feat(scoreboard-repository): Implement repository-model implementatio…

…n for scoreboard-models handling

api/src/main/java/io/github/aivruu/packetboard/board/BoardRepositoryModel.java

@@ -0,0 +1,74 @@
+// This file is part of packet-board, licensed under the GNU License.
+//
+// Copyright (c) 2024 aivruu
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+package io.github.aivruu.packetboard.board;
+
+import io.github.aivruu.packetboard.repository.RepositoryModel;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Collection;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * {@link RepositoryModel} implementation used for {@link CachedBoardModel}'s.
+ *
+ * @since 1.0.0
+ */
+public class BoardRepositoryModel implements RepositoryModel<CachedBoardModel> {
+  private final Map<String, CachedBoardModel> scoreboards = new ConcurrentHashMap<>();
+
+  @Override
+  public @Nullable CachedBoardModel findSync(final String id) {
+    return this.scoreboards.get(id);
+  }
+
+  @Override
+  public Collection<CachedBoardModel> findAllSync() {
+    return List.copyOf(this.scoreboards.values());
+  }
+
+  @Override
+  public void saveSync(final CachedBoardModel model) {
+    this.scoreboards.put(model.id(), model);
+  }
+
+  @Override
+  public void updateSync(final CachedBoardModel model) {
+    final var id = model.id();
+    // No matter if the model exists or not, we will replace it of either way.
+    this.scoreboards.remove(id);
+    this.scoreboards.put(id, model);
+  }
+
+  @Override
+  public boolean deleteSync(final String id) {
+    final var cachedBoardModel = this.scoreboards.remove(id);
+    // Check if the player has never joined the server, or the scoreboard is turned-off.
+    if ((cachedBoardModel == null) || !cachedBoardModel.visible()) {
+      return false;
+    }
+    // Once the scoreboard is deleted, the status-provider must return the 'DELETED' status as
+    // confirmation.
+    return cachedBoardModel.delete().deleted();
+  }
+
+  @Override
+  public void clearRegistry() {
+    this.scoreboards.clear();
+  }
+}