webcit-ng/static/js/view_forum.js

   1 // Copyright (c) 2016-2021 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                 "<div class=\"ctdl-forum-nav\"><i class=\"fas fa-spinner fa-spin\"></i>&nbsp;&nbsp;"
  20                 + _("Loading messages from server, please wait") + "</div>";
  21
  22         if (lt_msg < 9999999999) {
  23                 url = "/ctdl/r/" + escapeHTMLURI(current_room) + "/msgs.lt|" + lt_msg;
  24         }
  25         else {
  26                 url = "/ctdl/r/" + escapeHTMLURI(current_room) + "/msgs.gt|" + gt_msg;
  27         }
  28
  29         fetch_msg_list = async() => {
  30                 response = await fetch(url);
  31                 msgs = await(response.json());
  32                 if (response.ok) {
  33                         target_div.innerHTML = "" ;
  34
  35                         // If we were given an explicit starting point, by all means start there.
  36                         // Note that we don't have to remove them from the array because we did a 'msgs gt|xxx' command to Citadel.
  37                         if (gt_msg > 0) {
  38                                 msgs = msgs.slice(0, messages_per_page);
  39                         }
  40
  41                         // Otherwise, show us the last 20 messages
  42                         else {
  43                                 if (msgs.length > messages_per_page) {
  44                                         msgs = msgs.slice(msgs.length - messages_per_page);
  45                                 }
  46                                 new_old_div_name = randomString(10);
  47                                 if (msgs.length < 1) {
  48                                         newlt = lt_msg;
  49                                 }
  50                                 else {
  51                                         newlt = msgs[0];
  52                                 }
  53                                 target_div.innerHTML +=
  54                                         "<div id=\"" + new_old_div_name + "\">" +
  55                                         "<div class=\"ctdl-forum-nav\">" +
  56                                         "<a href=\"javascript:forum_readmessages('" + new_old_div_name + "', 0, " + newlt + ");\">" +
  57                                         "<i class=\"fa fa-arrow-circle-up\"></i>&nbsp;&nbsp;" +
  58                                         _("Older posts") + "&nbsp;&nbsp;<i class=\"fa fa-arrow-circle-up\"></a></div></div></a></div></div>" ;
  59                         }
  60
  61                         // The messages will go here.
  62                         let msgs_div_name = randomString(10);
  63                         target_div.innerHTML += "<div id=\"" + msgs_div_name + "\"> </div>" ;
  64
  65                         if (lt_msg == 9999999999) {
  66                                 new_new_div_name = randomString(10);
  67                                 if (msgs.length <= 0) {
  68                                         newgt = gt_msg;
  69                                 }
  70                                 else {
  71                                         newgt = msgs[msgs.length-1];
  72                                 }
  73                                 target_div.innerHTML +=
  74                                         "<div id=\"" + new_new_div_name + "\">" +
  75                                         "<div class=\"ctdl-forum-nav\">" +
  76                                         "<a href=\"javascript:forum_readmessages('" + new_new_div_name + "', " + newgt + ", 9999999999);\">" +
  77                                         "<i class=\"fa fa-arrow-circle-down\"></i>&nbsp;&nbsp;" +
  78                                         _("Newer posts") + "&nbsp;&nbsp;<i class=\"fa fa-arrow-circle-down\"></a></div></div>" ;
  79                         }
  80
  81                         // Now figure out where to scroll to after rendering.
  82                         if (gt_msg > 0) {
  83                                 scroll_to = msgs[0];
  84                         }
  85                         else if (lt_msg < 9999999999) {
  86                                 scroll_to = msgs[msgs.length-1];
  87                         }
  88                         else if ( (logged_in) && (gt_msg == 0) && (lt_msg == 9999999999) ) {
  89                                 scroll_to = msgs[msgs.length-1];
  90                         }
  91                         else {
  92                                 scroll_to = msgs[0];            // FIXME this is too naive
  93                         }
  94
  95                         // Render the individual messages in the divs
  96                         forum_render_messages(msgs, msgs_div_name, scroll_to)
  97                 }
  98                 else {
  99                         // if xhr fails, this will make the link reappear so the user can try again
 100                         target_div.innerHTML = original_text;
 101                 }
 102         }
 103         fetch_msg_list();
 104 }
 105
 106
 107 // Render a range of messages into the specified target div
 108 function forum_render_messages(message_numbers, msgs_div_name, scroll_to) {
 109
 110         // Build an array of Promises and then wait for them all to resolve.
 111         let num_msgs = message_numbers.length;
 112         let msg_promises = Array.apply(null, Array(num_msgs));
 113         for (i=0; i<num_msgs; ++i) {
 114                 msg_promises[i] = fetch("/ctdl/r/" + escapeHTMLURI(current_room) + "/" + message_numbers[i] + "/json")
 115                         .then(response => response.json())
 116                         .catch((error) => {
 117                                 response => null;
 118                                 console.error('Error: ', error);
 119                         })
 120                 ;
 121         }
 122
 123         // Here is the async function that waits for all the messages to be loaded, and then renders them.
 124         fetch_msg_list = async() => {
 125                 document.body.style.cursor = "wait";
 126                 await Promise.all(msg_promises);
 127                 document.body.style.cursor = "default";
 128
 129                 // At this point all of the Promises are resolved and we can render.
