function openMusic() {
  // only read settings file for first music message
  if ("undefined"==typeof exports._openMusic) {
    exports._openMusic = !!((require('Storage').readJSON("messages.settings.json", true) || {}).openMusic);
  }
  return exports._openMusic;
}
/* Push a new message onto messages queue, event is:
  {t:"add",id:int, src,title,subject,body,sender,tel, important:bool, new:bool}
  {t:"add",id:int, id:"music", state, artist, track, etc} // add new
  {t:"remove",id:int} // remove
  {t:"modify",id:int, title:string} // modified
*/
exports.pushMessage = function(event) {
  var messages = exports.getMessages();
  // now modify/delete as appropriate
  var mIdx = messages.findIndex(m=>m.id==event.id);
  if (event.t=="remove") {
    if (mIdx>=0) messages.splice(mIdx, 1); // remove item
    mIdx=-1;
  } else { // add/modify
    if (event.t=="add"){
      if(event.new === undefined ) { // If 'new' has not been set yet, set it
        event.new=true; // Assume it should be new
      }
    }
    if (mIdx<0) {
      mIdx=0;
      messages.unshift(event); // add new messages to the beginning
    }
    else Object.assign(messages[mIdx], event);
    if (event.id=="music" && messages[mIdx].state=="play") {
      messages[mIdx].new = true; // new track, or playback (re)started
      type = 'music';
    }
  }
  require("Storage").writeJSON("messages.json",messages);
  var message = mIdx<0 ? {id:event.id, t:'remove'} : messages[mIdx];
  // if in app, process immediately
  if ("undefined"!=typeof MESSAGES) return onMessagesModified(message);
  // emit message event
  var type = 'text';
  if (["call", "music", "map"].includes(message.id)) type = message.id;
  if (message.src && message.src.toLowerCase().startsWith("alarm")) type = "alarm";
  Bangle.emit("message", type, message);
  // update the widget icons shown
  if (global.WIDGETS && WIDGETS.messages) WIDGETS.messages.update(messages,true);
  var handleMessage = () => {
    // if no new messages now, make sure we don't load the messages app
    if (event.t=="remove" && exports.messageTimeout && !messages.some(m => m.new)) {
      clearTimeout(exports.messageTimeout);
      delete exports.messageTimeout;
    }
    // ok, saved now
    if (event.id=="music" && Bangle.CLOCK && messages[mIdx].new && openMusic()) {
      // just load the app to display music: no buzzing
      load("messages.app.js");
    } else if (event.t!="add") {
      // we only care if it's new
      return;
    } else if (event.new==false) {
      return;
    }
    // otherwise load messages/show widget
    var loadMessages = Bangle.CLOCK || event.important;
    var quiet = (require('Storage').readJSON('setting.json', 1) || {}).quiet;
    var appSettings = require('Storage').readJSON('messages.settings.json', 1) || {};
    var unlockWatch = appSettings.unlockWatch;
    // don't auto-open messages in quiet mode if quietNoAutOpn is true
    if ((quiet && appSettings.quietNoAutOpn) || appSettings.noAutOpn)
