From: Benjamin Auder <benjamin.auder@somewhere>
Date: Thu, 20 Feb 2020 20:10:39 +0000 (+0100)
Subject: Store state of games VS computer
X-Git-Url: https://git.auder.net/assets/doc/html/pieces/cp.svg?a=commitdiff_plain;h=98b94cc3504937ae0af29a265394dfe52ea1ee67;p=vchess.git

Store state of games VS computer
---

diff --git a/client/src/components/ComputerGame.vue b/client/src/components/ComputerGame.vue
index a5e03b31..c05eea05 100644
--- a/client/src/components/ComputerGame.vue
+++ b/client/src/components/ComputerGame.vue
@@ -11,6 +11,7 @@ BaseGame(
 <script>
 import BaseGame from "@/components/BaseGame.vue";
 import { store } from "@/store";
+import { CompgameStorage } from "@/utils/compgameStorage";
 import Worker from "worker-loader!@/playCompMove";
 export default {
   name: "my-computer-game",
@@ -31,11 +32,6 @@ export default {
       compWorker: null
     };
   },
-  watch: {
-    "gameInfo.fen": function() {
-      this.launchGame();
-    },
-  },
   created: function() {
     // Computer moves web worker logic:
     this.compWorker = new Worker();
@@ -57,36 +53,41 @@ export default {
         let moveIdx = 0;
         let self = this;
         (function executeMove() {
+          // NOTE: BaseGame::play() will trigger processMove() here
           self.$refs["basegame"].play(compMove[moveIdx++], "received");
           if (moveIdx >= compMove.length) {
             self.compThink = false;
             if (self.game.score != "*")
-              //user action
+              // User action
               self.$emit("game-stopped");
           } else setTimeout(executeMove, 500 + animDelay);
         })();
       }, delay);
     };
-    if (this.gameInfo.fen) this.launchGame();
   },
   methods: {
-    launchGame: function() {
+    launchGame: function(game) {
       this.compWorker.postMessage(["scripts", this.gameInfo.vname]);
-      this.compWorker.postMessage(["init", this.gameInfo.fen]);
-      this.vr = new V(this.gameInfo.fen);
-      const mycolor = Math.random() < 0.5 ? "w" : "b";
-      let players = [{ name: "Myself" }, { name: "Computer" }];
-      if (mycolor == "b") players = players.reverse();
+      if (!game) {
+        game = {
+          vname: this.gameInfo.vname,
+          fenStart: V.GenRandInitFen(),
+          mycolor: Math.random() < 0.5 ? "w" : "b",
+          moves: []
+        };
+        game.fen = game.fenStart;
+        if (this.gameInfo.mode == "versus")
+          CompgameStorage.add(game);
+      }
+      this.compWorker.postMessage(["init", game.fen]);
+      this.vr = new V(game.fen);
+      game.players = [{ name: "Myself" }, { name: "Computer" }];
+      if (game.myColor == "b") game.players = game.players.reverse();
+      game.score = "*"; //finished games are removed
       this.currentUrl = document.location.href; //to avoid playing outside page
-      // NOTE: fen and fenStart are redundant in game object
-      this.game = Object.assign({}, this.gameInfo, {
-        fenStart: this.gameInfo.fen,
-        players: players,
-        mycolor: mycolor,
-        score: "*"
-      });
-      this.compWorker.postMessage(["init", this.gameInfo.fen]);
-      if (mycolor != "w" || this.gameInfo.mode == "auto")
+      this.game = game;
+      this.compWorker.postMessage(["init", game.fen]);
+      if (this.gameInfo.mode == "auto" || game.mycolor != this.vr.turn)
         this.playComputerMove();
     },
     // NOTE: a "goto" action could lead to an error when comp is thinking,
@@ -107,6 +108,20 @@ export default {
       ) {
         this.playComputerMove();
       }
+      // Finally, update storage:
+      if (this.gameInfo.mode == "versus") {
+        const allowed_fields = ["appear", "vanish", "start", "end"];
+        const filtered_move = Object.keys(move)
+          .filter(key => allowed_fields.includes(key))
+          .reduce((obj, key) => {
+            obj[key] = move[key];
+            return obj;
+          }, {});
+        CompgameStorage.update(this.gameInfo.vname, {
+          move: filtered_move,
+          fen: move.fen
+        });
+      }
     },
     gameOver: function(score, scoreMsg) {
       this.game.score = score;
diff --git a/client/src/translations/about/fr.pug b/client/src/translations/about/fr.pug
index b38cf095..b7092f02 100644
--- a/client/src/translations/about/fr.pug
+++ b/client/src/translations/about/fr.pug
@@ -1,7 +1,7 @@
 h3 Histoire
 
