Request.checkSomething.js

Request.checkSomething = new Class({
    // override Request.JSON and overload results into storage.

    Extends: Request.JSON,

    Implements: Storage,

    options: {
        secure: true
    },

    initialize: function(options) {
        this.storageMethod = 'localStorage';
        this.setupStorage();
        this.parent(options);
    },

    send: function(options) {

        options = options || this.options;

        // check if they are cached. if so, use them instead.
        this.key = options.key;

        var data = this.getItem(this.key);

        if (data) {
            // compat.
            this.onSuccess(data, data);
            this.fireEvent("retrieve", this.key, data);
            return;
        }
        this.parent(options);
    },

    success: function(text, xml){
        // override the success so we can store the result into storage.
        var json;
        try {
            json = this.response.json = JSON.decode(text, this.options.secure);
        } catch (error){
            this.fireEvent('error', [text, error]);
            return;
        }

        if (json == null)
            this.onFailure();
        else {
            // store it.
            this.setItem(this.key, json);
            this.onSuccess(json, text);
        }

    }

});