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 var uploads_in_progress = 0;
  17 var uploads = [] ;                                                              // everything the user has uploaded
  18
  19
  20 // This is the async back end for mail_delete_selected()
  21 mail_delete_func = async(table, row) => {
  22         let m = parseInt(row["id"].substring(12));                              // derive msgnum from row id
  23
  24         if (is_trash_folder) {
  25                 response = await fetch(
  26                         "/ctdl/r/" + escapeHTMLURI(current_room) + "/" + m,
  27                         {
  28                                 method: "DELETE"                                // If this is the Trash folder, delete permanently
  29                         },
  30                 );
  31         }
  32         else {
  33                 response = await fetch(
  34                         "/ctdl/r/" + escapeHTMLURI(current_room) + "/" + m,
  35                         {
  36                                 method: "MOVE",                                 // Otherwise, move to the Trash folder
  37                                 headers: { "Destination" : "/ctdl/r/_TRASH_" }
  38                         },
  39                 );
  40         }
  41
  42         if (response.ok) {                              // If the server accepted the delete, blank out the message div
  43                 table.deleteRow(row.rowIndex);
  44                 if (m == displayed_message) {
  45                         document.getElementById("ctdl-mailbox-reading-pane").innerHTML = "";
  46                         displayed_message = 0;
  47                 }
  48         }
  49 }
  50
  51
  52 // Delete the selected messages (can be activated by mouse click or keypress)
  53 function mail_delete_selected() {
  54         let table = document.getElementById("ctdl-onscreen-mailbox");
  55         let i, row;
  56         for (i=0; row=table.rows[i]; ++i) {
  57                 if (row.classList.contains("ctdl-mail-selected")) {
  58                         mail_delete_func(table, row);
  59                 }
  60         }
  61 }
  62
  63
  64 // Handler function for keypresses detected while the mail view is displayed.  Mainly for deleting messages.
  65 function mail_keypress(event) {
  66
  67         // If the "ctdl-mailbox-pane" no longer exists, the user has navigated to a different part of the site,
  68         // so cancel the event listener.
  69         try {
  70                 document.getElementById("ctdl-mailbox-pane").innerHTML;
  71         }
  72         catch {
  73                 document.removeEventListener("keydown", mail_keypress);
  74                 return;
  75         }
  76
  77         const key = event.key.toLowerCase();
  78         if (key == "delete") {
  79                 mail_delete_selected();
  80         }
  81
  82 }
  83
  84
  85 // Handler function for dragging email messages to other folders
  86 function mail_dragstart(event) {
  87         let i;
  88         let count = 0;
  89         let table = document.getElementById("ctdl-onscreen-mailbox");
  90         let messages_being_dragged = [] ;
  91
  92         if (event.target.classList.contains("ctdl-mail-selected")) {
  93                 // The row being dragged IS selected.  See if any OTHER rows are selected, and they will come along for the ride.
  94                 for (i=1; row=table.rows[i]; ++i) {
  95                         if (row.classList.contains("ctdl-mail-selected")) {
  96                                 count = count + 1;
  97                                 messages_being_dragged.push(row.id);    // Tell the clipboard what's being moved.
  98                         }
  99                 }
 100         }
 101         else {
 102                 // The row being dragged is NOT selected.  It will be dragged on its own, ignoring the selected rows.
 103                 count = 1;
 104                 messages_being_dragged.push(event.target.id);           // Tell the clipboard what's being moved.