      loadMessages = false;
    delete appSettings;
    // after a delay load the app, to ensure we have all the messages
    if (exports.messageTimeout) clearTimeout(exports.messageTimeout);
    exports.messageTimeout = setTimeout(function() {
      exports.messageTimeout = undefined;
      // if we're in a clock or it's important, go straight to messages app
      if (loadMessages) {
        if (!quiet && unlockWatch) {
          Bangle.setLocked(false);
          Bangle.setLCDPower(1); // turn screen on
        }
        // we will buzz when we enter the messages app
        return load("messages.new.js");
      }
      if (global.WIDGETS && WIDGETS.messages) WIDGETS.messages.update(messages);
      exports.buzz(message.src);
    }, 500);
  };
  setTimeout(()=>{
    if (!message.handled) handleMessage();
  },0);
}
/// Remove all messages
exports.clearAll = function() {
  if ("undefined"!= typeof MESSAGES) { // we're in a messages app, clear that as well
    MESSAGES = [];
  }
  // Clear all messages
  require("Storage").writeJSON("messages.json", []);
  // if we have a widget, update it
  if (global.WIDGETS && WIDGETS.messages)
    WIDGETS.messages.update([]);
  // let message listeners know
  Bangle.emit("message", "clearAll", {}); // guarantee listeners an object as `message`
  // clearAll cannot be marked as "handled"
  // update app if in app
  if ("function"== typeof onMessagesModified) onMessagesModified();
}

/**
 * @returns {array} All messages
 */
exports.getMessages = function() {
  if ("undefined"!=typeof MESSAGES) return MESSAGES; // loaded/managed by app
  return require("Storage").readJSON("messages.json",1)||[];
}

/**
 * Check if there are any messages
 * @returns {string} "new"/"old"/"none"
 */
 exports.status = function() {
  try {
    let status= "none";
    for(const m of exports.getMessages()) {
      if (["music", "map"].includes(m.id)) continue;
      if (m.new) return "new";
      status = "old";
    }
    return status;
  } catch(e) {
    return "none"; // don't bother e.g. the widget with errors
  }
};

/**
 * Start buzzing for new message
 * @param {string} msgSrc Message src to buzz for
 * @return {Promise} Resolves when initial buzz finishes (there might be repeat buzzes later)
 */
exports.buzz = function(msgSrc) {
  exports.stopBuzz(); // cancel any previous buzz timeouts
  if ((require('Storage').readJSON('setting.json',1)||{}).quiet) return Promise.resolve(); // never buzz during Quiet Mode

  var pattern;
  if (msgSrc && msgSrc.toLowerCase() === "phone") {
    // special vibration pattern for incoming calls
    pattern = (require('Storage').readJSON("messages.settings.json", true) || {}).vibrateCalls;
  } else {
    pattern = (require('Storage').readJSON("messages.settings.json", true) || {}).vibrate;
  }
  if (pattern === undefined) { pattern = ":"; } // pattern may be "", so we can't use || ":" here
  if (!pattern) return Promise.resolve();

