Add setting to protect a user profile with a PIN (#356)

Allows for setting a per-user profile PIN that must be entered to switch
to the user. The PIN is a sequence of directional buttons, ie D-Pad
left/right/up/down.

This PIN is per device per user per server. The PIN is stored locally
and not sent nor shared with the server. If you forget your PIN, can
still access the app using server credentials which also removes the
PIN.

Additionally, there is another setting to disable automatically sign in.
When enabled (default) the last user is automatically restored, even if
there is a PIN. If disabled, a server & user must always be selected
when opening the app.

Closes #268
Closes #321

app/src/main/java/com/github/damontecres/wholphin/data/AppDatabase.kt

@@ -23,7 +23,7 @@ import java.util.UUID
 
 @Database(
     entities = [JellyfinServer::class, JellyfinUser::class, ItemPlayback::class, NavDrawerPinnedItem::class, LibraryDisplayInfo::class],
-    version = 9,
+    version = 10,
     exportSchema = true,
     autoMigrations = [
         AutoMigration(3, 4),
@@ -32,6 +32,7 @@ import java.util.UUID
         AutoMigration(6, 7),
         AutoMigration(7, 8),
         AutoMigration(8, 9),
+        AutoMigration(9, 10),
     ],
 )
 @TypeConverters(Converters::class)

app/src/main/java/com/github/damontecres/wholphin/data/JellyfinServerDao.kt

@@ -27,7 +27,7 @@ interface JellyfinServerDao {
         }
     }
 
-    @Insert(onConflict = OnConflictStrategy.Companion.IGNORE)
+    @Insert(onConflict = OnConflictStrategy.IGNORE)
     fun addUser(user: JellyfinUser): Long
 
     @Update

app/src/main/java/com/github/damontecres/wholphin/data/ServerRepository.kt

@@ -132,6 +132,10 @@ class ServerRepository
             return false
         }
 
+        fun closeSession() {
+            _current.value = null
+        }
+
         /**
          * Given a successful [AuthenticationResult], switch to the user that just authenticated
          */
@@ -225,6 +229,21 @@ class ServerRepository
             }
         }
 
+        suspend fun setUserPin(
+            user: JellyfinUser,
+            pin: String?,
+        ) = withContext(Dispatchers.IO) {
+            val newUser = user.copy(pin = pin)
+            val updatedUser = serverDao.addOrUpdateUser(newUser)
+            if (currentUser.value?.id == updatedUser.id && currentServer.value?.id == user.serverId) {
+                // Updating current user, so push out the change
+                current.value?.let {
+                    val newCurrent = it.copy(user = updatedUser)
+                    _current.setValueOnMain(newCurrent)
+                }
+            }
+        }
+
         companion object {
             fun getServerSharedPreferences(context: Context): SharedPreferences =
                 context.getSharedPreferences(

app/src/main/java/com/github/damontecres/wholphin/data/model/JellyfinServer.kt

@@ -50,9 +50,10 @@ data class JellyfinUser(
     @ColumnInfo(index = true)
     val serverId: UUID,
     val accessToken: String?,
+    val pin: String? = null,
 ) {
     override fun toString(): String =
-        "JellyfinUser(rowId=$rowId, id=$id, name=$name, serverId=$serverId, accessToken=${accessToken.isNotNullOrBlank()})"
+        "JellyfinUser(rowId=$rowId, id=$id, name=$name, serverId=$serverId, accessToken?=${accessToken.isNotNullOrBlank()}, pin?=${pin.isNotNullOrBlank()})"
 }
 
 data class JellyfinServerUsers(