 105         }
 106
 107         // Set the custom drag image to an envelope + number of messages being dragged
 108         d = document.getElementById("ctdl_draggo");
 109         d.innerHTML = "<font size='+2'><i class='fa fa-envelope' style='color: red'></i> " + count + "</font>"
 110         event.dataTransfer.setDragImage(d, 0, 0);
 111         event.dataTransfer.setData("text", messages_being_dragged);
 112 }
 113
 114
 115 // Render reply address for a message (FIXME figure out how to deal with "reply-to:")
 116 function reply_addr(msg) {
 117         //if (msg.locl) {
 118                 //return([msg.from]);
 119         //}
 120         //else {
 121                 return([msg.from + " &lt;" + msg.rfca + "&gt;"]);
 122         //}
 123 }
 124
 125
 126 // Render the To: recipients for a reply-all operation
 127 function replyall_to(msg) {
 128         return([...reply_addr(msg), ...msg.rcpt]);
 129 }
 130
 131
 132 // Render a message into the mailbox view
 133 // (We want the message number and the message itself because we need to keep the msgnum for reply purposes)
 134 function mail_render_one(msgnum, msg, target_div, include_controls) {
 135         let div = "";
 136         try {
 137                 outmsg =
 138                   "<div class=\"ctdl-mmsg-wrapper\">"                           // begin message wrapper
 139                 ;
 140
 141                 if (include_controls) {                                         // omit controls if this is a pull quote
 142                         outmsg +=
 143                           render_userpic(msg.from)                              // user avatar
 144                         + "<div class=\"ctdl-mmsg-content\">"                   // begin content
 145                         + "<div class=\"ctdl-msg-header\">"                     // begin header
 146                         + "<span class=\"ctdl-msg-header-info\">"               // begin header info on left side
 147                         + render_msg_author(msg, views.VIEW_MAILBOX)
 148                         + "<span class=\"ctdl-msgdate\">"
 149                         + string_timestamp(msg.time,0)
 150                         + "</span>"                                             // end msgdate
 151                         + "</span>"                                             // end header info on left side
 152                         + "<span class=\"ctdl-msg-header-buttons\">"            // begin buttons on right side
 153
 154                         + "<span class=\"ctdl-msg-button\">"                    // Reply (mail is always Quoted)
 155                         + "<a href=\"javascript:mail_compose(true,'"+msg.wefw+"','"+msgnum+"', reply_addr(msg), [], 'Re: '+msg.subj);\">"
 156                         + "<i class=\"fa fa-reply\"></i> "
 157                         + _("Reply")
 158                         + "</a></span>"
 159
 160                         + "<span class=\"ctdl-msg-button\">"                    // Reply-All (mail is always Quoted)
 161                         + "<a href=\"javascript:mail_compose(true,'"+msg.wefw+"','"+msgnum+"', replyall_to(msg), msg.cccc, 'Re: '+msg.subj);\">"
 162                         + "<i class=\"fa fa-reply-all\"></i> "
 163                         + _("ReplyAll")
 164                         + "</a></span>";
 165
 166                         if (can_delete_messages) {
 167                                 outmsg +=
 168                                 "<span class=\"ctdl-msg-button\">"
 169                                 + "<a href=\"javascript:forum_delete_message('"+div+"','"+msg.msgnum+"');\">"
 170                                 + "<i class=\"fa fa-trash\"></i> "
 171                                 + _("Delete")
 172                                 + "</a></span>";
 173                         }
 174
 175                         outmsg +=
 176                           "</span>";                                            // end buttons on right side
 177
 178                         // Display the To: recipients, if any are present
 179                         if (msg.rcpt) {
 180                                 outmsg += "<br><span>" + _("To:") + " ";
 181                                 for (let r=0; r<msg.rcpt.length; ++r) {
 182                                         if (r != 0) {
 183                                                 outmsg += ", ";
 184                                         }
 185                                         outmsg += escapeHTML(msg.rcpt[r]);
 186                                 }
 187                                 outmsg += "</span>";
 188                         }
 189
 190                         // Display the Cc: recipients, if any are present
 191                         if (msg.cccc) {
 192                                 outmsg += "<br><span>" + _("Cc:") + " ";
 193                                 for (let r=0; r<msg.cccc.length; ++r) {
