83 lines
2.3 KiB
JavaScript
83 lines
2.3 KiB
JavaScript
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window.fileStore = new (function(){
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var db;
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var indexedDB;
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this.requestGameFiles = requestGameFiles;
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function requestGameFiles(callback) {
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indexedDB = window.indexedDB
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|| window.webkitIndexedDB
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|| window.mozIndexedDB
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|| window.shimIndexedDB;
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var request = indexedDB.open("MKJS_DB", 1);
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request.onerror = window.onerror;
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request.onsuccess = function(event) {
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db = event.target.result;
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loadGameFiles(callback);
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}
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request.onupgradeneeded = function(event) {
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db = event.target.result;
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var objectStore = db.createObjectStore("files", { keyPath: "filename" });
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objectStore.transaction.oncomplete = function(event) {
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loadGameFiles(callback);
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}
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}
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}
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function loadGameFiles(callback) {
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var transaction = db.transaction(["files"]);
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var objectStore = transaction.objectStore("files");
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var request = objectStore.get("mkds.nds");
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request.onerror = function(event) {
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alert("Fatal database error!");
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};
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request.onsuccess = function(event) {
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if (request.result == null) downloadGame("Mario Kart DS.nds", callback);
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else callback(request.result.data);
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};
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}
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function downloadGame(url, callback) {
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if (typeof url == "string") {
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var xml = new XMLHttpRequest();
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xml.open("GET", url, true);
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xml.responseType = "arraybuffer";
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xml.onload = function() {
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storeGame(xml.response, callback);
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}
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xml.send();
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} else {
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alert("You need to supply MKJS with a Mario Kart DS ROM to function. Click anywhere on the page to load a file.")
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fileCallback = callback;
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document.getElementById("fileIn").onchange = fileInChange;
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waitForROM = true;
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}
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}
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function fileInChange(e) {
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var bFile = e.target.files[0];
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var bReader = new FileReader();
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bReader.onload = function(e) {
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waitForROM = false; //todo: verify
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storeGame(e.target.result, fileCallback);
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};
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bReader.readAsArrayBuffer(bFile);
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}
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function storeGame(dat, callback) {
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var transaction = db.transaction(["files"], "readwrite");
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var objectStore = transaction.objectStore("files");
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var request = objectStore.put({filename:"mkds.nds", data:dat});
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request.onerror = function(event) {
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alert("Failed to store game locally!");
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callback(dat);
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};
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request.onsuccess = function(event) {
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callback(dat);
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};
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}
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})();
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