background.js

browser.linshareExtAPI.onSendBtnClick.addListener(async (id) => {
  let tabs = await browser.tabs.query({ windowType: "messageCompose", windowId: id - 1 });
  let currentTab = tabs[0];
  await sendToLinshare(currentTab).then(async (message) => {
    if (message) {
      browser.linshareExtAPI.prompt("alert", "Something went wrong", message);
    } else await notify(currentTab);
  });
});
if ("browserAction" in browser) {
  browser.browserAction.onClicked.addListener(async () => {
    browser.tabs.create({ url: browser.extension.getURL("content/views/options/options.html") });
  });
}

async function sendToLinshare(tab) {
  let attachments = await browser.compose.listAttachments(tab.id);
  let composeDetails = await browser.compose.getComposeDetails(tab.id);
  let recipients = composeDetails.to.concat(composeDetails.bcc).concat(composeDetails.cc);
  if (attachments.length < 1 || recipients.length < 1) {
    browser.linshareExtAPI.prompt(
      "alert",
      "Empty field",
      "At least one recipient and attachment are required"
    );
    return;
  }
  let files = [];
  for (let i = 0; i < attachments.length; i++) {
    let file = await attachments[i].getFile();
    files.push(file);
  }
  return await browser.linshareExtAPI.sendAndShare(files, recipients);
}

async function notify(tab) {
  let userPrefs = await browser.linshareExtAPI.getUserPrefs();
  let composeDetails = await browser.compose.getComposeDetails(tab.id);
  let parser = new DOMParser();
  let message = parser.parseFromString(composeDetails.body, "text/html");
  let hasMessage = false;
  if (composeDetails.subject.trim().length == 0) {
    browser.compose.setComposeDetails(tab.id, { subject: "Shared documents with Linshare" });
  }
  for (let elem of message.body.children) {
    if (elem.classList.contains("linshare-default-message")) {
      hasMessage = true;
    }
  }
  if (!hasMessage) {
    let defaultMessaage = document.createElement("div");
    let separator = document.createElement("p");
    separator.innerHTML = "- - - - -";
    let defaultText = document.createElement("p");
    defaultText.innerText = userPrefs.message;
    defaultMessaage.appendChild(separator);
    defaultMessaage.appendChild(defaultText);
    defaultMessaage.classList.add("linshare-default-message");
    message.body.append(defaultMessaage);
    browser.compose.setComposeDetails(tab.id, { body: message.body.innerHTML });
  }
  browser.linshareExtAPI.sendMail();
}