 194                                         if (r != 0) {
 195                                                 outmsg += ", ";
 196                                         }
 197                                         outmsg += escapeHTML(msg.cccc[r]);
 198                                 }
 199                                 outmsg += "</span>";
 200                         }
 201
 202                         // Display a subject line, but only if the message has a subject (internal Citadel messages often don't)
 203                         if (msg.subj) {
 204                                 outmsg +=
 205                                 "<br><span class=\"ctdl-msgsubject\">" + msg.subj + "</span>";
 206                         }
 207
 208                         outmsg +=
 209                           "</div>";                                             // end header
 210                 }
 211
 212                 // Display attachments, if any are present
 213                 if (msg.part) {
 214                         let display_attachments = 0;
 215                         for (let r=0; r<msg.part.length; ++r) {
 216                                 if (msg.part[r].disp == "attachment") {
 217                                         if (display_attachments == 0) {
 218                                                 outmsg += "<ul>";
 219                                         }
 220                                         display_attachments += 1;
 221                                         outmsg += "<li>"
 222                                                 + "<a href=\"/ctdl/r/" + escapeHTMLURI(current_room) + "/" + msgnum + "/" + msg.part[r].partnum + "/" + escapeHTMLURI(msg.part[r].filename) + "\" target=\"_blank\">"
 223                                                 + "<i class=\"fa fa-paperclip\"></i>&nbsp;" + msg.part[r].partnum + ": " + msg.part[r].filename
 224                                                 + " (" + msg.part[r].len + " " + _("bytes") + ")"
 225                                                 + "</a>"
 226                                                 + "</li>";
 227                                 }
 228                         }
 229                         if (display_attachments > 0) {
 230                                 outmsg += "</ul><br>";
 231                         }
 232                 }
 233
 234
 235                 outmsg +=
 236                   "<div class=\"ctdl-msg-body\" id=\"" + div + "_body\">"       // begin body
 237                 + msg.text
 238                 + "</div>"                                                      // end body
 239                 + "</div>"                                                      // end content
 240                 + "</div>"                                                      // end wrapper
 241                 ;
 242         }
 243         catch(err) {
 244                 outmsg = "<div class=\"ctdl-mmsg-wrapper\">" + err.message + "</div>";
 245         }
 246
 247         target_div.innerHTML = outmsg;
 248 }
 249
 250
 251 // display an individual message (note: this wants an actual div object, not a string containing the name of a div)
 252 function mail_display_message(msgnum, target_div, include_controls) {
 253         url = "/ctdl/r/" + escapeHTMLURI(current_room) + "/" + msgnum + "/json";
 254         mail_fetch_msg = async() => {
 255                 response = await fetch(url);
 256                 msg = await(response.json());
 257                 if (response.ok) {
 258                         mail_render_one(msgnum, msg, target_div, include_controls);
 259                 }
 260         }
 261         mail_fetch_msg();
 262 }
 263
 264
 265 // A message has been selected...
 266 function click_message(event, msgnum) {
 267         var table = document.getElementById("ctdl-onscreen-mailbox");
 268         var i, m, row;
 269
 270         // ctrl + click = toggle an individual message without changing existing selection
 271         if (event.ctrlKey) {
 272                 document.getElementById("ctdl-msgsum-" + msgnum).classList.toggle("ctdl-mail-selected");
 273         }
 274
 275         // shift + click = select a range of messages (start with row 1 because row 0 is the header)
 276         else if (event.shiftKey) {
 277                 for (i=1; row=table.rows[i]; ++i) {
 278                         m = parseInt(row["id"].substring(12));                          // derive msgnum from row id
 279                         if (
 280                                 ((msgnum >= displayed_message) && (m >= displayed_message) && (m <= msgnum))
 281                                 || ((msgnum <= displayed_message) && (m <= displayed_message) && (m >= msgnum))
 282                         ) {
 283                                 row.classList.add("ctdl-mail-selected");
 284                         }
 285                         else {
 286                                 row.classList.remove("ctdl-mail-selected");
