webcit-ng/static/js/view_forum.js

   1 // Copyright (c) 2016-2022 by the citadel.org team
   2 //
   3 // This program is open source software.  Use, duplication, or
   4 // disclosure are subject to the GNU General Public License v3.
   5
   6
   7 // Forum view (flat)
   8 function forum_readmessages(target_div_name, gt_msg, lt_msg) {
   9         target_div = document.getElementById(target_div_name);
  10         original_text = target_div.innerHTML;                                   // in case we need to replace it after an error
  11         target_div.innerHTML = ""
  12
  13         if (lt_msg < 9999999999) {
  14                 url = "/ctdl/r/" + escapeHTMLURI(current_room) + "/msgs.lt|" + lt_msg;
  15         }
  16         else {
  17                 url = "/ctdl/r/" + escapeHTMLURI(current_room) + "/msgs.gt|" + gt_msg;
  18         }
  19
  20         fetch_msg_list = async() => {
  21                 response = await fetch(url);
  22                 msgs = await(response.json());
  23                 if (response.ok) {
  24                         target_div.innerHTML = "" ;
  25
  26                         // If we were given an explicit starting point, by all means start there.
  27                         // Note that we don't have to remove them from the array because we did a 'msgs gt|xxx' command to Citadel.
  28                         if (gt_msg > 0) {
  29                                 msgs = msgs.slice(0, messages_per_page);
  30                         }
  31
  32                         // Otherwise, show us the last 20 messages
  33                         else {
  34                                 if (msgs.length > messages_per_page) {
  35                                         msgs = msgs.slice(msgs.length - messages_per_page);
  36                                 }
  37                                 new_old_div_name = randomString();
  38                                 if (msgs.length < 1) {
  39                                         newlt = lt_msg;
  40                                 }
  41                                 else {
  42                                         newlt = msgs[0];
  43                                 }
  44                                 target_div.innerHTML +=
  45                                         "<div id=\"" + new_old_div_name + "\">" +
  46                                         "<div class=\"ctdl-forum-nav\">" +
  47                                         "<a href=\"javascript:forum_readmessages('" + new_old_div_name + "', 0, " + newlt + ");\">" +
  48                                         "<i class=\"fa fa-arrow-circle-up\"></i>&nbsp;&nbsp;" +
  49                                         _("Older posts") + "&nbsp;&nbsp;<i class=\"fa fa-arrow-circle-up\"></a></div></div></a></div></div>" ;
  50                         }
  51
  52                         // The messages will go here.
  53                         let msgs_div_name = randomString();
  54                         target_div.innerHTML += "<div id=\"" + msgs_div_name + "\"> </div>" ;
  55
  56                         if (lt_msg == 9999999999) {
  57                                 new_new_div_name = randomString();
  58                                 if (msgs.length <= 0) {
  59                                         newgt = gt_msg;
  60                                 }
  61                                 else {
  62                                         newgt = msgs[msgs.length-1];
  63                                 }
  64                                 target_div.innerHTML +=
  65                                         "<div id=\"" + new_new_div_name + "\">" +
  66                                         "<div id=\"ctdl-newmsg-here\"></div>" +
  67                                         "<div class=\"ctdl-forum-nav\">" +
  68                                         "<a href=\"javascript:forum_readmessages('" + new_new_div_name + "', " + newgt + ", 9999999999);\">" +
  69                                         "<i class=\"fa fa-arrow-circle-down\"></i>&nbsp;&nbsp;" +
  70                                         _("Newer posts") + "&nbsp;&nbsp;<i class=\"fa fa-arrow-circle-down\"></a></div></div>" ;
  71                         }
  72
  73                         // Now figure out where to scroll to after rendering.
