Prepare to support anonymous multireddit.

app/src/main/java/ml/docilealligator/infinityforreddit/RedditDataRoomDatabase.java

@@ -14,6 +14,8 @@ import ml.docilealligator.infinityforreddit.account.Account;
 import ml.docilealligator.infinityforreddit.account.AccountDao;
 import ml.docilealligator.infinityforreddit.customtheme.CustomTheme;
 import ml.docilealligator.infinityforreddit.customtheme.CustomThemeDao;
+import ml.docilealligator.infinityforreddit.multireddit.AnonymousMultiredditSubreddit;
+import ml.docilealligator.infinityforreddit.multireddit.AnonymousMultiredditSubredditDao;
 import ml.docilealligator.infinityforreddit.multireddit.MultiReddit;
 import ml.docilealligator.infinityforreddit.multireddit.MultiRedditDao;
 import ml.docilealligator.infinityforreddit.postfilter.PostFilter;
@@ -35,7 +37,7 @@ import ml.docilealligator.infinityforreddit.user.UserData;
 
 @Database(entities = {Account.class, SubredditData.class, SubscribedSubredditData.class, UserData.class,
         SubscribedUserData.class, MultiReddit.class, CustomTheme.class, RecentSearchQuery.class,
-        ReadPost.class, PostFilter.class, PostFilterUsage.class}, version = 20)
+        ReadPost.class, PostFilter.class, PostFilterUsage.class, AnonymousMultiredditSubreddit.class}, version = 21)
 public abstract class RedditDataRoomDatabase extends RoomDatabase {
     private static RedditDataRoomDatabase INSTANCE;
 
@@ -49,7 +51,7 @@ public abstract class RedditDataRoomDatabase extends RoomDatabase {
                                     MIGRATION_5_6, MIGRATION_6_7, MIGRATION_7_8, MIGRATION_8_9,
                                     MIGRATION_9_10, MIGRATION_10_11, MIGRATION_11_12, MIGRATION_12_13,
                                     MIGRATION_13_14, MIGRATION_14_15, MIGRATION_15_16, MIGRATION_16_17,
-                                    MIGRATION_17_18, MIGRATION_18_19, MIGRATION_19_20)
+                                    MIGRATION_17_18, MIGRATION_18_19, MIGRATION_19_20, MIGRATION_20_21)
                             .build();
                 }
             }
@@ -79,6 +81,8 @@ public abstract class RedditDataRoomDatabase extends RoomDatabase {
 
     public abstract PostFilterUsageDao postFilterUsageDao();
 
+    public abstract AnonymousMultiredditSubredditDao anonymousMultiredditSubredditDao();
+
     private static final Migration MIGRATION_1_2 = new Migration(1, 2) {
         @Override
         public void migrate(SupportSQLiteDatabase database) {
@@ -339,4 +343,13 @@ public abstract class RedditDataRoomDatabase extends RoomDatabase {
             database.execSQL("ALTER TABLE post_filter ADD COLUMN exclude_domains TEXT");
         }
     };
+
+    private static final Migration MIGRATION_20_21 = new Migration(20, 21) {
+        @Override
+        public void migrate(@NonNull SupportSQLiteDatabase database) {
+            database.execSQL("CREATE TABLE anonymous_multireddit_subreddits (path TEXT NOT NULL, username TEXT NOT NULL, subreddit_name TEXT NOT NULL, " +
+                    "PRIMARY KEY(path, username, subreddit_name), FOREIGN KEY(path) REFERENCES multi_reddits(path) ON DELETE CASCADE ON UPDATE CASCADE, " +
+                    "FOREIGN KEY(username) REFERENCES multi_reddits(username) ON DELETE CASCADE ON UPDATE CASCADE)");
+        }
+    };
 }

app/src/main/java/ml/docilealligator/infinityforreddit/multireddit/AnonymousMultiredditSubreddit.java

@@ -0,0 +1,53 @@
+package ml.docilealligator.infinityforreddit.multireddit;
+
+import androidx.annotation.NonNull;
+import androidx.room.ColumnInfo;
+import androidx.room.Entity;
+import androidx.room.ForeignKey;
+
+@Entity(tableName = "anonymous_multireddit_subreddits", primaryKeys = {"path", "username", "subreddit_name"},
+        foreignKeys = @ForeignKey(entity = MultiReddit.class, parentColumns = {"path", "username"},
+                childColumns = {"path", "username"}, onDelete = ForeignKey.CASCADE, onUpdate = ForeignKey.CASCADE))
+public class AnonymousMultiredditSubreddit {
+    @NonNull
+    @ColumnInfo(name = "path")
+    private String path;
+    @NonNull
+    @ColumnInfo(name = "username")
+    private String username = "-";
+    @NonNull
+    @ColumnInfo(name = "subreddit_name")
+    private String subredditName;
+
+    public AnonymousMultiredditSubreddit(@NonNull String path, @NonNull String subredditName) {
+        this.path = path;
+        this.subredditName = subredditName;
+    }
+
+    @NonNull
+    public String getPath() {
+        return path;
+    }
+
+    public void setPath(@NonNull String path) {
+        this.path = path;
+    }
+
+    @NonNull
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(@NonNull String username) {
+        this.username = username;
+    }
+
+    @NonNull
+    public String getSubredditName() {
+        return subredditName;
+    }
+
+    public void setSubredditName(@NonNull String subredditName) {
+        this.subredditName = subredditName;
+    }
+}

app/src/main/java/ml/docilealligator/infinityforreddit/multireddit/AnonymousMultiredditSubredditDao.java

@@ -0,0 +1,18 @@
+package ml.docilealligator.infinityforreddit.multireddit;
+
+import androidx.lifecycle.LiveData;
+import androidx.room.Dao;
+import androidx.room.Insert;
+import androidx.room.OnConflictStrategy;
+import androidx.room.Query;
+
+import java.util.List;
+
+@Dao
+public interface AnonymousMultiredditSubredditDao {
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    void insert(AnonymousMultiredditSubreddit anonymousMultiredditSubreddit);
+
+    @Query("SELECT * FROM anonymous_multireddit_subreddits WHERE path = :path ORDER BY subreddit_name COLLATE NOCASE ASC")
+    LiveData<List<AnonymousMultiredditSubreddit>> getAllAnonymousMultiRedditSubreddits(String path);
+}