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Diffstat (limited to 'common/storage_client.js')
| -rw-r--r-- | common/storage_client.js | 208 |
1 files changed, 0 insertions, 208 deletions
diff --git a/common/storage_client.js b/common/storage_client.js deleted file mode 100644 index fe8d6e6..0000000 --- a/common/storage_client.js +++ /dev/null @@ -1,208 +0,0 @@ -/** - * This file is part of Haketilo. - * - * Function: Storage through messages (client side). - * - * Copyright (C) 2021 Wojtek Kosior - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * As additional permission under GNU GPL version 3 section 7, you - * may distribute forms of that code without the copy of the GNU - * GPL normally required by section 4, provided you include this - * license notice and, in case of non-source distribution, a URL - * through which recipients can access the Corresponding Source. - * If you modify file(s) with this exception, you may extend this - * exception to your version of the file(s), but you are not - * obligated to do so. If you do not wish to do so, delete this - * exception statement from your version. - * - * As a special exception to the GPL, any HTML file which merely - * makes function calls to this code, and for that purpose - * includes it by reference shall be deemed a separate work for - * copyright law purposes. If you modify this code, you may extend - * this exception to your version of the code, but you are not - * obligated to do so. If you do not wish to do so, delete this - * exception statement from your version. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <https://www.gnu.org/licenses/>. - * - * I, Wojtek Kosior, thereby promise not to sue for violation of this file's - * license. Although I request that you do not make use of this code in a - * proprietary program, I am not going to enforce this in court. - */ - -#IMPORT common/connection_types.js AS CONNECTION_TYPE - -#FROM common/browser.js IMPORT browser -#FROM common/stored_types.js IMPORT list_prefixes -#FROM common/once.js IMPORT make_once - -var call_id = 0; -var port; -var calls_waiting = new Map(); - -function set_call_callback(resolve, reject, func, args) -{ - port.postMessage([call_id, func, args]); - calls_waiting.set(call_id++, [resolve, reject]); -} - -async function remote_call(func, args) -{ - return new Promise((resolve, reject) => - set_call_callback(resolve, reject, func, args)); -} - -function handle_message(message) -{ - let callbacks = calls_waiting.get(message.call_id); - if (callbacks === undefined) { - handle_change(message); - return; - } - - let [resolve, reject] = callbacks; - calls_waiting.delete(message.call_id); - if (message.error !== undefined) - setTimeout(reject, 0, message.error); - else - setTimeout(resolve, 0, message.result); -} - -const list_by_prefix = {}; - -for (const prefix of list_prefixes) - list_by_prefix[prefix] = {prefix, listeners : new Set()}; - -var resolve_init; - -function handle_first_message(message) -{ - for (let prefix of Object.keys(message)) - list_by_prefix[prefix].map = new Map(message[prefix]); - - port.onMessage.removeListener(handle_first_message); - port.onMessage.addListener(handle_message); - - resolve_init(); -} - -function handle_change(change) -{ - let list = list_by_prefix[change.prefix]; - - if (change.new_val === undefined) - list.map.delete(change.item); - else - list.map.set(change.item, change.new_val); - - for (let listener_callback of list.listeners) - listener_callback(change); -} - -var exports = {}; - -function start_connection(resolve) -{ - resolve_init = resolve; - port = browser.runtime.connect({name : CONNECTION_TYPE.REMOTE_STORAGE}); - port.onMessage.addListener(handle_first_message); -} - -async function init() { - await new Promise((resolve, reject) => start_connection(resolve)); - return exports; -} - -for (let call_name of ["set", "remove", "replace", "clear"]) - exports [call_name] = (...args) => remote_call(call_name, args); - -// TODO: Much of the code below is copy-pasted from /background/storage.mjs. -// This should later be refactored into a separate module -// to avoid duplication. - -/* - * Facilitate listening to changes - */ - -exports.add_change_listener = function (cb, prefixes=list_prefixes) -{ - if (typeof(prefixes) === "string") - prefixes = [prefixes]; - - for (let prefix of prefixes) - list_by_prefix[prefix].listeners.add(cb); -} - -exports.remove_change_listener = function (cb, prefixes=list_prefixes) -{ - if (typeof(prefixes) === "string") - prefixes = [prefixes]; - - for (let prefix of prefixes) - list_by_prefix[prefix].listeners.delete(cb); -} - -/* Prepare some hepler functions to get elements of a list */ - -function list_items_it(list, with_values=false) -{ - return with_values ? list.map.entries() : list.map.keys(); -} - -function list_entries_it(list) -{ - return list_items_it(list, true); -} - -function list_items(list, with_values=false) -{ - let array = []; - - for (let item of list_items_it(list, with_values)) - array.push(item); - - return array; -} - -function list_entries(list) -{ - return list_items(list, true); -} - -exports.get = function (prefix, item) -{ - return list_by_prefix[prefix].map.get(item); -} - -exports.get_all_names = function (prefix) -{ - return list_items(list_by_prefix[prefix]); -} - -exports.get_all_names_it = function (prefix) -{ - return list_items_it(list_by_prefix[prefix]); -} - -exports.get_all = function (prefix) -{ - return list_entries(list_by_prefix[prefix]); -} - -exports.get_all_it = function (prefix) -{ - return list_entries_it(list_by_prefix[prefix]); -} - -#EXPORT make_once(init) AS get_remote_storage |