Show list members on caldav list settings screen

app/src/main/java/org/tasks/caldav/BaseCaldavCalendarSettingsActivity.kt

@@ -46,8 +46,9 @@ abstract class BaseCaldavCalendarSettingsActivity : BaseListSettingsActivity() {
     @BindView(R.id.progress_bar)
     lateinit var progressView: ProgressBar
 
-    private var caldavCalendar: CaldavCalendar? = null
-    private lateinit var caldavAccount: CaldavAccount
+    protected var caldavCalendar: CaldavCalendar? = null
+
+    protected lateinit var caldavAccount: CaldavAccount
 
     override val layout: Int
         get() = R.layout.activity_caldav_calendar_settings

app/src/main/java/org/tasks/caldav/CaldavCalendarSettingsActivity.kt

@@ -2,21 +2,38 @@ package org.tasks.caldav
 
 import android.os.Bundle
 import androidx.activity.viewModels
-import androidx.lifecycle.lifecycleScope
+import androidx.compose.foundation.layout.*
+import androidx.compose.material.Icon
+import androidx.compose.material.MaterialTheme
+import androidx.compose.material.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.ComposeView
+import androidx.compose.ui.res.colorResource
+import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import androidx.core.view.isVisible
 import dagger.hilt.android.AndroidEntryPoint
-import kotlinx.coroutines.launch
 import org.tasks.R
 import org.tasks.data.CaldavAccount
 import org.tasks.data.CaldavCalendar
+import org.tasks.data.Principal
+import org.tasks.data.Principal.Companion.name
+import org.tasks.data.PrincipalDao
+import javax.inject.Inject
 
 @AndroidEntryPoint
 class CaldavCalendarSettingsActivity : BaseCaldavCalendarSettingsActivity() {
+
+    @Inject lateinit var principalDao: PrincipalDao
+
     private val createCalendarViewModel: CreateCalendarViewModel by viewModels()
     private val deleteCalendarViewModel: DeleteCalendarViewModel by viewModels()
     private val updateCalendarViewModel: UpdateCalendarViewModel by viewModels()
 
-    override val layout: Int
-        get() = R.layout.activity_caldav_calendar_settings
+    override val layout = R.layout.activity_caldav_calendar_settings
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -27,6 +44,54 @@ class CaldavCalendarSettingsActivity : BaseCaldavCalendarSettingsActivity() {
                 this,
                 { updateCalendar() },
                 this::requestFailed)
+
+        caldavCalendar?.takeIf { it.id > 0 }?.let {
+            principalDao.getPrincipals(it.id).observe(this) {
+                findViewById<ComposeView>(R.id.people)
+                    .apply { isVisible = it.isNotEmpty() }
+                    .setContent { PrincipalList(it) }
+            }
+        }
+    }
+
+    @Composable
+    private fun PrincipalList(principals: List<Principal>) {
+        tasksTheme.TasksTheme {
+            Column(
+                modifier = Modifier
+                    .padding(16.dp)
+                    .fillMaxWidth()
+            ) {
+                Text(
+                    stringResource(R.string.list_members),
+                    style = MaterialTheme.typography.h6,
+                    color = MaterialTheme.colors.onBackground
+                )
+                Spacer(Modifier.height(8.dp))
+                principals.forEach {
+                    PrincipalRow(it)
+                }
+            }
+        }
+    }
+
+    @Composable
+    fun PrincipalRow(principal: Principal) {
+        Row(modifier = Modifier
+            .padding(PaddingValues(0.dp, 16.dp))
+            .fillMaxWidth()) {
+            Icon(
+                painter = painterResource(R.drawable.ic_outline_perm_identity_24px),
+                contentDescription = null,
+                modifier = Modifier.padding(end = 16.dp),
+                tint = colorResource(R.color.icon_tint_with_alpha)
+            )
+            Text(
+                principal.name!!,
+                style = MaterialTheme.typography.body1,
+                color = MaterialTheme.colors.onBackground,
+            )
+        }
     }
 
     override suspend fun createCalendar(caldavAccount: CaldavAccount, name: String, color: Int) =
@@ -38,4 +103,13 @@ class CaldavCalendarSettingsActivity : BaseCaldavCalendarSettingsActivity() {
 
     override suspend fun deleteCalendar(caldavAccount: CaldavAccount, caldavCalendar: CaldavCalendar) =
             deleteCalendarViewModel.deleteCalendar(caldavAccount, caldavCalendar)
+
+    @Preview
+    @Composable
+    private fun PreviewList() {
+        PrincipalList(listOf(
+            Principal().apply { displayName = "user1" },
+            Principal().apply { displayName = "user2" },
+        ))
+    }
 }

