webcit-ng/static/js/view_mail.js

   1 // This module handles the view for "mailbox" rooms.
   2 //
   3 // Copyright (c) 2016-2023 by the citadel.org team
   4 //
   5 // This program is open source software.  Use, duplication, or
   6 // disclosure are subject to the GNU General Public License v3.
   7
   8
   9 var displayed_message = 0;                                                      // ID of message currently being displayed
  10 var RefreshMailboxInterval;                                                     // We store our refresh timer here
  11 var highest_mailnum;                                                            // This is used to detect newly arrived mail
  12 var newmail_notify = {
  13         NO  : 0,                                                                // do not perform new mail notifications
  14         YES : 1                                                                 // yes, perform new mail notifications
  15 };
  16
  17
  18 // This is the async back end for mail_delete_selected()
  19 mail_delete_func = async(table, row) => {
  20         let m = parseInt(row["id"].substring(12));                              // derive msgnum from row id
  21
  22         if (is_trash_folder) {
  23                 response = await fetch(
  24                         "/ctdl/r/" + escapeHTMLURI(current_room) + "/" + m,
  25                         {
  26                                 method: "DELETE"                                // If this is the Trash folder, delete permanently
  27                         },
  28                 );
  29         }
  30         else {
  31                 response = await fetch(
  32                         "/ctdl/r/" + escapeHTMLURI(current_room) + "/" + m,
  33                         {
  34                                 method: "MOVE",                                 // Otherwise, move to the Trash folder
  35                                 headers: { "Destination" : "/ctdl/r/_TRASH_" }
  36                         },
  37                 );
  38         }
  39
  40         if (response.ok) {                              // If the server accepted the delete, blank out the message div
  41                 table.deleteRow(row.rowIndex);
  42                 if (m == displayed_message) {
  43                         document.getElementById("ctdl-mailbox-reading-pane").innerHTML = "";
  44                         displayed_message = 0;
  45                 }
  46         }
  47 }
  48
  49
  50 // Delete the selected messages (can be activated by mouse click or keypress)
  51 function mail_delete_selected() {
  52         var table = document.getElementById("ctdl-onscreen-mailbox");
  53         var i, row;
  54         for (i=0; row=table.rows[i]; ++i) {
  55                 if (row.classList.contains("ctdl-mail-selected")) {
  56                         mail_delete_func(table, row);
  57                 }
  58         }
  59 }
  60
  61
  62 // Handler function for keypresses detected while the mail view is displayed.  Mainly for deleting messages.
  63 function mail_keypress(event) {
  64
  65         // If the "ctdl-mailbox-pane" no longer exists, the user has navigated to a different part of the site,
  66         // so cancel the event listener.
  67         try {
  68                 document.getElementById("ctdl-mailbox-pane").innerHTML;
  69         }
  70         catch {
  71                 document.removeEventListener("keydown", mail_keypress);
  72                 return;
  73         }
  74
  75         const key = event.key.toLowerCase();
  76         if (key == "delete") {
  77                 mail_delete_selected();
  78         }
  79
  80 }
  81
  82
  83 // Handler function for dragging email messages to other folders
  84 function mail_dragstart(event) {
  85         var i;
  86         var count = 0;
  87         var table = document.getElementById("ctdl-onscreen-mailbox");
  88
  89         // Figure out how many messages are being dragged
  90         for (i=1; row=table.rows[i]; ++i) {
  91                 if (row.classList.contains("ctdl-mail-selected")) {
  92                         count = count + 1;
  93                 }
  94         }
  95
  96         // Set the custom drag image to an envelope + number of messages being dragged
  97         d = document.getElementById("ctdl_draggo");
  98         d.innerHTML = "<font size='+3'><i class='fa fa-envelope' style='color: red'></i> " + count + "</font>"