 287                         }
 288                 }
 289         }
 290
 291         // click + no modifiers = select one message and unselect all others (start with row 1 because row 0 is the header)
 292         else {
 293                 for (i=1; row=table.rows[i]; ++i) {
 294                         if (row["id"] == "ctdl-msgsum-" + msgnum) {
 295                                 row.classList.add("ctdl-mail-selected");
 296                         }
 297                         else {
 298                                 row.classList.remove("ctdl-mail-selected");
 299                         }
 300                 }
 301         }
 302
 303         // display the message if it isn't already displayed
 304         if (displayed_message != msgnum) {
 305                 displayed_message = msgnum;
 306                 mail_display_message(msgnum, document.getElementById("ctdl-mailbox-reading-pane"), 1);
 307         }
 308 }
 309
 310
 311 // render one row in the mailbox table (this could be called from one of several places)
 312 function mail_render_row(msg, is_selected) {
 313         let row = "<tr "
 314                 + "id=\"ctdl-msgsum-" + msg["msgnum"] + "\" "
 315                 + (is_selected ? "class=\"ctdl-mail-selected\" " : "")
 316                 + "onClick=\"click_message(event," + msg["msgnum"] + ");\""
 317                 + "onselectstart=\"return false;\" "
 318                 + "draggable=\"true\" "
 319                 + "ondragstart=\"mail_dragstart(event)\" "
 320                 + ">"
 321                 + "<td class=\"ctdl-mail-subject\">" + msg["subject"] + "</td>"
 322                 + "<td class=\"ctdl-mail-sender\">" + msg["author"] + "</td>"
 323                 + "<td class=\"ctdl-mail-date\">" + string_timestamp(msg["time"],1) + "</td>"
 324                 + "<td class=\"ctdl-mail-msgnum\">" + msg["msgnum"] + "</td>"
 325                 + "</tr>";
 326         return(row);
 327 }
 328
 329
 330 // RENDERER FOR THIS VIEW
 331 function view_render_mail() {
 332         // Put the "enter new message" button into the topbar
 333         document.getElementById("ctdl-newmsg-button").innerHTML = "<i class=\"fa fa-edit\"></i>" + _("Write mail");
 334         document.getElementById("ctdl-newmsg-button").style.display = "block";
 335
 336         // Put the "delete message(s)" button into the topbar
 337         let d = document.getElementById("ctdl-delete-button");
 338         d.innerHTML = "<i class=\"fa fa-trash\"></i>" + _("Delete");
 339         d.style.display = "block";
 340         //d.addEventListener("click", mail_delete_selected);
 341
 342         document.getElementById("ctdl-main").innerHTML
 343                 = "<div id=\"ctdl-mailbox-grid-container\" class=\"ctdl-mailbox-grid-container\">"
 344                 + "<div id=\"ctdl-mailbox-pane\" class=\"ctdl-mailbox-pane\"></div>"
 345                 + "<div id=\"ctdl-mailbox-reading-pane\" class=\"ctdl-mailbox-reading-pane\"></div>"
 346                 + "</div>"
 347         ;
 348
 349         highest_mailnum = 0;                                    // Keep track of highest message number to track newly arrived messages
 350         render_mailbox_display(newmail_notify.NO);
 351         try {                                                   // if this was already set up, clear it so there aren't multiple
 352                 clearInterval(RefreshMailboxInterval);
 353         }
 354         catch {
 355         }
 356         RefreshMailboxInterval = setInterval(refresh_mail_display, 10000);
 357 }
 358
 359
 360 // Refresh the mailbox, either for the first time or whenever needed
 361 function refresh_mail_display() {
 362         // If the "ctdl-mailbox-pane" no longer exists, the user has navigated to a different part of the site,
 363         // so cancel the refresh.
 364         try {
 365                 document.getElementById("ctdl-mailbox-pane").innerHTML;
 366         }
 367         catch {
 368                 clearInterval(RefreshMailboxInterval);
 369                 return;
 370         }
 371
 372         // Ask the server if the room has been written to since our last look at it.
 373         url = "/ctdl/r/" + escapeHTMLURI(current_room) + "/stat";
 374         fetch_stat = async() => {
 375                 response = await fetch(url);
 376                 stat = await(response.json());
 377                 if (stat.room_mtime > room_mtime) {                     // FIXME commented out to force refreshes
 378                         room_mtime = stat.room_mtime;
 379                         render_mailbox_display(newmail_notify.YES);
 380                 }
 381         }
 382         fetch_stat();
 383 }
 384
 385
 386 // This is where the rendering of the message list in the mailbox view is performed.
 387 // Set notify to newmail_notify.NO or newmail_notify.YES depending on whether we are interested in the arrival of new messages.
