feat: check for internet connection before sending API requests

app/src/main/java/ru/risdeveau/pixeldragon/repo/Room.kt

@@ -8,6 +8,7 @@ package ru.risdeveau.pixeldragon.repo
 import ru.risdeveau.pixeldragon.api.getJoinedRooms
 import ru.risdeveau.pixeldragon.api.getRoom
 import ru.risdeveau.pixeldragon.db.cacheDb
+import ru.risdeveau.pixeldragon.db.isConnected
 import ru.risdeveau.pixeldragon.db.isExpired
 import ru.risdeveau.pixeldragon.db.toDomain
 import ru.risdeveau.pixeldragon.db.toEntity
@@ -27,7 +28,9 @@ class Room (
     companion object {
         suspend fun getById(id: String, cached: Boolean = true): Room {
             val cachedRoom = cacheDb.roomDoa().getById(id)
-            if ((cachedRoom == null) or (cachedRoom?.isExpired() == true)) {
+            if (!isConnected() and
+                (!cached or (cachedRoom == null) or (cachedRoom?.isExpired() == true))
+            ) {
                 val room = getRoom(id)
                 val cacheRoom = room.toEntity()
                 cacheDb.roomDoa().insert(cacheRoom)
@@ -38,7 +41,7 @@ class Room (
 
         suspend fun getJoined(cached: Boolean = true): List<Room> {
             val cacheJoined = cacheDb.roomDoa().getAllJoined()
-            if (cacheJoined.isEmpty()) {
+            if (!isConnected() and cacheJoined.isEmpty()) {
                 return getJoinedRooms()
             }
             return List(cacheJoined.size) { i -> cacheJoined[i].toDomain() }