  99         event.dataTransfer.setDragImage(d, 0, 0);
 100         event.dataTransfer.setData("text/html", "blah blah blah");
 101         console.log("source dragstart");
 102 }
 103
 104
 105 // Handler function for dragging email messages to other folders
 106 function mail_dragend(event) {
 107         console.log("source dragend");
 108 }
 109
 110
 111 // Render reply address for a message (FIXME figure out how to deal with "reply-to:")
 112 function reply_addr(msg) {
 113         //if (msg.locl) {
 114                 //return([msg.from]);
 115         //}
 116         //else {
 117                 return([msg.from + " &lt;" + msg.rfca + "&gt;"]);
 118         //}
 119 }
 120
 121
 122 // Render the To: recipients for a reply-all operation
 123 function replyall_to(msg) {
 124         return([...reply_addr(msg), ...msg.rcpt]);
 125 }
 126
 127
 128 // Render a message into the mailbox view
 129 // (We want the message number and the message itself because we need to keep the msgnum for reply purposes)
 130 function mail_render_one(msgnum, msg, target_div, include_controls) {
 131         let div = "";
 132         try {
 133                 outmsg =
 134                   "<div class=\"ctdl-mmsg-wrapper\">"                           // begin message wrapper
 135                 ;
 136
 137                 if (include_controls) {                                         // omit controls if this is a pull quote
 138                         outmsg +=
 139                           render_userpic(msg.from)                              // user avatar
 140                         + "<div class=\"ctdl-mmsg-content\">"                   // begin content
 141                         + "<div class=\"ctdl-msg-header\">"                     // begin header
 142                         + "<span class=\"ctdl-msg-header-info\">"               // begin header info on left side
 143                         + render_msg_author(msg, views.VIEW_MAILBOX)
 144                         + "<span class=\"ctdl-msgdate\">"
 145                         + string_timestamp(msg.time,0)
 146                         + "</span>"                                             // end msgdate
 147                         + "</span>"                                             // end header info on left side
 148                         + "<span class=\"ctdl-msg-header-buttons\">"            // begin buttons on right side
 149
 150                         + "<span class=\"ctdl-msg-button\">"                    // Reply (mail is always Quoted)
 151                         + "<a href=\"javascript:mail_compose(true,'"+msg.wefw+"','"+msgnum+"', reply_addr(msg), [], 'Re: '+msg.subj);\">"
 152                         + "<i class=\"fa fa-reply\"></i> "
 153                         + _("Reply")
 154                         + "</a></span>"
 155
 156                         + "<span class=\"ctdl-msg-button\">"                    // Reply-All (mail is always Quoted)
 157                         + "<a href=\"javascript:mail_compose(true,'"+msg.wefw+"','"+msgnum+"', replyall_to(msg), msg.cccc, 'Re: '+msg.subj);\">"
 158                         + "<i class=\"fa fa-reply-all\"></i> "
 159                         + _("ReplyAll")
 160                         + "</a></span>";
 161
 162                         if (can_delete_messages) {
 163                                 outmsg +=
 164                                 "<span class=\"ctdl-msg-button\">"
 165                                 + "<a href=\"javascript:forum_delete_message('"+div+"','"+msg.msgnum+"');\">"
 166                                 + "<i class=\"fa fa-trash\"></i> "
 167                                 + _("Delete")
 168                                 + "</a></span>";
 169                         }
 170
 171                         outmsg +=
 172                           "</span>";                                            // end buttons on right side
 173
 174                         // Display the To: recipients, if any are present
 175                         if (msg.rcpt) {
 176                                 outmsg += "<br><span>" + _("To:") + " ";
 177                                 for (var r=0; r<msg.rcpt.length; ++r) {
 178                                         if (r != 0) {
 179                                                 outmsg += ", ";
 180                                         }
 181                                         outmsg += escapeHTML(msg.rcpt[r]);
