Remove separate mime for video call messages.

src/constants.js

@@ -4,8 +4,5 @@ export const CALL_STATE_OUTGOING_INITATED = 1;
 export const CALL_STATE_INCOMING_RECEIVED = 2;
 export const CALL_STATE_IN_PROGRESS = 3;
 
-// Mime type used for video call messages.
-export const CALL_MESSAGE_MIME_TYPE = 'application/x-tinode-webrtc';
-
 // Video call drafty headers representing call state.
 export const CALL_HEAD_STARTED = 'started';

src/lib/utils.js

@@ -2,8 +2,6 @@
 
 import { Tinode } from 'tinode-sdk';
 
-import { CALL_MESSAGE_MIME_TYPE } from '../constants.js'
-
 // Make shortcut icon appear with a green dot + show unread count in title.
 export function updateFavicon(count) {
   const oldIcon = document.getElementById('shortcut-icon');
@@ -208,11 +206,6 @@ export function cancelablePromise(promise) {
   };
 };
 
-// Returns true if specified mime type represents a Tinode video call.
-export function isVideoCall(mime) {
-  return mime == CALL_MESSAGE_MIME_TYPE;
-}
-
 // Clips string to the specified length.
 export function clipStr(str, length) {
   return str && str.substring(0, length);

src/views/tinode-web.jsx

@@ -21,7 +21,7 @@ import { API_KEY, APP_NAME, DEFAULT_P2P_ACCESS_MODE, FORWARDED_PREVIEW_LENGTH, L
   MEDIA_BREAKPOINT, RECEIVED_DELAY } from '../config.js';
 import { CALL_STATE_NONE, CALL_STATE_OUTGOING_INITATED,
          CALL_STATE_INCOMING_RECEIVED, CALL_STATE_IN_PROGRESS,
-         CALL_MESSAGE_MIME_TYPE, CALL_HEAD_STARTED }  from '../constants.js';
+         CALL_HEAD_STARTED }  from '../constants.js';
 import { PACKAGE_VERSION } from '../version.js';
 import { base64ReEncode, makeImageUrl } from '../lib/blob-helpers.js';
 import { detectServerAddress, isLocalHost, isSecureConnection } from '../lib/host-name.js';
@@ -1687,10 +1687,7 @@ class TinodeWeb extends React.Component {
   handleCallInvite(callTopic, callSeq, callState) {
     switch (callState) {
       case CALL_STATE_OUTGOING_INITATED:
-        let head = {
-          mime: CALL_MESSAGE_MIME_TYPE,
-          webrtc: CALL_HEAD_STARTED
-        };
+        let head = { webrtc: CALL_HEAD_STARTED };
         this.handleSendMessage(Drafty.videoCall(), undefined, undefined, head)
           .then((ctrl) => {
             if (ctrl.code < 200 || ctrl.code >= 300 || !ctrl.params || !ctrl.params.seq) {

src/widgets/chat-message.jsx

@@ -8,7 +8,6 @@ import Attachment from './attachment.jsx';
 import LetterTile from './letter-tile.jsx';
 import ReceivedMarker from './received-marker.jsx'
 
-import { CALL_MESSAGE_MIME_TYPE } from '../constants.js'
 import { fullFormatter } from '../lib/formatters.js';
 import { isVideoCall, sanitizeUrl } from '../lib/utils.js';
 
@@ -126,7 +125,7 @@ class BaseChatMessage extends React.PureComponent {
 
     let content = this.props.content;
     const attachments = [];
-    if ([Drafty.getContentType(), CALL_MESSAGE_MIME_TYPE].includes(this.props.mimeType) && Drafty.isValid(content)) {
+    if (this.props.mimeType == Drafty.getContentType() && Drafty.isValid(content)) {
       Drafty.attachments(content, (att, i) => {
         if (att.mime == 'application/json') {
           // Don't show json objects as attachments.

src/widgets/contact-list.jsx

@@ -9,7 +9,6 @@ import Contact from './contact.jsx';
 import ContactAction from './contact-action.jsx';
 
 import { makeImageUrl } from '../lib/blob-helpers.js';
-import { isVideoCall } from '../lib/utils.js'
 
 import { MESSAGE_PREVIEW_LENGTH } from '../config.js';
 
@@ -86,7 +85,7 @@ class ContactList extends React.Component {
             if (msg) {
               forwarded = msg.head ? msg.head.forwarded : null;
               deliveryStatus = msg._status || c.msgStatus(msg, true);
-              previewIsVideoCall = msg.head ? isVideoCall(msg.head.mime) : null;
+              previewIsVideoCall = msg.head ? (msg.head.webrtc !== undefined) : null;
               previewIsResponse = msg.from != this.props.myUserId;
               if (msg.content) {
                 preview = typeof msg.content == 'string' ?