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         let table = document.getElementById("ctdl-onscreen-mailbox");
  53         let 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         let i;
  86         let count = 0;
  87         let table = document.getElementById("ctdl-onscreen-mailbox");
  88         let messages_being_dragged = [] ;
  89
  90         if (event.target.classList.contains("ctdl-mail-selected")) {
  91                 // The row being dragged IS selected.  See if any OTHER rows are selected, and they will come along for the ride.
  92                 for (i=1; row=table.rows[i]; ++i) {
  93                         if (row.classList.contains("ctdl-mail-selected")) {
  94                                 count = count + 1;
  95                                 messages_being_dragged.push(row.id);    // Tell the clipboard what's being moved.
  96                         }
  97                 }
  98         }
  99         else {
 100                 // The row being dragged is NOT selected.  It will be dragged on its own, ignoring the selected rows.
 101                 count = 1;
 102                 messages_being_dragged.push(event.target.id);           // Tell the clipboard what's being moved.
 103         }
 104
 105         // Set the custom drag image to an envelope + number of messages being dragged
 106         d = document.getElementById("ctdl_draggo");
 107         d.innerHTML = "<font size='+2'><i class='fa fa-envelope' style='color: red'></i> " + count + "</font>"
 108         event.dataTransfer.setDragImage(d, 0, 0);
 109         event.dataTransfer.setData("text", messages_being_dragged);
 110 }
 111
 112
 113 // Render reply address for a message (FIXME figure out how to deal with "reply-to:")
 114 function reply_addr(msg) {
 115         //if (msg.locl) {
 116                 //return([msg.from]);
 117         //}
 118         //else {
 119                 return([msg.from + " &lt;" + msg.rfca + "&gt;"]);
 120         //}
 121 }
 122
 123
 124 // Render the To: recipients for a reply-all operation
 125 function replyall_to(msg) {
 126         return([...reply_addr(msg), ...msg.rcpt]);
 127 }
 128
 129
 130 // Render a message into the mailbox view
 131 // (We want the message number and the message itself because we need to keep the msgnum for reply purposes)
 132 function mail_render_one(msgnum, msg, target_div, include_controls) {
 133         let div = "";
 134         try {
 135                 outmsg =
 136                   "<div class=\"ctdl-mmsg-wrapper\">"                           // begin message wrapper
 137                 ;
 138
 139                 if (include_controls) {                                         // omit controls if this is a pull quote
 140                         outmsg +=
 141                           render_userpic(msg.from)                              // user avatar
 142                         + "<div class=\"ctdl-mmsg-content\">"                   // begin content
 143                         + "<div class=\"ctdl-msg-header\">"                     // begin header
 144                         + "<span class=\"ctdl-msg-header-info\">"               // begin header info on left side
 145                         + render_msg_author(msg, views.VIEW_MAILBOX)
 146                         + "<span class=\"ctdl-msgdate\">"
 147                         + string_timestamp(msg.time,0)
 148                         + "</span>"                                             // end msgdate
 149                         + "</span>"                                             // end header info on left side
 150                         + "<span class=\"ctdl-msg-header-buttons\">"            // begin buttons on right side
 151
 152                         + "<span class=\"ctdl-msg-button\">"                    // Reply (mail is always Quoted)
 153                         + "<a href=\"javascript:mail_compose(true,'"+msg.wefw+"','"+msgnum+"', reply_addr(msg), [], 'Re: '+msg.subj);\">"
 154                         + "<i class=\"fa fa-reply\"></i> "
 155                         + _("Reply")
 156                         + "</a></span>"
 157
 158                         + "<span class=\"ctdl-msg-button\">"                    // Reply-All (mail is always Quoted)
 159                         + "<a href=\"javascript:mail_compose(true,'"+msg.wefw+"','"+msgnum+"', replyall_to(msg), msg.cccc, 'Re: '+msg.subj);\">"
 160                         + "<i class=\"fa fa-reply-all\"></i> "
 161                         + _("ReplyAll")
 162                         + "</a></span>";
 163
 164                         if (can_delete_messages) {
 165                                 outmsg +=
 166                                 "<span class=\"ctdl-msg-button\">"
 167                                 + "<a href=\"javascript:forum_delete_message('"+div+"','"+msg.msgnum+"');\">"
 168                                 + "<i class=\"fa fa-trash\"></i> "
