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                 + "<span class=\"ctdl-msg-button\"><a href=\"#\">"              // Delete , show only with permission FIXME
 206                 + "<i class=\"fa fa-trash\"></i> "
 207                 + _("Delete")
 208                 + "</a></span>"
 209
 210                 + "</span>";                                                    // end buttons on right side
 211                 if (msg.subj) {
 212                         outmsg +=
 213                         "<br><span class=\"ctdl-msgsubject\">" + msg.subj + "</span>";
 214                 }
 215                 outmsg +=
 216                   "</div><br>"                                                  // end header
 217                 + "<div class=\"ctdl-msg-body\" id=\"" + mdiv + "_body\">"      // begin body
 218                 + msg.text
 219                 + "</div>"                                                      // end body
 220                 + "</div>"                                                      // end content
 221                 + "</div>"                                                      // end wrapper
 222                 ;
 223         }
 224         catch(err) {
 225                 outmsg = "<div class=\"ctdl-msg-wrapper\">" + err.message + "</div>";
 226         }
 227
 228         div.innerHTML = outmsg;
 229         return(div);
 230 }
 231
 232
 233 // Compose a references string using existing references plus the message being replied to
 234 function compose_references(references, msgid) {
 235         if (references.includes("@")) {
 236                 refs = references + "|";
 237         }
 238         else {
 239                 refs = "";
 240         }
 241         refs += msgid;
 242
 243         // If the resulting string is too big, we can trim it here
 244         while (refs.length > 900) {
 245                 r = refs.split("|");
 246                 r.splice(1,1);          // remove the second element so we keep the root
 247                 refs = r.join("|");
 248         }
 249         return refs;
 250 }
 251
 252
 253 // Open a reply box directly below a specific message
 254 function open_reply_box(parent_div, is_quoted, references, msgid) {
 255         let new_div = document.createElement("div");
 256         let new_div_name = randomString();
 257         new_div.id = new_div_name;
 258
 259         document.getElementById(parent_div).append(new_div);
 260
 261         replybox =
 262           "<div class=\"ctdl-msg-wrapper ctdl-msg-reply\">"             // begin message wrapper
 263         + "<div class=\"ctdl-avatar\">"                                 // begin avatar
 264         + "<img src=\"/ctdl/u/" + current_user + "/userpic\" width=\"32\" "
 265         + "onerror=\"this.parentNode.innerHTML='&lt;i class=&quot;fa fa-user-circle fa-2x&quot;&gt;&lt;/i&gt; '\">"
 266         + "</div>"                                                      // end avatar
 267         + "<div class=\"ctdl-msg-content\">"                            // begin content
 268         + "<div class=\"ctdl-msg-header\">"                             // begin header
 269         + "<span class=\"ctdl-msg-header-info\">"                       // begin header info on left side
 270         + "<span class=\"ctdl-username\">"
 271         + current_user                                                  // user = me !
 272         + "</span>"
 273         + "<span class=\"ctdl-msgdate\">"
 274         + convertTimestamp(Date.now() / 1000)                           // the current date/time (temporary for display)
 275         + "</span>"
 276         + "</span>"                                                     // end header info on left side
 277         + "<span class=\"ctdl-msg-header-buttons\">"                    // begin buttons on right side
 278
 279         + "<span class=\"ctdl-msg-button\">"                            // bold button
 280         + "<a href=\"javascript:void(0)\" onclick=\"forum_format('bold')\">"
 281         + "<i class=\"fa fa-bold fa-fw\"></i>"
 282         + "</a></span>"
 283
 284         + "<span class=\"ctdl-msg-button\">"                            // italic button
 285         + "<a href=\"javascript:void(0)\" onclick=\"forum_format('italic')\">"
 286         + "<i class=\"fa fa-italic fa-fw\"></i>"
 287         + "</a></span>"
 288
 289         + "<span class=\"ctdl-msg-button\">"                            // list button
 290         + "<a href=\"javascript:void(0)\" onclick=\"forum_format('insertunorderedlist')\">"
 291         + "<i class=\"fa fa-list fa-fw\"></i>"
 292         + "</a></span>"
 293
 294         + "<span class=\"ctdl-msg-button\">"                            // link button
 295         + "<a href=\"javascript:void(0)\" onclick=\"forum_display_urlbox()\">"
 296         + "<i class=\"fa fa-link fa-fw\"></i>"
 297         + "</a></span>"
 298
