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