 388 function render_mailbox_display(notify) {
 389
 390         url = "/ctdl/r/" + escapeHTMLURI(current_room) + "/mailbox";
 391         fetch_mailbox = async() => {
 392                 response = await fetch(url);
 393                 msgs = await(response.json());
 394                 if (response.ok) {
 395                         var previously_selected = [];
 396                         var oldtable = document.getElementById("ctdl-onscreen-mailbox");
 397                         var i, row;
 398
 399                         // If one or more messages was already selected, remember them so we can re-select them
 400                         if ( (displayed_message > 0) && (oldtable) ) {
 401                                 for (i=0; row=oldtable.rows[i]; ++i) {
 402                                         if (row.classList.contains("ctdl-mail-selected")) {
 403                                                 previously_selected.push(parseInt(row["id"].substring(12)));
 404                                         }
 405                                 }
 406                         }
 407
 408                         // begin rendering the mailbox table
 409                         box =   "<table id=\"ctdl-onscreen-mailbox\" class=\"ctdl-mailbox-table\" width=100%><tr>"
 410                                 + "<th>" + _("Subject") + "</th>"
 411                                 + "<th>" + _("Sender") + "</th>"
 412                                 + "<th>" + _("Date") + "</th>"
 413                                 + "<th>#</th>"
 414                                 + "</tr>";
 415
 416                         for (let i=0; i<msgs.length; ++i) {
 417                                 let m = parseInt(msgs[i].msgnum);
 418                                 let s = (previously_selected.includes(m));
 419                                 box += mail_render_row(msgs[i], s);
 420                                 if (m > highest_mailnum) {
 421                                         highest_mailnum = m;
 422                                 }
 423                         }
 424
 425                         box +=  "</table>";
 426                         document.getElementById("ctdl-mailbox-pane").innerHTML = box;
 427                         document.addEventListener("keydown", mail_keypress);
 428                 }
 429         }
 430         fetch_mailbox();
 431 }
 432
 433
 434 // Compose a new mail message (called by the Reply button here, or by the dispatcher in views.js)
 435 function mail_compose(is_quoted, references, quoted_msgnum, m_to, m_cc, m_subject) {
 436         // m_to will be an array of zero or more recipients for the To: field.  Convert it to a string.
 437         if (m_to) {
 438                 m_to = Array.from(new Set(m_to));       // remove dupes
 439                 m_to_str = "";
 440                 for (i=0; i<m_to.length; ++i) {
 441                         if (i > 0) {
 442                                 m_to_str += ", ";
 443                         }
 444                         m_to_str += m_to[i].replaceAll("<", "&lt;").replaceAll(">", "&gt;");
 445                 }
 446         }
 447         else {
 448                 m_to_str = "";
 449         }
 450
 451         // m_to will be an array of zero or more recipients for the Cc: field.  Convert it to a string.
 452         if (m_cc) {
 453                 m_cc = Array.from(new Set(m_cc));       // remove dupes
 454                 m_cc_str = "";
 455                 for (i=0; i<m_cc.length; ++i) {
 456                         if (i > 0) {
 457                                 m_cc_str += ", ";
 458                         }
 459                         m_cc_str += m_cc[i].replaceAll("<", "&lt;").replaceAll(">", "&gt;");
 460                 }
 461         }
 462         else {
 463                 m_cc_str = "";
 464         }
 465
 466         quoted_div_name = randomString();
 467
 468         // Make the "Write mail" button disappear.  We're already there!
 469         document.getElementById("ctdl-newmsg-button").style.display = "none";
 470
 471         // is_quoted    true or false depending on whether the user selected "reply quoted" (is this appropriate for mail?)
 472         // references   list of references, be sure to use this in a reply
 473         // msgid        if a reply, the msgid of the most recent message in the chain, the one to which we are replying
 474
 475         // Now display the screen.  (Yes, I combined regular strings + template literals.  I just learned template literals.  Converting to all template literals would be fine.)
 476         compose_screen =
 477                 // Hidden values that we are storing right here in the document tree for later
 478                   "<input id=\"ctdl_mc_is_quoted\" style=\"display:none\" value=\"" + is_quoted + "\"></input>"
 479                 + "<input id=\"ctdl_mc_references\" style=\"display:none\" value=\"" + references + "\"></input>"
 480
 481                 // Header fields, the composition window, and the button bar are arranged using a Grid layout.