  74                         if (gt_msg > 0) {
  75                                 scroll_to = msgs[0];
  76                         }
  77                         else if (lt_msg < 9999999999) {
  78                                 scroll_to = msgs[msgs.length-1];
  79                         }
  80                         else if ( (logged_in) && (gt_msg == 0) && (lt_msg == 9999999999) ) {
  81                                 scroll_to = msgs[msgs.length-1];
  82                         }
  83                         else {
  84                                 scroll_to = msgs[0];            // FIXME this is too naive
  85                         }
  86
  87                         // Render the individual messages in the divs
  88                         forum_render_messages(msgs, msgs_div_name, scroll_to)
  89                 }
  90                 else {
  91                         // if xhr fails, this will make the link reappear so the user can try again
  92                         target_div.innerHTML = original_text;
  93                 }
  94         }
  95         fetch_msg_list();
  96
  97         // make the nav buttons appear (post a new message, skip this room, goto next room)
  98
  99         document.getElementById("ctdl-newmsg-button").innerHTML = "<i class=\"fa fa-edit\"></i>" + _("Post message");
 100         document.getElementById("ctdl-newmsg-button").style.display = "block";
 101
 102         document.getElementById("ctdl-skip-button").innerHTML = "<i class=\"fa fa-arrow-alt-circle-right\"></i>" + _("Skip this room");
 103         document.getElementById("ctdl-skip-button").style.display = "block";
 104
 105         document.getElementById("ctdl-goto-button").innerHTML = "<i class=\"fa fa-arrow-circle-right\"></i>" + _("Goto next room");
 106         document.getElementById("ctdl-goto-button").style.display = "block";
 107 }
 108
 109
 110 // Render a range of messages into the specified target div
 111 function forum_render_messages(message_numbers, msgs_div_name, scroll_to) {
 112
 113         // Build an array of Promises and then wait for them all to resolve.
 114         let num_msgs = message_numbers.length;
 115         let msg_promises = Array.apply(null, Array(num_msgs));
 116         for (i=0; i<num_msgs; ++i) {
 117                 msg_promises[i] = fetch("/ctdl/r/" + escapeHTMLURI(current_room) + "/" + message_numbers[i] + "/json")
 118                         .then(response => response.json())
 119                         .catch((error) => {
 120                                 response => null;
 121                                 console.error('Error: ', error);
 122                         })
 123                 ;
 124         }
 125
 126         // Here is the async function that waits for all the messages to be loaded, and then renders them.
 127         fetch_msg_list = async() => {
 128                 document.body.style.cursor = "wait";
 129                 activate_loading_modal();
 130                 await Promise.all(msg_promises);
 131                 deactivate_loading_modal();
 132                 document.body.style.cursor = "default";
 133
 134                 // At this point all of the Promises are resolved and we can render.
 135                 // Note: "let" keeps "i" in scope even through the .then scope
 136                 let scroll_to_div = null;
 137                 for (let i=0; i<num_msgs; ++i) {
 138                         msg_promises[i].then((one_message) => {
 139                                 let new_msg_div = forum_render_one(one_message, null);
 140                                 document.getElementById(msgs_div_name).append(new_msg_div);
 141                                 if (message_numbers[i] == scroll_to) {
 142                                         scroll_to_div = new_msg_div;
 143                                 }
 144                                 if (i == num_msgs - 1) {
 145                                         scroll_to_div.scrollIntoView({behavior: "smooth", block: "start", inline: "nearest"});
 146                                 }
 147                         });
 148                 }
 149         }
 150
 151         fetch_msg_list();
 152
 153         // Make a note of the highest message number we saw, so we can mark it when we "Goto next room"
 154         // (Compared to the text client, this is actually more like <A>bandon than <G>oto)
 155         if ((num_msgs > 0) && (message_numbers[num_msgs-1] > last_seen)) {
 156                 last_seen = message_numbers[num_msgs-1];
 157         }
 158 }
 159
 160
 161 // Render a message.  Returns a div object.