 p.
-  Ce site est né à la suite d'une discussion avec Patrick bernier, qui m'avait
+  Ce site est né à la suite d'une discussion avec Patrick Bernier, qui m'avait
   parlé d'une variante de son invention : l'Échiqueté ('Checkered' ici),
   impliquant des pièces pouvant être jouées par les deux camps.
   À l'époque en 2012, j'ai développé un premier petit site
diff --git a/client/src/utils/compgameStorage.js b/client/src/utils/compgameStorage.js
new file mode 100644
index 00000000..05a20749
--- /dev/null
+++ b/client/src/utils/compgameStorage.js
@@ -0,0 +1,85 @@
+// (Comp)Game object: {
+//   // Static informations:
+//   vname: string (this is the ID)
+//   fenStart: string,
+//   mycolor: "w" or "b"
+//   // Game (dynamic) state:
+//   fen: string,
+//   moves: array of Move objects,
+// }
+
+import { store } from "@/store";
+
+function dbOperation(callback) {
+  let db = null;
+  let DBOpenRequest = window.indexedDB.open("vchess_comp", 4);
+
+  DBOpenRequest.onerror = function(event) {
+    alert(store.state.tr["Database error: stop private browsing, or update your browser"]);
+    callback("error",null);
+  };
+
+  DBOpenRequest.onsuccess = function(event) {
+    db = DBOpenRequest.result;
+    callback(null,db);
+    db.close();
+  };
+
+  DBOpenRequest.onupgradeneeded = function(event) {
+    let db = event.target.result;
+    let objectStore = db.createObjectStore("compgames", { keyPath: "vname" });
+  };
+}
+
+export const CompgameStorage = {
+  add: function(game) {
+    dbOperation((err,db) => {
+      if (err)
+        return;
+      let transaction = db.transaction("compgames", "readwrite");
+      let objectStore = transaction.objectStore("compgames");
+      objectStore.add(game);
+    });
+  },
+
+  // obj: move and/or fen
+  update: function(gameId, obj) {
+    dbOperation((err,db) => {
+      let objectStore = db
+        .transaction("compgames", "readwrite")
+        .objectStore("compgames");
+      objectStore.get(gameId).onsuccess = function(event) {
+        // Ignoring error silently: shouldn't happen now. TODO?
+        if (event.target.result) {
+          const game = event.target.result;
+          Object.keys(obj).forEach(k => {
+            if (k == "move") game.moves.push(obj[k]);
+            else game[k] = obj[k];
+          });
+          objectStore.put(game); //save updated data
+        }
+      };
+    });
+  },
+
+  // Retrieve any game from its identifier (variant name)
+  // NOTE: need callback because result is obtained asynchronously
+  get: function(gameId, callback) {
+    dbOperation((err,db) => {
+      let objectStore = db.transaction("compgames").objectStore("compgames");
+      objectStore.get(gameId).onsuccess = function(event) {
+        callback(event.target.result);
+      };
+    });
+  },
+
+  // Delete a game in indexedDB
+  remove: function(gameId) {
+    dbOperation((err,db) => {
+      if (!err) {
+        let transaction = db.transaction(["compgames"], "readwrite");
+        transaction.objectStore("compgames").delete(gameId);
+      }
+    });
+  }
+};
diff --git a/client/src/utils/gameStorage.js b/client/src/utils/gameStorage.js
index cc7dca5b..ce609af0 100644
--- a/client/src/utils/gameStorage.js
+++ b/client/src/utils/gameStorage.js
@@ -7,7 +7,6 @@
 //   cadence: string,
 //   increment: integer (seconds),
 //   type: string ("live" or "corr")
-//   imported: boolean (optional, default false)
 //   // Game (dynamic) state:
 //   fen: string,
 //   moves: array of Move objects,
diff --git a/client/src/views/Rules.vue b/client/src/views/Rules.vue
index f864e9e4..00202e64 100644
--- a/client/src/views/Rules.vue
+++ b/client/src/views/Rules.vue
@@ -40,6 +40,7 @@ main
 import ComputerGame from "@/components/ComputerGame.vue";
 import { store } from "@/store";
 import { getDiagram } from "@/utils/printDiagram";
+import { CompgameStorage } from "@/utils/compgameStorage";
 export default {
   name: "my-rules",
   components: {
@@ -54,7 +55,6 @@ export default {
       gameInfo: {
         vname: "",
         mode: "versus",
-        fen: ""
       }
     };
   },
@@ -118,15 +118,24 @@ export default {
       this.gameInProgress = true;
       this.display = "computer";
       this.gameInfo.mode = mode;
-      this.$set(this.gameInfo, "fen", V.GenRandInitFen());
+      if (this.gameInfo.mode == "versus") {
+        CompgameStorage.get(this.gameInfo.vname, (game) => {
+          // NOTE: game might be null
+          this.$refs["compgame"].launchGame(game);
+        });
+      } else {
+        this.$refs["compgame"].launchGame();
+      }
     },
-    // user is willing to stop the game:
+    // user wants to stop the game:
     stopGame: function() {
       this.$refs["compgame"].gameOver("?", "Undetermined result");
     },
     // The game is effectively stopped:
     gameStopped: function() {
       this.gameInProgress = false;
+      if (this.gameInfo.mode == "versus")
+        CompgameStorage.remove(this.gameInfo.vname);
     },
     gotoAnalyze: function() {
       this.$router.push(