 182                                 }
 183                                 outmsg += "</span>";
 184                         }
 185
 186                         // Display the Cc: recipients, if any are present
 187                         if (msg.cccc) {
 188                                 outmsg += "<br><span>" + _("Cc:") + " ";
 189                                 for (var r=0; r<msg.cccc.length; ++r) {
 190                                         if (r != 0) {
 191                                                 outmsg += ", ";
 192                                         }
 193                                         outmsg += escapeHTML(msg.cccc[r]);
 194                                 }
 195                                 outmsg += "</span>";
 196                         }
 197
 198                         // Display a subject line, but only if the message has a subject (internal Citadel messages often don't)
 199                         if (msg.subj) {
 200                                 outmsg +=
 201                                 "<br><span class=\"ctdl-msgsubject\">" + msg.subj + "</span>";
 202                         }
 203
 204                         outmsg +=
 205                           "</div>";                                             // end header
 206                 }
 207
 208                 outmsg +=
 209                   "<div class=\"ctdl-msg-body\" id=\"" + div + "_body\">"       // begin body
 210                 + msg.text
 211                 + "</div>"                                                      // end body
 212                 + "</div>"                                                      // end content
 213                 + "</div>"                                                      // end wrapper
 214                 ;
 215         }
 216         catch(err) {
 217                 outmsg = "<div class=\"ctdl-mmsg-wrapper\">" + err.message + "</div>";
 218         }
 219
 220         target_div.innerHTML = outmsg;
 221 }
 222
 223
 224 // display an individual message (note: this wants an actual div object, not a string containing the name of a div)
 225 function mail_display_message(msgnum, target_div, include_controls) {
 226         url = "/ctdl/r/" + escapeHTMLURI(current_room) + "/" + msgnum + "/json";
 227         mail_fetch_msg = async() => {
 228                 response = await fetch(url);
 229                 msg = await(response.json());
 230                 if (response.ok) {
 231                         mail_render_one(msgnum, msg, target_div, include_controls);
 232                 }
 233         }
 234         mail_fetch_msg();
 235 }
 236
 237
 238 // after a message is selected or deselected, we call this to set or clear the drag handler.
 239 function enable_or_disable_draggable(row) {
 240         if (row.classList.contains("ctdl-mail-selected")) {
 241                 row.draggable = "true"
 242                 row.addEventListener("dragstart", mail_dragstart);
 243                 row.addEventListener("dragend", mail_dragend);
 244         }
 245         else {
 246                 row.draggable = "false"
 247                 row.removeEventListener("dragstart", mail_dragstart);
 248                 row.removeEventListener("dragend", mail_dragend);
 249         }
 250 }
 251
 252
 253
 254 // A message has been selected...
 255 function click_message(event, msgnum) {
 256         var table = document.getElementById("ctdl-onscreen-mailbox");
 257         var i, m, row;
 258
 259         // ctrl + click = toggle an individual message without changing existing selection
 260         if (event.ctrlKey) {
 261                 document.getElementById("ctdl-msgsum-" + msgnum).classList.toggle("ctdl-mail-selected");
 262                 enable_or_disable_draggable(document.getElementById("ctdl-msgsum-" + msgnum));
 263         }
 264
 265         // shift + click = select a range of messages (start with row 1 because row 0 is the header)
 266         else if (event.shiftKey) {
 267                 for (i=1; row=table.rows[i]; ++i) {
 268                         m = parseInt(row["id"].substring(12));                          // derive msgnum from row id
 269                         if (
 270                                 ((msgnum >= displayed_message) && (m >= displayed_message) && (m <= msgnum))
 271                                 || ((msgnum <= displayed_message) && (m <= displayed_message) && (m >= msgnum))
