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