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path: root/src/background.ts
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import * as CompileConfig from "../config.json";

import Config from "./config";
import { Registration } from "./types";
import "content-scripts-register-polyfill";
import { sendRealRequestToCustomServer, setupBackgroundRequestProxy } from "../maze-utils/src/background-request-proxy";
import { setupTabUpdates } from "../maze-utils/src/tab-updates";
import { generateUserID } from "../maze-utils/src/setup";

// Make the config public for debugging purposes

window.SB = Config;

import Utils from "./utils";
import { getExtensionIdsToImportFrom } from "./utils/crossExtension";
import { isFirefoxOrSafari } from "../maze-utils/src";
import { injectUpdatedScripts } from "../maze-utils/src/cleanup";
import { logWarn } from "./utils/logger";
import { chromeP } from "../maze-utils/src/browserApi";
const utils = new Utils({
    registerFirefoxContentScript,
    unregisterFirefoxContentScript
});

const popupPort: Record<string, chrome.runtime.Port> = {};

// Used only on Firefox, which does not support non persistent background pages.
const contentScriptRegistrations = {};

// Register content script if needed
utils.wait(() => Config.isReady()).then(function() {
    if (Config.config.supportInvidious) utils.setupExtraSiteContentScripts();
});

setupBackgroundRequestProxy();
setupTabUpdates(Config);

chrome.runtime.onMessage.addListener(function (request, sender, callback) {
    switch(request.message) {
        case "openConfig":
            chrome.tabs.create({url: chrome.runtime.getURL('options/options.html' + (request.hash ? '#' + request.hash : ''))});
            return false;
        case "openHelp":
            chrome.tabs.create({url: chrome.runtime.getURL('help/index.html')});
            return false;
        case "openPage":
            chrome.tabs.create({url: chrome.runtime.getURL(request.url)});
            return false;
        case "submitVote":
            submitVote(request.type, request.UUID, request.category).then(callback);

            //this allows the callback to be called later
            return true;
        case "registerContentScript":
            registerFirefoxContentScript(request);
            return false;
        case "unregisterContentScript":
            unregisterFirefoxContentScript(request.id)
            return false;
        case "tabs": {
            chrome.tabs.query({
                active: true,
                currentWindow: true
            }, tabs => {
                chrome.tabs.sendMessage(
                    tabs[0].id,
                    request.data,
                    (response) => {
                        callback(response);
                    }
                );
            });
            return true;
        }
        case "time":
        case "infoUpdated":
        case "videoChanged":
            if (sender.tab) {
                try {
                    popupPort[sender.tab.id]?.postMessage(request);
                } catch (e) {
                    // This can happen if the popup is closed
                }
            }
            return false;
        default:
            return false;
	}
});

chrome.runtime.onMessageExternal.addListener((request, sender, callback) => {
    if (getExtensionIdsToImportFrom().includes(sender.id)) {
        if (request.message === "requestConfig") {
            callback({
                userID: Config.config.userID,
                allowExpirements: Config.config.allowExpirements,
                showDonationLink: Config.config.showDonationLink,
                showUpsells: Config.config.showUpsells,
                darkMode: Config.config.darkMode,
            })
        }
    }
});

chrome.runtime.onConnect.addListener((port) => {
    if (port.name === "popup") {
        chrome.tabs.query({
            active: true,
            currentWindow: true
        }, tabs => {
            popupPort[tabs[0].id] = port;
        });
    }
});

//add help page on install
chrome.runtime.onInstalled.addListener(function () {
    // This let's the config sync to run fully before checking.
    // This is required on Firefox
    setTimeout(async () => {
        const userID = Config.config.userID;

        // If there is no userID, then it is the first install.
        if (!userID){
            //open up the install page
            chrome.tabs.create({url: chrome.extension.getURL("/help/index.html")});

            //generate a userID
            const newUserID = generateUserID();
            //save this UUID
            Config.config.userID = newUserID;

            // Don't show update notification
            Config.config.categoryPillUpdate = true;
        }

        if (Config.config.supportInvidious) {
            if (!(await utils.containsInvidiousPermission())) {
                chrome.tabs.create({url: chrome.extension.getURL("/permissions/index.html")});
            }
        }
    }, 1500);

    // Only do this once the old version understands how to clean itself up
    if (!isFirefoxOrSafari() && chrome.runtime.getManifest().version !== "5.4.13") {
        injectUpdatedScripts().catch(logWarn);
    }
});

/**
 * Only works on Firefox.
 * Firefox requires that it be applied after every extension restart.
 *
 * @param {JSON} options
 */
async function registerFirefoxContentScript(options: Registration) {
    if ("scripting" in chrome && "getRegisteredContentScripts" in chrome.scripting) {
        const existingRegistrations = await chromeP.scripting.getRegisteredContentScripts({
            ids: [options.id]
        }).catch(() => []);

        if (existingRegistrations.length > 0 
            && existingRegistrations[0].matches.every((match) => options.matches.includes(match))) {
            // No need to register another script, already registered
            return;
        }
    }

    await unregisterFirefoxContentScript(options.id);

    if ("scripting" in chrome && "getRegisteredContentScripts" in chrome.scripting) {
        await chromeP.scripting.registerContentScripts([{
            id: options.id,
            runAt: "document_start",
            matches: options.matches,
            allFrames: options.allFrames,
            js: options.js,
            css: options.css,
            persistAcrossSessions: true,
        }]);
    } else {
        chrome.contentScripts.register({
            allFrames: options.allFrames,
            js: options.js?.map?.(file => ({file})),
            css: options.css?.map?.(file => ({file})),
            matches: options.matches
        }).then((registration) => void (contentScriptRegistrations[options.id] = registration));
    }

}

/**
 * Only works on Firefox.
 * Firefox requires that this is handled by the background script
 */
async function  unregisterFirefoxContentScript(id: string) {
    if ("scripting" in chrome && "getRegisteredContentScripts" in chrome.scripting) {
        try {
            await chromeP.scripting.unregisterContentScripts({
                ids: [id]
            });
        } catch (e) {
            // Not registered yet
        }
    } else {
        if (contentScriptRegistrations[id]) {
            contentScriptRegistrations[id].unregister();
            delete contentScriptRegistrations[id];
        }
    }
}

async function submitVote(type: number, UUID: string, category: string) {
    let userID = Config.config.userID;

    if (userID == undefined || userID === "undefined") {
        //generate one
        userID = generateUserID();
        Config.config.userID = userID;
    }

    const typeSection = (type !== undefined) ? "&type=" + type : "&category=" + category;

    //publish this vote
    const response = await asyncRequestToServer("POST", "/api/voteOnSponsorTime?UUID=" + UUID + "&userID=" + userID + typeSection);

    if (response.ok) {
        return {
            successType: 1,
            responseText: await response.text()
        };
    } else if (response.status == 405) {
        //duplicate vote
        return {
            successType: 0,
            statusCode: response.status,
            responseText: await response.text()
        };
    } else {
        //error while connect
        return {
            successType: -1,
            statusCode: response.status,
            responseText: await response.text()
        };
    }
}


async function asyncRequestToServer(type: string, address: string, data = {}) {
    const serverAddress = Config.config.testingServer ? CompileConfig.testingServerAddress : Config.config.serverAddress;

    return await (sendRealRequestToCustomServer(type, serverAddress + address, data));
}