delete_facebook_messenger_messages.js

const allATags = document.querySelectorAll('a');
const matchingATags = [];
allATags.forEach((aTag) => {
  const href = aTag.getAttribute('href');
  if (href && href.startsWith('/messages/t/')) {
    matchingATags.push(aTag);
  }
});

function findParentWithRoleRow(element) {
  while (element && element.getAttribute('role') !== 'row') {
    element = element.parentElement;
  }
  return element;
}

function openMenuFromRow(parentRow){
  const gridCells = parentRow.querySelectorAll('div[role="gridcell"]');
  const secondGridCell = gridCells[1];
  const button = secondGridCell.querySelector("div[role=button]");
  setTimeout(()=>{button.click(); console.log("Menu opened")}, 500)
  
}

function waitForMenu(retries = 10, delay = 300) {
  return new Promise((resolve, reject) => {
    const check = (attempt = 0) => {
      let menu = document.querySelector("div[role=menu]");
      if (menu) return resolve(menu);
      if (attempt >= retries) return reject("Menu not found");
      setTimeout(() => check(attempt + 1), delay);
    };
    check();
  });
}

async function findMenuClickDelete() {
  try {
    let menu = await waitForMenu();
    console.log("menu found.");

    let menuItems = menu.querySelectorAll("div[role=menuitem]");

    console.log("Clicking delete option");
    for (let i = 0; i < menuItems.length; i++) {
      let parentMenuItem = menuItems[i];
      let spanWithinParent = parentMenuItem.querySelector("span");
      if (spanWithinParent && spanWithinParent.textContent.trim() === "Delete chat") {
        parentMenuItem.click();
        break;
      }
    }

    setTimeout(() => {
      console.log("Confirming Delete");
      let delDialogue = document.querySelectorAll('[aria-label="Delete chat"]');
      if (delDialogue[2]) {
        delDialogue[2].click();
      } else {
        console.warn("Delete confirmation not found.");
      }
    }, 700);
  } catch (e) {
    console.error(e);
  }
}


async function processMatchingATags() {

  for (let index = 0; index < matchingATags.length; index++) {
    const aTag = matchingATags[index];
    const delay =  1500;

    await new Promise((resolve) => setTimeout(resolve, delay));
    console.log(delay, "ms delay");
    console.log("processing index", index ,"/", matchingATags.length);
    let parentRow = findParentWithRoleRow(aTag);

    await new Promise((resolve) => setTimeout(resolve, 1000));
    openMenuFromRow(parentRow);

    await new Promise((resolve) => setTimeout(resolve, 750));
    findMenuClickDelete();

  }
}

processMatchingATags();