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