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