From 98628957a441d507fff2b5dfa923099a8de3781f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?David=20N=C3=A9grier?= <d.negrier@thecodingmachine.com>
Date: Mon, 11 May 2020 18:49:20 +0200
Subject: [PATCH] Refactoring "exit" to allow multiple maps

Adding several layers named "exit" causes issues with Phaser 3.
This PR makes any possible layer being an exit layer (it only depends on the exitUrl property)

Also, fixing start position (it takes into account the layer width now)
---
 README.md                               |  2 +-
 back/src/Assets/Maps/Floor0/floor0.json | 44 +++++++++++++++++--------
 front/src/Phaser/Game/GameScene.ts      | 27 ++++++++++-----
 3 files changed, 51 insertions(+), 22 deletions(-)

diff --git a/README.md b/README.md
index a165a494..7883a4e0 100644
--- a/README.md
+++ b/README.md
@@ -47,7 +47,7 @@ A few things to notice:
 
 In order to place an on your scene that leads to another scene:
 
-- You must create an "exit" layer. The layer name MUST be "exit".
+- You must create an specific layer. When a character reaches ANY tile of that layer, it will exit the scene.
 - In layer properties, you must add "exitSceneUrl" property. It represents the map URL of the next scene. For example : `/<map folder>/<map>.json`. Be careful, if you want the next map to be correctly loaded, you must check that the map files are in folder `back/src/Assets/Maps/<your map folder>`. The files will be accessible by url `<HOST>/map/files/<your map folder>/...`.
 - If you want to have multiple exits, you can create many layers with name "exit". Each layer has a different key `exitSceneUrl` and have tiles that represent exits to another scene.
 
diff --git a/back/src/Assets/Maps/Floor0/floor0.json b/back/src/Assets/Maps/Floor0/floor0.json
index d453ac6b..001cde1c 100644
--- a/back/src/Assets/Maps/Floor0/floor0.json
+++ b/back/src/Assets/Maps/Floor0/floor0.json
@@ -9,7 +9,7 @@
      "export":
         {
          "format":"json",
-         "target":"map.json"
+         "target":"back\/src\/Assets\/Maps\/Floor0\/map.json"
         }
     },
  "height":18,
@@ -22,7 +22,7 @@
          "name":"background",
          "opacity":1,
          "type":"tilelayer",
-         "visible":true,
+         "visible":false,
          "width":46,
          "x":0,
          "y":0
@@ -34,7 +34,7 @@
          "name":"start",
          "opacity":1,
          "type":"tilelayer",
-         "visible":true,
+         "visible":false,
          "width":46,
          "x":0,
          "y":0
@@ -43,7 +43,7 @@
          "data":[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 309, 309, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 309, 309, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
          "height":18,
          "id":10,
-         "name":"exit",
+         "name":"exit1",
          "opacity":1,
          "properties":[
                 {
@@ -52,17 +52,35 @@
                  "value":"\/Floor1\/floor1.json"
                 }],
          "type":"tilelayer",
+         "visible":false,
+         "width":46,
+         "x":0,
+         "y":0
+        }, 
+        {
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+         "height":18,
+         "id":2,
+         "name":"bottom",
+         "opacity":1,
+         "type":"tilelayer",
          "visible":true,
          "width":46,
          "x":0,
          "y":0
         }, 
         {
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          "height":18,
-         "id":2,
-         "name":"bottom",
+         "id":12,
+         "name":"exit2",
          "opacity":1,
+         "properties":[
+                {
+                 "name":"exitSceneUrl",
+                 "type":"string",
+                 "value":"\/Lyon\/lyon.json"
+                }],
          "type":"tilelayer",
          "visible":true,
          "width":46,
@@ -76,7 +94,7 @@
          "name":"top",
          "opacity":1,
          "type":"tilelayer",
-         "visible":true,
+         "visible":false,
          "width":46,
          "x":0,
          "y":0
@@ -88,7 +106,7 @@
          "name":"book",
          "opacity":1,
          "type":"tilelayer",
-         "visible":true,
+         "visible":false,
          "width":46,
          "x":0,
          "y":0
@@ -100,7 +118,7 @@
          "name":"ordi",
          "opacity":1,
          "type":"tilelayer",
-         "visible":true,
+         "visible":false,
          "width":46,
          "x":0,
          "y":0
@@ -112,7 +130,7 @@
          "objects":[],
          "opacity":1,
          "type":"objectgroup",
-         "visible":true,
+         "visible":false,
          "x":0,
          "y":0
         }, 
@@ -129,12 +147,12 @@
                  "value":3
                 }],
          "type":"tilelayer",
-         "visible":true,
+         "visible":false,
          "width":46,
          "x":0,
          "y":0
         }],
- "nextlayerid":12,
+ "nextlayerid":13,
  "nextobjectid":1,
  "orientation":"orthogonal",
  "renderorder":"right-down",
diff --git a/front/src/Phaser/Game/GameScene.ts b/front/src/Phaser/Game/GameScene.ts
index 26b4fe95..7c380a48 100644
--- a/front/src/Phaser/Game/GameScene.ts
+++ b/front/src/Phaser/Game/GameScene.ts
@@ -107,7 +107,7 @@ export class GameScene extends Phaser.Scene implements GameSceneInterface, Creat
             if (layer.type === 'tilelayer') {
                 this.addLayer(this.Map.createStaticLayer(layer.name, this.Terrains, 0, 0).setDepth(depth));
             }
-            if (layer.type === 'tilelayer' && layer.name === "exit") {
+            if (layer.type === 'tilelayer' && this.getExitSceneUrl(layer) !== undefined) {
                 this.loadNextGame(layer, this.map.width, this.map.tilewidth, this.map.tileheight);
             }
             if (layer.type === 'tilelayer' && layer.name === "start") {
@@ -153,6 +153,18 @@ export class GameScene extends Phaser.Scene implements GameSceneInterface, Creat
         this.circleTexture.refresh();
     }
 
