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/**
* This file is part of Haketilo.
*
* Function: Instantiate the Pattern Tree data structure, filled with mappings
* from IndexedDB.
*
* 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/patterns_query_tree.js AS pqt
#IMPORT common/indexeddb.js AS haketilodb
#IF MOZILLA || MV3
#FROM common/browser.js IMPORT browser
#ENDIF
let secret;
const tree = pqt.make();
#EXPORT tree
const current_mappings = new Map();
#IF MOZILLA || MV3
let registered_script = null;
let script_update_occuring = false;
let script_update_needed;
async function update_content_script()
{
if (script_update_occuring)
return;
script_update_occuring = true;
while (script_update_needed) {
script_update_needed = false;
const code = `\
this.haketilo_secret = ${secret};
this.haketilo_pattern_tree = ${JSON.stringify(tree)};
if (this.haketilo_content_script_main)
haketilo_content_script_main();`;
const new_script = await browser.contentScripts.register({
"js": [{code}],
"matches": ["<all_urls>"],
"allFrames": true,
"runAt": "document_start"
});
if (registered_script)
registered_script.unregister();
registered_script = new_script;
}
script_update_occuring = false;
}
function register_mapping(mapping)
{
for (const [pattern, resource] of Object.entries(mapping.payloads))
pqt.register(tree, pattern, mapping.identifier, resource);
current_mappings.set(mapping.identifier, mapping);
}
#ENDIF
function mapping_changed(change)
{
console.log('mapping changes!', arguments);
const old_version = current_mappings.get(change.key);
if (old_version !== undefined) {
for (const pattern in old_version.payloads)
pqt.deregister(tree, pattern, change.key);
current_mappings.delete(change.key);
}
if (change.new_val !== undefined)
register_mapping(change.new_val);
#IF MOZILLA || MV3
script_update_needed = true;
setTimeout(update_content_script, 0);
#ENDIF
}
async function start(secret_)
{
secret = secret_;
const [tracking, initial_mappings] =
await haketilodb.track.mappings(mapping_changed);
initial_mappings.forEach(register_mapping);
#IF MOZILLA || MV3
script_update_needed = true;
await update_content_script();
#ENDIF
}
#EXPORT start
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