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Diffstat (limited to 'common/storage_light.js')
| -rw-r--r-- | common/storage_light.js | 162 |
1 files changed, 0 insertions, 162 deletions
diff --git a/common/storage_light.js b/common/storage_light.js deleted file mode 100644 index 35dfae2..0000000 --- a/common/storage_light.js +++ /dev/null @@ -1,162 +0,0 @@ -/** - * This file is part of Haketilo. - * - * Function: Storage manager, lighter than the previous one. - * - * 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/storage_raw.js AS raw_storage -#IMPORT common/observables.js - -#FROM common/stored_types.js IMPORT TYPE_PREFIX - -const reg_spec = new Set(["\\", "[", "]", "(", ")", "{", "}", ".", "*", "+"]); -const escape_reg_special = c => reg_spec.has(c) ? "\\" + c : c; - -function make_regex(name) -{ - return new RegExp(`^${name.split("").map(escape_reg_special).join("")}\$`); -} - -const listeners_by_callback = new Map(); - -function listen(callback, prefix, name) -{ - let by_prefix = listeners_by_callback.get(callback); - if (!by_prefix) { - by_prefix = new Map(); - listeners_by_callback.set(callback, by_prefix); - } - - let by_name = by_prefix.get(prefix); - if (!by_name) { - by_name = new Map(); - by_prefix.set(prefix, by_name); - } - - let name_reg = by_name.get(name); - if (!name_reg) { - name_reg = name.test ? name : make_regex(name); - by_name.set(name, name_reg); - } -} -#EXPORT listen - -function no_listen(callback, prefix, name) -{ - const by_prefix = listeners_by_callback.get(callback); - if (!by_prefix) - return; - - const by_name = by_prefix.get(prefix); - if (!by_name) - return; - - const name_reg = by_name.get(name); - if (!name_reg) - return; - - by_name.delete(name); - - if (by_name.size === 0) - by_prefix.delete(prefix); - - if (by_prefix.size === 0) - listeners_by_callback.delete(callback); -} -#EXPORT no_listen - -function storage_change_callback(changes, area) -{ -#IF MOZILLA - if (area !== "local") { - console.warn("change in storage area", area); - return; - } -#ENDIF - - for (const item of Object.keys(changes)) { - for (const [callback, by_prefix] of listeners_by_callback.entries()) { - const by_name = by_prefix.get(item[0]); - if (!by_name) - continue; - - for (const reg of by_name.values()) { - if (!reg.test(item.substring(1))) - continue; - - try { - callback(item, changes[item]); - } catch(e) { - console.error(e); - } - } - } - } -} - -raw_storage.listen(storage_change_callback); - - -const created_observables = new Map(); - -async function observe(prefix, name) -{ - const observable = observables.make(); - const callback = (it, ch) => observables.set(observable, ch.newValue); - listen(callback, prefix, name); - created_observables.set(observable, [callback, prefix, name]); - observables.silent_set(observable, await raw_storage.get(prefix + name)); - - return observable; -} -#EXPORT observe - -#EXPORT name => observe(TYPE_PREFIX.VAR, name) AS observe_var - -function no_observe(observable) -{ - no_listen(...created_observables.get(observable) || []); - created_observables.delete(observable); -} -#EXPORT no_observe - -#EXPORT raw_storage.set AS set -#EXPORT raw_storage.set_var AS set_var -#EXPORT raw_storage.get_var AS get_var |