1 files changed, 57 insertions, 0 deletions
diff --git a/src/engine/systems/Level.ts b/src/engine/systems/Level.ts
new file mode 100644
index 0000000..87e12a5
--- /dev/null
+++ b/src/engine/systems/Level.ts
@@ -0,0 +1,57 @@
+import { SystemNames, System } from ".";
+import { Game } from "..";
+import { type Level as LevelType, LEVELS, LEVEL_PROGRESSION } from "../levels";
+
+export class Level extends System {
+  private unlockedLevels: Set<string>;
+  private currentLevel: LevelType | null;
+  private moveToLevel: string | null;
+  private levelMap: Map<string, LevelType>;
+
+  constructor(initialLevel: string) {
+    super(SystemNames.Level);
+
+    this.levelMap = new Map();
+    LEVELS.forEach((level) => {
+      this.levelMap.set(level.name, level);
+    });
+
+    this.currentLevel = null;
+    this.moveToLevel = initialLevel;
+    this.unlockedLevels = new Set();
+  }
+
+  public setLevel(level: string) {
+    this.moveToLevel = level;
+  }
+
+  public update(_dt: number, game: Game) {
+    if (this.moveToLevel === this.currentLevel?.name || !this.moveToLevel) {
+      return;
+    }
+
+    if (this.currentLevel) {
+      game.resetState();
+    }
+
+    const unlockedLevels = LEVEL_PROGRESSION[this.moveToLevel];
+    if (unlockedLevels && unlockedLevels.length > 0) {
+      unlockedLevels.forEach((levelName) => {
+        if (!this.unlockedLevels.has(levelName)) {
+          this.unlockedLevels.add(levelName);
+        }
+      });
+    }
+
+    if (!this.unlockedLevels.has(this.moveToLevel)) {
+      this.unlockedLevels.add(this.moveToLevel);
+    }
+    this.currentLevel = this.levelMap.get(this.moveToLevel)!;
+    this.currentLevel.init(game);
+    this.moveToLevel = null;
+  }
+
+  public getUnlockedLevels() {
+    return this.unlockedLevels;
+  }
+}