 169                                 + _("Delete")
 170                                 + "</a></span>";
 171                         }
 172
 173                         outmsg +=
 174                           "</span>";                                            // end buttons on right side
 175
 176                         // Display the To: recipients, if any are present
 177                         if (msg.rcpt) {
 178                                 outmsg += "<br><span>" + _("To:") + " ";
 179                                 for (let r=0; r<msg.rcpt.length; ++r) {
 180                                         if (r != 0) {
 181                                                 outmsg += ", ";
 182                                         }
 183                                         outmsg += escapeHTML(msg.rcpt[r]);
 184                                 }
 185                                 outmsg += "</span>";
 186                         }
 187
 188                         // Display the Cc: recipients, if any are present
 189                         if (msg.cccc) {
 190                                 outmsg += "<br><span>" + _("Cc:") + " ";
 191                                 for (let r=0; r<msg.cccc.length; ++r) {
 192                                         if (r != 0) {
 193                                                 outmsg += ", ";
 194                                         }
 195                                         outmsg += escapeHTML(msg.cccc[r]);
 196                                 }
 197                                 outmsg += "</span>";
 198                         }
 199
 200                         // Display a subject line, but only if the message has a subject (internal Citadel messages often don't)
 201                         if (msg.subj) {
 202                                 outmsg +=
 203                                 "<br><span class=\"ctdl-msgsubject\">" + msg.subj + "</span>";
 204                         }
 205
 206                         outmsg +=
 207                           "</div>";                                             // end header
 208                 }
 209
 210                 // Display attachments, if any are present
 211                 if (msg.part) {
 212                         let display_attachments = 0;
 213                         for (let r=0; r<msg.part.length; ++r) {
 214                                 if (msg.part[r].disp == "attachment") {
 215                                         if (display_attachments == 0) {
 216                                                 outmsg += "<ul>";
 217                                         }
 218                                         display_attachments += 1;
 219                                         outmsg += "<li>"
 220                                                 + "<a href=\"/ctdl/r/" + escapeHTMLURI(current_room) + "/" + msgnum + "/" + msg.part[r].partnum + "/" + escapeHTMLURI(msg.part[r].filename) + "\" target=\"_blank\">"
 221                                                 + "<i class=\"fa fa-paperclip\"></i>&nbsp;" + msg.part[r].partnum + ": " + msg.part[r].filename
 222                                                 + " (" + msg.part[r].len + " " + _("bytes") + ")"
 223                                                 + "</a>"
 224                                                 + "</li>";
 225                                 }
 226                         }
 227                         if (display_attachments > 0) {
 228                                 outmsg += "</ul><br>";
 229                         }
 230                 }
 231
 232
 233                 outmsg +=
 234                   "<div class=\"ctdl-msg-body\" id=\"" + div + "_body\">"       // begin body
 235                 + msg.text
 236                 + "</div>"                                                      // end body
 237                 + "</div>"                                                      // end content
 238                 + "</div>"                                                      // end wrapper
 239                 ;
 240         }
 241         catch(err) {
 242                 outmsg = "<div class=\"ctdl-mmsg-wrapper\">" + err.message + "</div>";
 243         }
 244
 245         target_div.innerHTML = outmsg;
 246 }
 247
 248
 249 // display an individual message (note: this wants an actual div object, not a string containing the name of a div)
 250 function mail_display_message(msgnum, target_div, include_controls) {
 251         url = "/ctdl/r/" + escapeHTMLURI(current_room) + "/" + msgnum + "/json";
 252         mail_fetch_msg = async() => {
 253                 response = await fetch(url);
 254                 msg = await(response.json());
 255                 if (response.ok) {
 256                         mail_render_one(msgnum, msg, target_div, include_controls);
 257                 }
 258         }
 259         mail_fetch_msg();
 260 }
 261
 262
 263 // A message has been selected...
