Add getAllFriendships()

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

@@ -0,0 +1,49 @@
+package be.ugent.sel.studeez.domain.implementation
+
+import be.ugent.sel.studeez.data.local.models.Friendship
+import be.ugent.sel.studeez.domain.AccountDAO
+import be.ugent.sel.studeez.domain.FriendshipDAO
+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.map
+import javax.inject.Inject
+
+class FirebaseFriendshipDAO @Inject constructor(
+    private val firestore: FirebaseFirestore,
+    private val auth: AccountDAO
+): FriendshipDAO {
+
+    private fun currentUserDocument(): DocumentReference = firestore
+        .collection(FirebaseCollections.USER_COLLECTION)
+        .document(auth.currentUserId)
+
+    override fun getAllFriendships(): Flow<List<Friendship>> {
+        return currentUserDocument()
+            .collection(FirebaseCollections.FRIENDS_COLLECTION)
+            .snapshots()
+            .map { it.toObjects(Friendship::class.java) }
+    }
+
+    override fun getFriendshipCount(): Flow<Int> {
+        TODO("Not yet implemented")
+    }
+
+    override fun getFriendshipDetails(id: String): Friendship {
+        TODO("Not yet implemented")
+    }
+
+    override fun sendFriendshipRequest(id: String): Boolean {
+        TODO("Not yet implemented")
+    }
+
+    override fun acceptFriendship(id: String): Boolean {
+        TODO("Not yet implemented")
+    }
+
+    override fun removeFriendship(id: String): Boolean {
+        TODO("Not yet implemented")
+    }
+
+}