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construct/modules/static/js/storage.js
2017-12-24 19:26:05 -07:00

133 lines
3.5 KiB
JavaScript

/*
* IRCd Charybdis 5/Matrix
*
* Copyright (C) 2017 Charybdis Development Team
* Copyright (C) 2017 Jason Volk (jason@zemos.net)
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice is present in all copies.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*/
'use strict';
/**************************************
*
* Local & Session storage
*
* Lifetimes in order from most persistent to most transient:
*
* + mc.account - synchronized with server account_data (requires auth)
* + mc.local - synchronized with window localStorage
* + mc.session - synchronized with window sessionStorage
* + mc.instance - not synchronized; lifetime is the same as mc object.
*
* Note that the storage objects are serialized to JSON when actually being stored.
* Anything placed inside a live storage object should have a JSON representation.
*
* Note that storage is partitioned based on the mc.opts.base_url. This ensures
* if the target server changes for whatever reason the webstorage objects will be
* different for different base URL's.
*
*/
mc.storage = {};
/* Reads from webstorage into the client's webstorage globals.
*/
mc.storage.init = function()
{
let prefix = mc.opts.base_url.hash();
let update = (facility, target) =>
{
let item = facility.getItem(prefix);
if(item == null)
return;
let data = JSON.parse(item);
Object.update(target, data);
};
update(localStorage, mc.local);
update(sessionStorage, mc.session);
//console.log("read local storage objects");
if(typeof(mc.session.model) != "object")
mc.session.model = {};
mc.model = mc.session.model;
if(typeof(mc.model.show) != "object")
mc.model.show = {};
mc.show = mc.model.show;
};
/** Writes back the client's webstorage objects.
*/
mc.storage.sync = function()
{
let prefix = mc.opts.base_url.hash();
let update = (facility, source) =>
{
let item = JSON.stringify(source);
facility.setItem(prefix, item);
};
update(localStorage, mc.local);
update(sessionStorage, mc.session);
//console.log("wrote local storage objects");
};
/**
* account_data based storage
*/
mc.storage.account = {};
/** Update account-based storage object
*/
mc.storage.account.update = function(data)
{
Object.update(mc.account, data);
};
/** Write back account-based storage to server
*/
mc.storage.account.sync = function()
{
if(!mc.instance.authentic)
return false;
return mc.storage.account.sync.data();
};
mc.storage.account.sync.data = async function()
{
let data = mc.account;
let user_id = mc.my.mxid;
let type = mc.opts.account_data.key;
if(empty(data))
return;
let request = mc.m.user.account_data.put(user_id, type, data); try
{
let response = await request.response;
}
catch(error)
{
console.error("Error synchronizing account_data: " + error);
}
};