 482                 + "<div id=\"ctdl-compose-mail\" class=\"ctdl-compose-mail\">"
 483
 484                 // Visible To: field, plus a box to make the CC/BCC lines appear
 485                 + "<div class=\"ctdl-compose-to-label\">" + _("To:") + "</div>"
 486                 + "<div class=\"ctdl-compose-to-line\">"
 487                 + "<div class=\"ctdl-compose-to-field\" id=\"ctdl-compose-to-field\" contenteditable=\"true\">" + m_to_str + "</div>"
 488                 + "<div class=\"ctdl-cc-bcc-buttons ctdl-msg-button\" id=\"ctdl-cc-bcc-buttons\" "
 489                 + "onClick=\"make_cc_bcc_visible()\">"
 490                 + _("CC:") + "/" + _("BCC:") + "</div>"
 491                 + "</div>"
 492
 493                 // CC/BCC
 494                 + "<div class=\"ctdl-compose-cc-label\" id=\"ctdl-compose-cc-label\">" + _("CC:") + "</div>"
 495                 + "<div class=\"ctdl-compose-cc-field\" id=\"ctdl-compose-cc-field\" contenteditable=\"true\">" + m_cc_str + "</div>"
 496                 + "<div class=\"ctdl-compose-bcc-label\" id=\"ctdl-compose-bcc-label\">" + _("BCC:") + "</div>"
 497                 + "<div class=\"ctdl-compose-bcc-field\" id=\"ctdl-compose-bcc-field\" contenteditable=\"true\"></div>"
 498
 499                 // Visible subject field
 500                 + "<div class=\"ctdl-compose-subject-label\">" + _("Subject:") + "</div>"
 501                 + "<div class=\"ctdl-compose-subject-field\" id=\"ctdl-compose-subject-field\" contenteditable=\"true\">" + m_subject + "</div>"
 502
 503                 // Message composition box
 504                 + "<div class=\"ctdl-compose-message-box\" id=\"ctdl-editor-body\" contenteditable=\"true\">"
 505         ;
 506
 507         if (is_quoted) {
 508                 compose_screen += "<br><br><blockquote><div id=\"" + quoted_div_name + "\"></div></blockquote>";
 509         }
 510
 511         // The button bar is a Grid element, and is also a Flexbox container.
 512         compose_screen += `
 513                 </div>
 514                 <div class="ctdl-compose-toolbar">
 515                 <span class="ctdl-msg-button" onclick="mail_send_message()"><i class="fa fa-paper-plane" style="color:green"></i> ${_("Send message")} </span>
 516                 <span class="ctdl-msg-button"> ${_("Save to Drafts")} </span>
 517                 <span class="ctdl-msg-button" onClick="show_or_hide_attachments()"><i class="fa fa-paperclip" style="color:grey"></i> ${_("Attachments:")} <span id="ctdl_num_attachments"> ${uploads.length} </span></span>
 518                 <span class="ctdl-msg-button">  ${_("Contacts")} </span>
 519                 <span class="ctdl-msg-button" onClick="document.getElementById('ctdl-upload').style.display='none';uploads=[];gotoroom(current_room)"><i class="fa fa-trash" style="color:red"></i> ${_("Cancel")} </span>
 520                 </div>`
 521         ;
 522
 523         document.getElementById("ctdl-main").innerHTML = compose_screen;
 524         mail_display_message(quoted_msgnum, document.getElementById(quoted_div_name), 0);
 525         if (m_cc) {
 526                 document.getElementById("ctdl-compose-cc-label").style.display = "block";
 527                 document.getElementById("ctdl-compose-cc-field").style.display = "block";
 528         }
 529
 530         activate_uploads("ctdl-editor-body");
 531 }
 532
 533
 534 // Turn the specified div into a place where we can upload.  (Note: permanently changes the drag-and-drop behavior of that div.)