 264 function click_message(event, msgnum) {
 265         var table = document.getElementById("ctdl-onscreen-mailbox");
 266         var i, m, row;
 267
 268         // ctrl + click = toggle an individual message without changing existing selection
 269         if (event.ctrlKey) {
 270                 document.getElementById("ctdl-msgsum-" + msgnum).classList.toggle("ctdl-mail-selected");
 271         }
 272
 273         // shift + click = select a range of messages (start with row 1 because row 0 is the header)
 274         else if (event.shiftKey) {
 275                 for (i=1; row=table.rows[i]; ++i) {
 276                         m = parseInt(row["id"].substring(12));                          // derive msgnum from row id
 277                         if (
 278                                 ((msgnum >= displayed_message) && (m >= displayed_message) && (m <= msgnum))
 279                                 || ((msgnum <= displayed_message) && (m <= displayed_message) && (m >= msgnum))
 280                         ) {
 281                                 row.classList.add("ctdl-mail-selected");
 282                         }
 283                         else {
 284                                 row.classList.remove("ctdl-mail-selected");
 285                         }
 286                 }
 287         }
 288
 289         // click + no modifiers = select one message and unselect all others (start with row 1 because row 0 is the header)
 290         else {
 291                 for (i=1; row=table.rows[i]; ++i) {
 292                         if (row["id"] == "ctdl-msgsum-" + msgnum) {
 293                                 row.classList.add("ctdl-mail-selected");
 294                         }
 295                         else {
 296                                 row.classList.remove("ctdl-mail-selected");
 297                         }
 298                 }
 299         }
 300
 301         // display the message if it isn't already displayed
 302         if (displayed_message != msgnum) {
 303                 displayed_message = msgnum;
 304                 mail_display_message(msgnum, document.getElementById("ctdl-mailbox-reading-pane"), 1);
 305         }
 306 }
 307
 308
 309 // render one row in the mailbox table (this could be called from one of several places)
 310 function mail_render_row(msg, is_selected) {
 311         let row = "<tr "
 312                 + "id=\"ctdl-msgsum-" + msg["msgnum"] + "\" "
 313                 + (is_selected ? "class=\"ctdl-mail-selected\" " : "")
 314                 + "onClick=\"click_message(event," + msg["msgnum"] + ");\""
 315                 + "onselectstart=\"return false;\" "
 316                 + "draggable=\"true\" "
 317                 + "ondragstart=\"mail_dragstart(event)\" "
 318                 + ">"
 319                 + "<td class=\"ctdl-mail-subject\">" + msg["subject"] + "</td>"
 320                 + "<td class=\"ctdl-mail-sender\">" + msg["author"] + "</td>"
 321                 + "<td class=\"ctdl-mail-date\">" + string_timestamp(msg["time"],1) + "</td>"
 322                 + "<td class=\"ctdl-mail-msgnum\">" + msg["msgnum"] + "</td>"
 323                 + "</tr>";
 324         return(row);
 325 }
 326
 327
 328 // RENDERER FOR THIS VIEW
 329 function view_render_mail() {
 330         // Put the "enter new message" button into the topbar
 331         document.getElementById("ctdl-newmsg-button").innerHTML = "<i class=\"fa fa-edit\"></i>" + _("Write mail");
 332         document.getElementById("ctdl-newmsg-button").style.display = "block";
 333
 334         // Put the "delete message(s)" button into the topbar
 335         let d = document.getElementById("ctdl-delete-button");
 336         d.innerHTML = "<i class=\"fa fa-trash\"></i>" + _("Delete");
 337         d.style.display = "block";
 338         //d.addEventListener("click", mail_delete_selected);
 339
 340         document.getElementById("ctdl-main").innerHTML
 341                 = "<div id=\"ctdl-mailbox-grid-container\" class=\"ctdl-mailbox-grid-container\">"
 342                 + "<div id=\"ctdl-mailbox-pane\" class=\"ctdl-mailbox-pane\"></div>"
 343                 + "<div id=\"ctdl-mailbox-reading-pane\" class=\"ctdl-mailbox-reading-pane\"></div>"
 344                 + "</div>"
 345         ;
 346
 347         highest_mailnum = 0;                                    // Keep track of highest message number to track newly arrived messages
 348         render_mailbox_display(newmail_notify.NO);
 349         try {                                                   // if this was already set up, clear it so there aren't multiple
 350                 clearInterval(RefreshMailboxInterval);
 351         }
 352         catch {
 353         }
 354         RefreshMailboxInterval = setInterval(refresh_mail_display, 10000);
 355 }
 356
 357
 358 // Refresh the mailbox, either for the first time or whenever needed
 359 function refresh_mail_display() {
 360         // If the "ctdl-mailbox-pane" no longer exists, the user has navigated to a different part of the site,
 361         // so cancel the refresh.