 272                         ) {
 273                                 row.classList.add("ctdl-mail-selected");
 274                         }
 275                         else {
 276                                 row.classList.remove("ctdl-mail-selected");
 277                         }
 278                         enable_or_disable_draggable(row);
 279                 }
 280         }
 281
 282         // click + no modifiers = select one message and unselect all others (start with row 1 because row 0 is the header)
 283         else {
 284                 for (i=1; row=table.rows[i]; ++i) {
 285                         if (row["id"] == "ctdl-msgsum-" + msgnum) {
 286                                 row.classList.add("ctdl-mail-selected");
 287                         }
 288                         else {
 289                                 row.classList.remove("ctdl-mail-selected");
 290                         }
 291                         enable_or_disable_draggable(row);
 292                 }
 293         }
 294
 295         // display the message if it isn't already displayed
 296         if (displayed_message != msgnum) {
 297                 displayed_message = msgnum;
 298                 mail_display_message(msgnum, document.getElementById("ctdl-mailbox-reading-pane"), 1);
 299         }
 300 }
 301
 302
 303 // render one row in the mailbox table (this could be called from one of several places)
 304 function mail_render_row(msg, is_selected) {
 305         row     = "<tr "
 306                 + "id=\"ctdl-msgsum-" + msg["msgnum"] + "\" "
 307                 + (is_selected ? "class=\"ctdl-mail-selected\" " : "")
 308                 + "onClick=\"click_message(event," + msg["msgnum"] + ");\""
 309                 + "onselectstart=\"return false;\""
 310                 + ">"
 311                 + "<td class=\"ctdl-mail-subject\">" + msg["subject"] + "</td>"
 312                 + "<td class=\"ctdl-mail-sender\">" + msg["author"] + "</td>"
 313                 + "<td class=\"ctdl-mail-date\">" + string_timestamp(msg["time"],1) + "</td>"
 314                 + "<td class=\"ctdl-mail-msgnum\">" + msg["msgnum"] + "</td>"
 315                 + "</tr>";
 316         return(row);
 317 }
 318
 319
 320 // RENDERER FOR THIS VIEW
 321 function view_render_mail() {
 322         // Put the "enter new message" button into the topbar
 323         document.getElementById("ctdl-newmsg-button").innerHTML = "<i class=\"fa fa-edit\"></i>" + _("Write mail");
 324         document.getElementById("ctdl-newmsg-button").style.display = "block";
 325
 326         // Put the "delete message(s)" button into the topbar
 327         let d = document.getElementById("ctdl-delete-button");
 328         d.innerHTML = "<i class=\"fa fa-trash\"></i>" + _("Delete");
 329         d.style.display = "block";
 330         //d.addEventListener("click", mail_delete_selected);
 331
 332         document.getElementById("ctdl-main").innerHTML
 333                 = "<div id=\"ctdl-mailbox-grid-container\" class=\"ctdl-mailbox-grid-container\">"
 334                 + "<div id=\"ctdl-mailbox-pane\" class=\"ctdl-mailbox-pane\"></div>"
 335                 + "<div id=\"ctdl-mailbox-reading-pane\" class=\"ctdl-mailbox-reading-pane\"></div>"
 336                 + "</div>"
 337         ;
 338
 339         highest_mailnum = 0;                                    // Keep track of highest message number to track newly arrived messages
 340         render_mailbox_display(newmail_notify.NO);
 341         try {                                                   // if this was already set up, clear it so there aren't multiple
 342                 clearInterval(RefreshMailboxInterval);
 343         }
 344         catch {
 345         }
 346         RefreshMailboxInterval = setInterval(refresh_mail_display, 10000);
 347 }
 348
 349
 350 // Refresh the mailbox, either for the first time or whenever needed
 351 function refresh_mail_display() {
 352         // If the "ctdl-mailbox-pane" no longer exists, the user has navigated to a different part of the site,
 353         // so cancel the refresh.
 354         try {
 355                 document.getElementById("ctdl-mailbox-pane").innerHTML;
 356         }
 357         catch {
 358                 clearInterval(RefreshMailboxInterval);
 359                 return;
 360         }
 361
 362         // Ask the server if the room has been written to since our last look at it.