 535 function activate_uploads(parent_div) {
 536                 document.getElementById(parent_div).innerHTML += `
 537                         <div class="ctdl-upload" id="ctdl-upload">
 538                                 <div id="ctdl_attachments_title" class="ctdl-compose-attachments-title">
 539                                         <div><h1><i class="fa fa-paperclip" style="color:grey"></i>` + _("Attachments:") + ` <span id="num_attachments">` + uploads.length + `</span></h1></div>
 540                                         <div><h1><i class="fas fa-window-close" style="color:red" onClick="show_or_hide_attachments()"></i></h1></div>
 541                                 </div>
 542                                 <br>
 543                                 <ul id="ctdl-upload_list">
 544                                 </ul>
 545                                 <br>
 546                                 <div id="drop-area" class="ctdl-upload-drop-area">
 547                                         <form class="my-form">
 548                                                 <p>${_("Drop files here to upload")}</p>
 549                                                 <input type="file" id="fileElem" multiple accept="*/*" onChange="handle_upload_files(this.files)">
 550                                         </form>
 551                                 </div>
 552                         </div>
 553                 `;
 554
 555                 // activate drag and drop (shamelessly swiped from https://www.smashingmagazine.com/2018/01/drag-drop-file-uploader-vanilla-js/ )
 556                 let dropArea = document.getElementById(parent_div);
 557                 ;['dragenter', 'dragover', 'dragleave', 'drop'].forEach(eventName => {
 558                         dropArea.addEventListener(eventName, upload_prevent_defaults, false)
 559                 })
 560                 ;["dragenter", "dragover"].forEach(eventName => {
 561                         dropArea.addEventListener(eventName, upload_highlight, false)
 562                 })
 563                 ;['dragleave', 'drop'].forEach(eventName => {
 564                         dropArea.addEventListener(eventName, upload_unhighlight, false)
 565                 })
 566                 dropArea.addEventListener('drop', upload_handle_drop, false);
 567 }
 568
 569
 570 // prevent drag and drop events from propagating up through the DOM
 571 function upload_prevent_defaults(e) {
 572         e.preventDefault();
 573         e.stopPropagation();
 574 }
 575
 576
 577 function upload_handle_drop(e) {
 578         let dt = e.dataTransfer;
 579         let files = dt.files;
 580         handle_upload_files(files);
 581 }
 582
 583
 584 function handle_upload_files(files) {
 585         ([...files]).forEach(upload_file)
 586 }
 587
 588
 589 function upload_file(file) {
 590         var url = '/ctdl/a/upload';
 591         var xhr = new XMLHttpRequest();
 592         var formData = new FormData();
 593         xhr.open('POST', url, true);
 594
 595         xhr.addEventListener('readystatechange', function(e) {
 596                 if (xhr.readyState == 4 && xhr.status == 200) {
 597                         // remove the "uploading in progress" message
 598                         let li = document.getElementById("ctdl_uploading_" + uploads_in_progress.toString());
 599                         li.parentNode.removeChild(li);
 600                         uploads_in_progress -= 1;
 601
 602                         // The response body will be a JSON array of completed uploads.
 603                         var j_response = JSON.parse(xhr.response);
 604
 605                         // Add these uploads to the displayed list
 606                         j_response.forEach((item) => {
 607                                 let new_upl = document.createElement("li");
 608                                 new_upl.innerHTML = item["tempfilename"] + " " + item["uploadfilename"] + " " + item["contenttype"] + " " + item["contentlength"];
 609                                 document.getElementById("ctdl-upload_list").appendChild(new_upl);
 610                         });
 611
 612                         // append it to the global list of uploads
 613                         uploads.push(j_response);
 614                         document.getElementById("num_attachments").innerHTML = uploads.length;
 615                 }
 616                 else if (xhr.readyState == 4 && xhr.status != 200) {
 617                         // remove the "uploading in progress" message (there was an error, so just let it disappear)
 618                         let li = document.getElementById("ctdl_uploading_" + uploads_in_progress.toString());
 619                         li.parentNode.removeChild(li);
 620                         uploads_in_progress -= 1;
 621                 }
 622         })
 623
 624         formData.append('file', file);
 625         xhr.send(formData);
 626         uploads_in_progress += 1;
 627
 628         // Make an "uploading in progress" message appear in the uploads list!