 162 function forum_render_one(msg, existing_div) {
 163         let div = null;
 164         if (existing_div != null) {                                             // If an existing div was supplied, render into it
 165                 div = existing_div;
 166         }
 167         else {                                                                  // Otherwise, create a new one
 168                 div = document.createElement("div");
 169         }
 170
 171         mdiv = randomString();                                                  // Give the div a new name
 172         div.id = mdiv;
 173
 174         try {
 175                 outmsg =
 176                   "<div class=\"ctdl-msg-wrapper\">"                            // begin message wrapper
 177                 + "<div class=\"ctdl-avatar\" onClick=\"javascript:user_profile('" + msg.from + "');\">"
 178                 + "<img src=\"/ctdl/u/" + msg.from + "/userpic\" width=\"32\" "
 179                 + "onerror=\"this.parentNode.innerHTML='&lt;i class=&quot;fa fa-user-circle fa-2x&quot;&gt;&lt;/i&gt; '\">"
 180                 + "</div>"                                                      // end avatar
 181                 + "<div class=\"ctdl-msg-content\">"                            // begin content
 182                 + "<div class=\"ctdl-msg-header\">"                             // begin header
 183                 + "<span class=\"ctdl-msg-header-info\">"                       // begin header info on left side
 184                 + "<span class=\"ctdl-username\" onClick=\"javascript:user_profile('" + msg.from + "');\">"
 185                 + msg.from
 186                 + "</a></span>"                                                 // end username
 187                 + "<span class=\"ctdl-msgdate\">"
 188                 + convertTimestamp(msg.time)
 189                 + "</span>"                                                     // end msgdate
 190                 + "</span>"                                                     // end header info on left side
 191                 + "<span class=\"ctdl-msg-header-buttons\">"                    // begin buttons on right side
 192
 193                 + "<span class=\"ctdl-msg-button\">"                            // Reply
 194                 + "<a href=\"javascript:open_reply_box('"+mdiv+"',false,'"+msg.wefw+"','"+msg.msgn+"');\">"
 195                 + "<i class=\"fa fa-reply\"></i> "
 196                 + _("Reply")
 197                 + "</a></span>"
 198
 199                 + "<span class=\"ctdl-msg-button\">"                            // ReplyQuoted
 200                 + "<a href=\"javascript:open_reply_box('"+mdiv+"',true,'"+msg.wefw+"','"+msg.msgn+"');\">"
 201                 + "<i class=\"fa fa-comment\"></i> "
 202                 + _("ReplyQuoted")
 203                 + "</a></span>";
 204
 205                 if (can_delete_messages) {
 206                         outmsg +=
 207                         "<span class=\"ctdl-msg-button\">"
 208                         + "<a href=\"javascript:forum_delete_message('"+mdiv+"','"+msg.msgnum+"');\">"
 209                         + "<i class=\"fa fa-trash\"></i> "
 210                         + _("Delete")
 211                         + "</a></span>";
 212                 }
 213
 214                 outmsg +=
 215                   "</span>";                                                    // end buttons on right side
 216                 if (msg.subj) {
 217                         outmsg +=
 218                         "<br><span class=\"ctdl-msgsubject\">" + msg.subj + "</span>";
 219                 }
 220                 outmsg +=
 221                   "</div><br>"                                                  // end header
 222                 + "<div class=\"ctdl-msg-body\" id=\"" + mdiv + "_body\">"      // begin body
 223                 + msg.text
 224                 + "</div>"                                                      // end body
 225                 + "</div>"                                                      // end content
 226                 + "</div>"                                                      // end wrapper
 227                 ;
 228         }
 229         catch(err) {
 230                 outmsg = "<div class=\"ctdl-msg-wrapper\">" + err.message + "</div>";
 231         }
 232
 233         div.innerHTML = outmsg;
 234         return(div);
 235 }
 236
 237
 238 // Compose a references string using existing references plus the message being replied to
 239 function compose_references(references, msgid) {
 240         if (references.includes("@")) {
 241                 refs = references + "|";
 242         }
 243         else {
 244                 refs = "";
 245         }
 246         refs += msgid;
 247
 248         // If the resulting string is too big, we can trim it here
 249         while (refs.length > 900) {
 250                 r = refs.split("|");
 251                 r.splice(1,1);          // remove the second element so we keep the root
 252                 refs = r.join("|");
 253         }
 254         return refs;
 255 }
 256
 257 // Delete a message.
 258 // We don't bother checking for permission because the button only appears if we have permission,
 259 // and even if someone hacks the client, the server will deny any unauthorized deletes.