 363         url = "/ctdl/r/" + escapeHTMLURI(current_room) + "/stat";
 364         fetch_stat = async() => {
 365                 response = await fetch(url);
 366                 stat = await(response.json());
 367                 if (stat.room_mtime > room_mtime) {                     // FIXME commented out to force refreshes
 368                         room_mtime = stat.room_mtime;
 369                         render_mailbox_display(newmail_notify.YES);
 370                 }
 371         }
 372         fetch_stat();
 373 }
 374
 375
 376 // This is where the rendering of the message list in the mailbox view is performed.
 377 // Set notify to newmail_notify.NO or newmail_notify.YES depending on whether we are interested in the arrival of new messages.
 378 function render_mailbox_display(notify) {
 379
 380         url = "/ctdl/r/" + escapeHTMLURI(current_room) + "/mailbox";
 381         fetch_mailbox = async() => {
 382                 response = await fetch(url);
 383                 msgs = await(response.json());
 384                 if (response.ok) {
 385                         var previously_selected = [];
 386                         var oldtable = document.getElementById("ctdl-onscreen-mailbox");
 387                         var i, row;
 388
 389                         // If one or more messages was already selected, remember them so we can re-select them
 390                         if ( (displayed_message > 0) && (oldtable) ) {
 391                                 for (i=0; row=oldtable.rows[i]; ++i) {
 392                                         if (row.classList.contains("ctdl-mail-selected")) {
 393                                                 previously_selected.push(parseInt(row["id"].substring(12)));
 394                                         }
 395                                 }
 396                         }
 397
 398                         // begin rendering the mailbox table
 399                         box =   "<table id=\"ctdl-onscreen-mailbox\" class=\"ctdl-mailbox-table\" width=100%><tr>"
 400                                 + "<th>" + _("Subject") + "</th>"
 401                                 + "<th>" + _("Sender") + "</th>"
 402                                 + "<th>" + _("Date") + "</th>"
 403                                 + "<th>#</th>"
 404                                 + "</tr>";
 405
 406                         for (let i=0; i<msgs.length; ++i) {
 407                                 let m = parseInt(msgs[i].msgnum);
 408                                 let s = (previously_selected.includes(m));
 409                                 box += mail_render_row(msgs[i], s);
 410                                 if (m > highest_mailnum) {
 411                                         highest_mailnum = m;
 412                                 }
 413                         }
 414
 415                         box +=  "</table>";
 416                         document.getElementById("ctdl-mailbox-pane").innerHTML = box;
 417                         document.addEventListener("keydown", mail_keypress);
 418                 }
 419         }
 420         fetch_mailbox();
 421 }
 422
 423
 424 // Compose a new mail message (called by the Reply button here, or by the dispatcher in views.js)
 425 function mail_compose(is_quoted, references, quoted_msgnum, m_to, m_cc, m_subject) {
 426         // m_to will be an array of zero or more recipients for the To: field.  Convert it to a string.
 427         if (m_to) {
 428                 m_to = Array.from(new Set(m_to));       // remove dupes
 429                 m_to_str = "";
 430                 for (i=0; i<m_to.length; ++i) {
 431                         if (i > 0) {
 432                                 m_to_str += ", ";
 433                         }
 434                         m_to_str += m_to[i].replaceAll("<", "&lt;").replaceAll(">", "&gt;");
 435                 }
 436         }
 437         else {
 438                 m_to_str = "";
 439         }
 440
 441         // m_to will be an array of zero or more recipients for the Cc: field.  Convert it to a string.
 442         if (m_cc) {
 443                 m_cc = Array.from(new Set(m_cc));       // remove dupes
 444                 m_cc_str = "";
 445                 for (i=0; i<m_cc.length; ++i) {
 446                         if (i > 0) {
 447                                 m_cc_str += ", ";
 448                         }
 449                         m_cc_str += m_cc[i].replaceAll("<", "&lt;").replaceAll(">", "&gt;");
 450                 }
 451         }
 452         else {
 453                 m_cc_str = "";
 454         }
 455
 456         quoted_div_name = randomString();
 457
 458         // Make the "Write mail" button disappear.  We're already there!