 629         progress = document.createElement("li");
 630         progress.setAttribute("id", "ctdl_uploading_" + uploads_in_progress.toString());
 631         progress.innerHTML = `<img src="/ctdl/s/images/throbber.gif" /> ` + _("Processing dropped files...");
 632         document.getElementById("ctdl-upload_list").appendChild(progress);
 633 }
 634
 635
 636 function upload_highlight(e) {
 637         let dropArea = document.getElementById("ctdl-upload");
 638         dropArea.classList.add('highlight')
 639
 640         document.getElementById("ctdl-upload").style.display = "block";         /* also make it appear */
 641 }
 642
 643 function upload_unhighlight(e) {
 644         let dropArea = document.getElementById("ctdl-upload");
 645         dropArea.classList.remove('highlight')
 646 }
 647
 648
 649 // Show or hide the attachments window in the composer
 650 function show_or_hide_attachments() {
 651
 652         if (document.getElementById("ctdl-upload").style.display == "block") {
 653                 document.getElementById("ctdl-upload").style.display = "none";          /* turn it off */
 654         }
 655         else {
 656                 document.getElementById("ctdl-upload").style.display = "block";         /* turn it on */
 657         }
 658 }
 659
 660
 661 // Called when the user clicks the button to make the hidden "CC" and "BCC" lines appear.
 662 // It is also called automatically during a Reply when CC is pre-populated.
 663 function make_cc_bcc_visible() {
 664         document.getElementById("ctdl-cc-bcc-buttons").style.display = "none";
 665         document.getElementById("ctdl-compose-bcc-label").style.display = "block";
 666         document.getElementById("ctdl-compose-bcc-field").style.display = "block";
 667 }
 668
 669
 670 // Helper function for mail_send_messages() to extract and decode metadata values.
 671 function msm_field(element_name, separator) {
 672         let s1 = document.getElementById(element_name).innerHTML;
 673         let s2 = s1.replaceAll("|",separator);          // Replace "|" with "!" because "|" is a field separator in Citadel
 674         let s3 = decodeURI(s2);
 675         let s4 = document.createElement("textarea");    // This One Weird Trick Unescapes All HTML Entities
 676         s4.innerHTML = s3;
 677         let s5 = s4.value;
 678         return(s5);
 679 }
 680
 681
 682 // Save the posted message to the server
 683 function mail_send_message() {
 684
 685         document.body.style.cursor = "wait";
 686         let url = "/ctdl/r/" + escapeHTMLURI(current_room)
 687                 + "/dummy_name_for_new_mail"
 688                 + "?wefw="      + msm_field("ctdl_mc_references", "!")                          // references (if present)
 689                 + "&subj="      + msm_field("ctdl-compose-subject-field", " ")                  // subject (if present)
 690                 + "&mailto="    + msm_field("ctdl-compose-to-field", ",")                       // To: (required)
 691                 + "&mailcc="    + msm_field("ctdl-compose-cc-field", ",")                       // Cc: (if present)
 692                 + "&mailbcc="   + msm_field("ctdl-compose-bcc-field", ",")                      // Bcc: (if present)
 693         ;
 694         boundary = randomString();
 695         body_text =
 696                 "--" + boundary + "\r\n"
 697                 + "Content-type: text/html\r\n"
 698                 + "Content-transfer-encoding: quoted-printable\r\n"
 699                 + "\r\n"
 700                 + quoted_printable_encode(
 701                         "<html><body>" + document.getElementById("ctdl-editor-body").innerHTML + "</body></html>"
 702                 ) + "\r\n"
 703                 + "--" + boundary + "--\r\n"
 704         ;
 705
 706         var request = new XMLHttpRequest();
 707         request.open("PUT", url, true);
 708         request.setRequestHeader("Content-type", "multipart/mixed; boundary=\"" + boundary + "\"");
 709         request.onreadystatechange = function() {
 710                 if (request.readyState == 4) {
 711                         document.body.style.cursor = "default";
 712                         if (Math.trunc(request.status / 100) == 2) {
 713                                 headers = request.getAllResponseHeaders().split("\n");
 714                                 for (var i in headers) {
 715                                         if (headers[i].startsWith("etag: ")) {
 716                                                 new_msg_num = headers[i].split(" ")[1];
 717                                         }
 718                                 }
 719
 720                                 // After saving the message, go back to the mailbox view.
 721                                 gotoroom(current_room);
 722
 723                         }
 724                         else {
 725                                 error_message = request.responseText;
 726                                 if (error_message.length == 0) {
 727                                         error_message = _("An error has occurred.");
 728                                 }
 729                                 alert(error_message);                                           // editor remains open
 730                         }
 731                 }
 732         };
 733         request.send(body_text);
 734 }