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