#63 Add getFriendshipCount and add to profile screen

app/src/main/java/be/ugent/sel/studeez/common/composable/ButtonComposable.kt

@@ -31,7 +31,11 @@ import be.ugent.sel.studeez.common.ext.defaultButtonShape
 import be.ugent.sel.studeez.R.string as AppText
 
 @Composable
-fun BasicTextButton(@StringRes text: Int, modifier: Modifier, action: () -> Unit) {
+fun BasicTextButton(
+    @StringRes text: Int,
+    modifier: Modifier,
+    action: () -> Unit
+) {
     TextButton(
         onClick = action,
         modifier = modifier

app/src/main/java/be/ugent/sel/studeez/domain/implementation/FirebaseFriendshipDAO.kt

@@ -1,5 +1,6 @@
 package be.ugent.sel.studeez.domain.implementation
 
+import be.ugent.sel.studeez.common.snackbar.SnackbarManager
 import be.ugent.sel.studeez.data.local.models.Friendship
 import be.ugent.sel.studeez.domain.AccountDAO
 import be.ugent.sel.studeez.domain.FriendshipDAO
@@ -7,8 +8,14 @@ import com.google.firebase.firestore.DocumentReference
 import com.google.firebase.firestore.FirebaseFirestore
 import com.google.firebase.firestore.ktx.snapshots
 import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.catch
+import kotlinx.coroutines.flow.flow
 import kotlinx.coroutines.flow.map
 import javax.inject.Inject
+import kotlin.coroutines.resume
+import kotlin.coroutines.resumeWithException
+import kotlin.coroutines.suspendCoroutine
+import be.ugent.sel.studeez.R.string as AppText
 
 class FirebaseFriendshipDAO @Inject constructor(
     private val firestore: FirebaseFirestore,
@@ -27,7 +34,22 @@ class FirebaseFriendshipDAO @Inject constructor(
     }
 
     override fun getFriendshipCount(): Flow<Int> {
-        TODO("Not yet implemented")
+        return flow {
+            val friendshipCount = suspendCoroutine { continuation ->
+                currentUserDocument()
+                    .collection(FirebaseCollections.FRIENDS_COLLECTION)
+                    .get()
+                    .addOnSuccessListener { querySnapshot ->
+                        continuation.resume(querySnapshot.size())
+                    }
+                    .addOnFailureListener { exception ->
+                        continuation.resumeWithException(exception)
+                    }
+            }
+            emit(friendshipCount)
+        }.catch {
+            SnackbarManager.showMessage(AppText.generic_error)
+        }
     }
 
     override fun getFriendshipDetails(id: String): Friendship {

app/src/main/java/be/ugent/sel/studeez/navigation/StudeezDestinations.kt

@@ -30,6 +30,7 @@ object StudeezDestinations {
     const val EDIT_TASK_FORM = "edit_task"
 
     // Friends flow
+    const val FRIENDS_OVERVIEW_SCREEN = "friends_overview"
     const val SEARCH_FRIENDS_SCREEN = "search_friends"
 
     // Create & edit screens

app/src/main/java/be/ugent/sel/studeez/navigation/StudeezNavGraph.kt

@@ -220,6 +220,10 @@ fun StudeezNavGraph(
         }
 
         // Friends flow
+        composable(StudeezDestinations.FRIENDS_OVERVIEW_SCREEN) {
+            // TODO
+        }
+
         composable(StudeezDestinations.SEARCH_FRIENDS_SCREEN) {
             // TODO
         }

app/src/main/java/be/ugent/sel/studeez/screens/profile/ProfileScreen.kt

@@ -1,30 +1,38 @@
 package be.ugent.sel.studeez.screens.profile
 
-import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.*
-import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.material.Button
 import androidx.compose.material.Icon
 import androidx.compose.material.IconButton
 import androidx.compose.material.Text
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Edit
 import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
+import be.ugent.sel.studeez.R
 import be.ugent.sel.studeez.common.composable.Headline
 import be.ugent.sel.studeez.common.composable.PrimaryScreenTemplate
 import be.ugent.sel.studeez.common.composable.drawer.DrawerActions
 import be.ugent.sel.studeez.common.composable.navbar.NavigationBarActions
+import be.ugent.sel.studeez.common.ext.defaultButtonShape
 import be.ugent.sel.studeez.resources
+import be.ugent.sel.studeez.ui.theme.StudeezTheme
 import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.emptyFlow
 import be.ugent.sel.studeez.R.string as AppText
 
 data class ProfileActions(
     val getUsername: suspend CoroutineScope.() -> String?,
     val getBiography: suspend CoroutineScope.() -> String?,
-    val onEditProfileClick: () -> Unit
+    val getAmountOfFriends: () -> Flow<Int>,
+    val onEditProfileClick: () -> Unit,
+    val onViewFriendsClick: () -> Unit
 )
 
 fun getProfileActions(
@@ -34,7 +42,9 @@ fun getProfileActions(
     return ProfileActions(
         getUsername = { viewModel.getUsername() },
         getBiography = { viewModel.getBiography() },
-        onEditProfileClick = { viewModel.onEditProfileClick(open) }
+        getAmountOfFriends = { viewModel.getAmountOfFriends() },
+        onEditProfileClick = { viewModel.onEditProfileClick(open) },
+        onViewFriendsClick = { viewModel.onViewFriendsClick(open) }
     )
 }
 