 362         try {
 363                 document.getElementById("ctdl-mailbox-pane").innerHTML;
 364         }
 365         catch {
 366                 clearInterval(RefreshMailboxInterval);
 367                 return;
 368         }
 369
 370         // Ask the server if the room has been written to since our last look at it.
 371         url = "/ctdl/r/" + escapeHTMLURI(current_room) + "/stat";
 372         fetch_stat = async() => {
 373                 response = await fetch(url);
 374                 stat = await(response.json());
 375                 if (stat.room_mtime > room_mtime) {                     // if modified...
 376                         room_mtime = stat.room_mtime;
 377                         render_mailbox_display(newmail_notify.YES);     // ...force a refresh
 378                 }
 379         }
 380         fetch_stat();
 381 }
 382
 383
 384 // This is where the rendering of the message list in the mailbox view is performed.
 385 // Set notify to newmail_notify.NO or newmail_notify.YES depending on whether we are interested in the arrival of new messages.
 386 function render_mailbox_display(notify) {
 387
 388         url = "/ctdl/r/" + escapeHTMLURI(current_room) + "/mailbox";
 389         fetch_mailbox = async() => {
 390                 response = await fetch(url);
 391                 msgs = await(response.json());
 392                 if (response.ok) {
 393                         var previously_selected = [];
 394                         var oldtable = document.getElementById("ctdl-onscreen-mailbox");
 395                         var i, row;
 396
 397                         // If one or more messages was already selected, remember them so we can re-select them
 398                         if ( (displayed_message > 0) && (oldtable) ) {
 399                                 for (i=0; row=oldtable.rows[i]; ++i) {
 400                                         if (row.classList.contains("ctdl-mail-selected")) {
 401                                                 previously_selected.push(parseInt(row["id"].substring(12)));
 402                                         }
 403                                 }
 404                         }
 405
 406                         // begin rendering the mailbox table
 407                         box =   "<table id=\"ctdl-onscreen-mailbox\" class=\"ctdl-mailbox-table\" width=100%><tr>"
 408                                 + "<th>" + _("Subject") + "</th>"
 409                                 + "<th>" + _("Sender") + "</th>"
 410                                 + "<th>" + _("Date") + "</th>"
 411                                 + "<th>#</th>"
 412                                 + "</tr>";
 413
 414                         for (let i=0; i<msgs.length; ++i) {
 415                                 let m = parseInt(msgs[i].msgnum);
 416                                 let s = (previously_selected.includes(m));
 417                                 box += mail_render_row(msgs[i], s);
 418                                 if (m > highest_mailnum) {
 419                                         highest_mailnum = m;
 420                                 }
 421                         }
 422
 423                         box +=  "</table>";
 424                         document.getElementById("ctdl-mailbox-pane").innerHTML = box;
 425                         document.addEventListener("keydown", mail_keypress);
 426                 }
 427         }
 428         fetch_mailbox();
 429 }
 430
 431
 432 // Compose a new mail message (called by the Reply button here, or by the dispatcher in views.js)
 433 function mail_compose(is_quoted, references, quoted_msgnum, m_to, m_cc, m_subject) {
 434         // m_to will be an array of zero or more recipients for the To: field.  Convert it to a string.
 435         if (m_to) {
 436                 m_to = Array.from(new Set(m_to));       // remove dupes
 437                 m_to_str = "";
 438                 for (i=0; i<m_to.length; ++i) {
 439                         if (i > 0) {
 440                                 m_to_str += ", ";
 441                         }
 442                         m_to_str += m_to[i].replaceAll("<", "&lt;").replaceAll(">", "&gt;");
 443                 }
 444         }
 445         else {
 446                 m_to_str = "";
 447         }
 448
 449         // m_to will be an array of zero or more recipients for the Cc: field.  Convert it to a string.
 450         if (m_cc) {
 451                 m_cc = Array.from(new Set(m_cc));       // remove dupes
 452                 m_cc_str = "";
 453                 for (i=0; i<m_cc.length; ++i) {
 454                         if (i > 0) {
 455                                 m_cc_str += ", ";
 456                         }
 457                         m_cc_str += m_cc[i].replaceAll("<", "&lt;").replaceAll(">", "&gt;");
 458                 }
 459         }
 460         else {
 461                 m_cc_str = "";
 462         }
 463
 464         quoted_div_name = randomString();
 465
 466         // Make the "Write mail" button disappear.  We're already there!
