),
+                viewModel = viewModel
+            )
+        }
     }
 }

features/settings/src/main/kotlin/com/edricchan/studybuddy/features/settings/task/model/TaskSortOptionCompat.kt

@@ -0,0 +1,35 @@
+package com.edricchan.studybuddy.features.settings.task.model
+
+import androidx.annotation.StringRes
+import com.edricchan.studybuddy.features.settings.R
+import com.edricchan.studybuddy.features.settings.task.model.TaskSortOptionCompat.entries
+
+enum class TaskSortOptionCompat(
+    @StringRes val stringResource: Int,
+    val value: String
+) {
+    None(
+        stringResource = R.string.pref_task_default_sort_entry_none,
+        value = "none"
+    ),
+    TitleAsc(
+        stringResource = R.string.pref_task_default_sort_entry_title_asc,
+        value = "title_asc"
+    ),
+    TitleDesc(
+        stringResource = R.string.pref_task_default_sort_entry_title_desc,
+        value = "title_desc"
+    ),
+    DueDateNewToOld(
+        stringResource = R.string.pref_task_default_sort_entry_due_date_new_to_old,
+        value = "due_date_new_to_old"
+    ),
+    DueDateOldToNew(
+        stringResource = R.string.pref_task_default_sort_entry_due_date_old_to_new,
+        value = "due_date_old_to_new"
+    );
+
+    companion object {
+        fun fromValue(value: String): TaskSortOptionCompat = entries.first { it.value == value }
+    }
+}

features/settings/src/main/kotlin/com/edricchan/studybuddy/features/settings/task/ui/TaskSettings.kt

@@ -0,0 +1,83 @@
+package com.edricchan.studybuddy.features.settings.task.ui
+
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.Icon
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+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.res.painterResource
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.edricchan.studybuddy.features.settings.R
+import com.edricchan.studybuddy.features.settings.task.model.TaskSortOptionCompat
+import com.edricchan.studybuddy.features.settings.task.vm.TaskSettingsViewModel
+import com.edricchan.studybuddy.ui.preference.compose.ListDialogPreference
+import com.edricchan.studybuddy.ui.theming.compose.StudyBuddyTheme
+
+@Composable
+private fun TaskDefaultSortPreference(
+    modifier: Modifier = Modifier,
+    defaultSort: TaskSortOptionCompat,
+    onDefaultSortChange: (TaskSortOptionCompat) -> Unit
+) {
+    ListDialogPreference(
+        modifier = modifier,
+        icon = { Icon(painterResource(R.drawable.ic_sort_24dp), contentDescription = null) },
+        title = { Text(text = stringResource(R.string.pref_task_default_sort_title)) },
+        subtitle = { Text(text = stringResource(defaultSort.stringResource)) },
+        values = TaskSortOptionCompat.entries,
+        value = defaultSort,
+        onValueChanged = onDefaultSortChange,
+        valueLabel = { Text(text = stringResource(it.stringResource)) }
+    )
+}
+
+@Composable
+fun TaskSettingsScreen(
+    modifier: Modifier = Modifier,
+    defaultSort: TaskSortOptionCompat,
+    onDefaultSortChange: (TaskSortOptionCompat) -> Unit
+) = Column(
+    modifier = modifier.verticalScroll(rememberScrollState())
+) {
+    TaskDefaultSortPreference(
+        defaultSort = defaultSort,
+        onDefaultSortChange = onDefaultSortChange
+    )
+}
+
+@Composable
+fun TaskSettingsScreen(
+    modifier: Modifier = Modifier,
+    viewModel: TaskSettingsViewModel
+) {
+    val defaultSort by viewModel.prefDefaultSort.asFlow().collectAsStateWithLifecycle(
+        TaskSortOptionCompat.None
+    )
+
+    TaskSettingsScreen(
+        modifier = modifier,
+        defaultSort = defaultSort,
+        onDefaultSortChange = viewModel.prefDefaultSort::set
+    )
+}
+
+@Preview
+@Composable
+private fun TaskSettingsScreenPreview() {
+    var defaultSort by remember { mutableStateOf(TaskSortOptionCompat.None) }
+
+    StudyBuddyTheme {
+        TaskSettingsScreen(
+            defaultSort = defaultSort,
+            onDefaultSortChange = { defaultSort = it }
+        )
+    }
+}

features/settings/src/main/kotlin/com/edricchan/studybuddy/features/settings/task/vm/TaskSettingsViewModel.kt

@@ -0,0 +1,29 @@
+package com.edricchan.studybuddy.features.settings.task.vm
+
+import android.content.Context
+import androidx.lifecycle.ViewModel
+import com.edricchan.studybuddy.core.settings.tasks.keyPrefTaskDefaultSort
+import com.edricchan.studybuddy.exts.androidx.preference.defaultSharedPreferences
+import com.edricchan.studybuddy.features.settings.task.model.TaskSortOptionCompat
+import com.fredporciuncula.flow.preferences.FlowSharedPreferences
+import com.fredporciuncula.flow.preferences.Preference
+import com.fredporciuncula.flow.preferences.map
+import dagger.hilt.android.lifecycle.HiltViewModel
+import dagger.hilt.android.qualifiers.ApplicationContext
+import javax.inject.Inject
+
+@HiltViewModel
+class TaskSettingsViewModel @Inject constructor(
+    @ApplicationContext context: Context
+) : ViewModel() {
+    private val appPreferences = FlowSharedPreferences(
+        context.defaultSharedPreferences
+    )
+
+    val prefDefaultSort: Preference<TaskSortOptionCompat> = appPreferences.getString(
+        keyPrefTaskDefaultSort
+    ).map(
+        mapper = TaskSortOptionCompat::fromValue,
+        reverse = TaskSortOptionCompat::value
+    )
+}

features/settings/src/main/res/values/task_strings.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- TODO: Add a better UI for the default sort -->
+    <eat-comment />
+
+    <!-- Title for the default sort mode setting. -->
+    <string name="pref_task_default_sort_title">Default sorting mode</string>
+
+    <string name="pref_task_default_sort_entry_none">None (Default)</string>
+    <string name="pref_task_default_sort_entry_title_asc">Title (A to Z)</string>
+    <string name="pref_task_default_sort_entry_title_desc">Title (Z to A)</string>
+    <string name="pref_task_default_sort_entry_due_date_new_to_old">Due Date (Newest to Oldest)</string>
+    <string name="pref_task_default_sort_entry_due_date_old_to_new">Due Date (Oldest to Newest)</string>
+</resources>