vk-mute/src/dom/hide_element.js

import {getChatBody} from "../utils/getChatBody";
import {tryToAddControls, hideExistingMessages} from "./controls";

export function addNewMessageEventListener() {
    const chatBody = getChatBody();
    chatBody.addEventListener('DOMNodeInserted', function(event) {
        newMessageHandler(event.target)
    });
}

function newMessageHandler(message) {
    tryToAddControls(message);
    if (message.className === 'im-mess-stack _im_mess_stack ') {
        chrome.storage.sync.get('isExtensionOn', function(data) {
            if (data.isExtensionOn) {
                chrome.storage.sync.get('idsToHide', function(data) {
                    if (data.idsToHide.filter(user => user.id == message.dataset.peer).length > 0) {
                        message.style.display = "none";
                    }
                });
            }
        });
    }
}

export function returnMessagesEventListener() {
    chrome.storage.onChanged.addListener(function(changes) {
        const isExtensionOn = changes.isExtensionOn;
        const idsToHide = changes.idsToHide;
        const chatBody = getChatBody();
        if (isExtensionOn) {
            if (isExtensionOn.newValue === false) {
                for (let item of chatBody.children) {
                    item.style.display = "block";
                }
            } else {
                hideExistingMessages();
            }
        }
        if (idsToHide) {
            chrome.storage.sync.get('isExtensionOn', function(data) {
                if (data.isExtensionOn) {
                    if (idsToHide.newValue.length < idsToHide.oldValue.length) {
                        // for (let item of chatBody.children) {
                        //     item.style.display = "block";
                        // }
                        // hideExistingMessages();
                        for (let item of chatBody.children) {
                            if (idsToHide.newValue.filter(user => user.id == item.dataset.peer).length === 0) {
                                item.style.display = "block";
                            }
                        }
                    }
                }
            });
        }
    });
}