app/src/main/java/org/tasks/data/Principal.kt

@@ -62,4 +62,15 @@ class Principal {
     override fun toString(): String {
         return "Principal(id=$id, list=$list, principal=$principal, displayName=$displayName, inviteStatus=$inviteStatus, access=$access)"
     }
+
+    companion object {
+        private val MAILTO = "^mailto:".toRegex()
+        private val LAST_SEGMENT = ".*/([^/]+).*".toRegex()
+
+        val Principal.name: String?
+            get() = displayName
+                ?: principal
+                    ?.replace(MAILTO, "")
+                    ?.replaceFirst(LAST_SEGMENT, "$1")
+    }
 }

app/src/main/java/org/tasks/data/PrincipalDao.kt

@@ -1,5 +1,6 @@
 package org.tasks.data
 
+import androidx.lifecycle.LiveData
 import androidx.room.*
 
 @Dao
@@ -19,4 +20,7 @@ WHERE principal_list = :list
 
     @Query("SELECT * FROM principals")
     fun getAll(): List<Principal>
+
+    @Query("SELECT * FROM principals WHERE principal_list = :id")
+    fun getPrincipals(id: Long): LiveData<List<Principal>>
 }

app/src/main/java/org/tasks/themes/Theme.kt

@@ -4,15 +4,49 @@ import android.app.Activity
 import android.content.Context
 import android.graphics.PixelFormat
 import android.view.LayoutInflater
+import androidx.compose.material.MaterialTheme
+import androidx.compose.material.darkColors
+import androidx.compose.material.lightColors
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.graphics.Color
+import dagger.hilt.android.qualifiers.ActivityContext
 import org.tasks.R
 import javax.inject.Inject
 
 class Theme @Inject constructor(
+    @ActivityContext val context: Context,
     val themeBase: ThemeBase,
     val themeColor: ThemeColor,
     private val themeAccent: ThemeAccent
 ) {
-    fun withThemeColor(themeColor: ThemeColor) = Theme(themeBase, themeColor, themeAccent)
+    private val darkTheme = themeBase.isDarkTheme(context as Activity)
+
+    @Composable
+    fun TasksTheme(
+        content: @Composable () -> Unit,
+    ) {
+        val primary = Color(themeColor.primaryColor)
+        val onPrimary = Color(themeColor.colorOnPrimary)
+        val secondary = Color(themeAccent.accentColor)
+        MaterialTheme(
+            colors = if (darkTheme) {
+                darkColors(
+                    primary = primary,
+                    onPrimary = onPrimary,
+                    secondary = secondary,
+                )
+            } else {
+                lightColors(
+                    primary = primary,
+                    onPrimary = onPrimary,
+                    secondary = secondary,
+                )
+            },
+            content = content
+        )
+    }
+
+    fun withThemeColor(themeColor: ThemeColor) = Theme(context, themeBase, themeColor, themeAccent)
 
     fun getLayoutInflater(context: Context) =
         wrap(context).getSystemService(Context.LAYOUT_INFLATER_SERVICE) as LayoutInflater

app/src/main/res/layout/activity_caldav_calendar_settings.xml

@@ -36,6 +36,11 @@
 
       <include layout="@layout/list_settings_icon"/>
 
+      <androidx.compose.ui.platform.ComposeView
+          android:id="@+id/people"
+          android:layout_width="match_parent"
+          android:layout_height="wrap_content"/>
+
     </LinearLayout>
 
   </ScrollView>

app/src/main/res/values/strings.xml

@@ -688,4 +688,5 @@ File %1$s contained %2$s.\n\n
   <string name="tasks_org_account_required">Tasks.org account required</string>
   <string name="account_not_included">Not included with \'Name your price\' subscriptions</string>
   <string name="map_theme_use_app_theme">Use app theme</string>
+  <string name="list_members">List members</string>
 </resources>

app/src/test/java/org/tasks/data/PrincipalTest.kt

@@ -0,0 +1,34 @@
+package org.tasks.data
+
+import org.junit.Assert.assertEquals
+import org.junit.Test
+import org.tasks.data.Principal.Companion.name
+
+class PrincipalTest {
+    @Test
+    fun lastSegmentTrailingSlash() {
+        val principal = Principal().apply {
+            principal = "principals/users/user1/"
+        }
+
+        assertEquals("user1", principal.name)
+    }
+
+    @Test
+    fun lastSegmentNoTrailingSlash() {
+        val principal = Principal().apply {
+            principal = "principals/users/user1"
+        }
+
+        assertEquals("user1", principal.name)
+    }
+
+    @Test
+    fun stripMailto() {
+        val principal = Principal().apply {
+            principal = "mailto:user@example.com"
+        }
+
+        assertEquals("user@example.com", principal.name)
+    }
+}