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Store binary in IndexedDB

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This commit is contained in:
Varun Patil 2020-10-20 15:37:49 +05:30
parent 218b9515a7
commit 709bcdb5bc
1 changed files with 7 additions and 26 deletions
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33
extra/js/drive.js
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@ -1,24 +1,3 @@
// https://stackoverflow.com/a/9458996
function _bytesToBase64(bytes) {
var binary = '';
var len = bytes.byteLength;
for (var i = 0; i < len; i++) {
binary += String.fromCharCode(bytes[i]);
}
return window.btoa(binary);
}
// https://stackoverflow.com/a/21797381
function _base64ToBytes(base64) {
var binary_string = window.atob(base64);
var len = binary_string.length;
var bytes = new Uint8Array(len);
for (var i = 0; i < len; i++) {
bytes[i] = binary_string.charCodeAt(i);
}
return bytes;
}
// Canvas used for image generation // Canvas used for image generation
var generationCanvas = document.createElement('canvas') var generationCanvas = document.createElement('canvas')
window.fileAsyncCache = {}; window.fileAsyncCache = {};
@ -109,8 +88,7 @@ window.loadFileAsync = function(fullPath, bitmap, callback) {
window.saveFile = function(filename) { window.saveFile = function(filename) {
const buf = FS.readFile('/game/' + filename); const buf = FS.readFile('/game/' + filename);
const b64 = _bytesToBase64(buf); localforage.setItem(namespace + filename, buf);
localforage.setItem(namespace + filename, b64);
localforage.getItem(namespace, function(err, res) { localforage.getItem(namespace, function(err, res) {
if (err || !res) res = {}; if (err || !res) res = {};
@ -118,7 +96,7 @@ window.saveFile = function(filename) {
localforage.setItem(namespace, res); localforage.setItem(namespace, res);
}); });
(window.saveCloudFile || (()=>{}))(filename, buf, b64); (window.saveCloudFile || (()=>{}))(filename, buf);
}; };
var loadFiles = function() { var loadFiles = function() {
@ -133,8 +111,11 @@ var loadFiles = function() {
localforage.getItem(namespace + key, (err, res) => { localforage.getItem(namespace + key, (err, res) => {
if (err) return; if (err) return;
const buf = _base64ToBytes(res); // Don't overwrite existing files
FS.writeFile('/game/' + key, buf); const fname = '/game/' + key;
if (FS.analyzePath(fname).exists) return;
FS.writeFile(fname, res);
}); });
}); });
}); });