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