 260 function forum_delete_message(message_div, message_number) {
 261         if (confirm(_("Delete this message?")) == true) {
 262                 async_forum_delete_message = async() => {
 263                         response = await fetch(
 264                                 "/ctdl/r/" + escapeHTMLURI(current_room) + "/" + message_number,
 265                                 { method: "DELETE" }
 266                         );
 267                         if (response.ok) {              // If the server accepted the delete, blank out the message div.
 268                                 document.getElementById(message_div).outerHTML = "";
 269                         }
 270                 }
 271                 async_forum_delete_message();
 272         }
 273 }
 274
 275
 276 // Open a reply box directly below a specific message
 277 function open_reply_box(parent_div, is_quoted, references, msgid) {
 278         let new_div = document.createElement("div");
 279         let new_div_name = randomString();
 280         new_div.id = new_div_name;
 281
 282         document.getElementById(parent_div).append(new_div);
 283
 284         replybox =
 285           "<div class=\"ctdl-msg-wrapper ctdl-msg-reply\">"             // begin message wrapper
 286         + "<div class=\"ctdl-avatar\">"                                 // begin avatar
 287         + "<img src=\"/ctdl/u/" + current_user + "/userpic\" width=\"32\" "
 288         + "onerror=\"this.parentNode.innerHTML='&lt;i class=&quot;fa fa-user-circle fa-2x&quot;&gt;&lt;/i&gt; '\">"
 289         + "</div>"                                                      // end avatar
 290         + "<div class=\"ctdl-msg-content\">"                            // begin content
 291         + "<div class=\"ctdl-msg-header\">"                             // begin header
 292         + "<span class=\"ctdl-msg-header-info\">"                       // begin header info on left side
 293         + "<span class=\"ctdl-username\">"
 294         + current_user                                                  // user = me !
 295         + "</span>"
 296         + "<span class=\"ctdl-msgdate\">"
 297         + convertTimestamp(Date.now() / 1000)                           // the current date/time (temporary for display)
 298         + "</span>"
 299         + "</span>"                                                     // end header info on left side
 300         + "<span class=\"ctdl-msg-header-buttons\">"                    // begin buttons on right side
 301
 302         + "<span class=\"ctdl-msg-button\">"                            // bold button
 303         + "<a href=\"javascript:void(0)\" onclick=\"forum_format('bold')\">"
 304         + "<i class=\"fa fa-bold fa-fw\"></i>"
 305         + "</a></span>"
 306
 307         + "<span class=\"ctdl-msg-button\">"                            // italic button
 308         + "<a href=\"javascript:void(0)\" onclick=\"forum_format('italic')\">"
 309         + "<i class=\"fa fa-italic fa-fw\"></i>"
 310         + "</a></span>"
 311
 312         + "<span class=\"ctdl-msg-button\">"                            // list button
 313         + "<a href=\"javascript:void(0)\" onclick=\"forum_format('insertunorderedlist')\">"
 314         + "<i class=\"fa fa-list fa-fw\"></i>"
 315         + "</a></span>"
 316
 317         + "<span class=\"ctdl-msg-button\">"                            // link button
 318         + "<a href=\"javascript:void(0)\" onclick=\"forum_display_urlbox()\">"
 319         + "<i class=\"fa fa-link fa-fw\"></i>"
 320         + "</a></span>"
 321
 322         + "</span>";                                                    // end buttons on right side
 323         //if (msg.subj) {
 324                 //replybox +=
 325                 //"<br><span id=\"ctdl-subject\" class=\"ctdl-msgsubject\">" + "FIXME subject" + "</span>";
 326         //}
 327         //else {                                                                // hidden filed for empty subject
 328                 replybox += "<span id=\"ctdl-subject\" style=\"display:none\"></span>";
 329         //}
 330         replybox +=
 331           "</div><br>"                                                  // end header
 332
 333         + "<span id=\"ctdl-replyreferences\" style=\"display:none\">"   // hidden field for references