  var repeat = (require('Storage').readJSON("messages.settings.json", true) || {}).repeat;
  if (repeat===undefined) repeat=4; // repeat may be zero
  if (repeat) {
    exports.buzzTimeout = setTimeout(()=>require("buzz").pattern(pattern), repeat*1000);
    var vibrateTimeout = (require('Storage').readJSON("messages.settings.json", true) || {}).vibrateTimeout;
    if (vibrateTimeout===undefined) vibrateTimeout=60;
    if (vibrateTimeout && !exports.stopTimeout) exports.stopTimeout = setTimeout(exports.stopTimeout, vibrateTimeout*1000);
  }
  return require("buzz").pattern(pattern);
};
/**
 * Stop buzzing
 */
exports.stopBuzz = function() {
  if (exports.buzzTimeout) clearTimeout(exports.buzzTimeout);
  delete exports.buzzTimeout;
  if (exports.stopTimeout) clearTimeout(exports.stopTimeout);
  delete exports.stopTimeout;
};

exports.getMessageImage = function(msg) {
  /*
  * icons should be 24x24px or less with 1bpp colors and 'Transparency to Color'
  * http://www.espruino.com/Image+Converter
  */
  if (msg.img) return atob(msg.img);
  const s = (("string"=== typeof msg) ? msg : (msg.src || "")).toLowerCase();
  if (s=="airbnb") return atob("GBgBAAAAAAAAAAAAADwAAH4AAGYAAMMAAIEAAYGAAYGAAzzAA2bABmZgBmZgDGYwDDwwCDwQCBgQDDwwB+fgA8PAAAAAAAAAAAAA");
  if (s=="alarm" || s =="alarmclockreceiver") return atob("GBjBAP////8AAAAAAAACAEAHAOAefng5/5wTgcgHAOAOGHAMGDAYGBgYGBgYGBgYGBgYDhgYBxgMATAOAHAHAOADgcAB/4AAfgAAAAAAAAA=");
  if (s=="bibel") return atob("GBgBAAAAA//wD//4D//4H//4H/f4H/f4H+P4H4D4H4D4H/f4H/f4H/f4H/f4H/f4H//4H//4H//4GAAAEAAAEAAACAAAB//4AAAA");
  if (s=="bring") return atob("GBgBAAAAAAAAAAAAAAAAAHwAAFoAAf+AA/+AA/+AA/+AA/eAA+eAA0+AAx+AA7+AA/+AA//AA/+AAf8AAAIAAAAAAAAAAAAAAAAA");
  if (s=="calendar" || s=="etar") return atob("GBiBAAAAAAAAAAAAAA//8B//+BgAGBgAGBgAGB//+B//+B//+B9m2B//+B//+Btm2B//+B//+Btm+B//+B//+A//8AAAAAAAAAAAAA==");
  if (s=="corona-warn") return atob("GBgBAAAAABwAAP+AAf/gA//wB/PwD/PgDzvAHzuAP8EAP8AAPAAAPMAAP8AAH8AAHzsADzuAB/PAB/PgA//wAP/gAH+AAAwAAAAA");
  if (s=="discord") return atob("GBgBAAAAAAAAAAAAAIEABwDgDP8wH//4H//4P//8P//8P//8Pjx8fhh+fzz+f//+f//+e//ePH48HwD4AgBAAAAAAAAAAAAAAAAA");
  if (s=="facebook" || s=="messenger") return atob("GBiBAAAAAAAAAAAYAAD/AAP/wAf/4A/48A/g8B/g+B/j+B/n+D/n/D8A/B8A+B+B+B/n+A/n8A/n8Afn4APnwADnAAAAAAAAAAAAAA==");
  if (s=="gmx") return atob("GBgBAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHEJmfmd8Zuc85v847/88Z9s8fttmHIHiAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA");
  if (s=="google") return atob("GBiBAAAAAAD/AAP/wAf/4A/D4B8AwDwAADwAAHgAAHgAAHAAAHAH/nAH/nAH/ngH/ngAHjwAPDwAfB8A+A/D8Af/4AP/wAD/AAAAAA==");
  if (s=="google home") return atob("GBiCAAAAAAAAAAAAAAAAAAAAAoAAAAAACqAAAAAAKqwAAAAAqroAAAACquqAAAAKq+qgAAAqr/qoAACqv/6qAAKq//+qgA6r///qsAqr///6sAqv///6sAqv///6sAqv///6sA6v///6sA6v///qsA6qqqqqsA6qqqqqsA6qqqqqsAP7///vwAAAAAAAAAAAAAAAAA=="); // 2 bit unpaletted
  if (s=="home assistant") return atob("FhaBAAAAAADAAAeAAD8AAf4AD/3AfP8D7fwft/D/P8ec572zbzbNsOEhw+AfD8D8P4fw/z/D/P8P8/w/z/AAAAA=");