 299         + "</span>";                                                    // end buttons on right side
 300         //if (msg.subj) {
 301                 //replybox +=
 302                 //"<br><span id=\"ctdl-subject\" class=\"ctdl-msgsubject\">" + "FIXME subject" + "</span>";
 303         //}
 304         //else {                                                                // hidden filed for empty subject
 305                 replybox += "<span id=\"ctdl-subject\" style=\"display:none\"></span>";
 306         //}
 307         replybox +=
 308           "</div><br>"                                                  // end header
 309
 310         + "<span id=\"ctdl-replyreferences\" style=\"display:none\">"   // hidden field for references
 311         + compose_references(references,msgid) + "</span>"
 312                                                                         // begin body
 313         + "<div class=\"ctdl-msg-body\" id=\"ctdl-editor-body\" style=\"padding:5px;\" contenteditable=\"true\">"
 314         + "\n";                                                         // empty initial content
 315
 316         if (is_quoted) {
 317                 replybox += "<br><blockquote>"
 318                         + document.getElementById(parent_div+"_body").innerHTML
 319                         + "</blockquote>";
 320         }
 321
 322         replybox +=
 323           "</div>"                                                      // end body
 324
 325         + "<div class=\"ctdl-msg-header\">"                             // begin footer
 326         + "<span class=\"ctdl-msg-header-info\">"                       // begin footer info on left side
 327         + "&nbsp;"                                                      // (nothing here for now)
 328         + "</span>"                                                     // end footer info on left side
 329         + "<span class=\"ctdl-msg-header-buttons\">"                    // begin buttons on right side
 330
 331         + "<span class=\"ctdl-msg-button\"><a href=\"javascript:forum_save_message('" + new_div_name + "');\">"
 332         + "<i class=\"fa fa-check\" style=\"color:green\"></i> "        // save button
 333         + _("Post message")
 334         + "</a></span>"
 335
 336         + "<span class=\"ctdl-msg-button\"><a href=\"javascript:forum_cancel_post('" +  new_div_name + "');\">"
 337         + "<i class=\"fa fa-trash\" style=\"color:red\"></i> "          // cancel button
 338         + _("Cancel")
 339         + "</a></span>"
 340
 341         + "</span>"                                                     // end buttons on right side
 342         + "</div><br>"                                                  // end footer
 343
 344
 345         + "</div>"                                                      // end content
 346         + "</div>"                                                      // end wrapper
 347
 348         + "<div id=\"forum_url_entry_box\" class=\"w3-modal\">"         // begin URL entry modal
 349         + "     <div class=\"w3-modal-content w3-animate-top w3-card-4\">"
 350         + "             <header class=\"w3-container w3-blue\"> "
 351         + "                     <p><span>URL:</span></p>"
 352         + "             </header>"
 353         + "             <div class=\"w3-container w3-blue\">"
 354         + "                     <input id=\"forum_txtFormatUrl\" placeholder=\"http://\" style=\"width:100%\">"
 355         + "             </div>"
 356         + "             <footer class=\"w3-container w3-blue\">"
 357         + "                     <p><span class=\"ctdl-msg-button\"><a href=\"javascript:forum_close_urlbox(true);\">"
 358         + "                             <i class=\"fa fa-check\" style=\"color:green\"></i> "
 359         +                               _("Save")
 360         +                       "</a></span>"
 361         + "                     <span class=\"ctdl-msg-button\"><a href=\"javascript:forum_close_urlbox(false);\">"
 362         + "                             <i class=\"fa fa-trash\" style=\"color:red\"></i> "
 363         +                               _("Cancel")
 364         +                       "</a></span></p>"
 365         + "             </footer>"
 366         + "             </div>"
 367         + "     </div>"
 368         + "     <input id=\"forum_selection_start\" style=\"display:none\"></input>"    // hidden fields
 369         + "     <input id=\"forum_selection_end\" style=\"display:none\"></input>"      // to store selection range
 370         + "</div>"                                                      // end URL entry modal
 371         ;
 372
 373         document.getElementById(new_div_name).innerHTML = replybox;
 374         document.getElementById(new_div_name).scrollIntoView({behavior: "smooth", block: "end", inline: "nearest"});
 375
 376         // These actions must happen *after* the initial render loop completes.