 467         document.getElementById("ctdl-newmsg-button").style.display = "none";
 468
 469         // is_quoted    true or false depending on whether the user selected "reply quoted" (is this appropriate for mail?)
 470         // references   list of references, be sure to use this in a reply
 471         // msgid        if a reply, the msgid of the most recent message in the chain, the one to which we are replying
 472
 473         // Now display the screen.  (Yes, I combined regular strings + template literals.  I just learned template literals.  Converting to all template literals would be fine.)
 474         compose_screen =
 475                 // Hidden values that we are storing right here in the document tree for later
 476                   "<input id=\"ctdl_mc_is_quoted\" style=\"display:none\" value=\"" + is_quoted + "\"></input>"
 477                 + "<input id=\"ctdl_mc_references\" style=\"display:none\" value=\"" + references + "\"></input>"
 478
 479                 // Header fields, the composition window, and the button bar are arranged using a Grid layout.
 480                 + "<div id=\"ctdl-compose-mail\" class=\"ctdl-compose-mail\">"
 481
 482                 // Visible To: field, plus a box to make the CC/BCC lines appear
 483                 + "<div class=\"ctdl-compose-to-label\">" + _("To:") + "</div>"
 484                 + "<div class=\"ctdl-compose-to-line\">"
 485                 + "<div class=\"ctdl-compose-to-field\" id=\"ctdl-compose-to-field\" contenteditable=\"true\">" + m_to_str + "</div>"
 486                 + "<div class=\"ctdl-cc-bcc-buttons ctdl-msg-button\" id=\"ctdl-cc-bcc-buttons\" "
 487                 + "onClick=\"make_cc_bcc_visible()\">"
 488                 + _("CC:") + "/" + _("BCC:") + "</div>"
 489                 + "</div>"
 490
 491                 // CC/BCC
 492                 + "<div class=\"ctdl-compose-cc-label\" id=\"ctdl-compose-cc-label\">" + _("CC:") + "</div>"
 493                 + "<div class=\"ctdl-compose-cc-field\" id=\"ctdl-compose-cc-field\" contenteditable=\"true\">" + m_cc_str + "</div>"
 494                 + "<div class=\"ctdl-compose-bcc-label\" id=\"ctdl-compose-bcc-label\">" + _("BCC:") + "</div>"
 495                 + "<div class=\"ctdl-compose-bcc-field\" id=\"ctdl-compose-bcc-field\" contenteditable=\"true\"></div>"
 496
 497                 // Visible subject field
 498                 + "<div class=\"ctdl-compose-subject-label\">" + _("Subject:") + "</div>"
 499                 + "<div class=\"ctdl-compose-subject-field\" id=\"ctdl-compose-subject-field\" contenteditable=\"true\">" + m_subject + "</div>"
 500
 501                 // Message composition box
 502                 + "<div class=\"ctdl-compose-message-box\" id=\"ctdl-editor-body\" contenteditable=\"true\">"
 503         ;
 504
 505         // If this is a quoted reply, insert a div within which we will render the original message.
 506         if (is_quoted) {
 507                 compose_screen += "<br><br><blockquote><div id=\"" + quoted_div_name + "\">QUOTED MESSAGE HERE</div></blockquote>";
 508         }
 509
 510         // The button bar is a Grid element, and is also a Flexbox container.
 511         compose_screen += `
 512                 </div>
 513                 <div class="ctdl-compose-toolbar">
 514                 <span class="ctdl-msg-button" onclick="mail_send_message()"><i class="fa fa-paper-plane" style="color:green"></i> ${_("Send message")} </span>
 515                 <span class="ctdl-msg-button"> ${_("Save to Drafts")} </span>
 516                 <span class="ctdl-msg-button" onClick="show_or_hide_upload_window()"><i class="fa fa-paperclip" style="color:grey"></i> ${_("Attachments:")} <span id="ctdl_num_attachments"> ${uploads.length} </span></span>
 517                 <span class="ctdl-msg-button">  ${_("Contacts")} </span>
 518                 <span class="ctdl-msg-button" onClick="flush_uploads();gotoroom(current_room)"><i class="fa fa-trash" style="color:red"></i> ${_("Cancel")} </span>
 519                 </div>`
 520         ;
 521
 522
 523         document.getElementById("ctdl-main").innerHTML = compose_screen;
 524
 525         if (m_cc) {
 526                 document.getElementById("ctdl-compose-cc-label").style.display = "block";
 527                 document.getElementById("ctdl-compose-cc-field").style.display = "block";
 528         }
 529
 530         activate_uploads("ctdl-editor-body");
 531
 532         // If this is a quoted reply, render the original message into the div we set up earlier.
