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utils.js
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utils.js
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function debug(f)
{
function g()
{
try {
return f(...arguments);
} catch(e) {
console.log(e.stack);
alert("An unexpected error occurred.");
}
}
return g;
}
function debug_async(f)
{
async function g()
{
try {
return await f(...arguments);
} catch(e) {
console.log(e.stack);
alert("An unexpected error occurred.");
}
}
return g;
}
function isString(v)
{
return typeof v == "string";
}
function isNumber(v)
{
return typeof v == "number";
}
function isArray(v)
{
return Array.isArray(v);
}
class JSONStorage
{
constructor()
{
this.dict = {};
}
get(key)
{
const json = this.dict[key];
if (json === undefined) return undefined;
try {
return JSON.parse(json);
} catch (e) {
console.log("Failed to parse: " + json);
}
}
set(key, value, store_locally)
{
value = JSON.stringify(value);
this.dict[key] = value;
if (store_locally === false) return;
try {
localStorage.setItem(key, value);
} catch(e) {
console.log("Failed to write to localStorage");
}
}
load_from_local_storage()
{
try {
for (let i = 0; i < localStorage.length; ++i) {
const key = localStorage.key(i);
this.dict[key] = localStorage.getItem(key);
}
} catch(e) {
// TODO
console.log("Failed to read localStorage");
}
}
}
const storage = new JSONStorage();
storage.load_from_local_storage();