  if (s=="instagram") return atob("GBiBAAAAAAAAAAAAAAAAAAP/wAYAYAwAMAgAkAh+EAjDEAiBEAiBEAiBEAiBEAjDEAh+EAgAEAwAMAYAYAP/wAAAAAAAAAAAAAAAAA==");
  if (s=="kalender") return atob("GBgBBgBgBQCgff++RQCiRgBiQAACf//+QAACQAACR//iRJkiRIEiR//iRNsiRIEiRJkiR//iRIEiRIEiR//iQAACQAACf//+AAAA");
  if (s=="lieferando") return atob("GBgBABgAAH5wAP9wAf/4A//4B//4D//4H//4P/88fV8+fV4//V4//Vw/HVw4HVw4HBg4HBg4HBg4HDg4Hjw4Hj84Hj44Hj44Hj44");
  if (s=="mattermost") return atob("GBgBAAAAAPAAA+EAB4MADgcYHAcYOA8MOB8OeD8GcD8GcH8GcD8HcD8HeBwHeAAOfAAOfgAePwA8P8D8H//4D//wB//gAf/AAH4A");
  if (s=="n26") return atob("GBgBAAAAAAAAAAAAAAAAAP8AAAAAAAAAAAAAAOIAAOIAAPIAANoAANoAAM4AAMYAAMYAAAAAAAAAAAAAAP8AAAAAAAAAAAAAAAAA");
  if (s=="nextbike") return atob("GBgBAAAAAAAAAAAAAAAAAAAAAACAfgDAPwDAP4HAH4N4H8f8D82GMd8CMDsDMGMDMGGGGMHOD4D8AAAAAAAAAAAAAAAAAAAAAAAA");
  if (s=="nina") return atob("GBgBAAAABAAQCAAICAAIEAAEEgAkJAgSJBwSKRxKSj4pUn8lVP+VVP+VUgAlSgApKQBKJAASJAASEgAkEAAECAAICAAIBAAQAAAA");
  if (s=="outlook mail") return atob("HBwBAAAAAAAAAAAIAAAfwAAP/gAB/+AAP/5/A//v/D/+/8P/7/g+Pv8Dye/gPd74w5znHDnOB8Oc4Pw8nv/Dwe/8Pj7/w//v/D/+/8P/7/gf/gAA/+AAAfwAAACAAAAAAAAAAAA=");
  if (s=="paypal") return atob("GBgBAAAAAAAAAAAAAf+AAf/AAf/gA//gA//gA//wA//wA//wA//wB//wB//wB//gB/+AB/gAB/gAB/gAAPgAAPgAAAAAAAAAAAAA");
  if (s=="phone") return atob("FxeBABgAAPgAAfAAB/AAD+AAH+AAP8AAP4AAfgAA/AAA+AAA+AAA+AAB+AAB+AAB+OAB//AB//gB//gA//AA/8AAf4AAPAA=");
  if (s=="post & dhl") return atob("GBgBAPgAE/5wMwZ8NgN8NgP4NgP4HgP4HgPwDwfgD//AB/+AAf8AAAAABs7AHcdgG4MwAAAAGESAFESAEkSAEnyAEkSAFESAGETw");
  if (s=="signal") return atob("GBgBAAAAAGwAAQGAAhggCP8QE//AB//oJ//kL//wD//0D//wT//wD//wL//0J//kB//oA//ICf8ABfxgBYBAADoABMAABAAAAAAA");
  if (s=="skype") return atob("GhoBB8AAB//AA//+Af//wH//+D///w/8D+P8Afz/DD8/j4/H4fP5/A/+f4B/n/gP5//B+fj8fj4/H8+DB/PwA/x/A/8P///B///gP//4B//8AD/+AAA+AA==");
  if (s=="slack") return atob("GBiBAAAAAAAAAABAAAHvAAHvAADvAAAPAB/PMB/veD/veB/mcAAAABzH8B3v+B3v+B3n8AHgAAHuAAHvAAHvAADGAAAAAAAAAAAAAA==");
  if (s=="snapchat") return atob("GBgBAAAAAAAAAH4AAf+AAf+AA//AA//AA//AA//AA//AH//4D//wB//gA//AB//gD//wH//4f//+P//8D//wAf+AAH4AAAAAAAAA");
  if (s=="steam") return atob("GBgBAAAAAAAAAAAAAAAAAAAAAAfgAAwwAAvQABvQABvQADvQgDww4H/g+f8A/zwAf9gAH9AAB8AAACAAAcAAAAAAAAAAAAAAAAAA");
  if (s=="teams") return atob("GBgBAAAAAAAAAAQAAB4AAD8IAA8cP/M+f/scf/gIeDgAfvvefvvffvvffvvffvvff/vff/veP/PeAA/cAH/AAD+AAD8AAAQAAAAA");
  if (s=="telegram" || s=="telegram foss") return atob("GBiBAAAAAAAAAAAAAAAAAwAAHwAA/wAD/wAf3gD/Pgf+fh/4/v/z/P/H/D8P/Acf/AM//AF/+AF/+AH/+ADz+ADh+ADAcAAAMAAAAA==");
  if (s=="threema") return atob("GBjB/4Yx//8AAAAAAAAAAAAAfgAB/4AD/8AH/+AH/+AP//AP2/APw/APw/AHw+AH/+AH/8AH/4AH/gAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=");
  if (s=="to do" || s=="opentasks") return atob("GBgBAAAAAAAAAAAwAAB4AAD8AAH+AAP/DAf/Hg//Px/+f7/8///4///wf//gP//AH/+AD/8AB/4AA/wAAfgAAPAAAGAAAAAAAAAA");
  if (s=="twitch") return atob("GBgBH//+P//+P//+eAAGeAAGeAAGeDGGeDOGeDOGeDOGeDOGeDOGeDOGeAAOeAAOeAAcf4/4f5/wf7/gf//Af/+AA/AAA+AAAcAA");
