feature: create default multiplayer world

packages/webcave-server/.env.example

@@ -19,3 +19,5 @@ WORLD_FILE_NAME=main_instance.world
 
 # Used for CORS policy
 CLIENT_ORIGIN_URL=
+
+USE_FALLBACK_DEFAULT_WORLD=true

packages/webcave-server/src/app.ts

@@ -22,14 +22,21 @@ function initWorld() {
   if (world.loadFromFile()) {
     logger.info( "Loaded the world from file." );
   } else {
-    logger.info( "Creating a new empty world." );
+    if (Config.USE_FALLBACK_DEFAULT_WORLD) {
+      logger.info( "Creating a new world from a template of default world." );
 
-    const defaultWorldSeed = "acid-info";
-    const magnitude = 0.1;
+      world.loadFromFile(world.getDefaultWorldFilePath())
+    } else {
+      logger.info( "Creating a new empty world." );
+
+      const defaultWorldSeed = "acid-info";
+      const magnitude = 0.1;
+
+      world.createRandomisedWorld(
+        Config.WORLD_GROUNDHEIGHT, defaultWorldSeed, undefined, magnitude
+      );
+    }
 
-    world.createRandomisedWorld(
-      Config.WORLD_GROUNDHEIGHT, defaultWorldSeed, undefined, magnitude
-    );
     world.prepareNewSaveDir()
     world.saveToFile();
   }

packages/webcave-server/src/config/index.ts

@@ -15,7 +15,8 @@ const {
   ONE_USER_PER_IP,
   IS_BEHIND_PROXY,
   WORLD_FILE_NAME,
-  CLIENT_ORIGIN_URL
+  CLIENT_ORIGIN_URL,
+  USE_FALLBACK_DEFAULT_WORLD
 } = process.env;
 
 if (!PORT) {
@@ -54,7 +55,8 @@ const Config: AppConfig = {
   CORS_POLICY: {  credentials: true,
     origin: CLIENT_ORIGIN_URL,
     methods: 'GET,HEAD,PUT,PATCH,POST,DELETE'
-  }
+  },
+  USE_FALLBACK_DEFAULT_WORLD: USE_FALLBACK_DEFAULT_WORLD === "true"
 }
 
 export default Config;

packages/webcave-server/src/config/types.ts

@@ -14,4 +14,5 @@ export type AppConfig = {
   WORLD_FILE_NAME: string
   WORLD_FILE_FOLDER: string
   CORS_POLICY: CorsOptions
+  USE_FALLBACK_DEFAULT_WORLD: boolean
 }

packages/webcave-server/src/game/world.ts

@@ -17,6 +17,10 @@ class ServerWorld extends World {
     return path.join(process.cwd(), this.worldSaveDirName, this.worldSaveFileName);
   }
 
+  public getDefaultWorldFilePath() {
+    return path.join(process.cwd(), "worlds", "default.world")
+  }
+
   public prepareNewSaveDir() {
     const dir = path.join(process.cwd(), this.worldSaveDirName);
 
@@ -25,9 +29,9 @@ class ServerWorld extends World {
     }
   }
 
-  public loadFromFile() {
+  public loadFromFile(_path?: string) {
     try {
-      const path = this.getWorldFilePath();
+      const path = _path || this.getWorldFilePath();
       const data = FileUtil.readFileSync(path).toString('utf8');
 
       const [spawnX, spawnY, spawnZ] = data.split(',');