Haketilo

/**

 * This file is part of Haketilo.

 *

 * Function: Show details of how Haketilo handled given page, drive popup.

 *

 * Copyright (C) 2021,2022 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.

 */

#FROM common/browser.js   IMPORT browser

#FROM common/misc.js      IMPORT is_privileged_url

#FROM html/DOM_helpers.js IMPORT by_id

#FROM html/repo_query.js  IMPORT RepoQueryView

const tab_query = {currentWindow: true, active: true};

async function get_current_tab() {

#IF CHROMIUM

    const callback = (cb) => browser.tabs.query(tab_query, tab => cb(tab));

    const promise = new Promise(callback);

#ELIF MOZILLA

    const promise = browser.tabs.query(tab_query);

#ENDIF

    try {

	return (await promise)[0];

    } catch(e) {

	console.log("Haketilo:", e);

    }

}

async function get_page_info(tab_id) {

    return browser.tabs.sendMessage(tab_id, ["page_info"]);

}

function show_page_info(page_info) {

    by_id("loading_info").remove();

    by_id("info_form").classList.remove("hide");

    by_id("page_url").innerText = page_info.url;

    if (page_info.privileged) {

	by_id("privileged_page_info").classList.remove("hide");

    } else {

	by_id("unprivileged_page_info").classList.remove("hide");

	by_id("scripts_blocked").innerText = page_info.allow ? "no" : "yes";

	let payload_text = "None";

	if (page_info.payload) {

	    if ("error" in page_info) {

		let long_msg = true;

		if (page_info.error.haketilo_error_type === "missing")

		    payload_text = `None (error: resource with id '${page_info.error.id}' missing from the database)`;

		else if (page_info.error.haketilo_error_type === "circular")

		    payload_text = `None (error: circular dependency of resource with id '${page_info.error.id}' on itself)`;

		else if (page_info.error.haketilo_error_type === "db")

		    payload_text = `None (error: failure reading Haketilo internal database)`;

		else if (page_info.error.haketilo_error_type === "other")

		    payload_text = `None (error: unknown failure occured)`;

		else

		    long_msg = false;

		if (long_msg)

		    by_id("injected_payload").classList.add("long_msg");

	    } else {

		payload_text = page_info.payload.identifier;

	    }

	}

	by_id("injected_payload").innerText = payload_text;

	const scripts_fate = page_info.allow ? "allowed" : "blocked";

	let mapping_text, long_msg = true;

	if (page_info.mapping === "~allow") {

	    mapping_text = `None (scripts ${scripts_fate} by a rule)`;

	} else if ("error" in page_info &&

		   page_info.error.haketilo_error_type === "deciding_policy") {

	    mapping_text = `None (error occured when determining policy)`;

	} else if (page_info.mapping) {

	    mapping_text = page_info.mapping;

	    long_msg = false;

	} else {

	    mapping_text = `None (scripts ${scripts_fate} by default policy)`;

	}

	by_id("mapping_used").innerText = mapping_text;

	if (long_msg)

	    by_id("mapping_used").classList.add("long_msg");

    }

}

function repo_query_showing(show) {

    for (const [id, i] of [["repo_query", 0], ["page_info", 1]])

	by_id(`${id}_container`).classList[["add", "remove"][show ^ i]]("hide");

}

function prepare_repo_query_view(tab, page_info) {

    const repo_query_view = new RepoQueryView(tab,

					      () => repo_query_showing(true),

					      () => repo_query_showing(false));

    by_id("repo_query_container").prepend(repo_query_view.main_div);

    let search_cb = () => repo_query_view.show(page_info.url);

    search_cb = repo_query_view.when_hidden(search_cb);

    by_id("search_resources_but").addEventListener("click", search_cb);

    by_id("search_resources_but").classList.remove("hide");

}

async function main() {

    const settings_opener = (e) => browser.runtime.openOptionsPage();

    by_id("settings_but").addEventListener("click", settings_opener);

    try {

	var tab = await get_current_tab();

	var tab_id = tab.id;

	if (is_privileged_url(tab.url))

	    var page_info = {privileged: true, url: tab.url};

	else

	    var page_info = await get_page_info(tab_id);

    } catch(e) {

	console.error("Haketilo:", e);

    }

    if (page_info) {

	show_page_info(page_info);

	if (!page_info.privileged)

	    prepare_repo_query_view(tab, page_info);

    } else {

	by_id("loading_info").innerText =

	    "Page info not avaialable. Try reloading the page.";

    }

}

main();