  if (s=="twitter") return atob("GhYBAABgAAB+JgA/8cAf/ngH/5+B/8P8f+D///h///4f//+D///g///wD//8B//+AP//gD//wAP/8AB/+AB/+AH//AAf/AAAYAAA");
  if (s=="warnapp") return atob("GBgBAAAAAAAAAAAAAH4AAP8AA//AA//AD//gP//gf//4f//+/+P+/8H//8n//4n/fxh/fzg+Pj88Dn44AA4AAAwAAAwAAAgAAAAA");
  if (s=="whatsapp") return atob("GBiBAAB+AAP/wAf/4A//8B//+D///H9//n5//nw//vw///x///5///4///8e//+EP3/APn/wPn/+/j///H//+H//8H//4H//wMB+AA==");
  if (s=="wordfeud") return atob("GBgCWqqqqqqlf//////9v//////+v/////++v/////++v8///Lu+v8///L++v8///P/+v8v//P/+v9v//P/+v+fx/P/+v+Pk+P/+v/PN+f/+v/POuv/+v/Ofdv/+v/NvM//+v/I/Y//+v/k/k//+v/i/w//+v/7/6//+v//////+v//////+f//////9Wqqqqqql");
  if (s=="youtube" || s=="newpipe") return atob("GBgBAAAAAAAAAAAAAAAAAf8AH//4P//4P//8P//8P5/8P4/8f4P8f4P8P4/8P5/8P//8P//8P//4H//4Af8AAAAAAAAAAAAAAAAA");
  if (msg.id=="music") return atob("FhaBAH//+/////////////h/+AH/4Af/gB/+H3/7/f/v9/+/3/7+f/vB/w8H+Dwf4PD/x/////////////3//+A=");
  // if (s=="sms message" || s=="mail" || s=="gmail") // .. default icon (below)
  return atob("FhKBAH//+P//yf/+c//z5/+fz/z/n+f/Pz/+ef/8D///////////////////////f//4///A");
};

exports.getMessageImageCol = function(msg,def) {
  let iconColorMode = (require('Storage').readJSON("messages.settings.json", 1) || {}).iconColorMode;
  if (iconColorMode == 'mono')
    return g.theme.fg;
  const s = (("string"=== typeof msg) ? msg : (msg.src || "")).toLowerCase();
  return {
    // generic colors, using B2-safe colors
    // DO NOT USE BLACK OR WHITE HERE, just leave the declaration out and then the theme's fg color will be used
    "airbnb": "#f00",
    "mail": "#ff0",
    "music": "#f0f",
    "phone": "#0f0",
    "sms message": "#0ff",
    // brands, according to https://www.schemecolor.com/?s (picking one for multicolored logos)
    // all dithered on B2, but we only use the color for the icons.  (Could maybe pick the closest 3-bit color for B2?)
    "bibel": "#54342c",
    "bring": "#455a64",
    "discord": "#738adb",
    "etar": "#36a18b",
    "facebook": "#4267b2",
    "gmail": "#ea4335",
    "gmx": "#1c449b",
    "google": "#4285F4",
    "google home": "#fbbc05",
// "home assistant": "#41bdf5", // ha-blue is #41bdf5, but that's the background
    "instagram": "#dd2a7b",
    "lieferando": "#ee5c00",
    "messenger": "#0078ff",
    "mattermost": "#00f",
    "n26": "#36a18b",
    "nextbike": "#00f",
    "newpipe": "#f00",
    "nina": "#e57004",
    "opentasks": "#409f8f",
    "outlook mail": "#0072c6",
    "paypal": "#003087",
    "post & dhl": "#f2c101",
    "signal": "#00f",
    "skype": "#00aff0",
    "slack": "#e51670",
    "snapchat": "#ff0",
    "steam": "#171a21",
    "teams": "#464eb8",
    "telegram": "#0088cc",
    "telegram foss": "#0088cc",
    "to do": "#3999e5",
    "twitch": "#6441A4",
    "twitter": "#1da1f2",
    "whatsapp": "#4fce5d",
    "wordfeud": "#e7d3c7",
    "youtube": "#f00",
  }[s]||(def !== undefined?def:g.theme.fg);
};