 334         + compose_references(references,msgid) + "</span>"
 335                                                                         // begin body
 336         + "<div class=\"ctdl-msg-body\" id=\"ctdl-editor-body\" style=\"padding:5px;\" contenteditable=\"true\">"
 337         + "\n";                                                         // empty initial content
 338
 339         if (is_quoted) {
 340                 replybox += "<br><blockquote>"
 341                         + document.getElementById(parent_div+"_body").innerHTML
 342                         + "</blockquote>";
 343         }
 344
 345         replybox +=
 346           "</div>"                                                      // end body
 347
 348         + "<div class=\"ctdl-msg-header\">"                             // begin footer
 349         + "<span class=\"ctdl-msg-header-info\">"                       // begin footer info on left side
 350         + "&nbsp;"                                                      // (nothing here for now)
 351         + "</span>"                                                     // end footer info on left side
 352         + "<span class=\"ctdl-msg-header-buttons\">"                    // begin buttons on right side
 353
 354         + "<span class=\"ctdl-msg-button\"><a href=\"javascript:forum_save_message('" + new_div_name + "');\">"
 355         + "<i class=\"fa fa-check\" style=\"color:green\"></i> "        // save button
 356         + _("Post message")
 357         + "</a></span>"
 358
 359         + "<span class=\"ctdl-msg-button\"><a href=\"javascript:forum_cancel_post('" +  new_div_name + "');\">"
 360         + "<i class=\"fa fa-trash\" style=\"color:red\"></i> "          // cancel button
 361         + _("Cancel")
 362         + "</a></span>"
 363
 364         + "</span>"                                                     // end buttons on right side
 365         + "</div><br>"                                                  // end footer
 366
 367
 368         + "</div>"                                                      // end content
 369         + "</div>"                                                      // end wrapper
 370
 371         + "<div id=\"forum_url_entry_box\" class=\"w3-modal\">"         // begin URL entry modal
 372         + "     <div class=\"w3-modal-content w3-animate-top w3-card-4\">"
 373         + "             <header class=\"w3-container w3-blue\"> "
 374         + "                     <p><span>URL:</span></p>"
 375         + "             </header>"
 376         + "             <div class=\"w3-container w3-blue\">"
 377         + "                     <input id=\"forum_txtFormatUrl\" placeholder=\"http://\" style=\"width:100%\">"
 378         + "             </div>"
 379         + "             <footer class=\"w3-container w3-blue\">"
 380         + "                     <p><span class=\"ctdl-msg-button\"><a href=\"javascript:forum_close_urlbox(true);\">"
 381         + "                             <i class=\"fa fa-check\" style=\"color:green\"></i> "
 382         +                               _("Save")
 383         +                       "</a></span>"
 384         + "                     <span class=\"ctdl-msg-button\"><a href=\"javascript:forum_close_urlbox(false);\">"
 385         + "                             <i class=\"fa fa-trash\" style=\"color:red\"></i> "
 386         +                               _("Cancel")
 387         +                       "</a></span></p>"
 388         + "             </footer>"
 389         + "             </div>"
 390         + "     </div>"
 391         + "     <input id=\"forum_selection_start\" style=\"display:none\"></input>"    // hidden fields
 392         + "     <input id=\"forum_selection_end\" style=\"display:none\"></input>"      // to store selection range
 393         + "</div>"                                                      // end URL entry modal
 394         ;
 395
 396         document.getElementById(new_div_name).innerHTML = replybox;
 397         document.getElementById(new_div_name).scrollIntoView({behavior: "smooth", block: "end", inline: "nearest"});
 398
 399         // These actions must happen *after* the initial render loop completes.