 533         if (is_quoted) {
 534                 document.getElementById(quoted_div_name).innerHTML = quoted_msgnum;
 535                 mail_display_message(quoted_msgnum, document.getElementById(quoted_div_name), 0);
 536         }
 537 }
 538
 539 // Called when the user clicks the button to make the hidden "CC" and "BCC" lines appear.
 540 // It is also called automatically during a Reply when CC is pre-populated.
 541 function make_cc_bcc_visible() {
 542         document.getElementById("ctdl-cc-bcc-buttons").style.display = "none";
 543         document.getElementById("ctdl-compose-bcc-label").style.display = "block";
 544         document.getElementById("ctdl-compose-bcc-field").style.display = "block";
 545 }
 546
 547
 548 // Helper function for mail_send_messages() to extract and decode metadata values.
 549 function msm_field(element_name, separator) {
 550         let s1 = document.getElementById(element_name).innerHTML;
 551         let s2 = s1.replaceAll("|",separator);          // Replace "|" with "!" because "|" is a field separator in Citadel
 552         let s3 = decodeURI(s2);
 553         let s4 = document.createElement("textarea");    // This One Weird Trick Unescapes All HTML Entities
 554         s4.innerHTML = s3;
 555         let s5 = s4.value;
 556         return(s5);
 557 }
 558
 559
 560 // Save the posted message to the server
 561 function mail_send_message() {
 562
 563         document.body.style.cursor = "wait";
 564         deactivate_uploads();
 565         let url = "/ctdl/r/" + escapeHTMLURI(current_room)
 566                 + "/dummy_name_for_new_mail"
 567                 + "?wefw="      + msm_field("ctdl_mc_references", "!")                          // references (if present)
 568                 + "&subj="      + msm_field("ctdl-compose-subject-field", " ")                  // subject (if present)
 569                 + "&mailto="    + msm_field("ctdl-compose-to-field", ",")                       // To: (required)
 570                 + "&mailcc="    + msm_field("ctdl-compose-cc-field", ",")                       // Cc: (if present)
 571                 + "&mailbcc="   + msm_field("ctdl-compose-bcc-field", ",")                      // Bcc: (if present)
 572         ;
 573         if (uploads.length > 0) {
 574                 url += "&att=";
 575                 for (let i=0; i<uploads.length; ++i) {
 576                         url += uploads[i]["ref"];
 577                         if (i != uploads.length - 1) {
 578                                 url += ",";
 579                         }
 580                 }
 581         }
 582         body_text = "<html><body>" + document.getElementById("ctdl-editor-body").innerHTML + "</body></html>\r\n";
 583
 584         var request = new XMLHttpRequest();
 585         request.open("PUT", url, true);
 586         request.setRequestHeader("Content-type", "text/html");
 587         request.onreadystatechange = function() {
 588                 if (request.readyState == 4) {
 589                         document.body.style.cursor = "default";
 590                         if (Math.trunc(request.status / 100) == 2) {
 591                                 headers = request.getAllResponseHeaders().split("\n");
 592                                 for (var i in headers) {
 593                                         if (headers[i].startsWith("etag: ")) {
 594                                                 new_msg_num = headers[i].split(" ")[1];
 595                                         }
 596                                 }
 597
 598                                 // successfully saving a message means the attachments are now gone from the server.
 599                                 uploads = [];
 600
 601                                 // After saving the message, go back to the mailbox view.
 602                                 gotoroom(current_room);
 603
 604                         }
 605                         else {
 606                                 error_message = request.responseText;
 607                                 if (error_message.length == 0) {
 608                                         error_message = _("An error has occurred.");
 609                                 }
 610                                 alert(error_message);                                           // editor remains open
 611                         }
 612                 }
 613         };
 614         request.send(body_text);
 615 }