@@ -60,6 +70,8 @@ fun ProfileScreen(
 ) {
     var username: String? by remember { mutableStateOf("") }
     var biography: String? by remember { mutableStateOf("") }
+    val amountOfFriends = profileActions.getAmountOfFriends().collectAsState(initial = 0)
+
     LaunchedEffect(key1 = Unit) {
         username = profileActions.getUsername(this)
         biography = profileActions.getBiography(this)
@@ -76,6 +88,21 @@ fun ProfileScreen(
             item {
                 Headline(text = username ?: resources().getString(AppText.no_username))
             }
+
+            item {
+                Row(
+                    horizontalArrangement = Arrangement.spacedBy(5.dp),
+                    modifier = Modifier.fillMaxWidth()
+                        .wrapContentWidth(align = Alignment.CenterHorizontally)
+                ) {
+                    AmountOfFriendsButton(
+                        amountOfFriends = amountOfFriends.value
+                    ) {
+                        profileActions.onViewFriendsClick()
+                    }
+                }
+            }
+
             item {
                 Text(
                     text = biography ?: "",
@@ -96,7 +123,6 @@ fun EditAction(
             imageVector = Icons.Default.Edit,
             contentDescription = resources().getString(AppText.edit_profile)
         )
-
     }
 }
 
@@ -104,8 +130,38 @@ fun EditAction(
 @Composable
 fun ProfileScreenPreview() {
     ProfileScreen(
-        profileActions = ProfileActions({ null }, { null }, {}),
+        profileActions = ProfileActions({ null }, { null }, { emptyFlow() }, {}, {}),
         drawerActions = DrawerActions({}, {}, {}, {}, {}),
         navigationBarActions = NavigationBarActions({ false }, {}, {}, {}, {}, {}, {}, {})
     )
+}
+
+@Composable
+fun AmountOfFriendsButton(
+    amountOfFriends: Int,
+    onClick: () -> Unit
+){
+    Button(
+        onClick = onClick,
+        shape = defaultButtonShape()
+    ) {
+        Text(
+            text = resources().getQuantityString(
+                /* id = */ R.plurals.friends_amount,
+                /* quantity = */ amountOfFriends,
+                /* ...formatArgs = */ amountOfFriends
+            )
+        )
+    }
+}
+
+@Preview
+@Composable
+fun AmountOfFriendsButtonPreview() {
+    StudeezTheme {
+        Column {
+            AmountOfFriendsButton(amountOfFriends = 1) { }
+            AmountOfFriendsButton(amountOfFriends = 100) { }
+        }
+    }
 }

app/src/main/java/be/ugent/sel/studeez/screens/profile/ProfileViewModel.kt

@@ -1,15 +1,18 @@
 package be.ugent.sel.studeez.screens.profile
 
+import be.ugent.sel.studeez.domain.FriendshipDAO
 import be.ugent.sel.studeez.domain.LogService
 import be.ugent.sel.studeez.domain.UserDAO
 import be.ugent.sel.studeez.navigation.StudeezDestinations
 import be.ugent.sel.studeez.screens.StudeezViewModel
 import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.Flow
 import javax.inject.Inject
 
 @HiltViewModel
 class ProfileViewModel @Inject constructor(
     private val userDAO: UserDAO,
+    private val friendshipDAO: FriendshipDAO,
     logService: LogService
 ) : StudeezViewModel(logService) {
 
@@ -21,8 +24,16 @@ class ProfileViewModel @Inject constructor(
         return userDAO.getLoggedInUser().biography
     }
 
+    fun getAmountOfFriends(): Flow<Int> {
+        return friendshipDAO.getFriendshipCount()
+    }
+
     fun onEditProfileClick(open: (String) -> Unit) {
         open(StudeezDestinations.EDIT_PROFILE_SCREEN)
     }
 
+    fun onViewFriendsClick(open: (String) -> Unit) {
+        open(StudeezDestinations.FRIENDS_OVERVIEW_SCREEN)
+    }
+
 }

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

@@ -20,7 +20,7 @@
     <!-- Messages -->
     <string name="success">Success!</string>
     <string name="try_again">Try again</string>
-    <string name="generic_error">Something wrong happened. Please try again.</string>
+    <string name="generic_error">Something went wrong. Please try again.</string>
     <string name="email_error">Please insert a valid email.</string>
 
     <!-- ========== NavBar ========== -->
@@ -107,6 +107,10 @@
 
     <string name="friends">Friends</string>
     <string name="friend">Friend</string>
+    <plurals name="friends_amount">
+        <item quantity="one">%d Friend</item>
+        <item quantity="other">%d Friends</item>
+    </plurals>
     <string name="add_friend_not_possible_yet">Adding friends still needs to be implemented. Hang on tight!</string> <!-- TODO Remove this description line once implemented. -->
 
     <!-- ========== Create & edit screens ========== -->