 377         setTimeout(function() {
 378                 var tag = document.getElementById("ctdl-editor-body");
 379                 tag.focus();                                            // sets the focus
 380                 window.getSelection().collapse(tag.firstChild, 0);      // positions the cursor
 381         }, 0);
 382 }
 383
 384
 385 // Abort a message post (it simply destroys the div)
 386 function forum_cancel_post(div_name) {
 387         document.getElementById(div_name).outerHTML = "";               // make it cease to exist
 388 }
 389
 390
 391 // Save the posted message to the server
 392 function forum_save_message(editor_div_name) {
 393
 394         document.body.style.cursor = "wait";
 395         wefw = (document.getElementById("ctdl-replyreferences").innerHTML).replaceAll("|","!"); // references (if present)
 396         subj = document.getElementById("ctdl-subject").innerHTML;                               // subject (if present)
 397
 398         url = "/ctdl/r/" + escapeHTMLURI(current_room)
 399                 + "/dummy_name_for_new_message"
 400                 + "?wefw=" + wefw
 401                 + "&subj=" + subj
 402         boundary = randomString();
 403         body_text =
 404                 "--" + boundary + "\r\n"
 405                 + "Content-type: text/html\r\n"
 406                 + "Content-transfer-encoding: quoted-printable\r\n"
 407                 + "\r\n"
 408                 + quoted_printable_encode(
 409                         "<html><body>" + document.getElementById("ctdl-editor-body").innerHTML + "</body></html>"
 410                 ) + "\r\n"
 411                 + "--" + boundary + "--\r\n"
 412         ;
 413
 414         var request = new XMLHttpRequest();
 415         request.open("PUT", url, true);
 416         request.setRequestHeader("Content-type", "multipart/mixed; boundary=\"" + boundary + "\"");
 417         request.onreadystatechange = function() {
 418                 if (request.readyState == 4) {
 419                         document.body.style.cursor = "default";
 420                         if (Math.trunc(request.status / 100) == 2) {
 421                                 headers = request.getAllResponseHeaders().split("\n");
 422                                 for (var i in headers) {
 423                                         if (headers[i].startsWith("etag: ")) {
 424                                                 new_msg_num = headers[i].split(" ")[1];
 425                                         }
 426                                 }
 427
 428                                 // After saving the message, load it back from the server and replace the editor div with it.
 429                                 replace_editor_with_final_message = async() => {
 430                                         response = await fetch("/ctdl/r/" + escapeHTMLURI(current_room) + "/" + new_msg_num + "/json");
 431                                         if (response.ok) {
 432                                                 newly_posted_message = await(response.json());
 433                                                 forum_render_one(newly_posted_message, document.getElementById(editor_div_name));
 434                                         }
 435                                 }
 436                                 replace_editor_with_final_message();
 437
 438                         }
 439                         else {
 440                                 error_message = request.responseText;
 441                                 if (error_message.length == 0) {
 442                                         error_message = _("An error has occurred.");
 443                                 }
 444                                 alert(error_message);                                           // editor remains open
 445                         }
 446                 }
 447         };
 448         request.send(body_text);
 449 }
 450
 451
 452 // Bold, italics, etc.
 453 function forum_format(command, value) {
 454         document.execCommand(command, false, value);
 455 }
 456
 457
 458 // Make the URL entry box appear.
 459 // When the user clicks into the URL box it will make the previous focus disappear, so we have to save it.
 460 function forum_display_urlbox() {
 461         document.getElementById("forum_selection_start").value = window.getSelection().anchorOffset;
 462         document.getElementById("forum_selection_end").value = window.getSelection().focusOffset;
 463         document.getElementById("forum_url_entry_box").style.display = "block";
 464 }
 465
 466
 467 // When the URL box is closed, this gets called.  do_save is true for Save, false for Cancel.
 468 function forum_close_urlbox(do_save) {
 469         if (do_save) {
 470                 var tag = document.getElementById("ctdl-editor-body");
 471                 var start_replace = document.getElementById("forum_selection_start").value;     // use saved selection range
 472                 var end_replace = document.getElementById("forum_selection_end").value;
 473                 new_text = tag.innerHTML.substring(0, start_replace)
 474                         + "<a href=\"" + document.getElementById("forum_txtFormatUrl").value + "\">"
 475                         + tag.innerHTML.substring(start_replace, end_replace)
 476                         + "</a>"
 477                         + tag.innerHTML.substring(end_replace);
 478                 tag.innerHTML = new_text;
 479         }
 480         document.getElementById("forum_txtFormatUrl").value = "";                               // clear url box for next time
 481         document.getElementById("forum_url_entry_box").style.display = "none";
 482 }
 483
 484
 485 // User has clicked the "Post message" button.  This is roughly the same as "reply" except there is no parent message.
 486 function forum_entmsg() {
 487         open_reply_box("ctdl-newmsg-here", false, "", "");
 488 }