 400         setTimeout(function() {
 401                 var tag = document.getElementById("ctdl-editor-body");
 402                 tag.focus();                                            // sets the focus
 403                 window.getSelection().collapse(tag.firstChild, 0);      // positions the cursor
 404         }, 0);
 405 }
 406
 407
 408 // Abort a message post (it simply destroys the div)
 409 function forum_cancel_post(div_name) {
 410         document.getElementById(div_name).outerHTML = "";               // make it cease to exist
 411 }
 412
 413
 414 // Save the posted message to the server
 415 function forum_save_message(editor_div_name) {
 416
 417         document.body.style.cursor = "wait";
 418         wefw = (document.getElementById("ctdl-replyreferences").innerHTML).replaceAll("|","!"); // references (if present)
 419         subj = document.getElementById("ctdl-subject").innerHTML;                               // subject (if present)
 420
 421         url = "/ctdl/r/" + escapeHTMLURI(current_room)
 422                 + "/dummy_name_for_new_message"
 423                 + "?wefw=" + wefw
 424                 + "&subj=" + subj
 425         boundary = randomString();
 426         body_text =
 427                 "--" + boundary + "\r\n"
 428                 + "Content-type: text/html\r\n"
 429                 + "Content-transfer-encoding: quoted-printable\r\n"
 430                 + "\r\n"
 431                 + quoted_printable_encode(
 432                         "<html><body>" + document.getElementById("ctdl-editor-body").innerHTML + "</body></html>"
 433                 ) + "\r\n"
 434                 + "--" + boundary + "--\r\n"
 435         ;
 436
 437         var request = new XMLHttpRequest();
 438         request.open("PUT", url, true);
 439         request.setRequestHeader("Content-type", "multipart/mixed; boundary=\"" + boundary + "\"");
 440         request.onreadystatechange = function() {
 441                 if (request.readyState == 4) {
 442                         document.body.style.cursor = "default";
 443                         if (Math.trunc(request.status / 100) == 2) {
 444                                 headers = request.getAllResponseHeaders().split("\n");
 445                                 for (var i in headers) {
 446                                         if (headers[i].startsWith("etag: ")) {
 447                                                 new_msg_num = headers[i].split(" ")[1];
 448                                         }
 449                                 }
 450
 451                                 // After saving the message, load it back from the server and replace the editor div with it.
 452                                 replace_editor_with_final_message = async() => {
 453                                         response = await fetch("/ctdl/r/" + escapeHTMLURI(current_room) + "/" + new_msg_num + "/json");
 454                                         if (response.ok) {
 455                                                 newly_posted_message = await(response.json());
 456                                                 forum_render_one(newly_posted_message, document.getElementById(editor_div_name));
 457                                         }
 458                                 }
 459                                 replace_editor_with_final_message();
 460
 461                         }
 462                         else {
 463                                 error_message = request.responseText;
 464                                 if (error_message.length == 0) {
 465                                         error_message = _("An error has occurred.");
 466                                 }
 467                                 alert(error_message);                                           // editor remains open
 468                         }
 469                 }
 470         };
 471         request.send(body_text);
 472 }
 473
 474
 475 // Bold, italics, etc.
 476 function forum_format(command, value) {
 477         document.execCommand(command, false, value);
 478 }
 479
 480
 481 // Make the URL entry box appear.
 482 // When the user clicks into the URL box it will make the previous focus disappear, so we have to save it.
 483 function forum_display_urlbox() {
 484         document.getElementById("forum_selection_start").value = window.getSelection().anchorOffset;
 485         document.getElementById("forum_selection_end").value = window.getSelection().focusOffset;
 486         document.getElementById("forum_url_entry_box").style.display = "block";
 487 }
 488
 489
 490 // When the URL box is closed, this gets called.  do_save is true for Save, false for Cancel.
 491 function forum_close_urlbox(do_save) {
 492         if (do_save) {
 493                 var tag = document.getElementById("ctdl-editor-body");
 494                 var start_replace = document.getElementById("forum_selection_start").value;     // use saved selection range
 495                 var end_replace = document.getElementById("forum_selection_end").value;
 496                 new_text = tag.innerHTML.substring(0, start_replace)
 497                         + "<a href=\"" + document.getElementById("forum_txtFormatUrl").value + "\">"
 498                         + tag.innerHTML.substring(start_replace, end_replace)
 499                         + "</a>"
 500                         + tag.innerHTML.substring(end_replace);
 501                 tag.innerHTML = new_text;
 502         }
 503         document.getElementById("forum_txtFormatUrl").value = "";                               // clear url box for next time
 504         document.getElementById("forum_url_entry_box").style.display = "none";
 505 }
 506
 507
 508 // User has clicked the "Post message" button.  This is roughly the same as "reply" except there is no parent message.
 509 function forum_entmsg() {
 510         open_reply_box("ctdl-newmsg-here", false, "", "");
 511 }