 459         document.getElementById("ctdl-newmsg-button").style.display = "none";
 460
 461         // is_quoted    true or false depending on whether the user selected "reply quoted" (is this appropriate for mail?)
 462         // references   list of references, be sure to use this in a reply
 463         // msgid        if a reply, the msgid of the most recent message in the chain, the one to which we are replying
 464
 465         // Now display the screen.
 466         compose_screen =
 467                 // Hidden values that we are storing right here in the document tree for later
 468                   "<input id=\"ctdl_mc_is_quoted\" style=\"display:none\" value=\"" + is_quoted + "\"></input>"
 469                 + "<input id=\"ctdl_mc_references\" style=\"display:none\" value=\"" + references + "\"></input>"
 470
 471                 // Header fields, the composition window, and the button bar are arranged using a Grid layout.
 472                 + "<div id=\"ctdl-compose-mail\" class=\"ctdl-compose-mail\">"
 473
 474                 // Visible To: field, plus a box to make the CC/BCC lines appear
 475                 + "<div class=\"ctdl-compose-to-label\">" + _("To:") + "</div>"
 476                 + "<div class=\"ctdl-compose-to-line\">"
 477                 + "<div class=\"ctdl-compose-to-field\" id=\"ctdl-compose-to-field\" contenteditable=\"true\">" + m_to_str + "</div>"
 478                 + "<div class=\"ctdl-cc-bcc-buttons ctdl-msg-button\" id=\"ctdl-cc-bcc-buttons\" "
 479                 + "onClick=\"make_cc_bcc_visible()\">"
 480                 + _("CC:") + "/" + _("BCC:") + "</div>"
 481                 + "</div>"
 482
 483                 // CC/BCC
 484                 + "<div class=\"ctdl-compose-cc-label\" id=\"ctdl-compose-cc-label\">" + _("CC:") + "</div>"
 485                 + "<div class=\"ctdl-compose-cc-field\" id=\"ctdl-compose-cc-field\" contenteditable=\"true\">" + m_cc_str + "</div>"
 486                 + "<div class=\"ctdl-compose-bcc-label\" id=\"ctdl-compose-bcc-label\">" + _("BCC:") + "</div>"
 487                 + "<div class=\"ctdl-compose-bcc-field\" id=\"ctdl-compose-bcc-field\" contenteditable=\"true\"></div>"
 488
 489                 // Visible subject field
 490                 + "<div class=\"ctdl-compose-subject-label\">" + _("Subject:") + "</div>"
 491                 + "<div class=\"ctdl-compose-subject-field\" id=\"ctdl-compose-subject-field\" contenteditable=\"true\">" + m_subject + "</div>"
 492
 493                 // Message composition box
 494                 + "<div class=\"ctdl-compose-message-box\" id=\"ctdl-editor-body\" contenteditable=\"true\">"
 495         ;
 496
 497         if (is_quoted) {
 498                 compose_screen += "<br><br><blockquote><div id=\"" + quoted_div_name + "\"></div></blockquote>";
 499         }
 500
 501         compose_screen +=
 502                   "</div>"
 503
 504                 // The button bar is a Grid element, and is also a Flexbox container.
 505                 + "<div class=\"ctdl-compose-toolbar\">"
 506                 + "<span class=\"ctdl-msg-button\" onclick=\"mail_send_message()\"><i class=\"fa fa-paper-plane\" style=\"color:green\"></i> " + _("Send message") + "</span>"
 507                 + "<span class=\"ctdl-msg-button\">" + _("Save to Drafts") + "</span>"
 508                 + "<span class=\"ctdl-msg-button\">" + _("Attachments:") + " 0" + "</span>"
 509                 + "<span class=\"ctdl-msg-button\">" + _("Contacts") + "</span>"
 510                 + "<span class=\"ctdl-msg-button\" onClick=\"gotoroom(current_room)\"><i class=\"fa fa-trash\" style=\"color:red\"></i> " + _("Cancel") + "</span>"
 511                 + "</div>"
 512         ;
 513
 514         document.getElementById("ctdl-main").innerHTML = compose_screen;
 515         mail_display_message(quoted_msgnum, document.getElementById(quoted_div_name), 0);
 516         if (m_cc) {
 517                 document.getElementById("ctdl-compose-cc-label").style.display = "block";
 518                 document.getElementById("ctdl-compose-cc-field").style.display = "block";
 519         }
 520 }
 521
 522
 523 // Called when the user clicks the button to make the hidden "CC" and "BCC" lines appear.