+    private getExitSceneUrl(layer: ITiledMapLayer): string|undefined {
+        let properties : any = layer.properties;
+        if (!properties) {
+            return undefined;
+        }
+        let obj = properties.find((property:any) => property.name === "exitSceneUrl");
+        if (obj === undefined) {
+            return undefined;
+        }
+        return obj.value;
+    }
+
     /**
      *
      * @param layer
@@ -161,15 +173,14 @@ export class GameScene extends Phaser.Scene implements GameSceneInterface, Creat
      * @param tileHeight
      */
     private loadNextGame(layer: ITiledMapLayer, mapWidth: number, tileWidth: number, tileHeight: number){
-        let properties : any = layer.properties;
-        let exitSceneUrl = properties.find((property:any) => property.name === "exitSceneUrl");
+        let exitSceneUrl = this.getExitSceneUrl(layer);
 
-        let exitSceneKey = getMapKeyByUrl(exitSceneUrl.value);
+        let exitSceneKey = getMapKeyByUrl(exitSceneUrl);
 
         let gameIndex = this.scene.getIndex(exitSceneKey);
         let game : Phaser.Scene = null;
         if(gameIndex === -1){
-            game = new GameScene(exitSceneKey, `${MAP_FILE_URL}${exitSceneUrl.value}`);
+            game = new GameScene(exitSceneKey, `${MAP_FILE_URL}${exitSceneUrl}`);
             this.scene.add(exitSceneKey, game, false);
         }else{
             game = this.scene.get(exitSceneKey);
@@ -186,6 +197,7 @@ export class GameScene extends Phaser.Scene implements GameSceneInterface, Creat
             let y : number = parseInt(((key + 1) / mapWidth).toString());
             let x : number = key - (y * mapWidth);
             //push and save switching case
+            // TODO: this is not efficient. We should refactor that to enable a search by key. For instance: this.PositionNextScene[y][x] = exitSceneKey
             this.PositionNextScene.push({
                 xStart: (x * tileWidth),
                 yStart: (y * tileWidth),
@@ -205,9 +217,8 @@ export class GameScene extends Phaser.Scene implements GameSceneInterface, Creat
             if(objectKey === 0){
                 return;
             }
-            let y = (key / 45);
-            y = parseInt(`${y}`);
-            let x = key - (y * 46);
+            let y = Math.floor(key / layer.width);
+            let x = key % layer.width;
 
             this.startX = (x * 32);
             this.startY = (y * 32);