☰

DataCache - Simple storage wrapper

Allows JSON data to be persisted easily by user scripts

Tento skript by nemal byť nainštalovaný priamo. Je to knižnica pre ďalšie skripty, ktorú by mali používať cez meta príkaz // @require https://updategreasyfork.deno.dev/scripts/10443/56962/DataCache%20-%20Simple%20storage%20wrapper.js 

function DataCache(key) {
  this._key = key;
  this._data = {};
  this.load();
}
 
DataCache.prototype = {
  getValue: function(k) {
    return this._data[k];
  },
  setValue: function(k, v) {
    this._data[k] = v;
    this.save();
  },
  deleteValue: function(k) {
    if (k in this._data) {
      delete this._data[k];
      this.save();
    }
  },
  hasValue: function(k) {
    return k in this._data;
  },
  listValues: function() {
    return Object.keys(this._data).sort();
  },
  clear: function() {
    this._data = {};
    this.save();
  },
  save: function() {
    var s = JSON.stringify(this._data);
    GM_setValue(this._key, s);
    console.info('Cache(' + this._key + ') saved: ' + s);
  },
  load: function(s) {
    try {
      this._data = JSON.parse(s || GM_getValue(this._key));
    }
    catch (ex) {
      this.clear();
    }
  },
  edit: function() {
    var res = window.prompt('Edit cached package URLs', JSON.stringify(this._data, null, 2));
    if (res !== null) {
      try {
        this._data = res ? JSON.parse(res) : {};
        this.save();
      }
      catch (ex) {
        console.warn('Failed to update cache data: %s %o', ex.toString(), ex);
      }
    }
  },
  toString: function() {
    return 'Cache(' + this._key + '): [' + this.listValues.join('\n') + ']';
  },
  dump: function() {
    console.log('Cache(' + this._key + '):\n' + JSON.stringify(this._data, null, 2));
  }
};