 524 // It is also called automatically during a Reply when CC is pre-populated.
 525 function make_cc_bcc_visible() {
 526         document.getElementById("ctdl-cc-bcc-buttons").style.display = "none";
 527         document.getElementById("ctdl-compose-bcc-label").style.display = "block";
 528         document.getElementById("ctdl-compose-bcc-field").style.display = "block";
 529 }
 530
 531
 532 // Helper function for mail_send_messages() to extract and decode metadata values.
 533 function msm_field(element_name, separator) {
 534         let s1 = document.getElementById(element_name).innerHTML;
 535         let s2 = s1.replaceAll("|",separator);          // Replace "|" with "!" because "|" is a field separator in Citadel
 536         let s3 = decodeURI(s2);
 537         let s4 = document.createElement("textarea");    // This One Weird Trick Unescapes All HTML Entities
 538         s4.innerHTML = s3;
 539         let s5 = s4.value;
 540         return(s5);
 541 }
 542
 543
 544 // Save the posted message to the server
 545 function mail_send_message() {
 546
 547         document.body.style.cursor = "wait";
 548         let url = "/ctdl/r/" + escapeHTMLURI(current_room)
 549                 + "/dummy_name_for_new_mail"
 550                 + "?wefw="      + msm_field("ctdl_mc_references", "!")                          // references (if present)
 551                 + "&subj="      + msm_field("ctdl-compose-subject-field", " ")                  // subject (if present)
 552                 + "&mailto="    + msm_field("ctdl-compose-to-field", ",")                       // To: (required)
 553                 + "&mailcc="    + msm_field("ctdl-compose-cc-field", ",")                       // Cc: (if present)
 554                 + "&mailbcc="   + msm_field("ctdl-compose-bcc-field", ",")                      // Bcc: (if present)
 555         ;
 556         boundary = randomString();
 557         body_text =
 558                 "--" + boundary + "\r\n"
 559                 + "Content-type: text/html\r\n"
 560                 + "Content-transfer-encoding: quoted-printable\r\n"
 561                 + "\r\n"
 562                 + quoted_printable_encode(
 563                         "<html><body>" + document.getElementById("ctdl-editor-body").innerHTML + "</body></html>"
 564                 ) + "\r\n"
 565                 + "--" + boundary + "--\r\n"
 566         ;
 567
 568         var request = new XMLHttpRequest();
 569         request.open("PUT", url, true);
 570         request.setRequestHeader("Content-type", "multipart/mixed; boundary=\"" + boundary + "\"");
 571         request.onreadystatechange = function() {
 572                 if (request.readyState == 4) {
 573                         document.body.style.cursor = "default";
 574                         if (Math.trunc(request.status / 100) == 2) {
 575                                 headers = request.getAllResponseHeaders().split("\n");
 576                                 for (var i in headers) {
 577                                         if (headers[i].startsWith("etag: ")) {
 578                                                 new_msg_num = headers[i].split(" ")[1];
 579                                         }
 580                                 }
 581
 582                                 // After saving the message, go back to the mailbox view.
 583                                 gotoroom(current_room);
 584
 585                         }
 586                         else {
 587                                 error_message = request.responseText;
 588                                 if (error_message.length == 0) {
 589                                         error_message = _("An error has occurred.");
 590                                 }
 591                                 alert(error_message);                                           // editor remains open
 592                         }
 593                 }
 594         };
 595         request.send(body_text);
 596 }