 130                 // Note: "let" keeps "i" in scope even through the .then scope
 131                 let scroll_to_div = null;
 132                 for (let i=0; i<num_msgs; ++i) {
 133                         msg_promises[i].then((one_message) => {
 134                                 let new_msg_div = forum_render_one(one_message);
 135                                 document.getElementById(msgs_div_name).append(new_msg_div);
 136                                 if (message_numbers[i] == scroll_to) {
 137                                         scroll_to_div = new_msg_div;
 138                                 }
 139                                 if (i == num_msgs - 1) {
 140                                         scroll_to_div.scrollIntoView({behavior: "smooth", block: "start", inline: "nearest"});
 141                                 }
 142                         });
 143                 }
 144         }
 145
 146         fetch_msg_list();
 147 }
 148
 149
 150 // Render a message.  Returns a div object.
 151 function forum_render_one(msg) {
 152
 153         let div = document.createElement("div");
 154         mdiv = randomString(10);                                        // div name for this message
 155         div.id = mdiv;
 156
 157         try {
 158                 outmsg =
 159                   "<div class=\"ctdl-msg-wrapper\">"                            // begin message wrapper
 160                 + "<div class=\"ctdl-avatar\">"                                 // begin avatar
 161                 + "<img src=\"/ctdl/u/" + msg.from + "/userpic\" width=\"32\" "
 162                 + "onerror=\"this.parentNode.innerHTML='&lt;i class=&quot;fa fa-user-circle fa-2x&quot;&gt;&lt;/i&gt; '\">"
 163                 + "</div>"                                                      // end avatar
 164                 + "<div class=\"ctdl-msg-content\">"                            // begin content
 165                 + "<div class=\"ctdl-msg-header\">"                             // begin header
 166                 + "<span class=\"ctdl-msg-header-info\">"                       // begin header info on left side
 167                 + "<span class=\"ctdl-username\"><a href=\"#\">"                // FIXME link to user profile
 168                 + msg.from
 169                 + "</a></span>"                                                 // end username
 170                 + "<span class=\"ctdl-msgdate\">"
 171                 + msg.time
 172                 + "</span>"                                                     // end msgdate
 173                 + "</span>"                                                     // end header info on left side
 174                 + "<span class=\"ctdl-msg-header-buttons\">"                    // begin buttons on right side
 175
 176                 + "<span class=\"ctdl-msg-button\">"                            // Reply
 177                 + "<a href=\"javascript:open_reply_box('"+mdiv+"',false,'"+msg.wefw+"','"+msg.msgn+"');\">"
 178                 + "<i class=\"fa fa-reply\"></i> "
 179                 + _("Reply")
 180                 + "</a></span>"
 181
 182                 + "<span class=\"ctdl-msg-button\">"                            // ReplyQuoted
 183                 + "<a href=\"javascript:open_reply_box('"+mdiv+"',true,'"+msg.wefw+"','"+msg.msgn+"');\">"
 184                 + "<i class=\"fa fa-comment\"></i> "
 185                 + _("ReplyQuoted")
 186                 + "</a></span>"
 187
 188                 + "<span class=\"ctdl-msg-button\"><a href=\"#\">"              // Delete , show only with permission FIXME
 189                 + "<i class=\"fa fa-trash\"></i> "
 190                 + _("Delete")
 191                 + "</a></span>"
 192
 193                 + "</span>";                                                    // end buttons on right side
 194                 if (msg.subj) {
 195                         outmsg +=
 196                         "<br><span class=\"ctdl-msgsubject\">" + msg.subj + "</span>";
 197                 }
 198                 outmsg +=
 199                   "</div><br>"                                                  // end header
 200                 + "<div class=\"ctdl-msg-body\">"                               // begin body
 201                 + msg.text
 202                 + "</div>"                                                      // end body
 203                 + "</div>"                                                      // end content
 204                 + "</div>"                                                      // end wrapper
 205                 ;
 206         }
 207         catch(err) {
 208                 outmsg = "<div class=\"ctdl-msg-wrapper\">" + err.message + "</div>";
 209         }
 210
 211         div.innerHTML = outmsg;
 212         return(div);
 213 }
 214
 215
 216 // Compose a references string using existing references plus the message being replied to
 217 function compose_references(references, msgid) {
 218         if (references.includes("@")) {
 219                 refs = references + "|";
 220         }
 221         else {
 222                 refs = "";
 223         }
 224         refs += msgid;
 225
 226         // If the resulting string is too big, we can trim it here
 227         while (refs.length > 900) {
 228                 r = refs.split("|");
 229                 r.splice(1,1);          // remove the second element so we keep the root
 230                 refs = r.join("|");
 231         }
 232         return refs;
 233 }
 234
 235
 236 // Open a reply box directly below a specific message
 237 function open_reply_box(parent_div, is_quoted, references, msgid) {
 238         let new_div = document.createElement("div");
 239         let new_div_name = randomString(10);
 240         new_div.id = new_div_name;
 241
 242         document.getElementById(parent_div).append(new_div);
 243
 244         replybox =
 245           "<div class=\"ctdl-msg-wrapper ctdl-msg-reply\">"             // begin message wrapper
 246         + "<div class=\"ctdl-avatar\">"                                 // begin avatar
 247         + "<img src=\"/ctdl/u/" + "FIXME my name" + "/userpic\" width=\"32\" "
 248         + "onerror=\"this.parentNode.innerHTML='&lt;i class=&quot;fa fa-user-circle fa-2x&quot;&gt;&lt;/i&gt; '\">"
 249         + "</div>"                                                      // end avatar
 250         + "<div class=\"ctdl-msg-content\">"                            // begin content
 251         + "<div class=\"ctdl-msg-header\">"                             // begin header
 252         + "<span class=\"ctdl-msg-header-info\">"                       // begin header info on left side
 253         + "<span class=\"ctdl-username\"><a href=\"#\">"                // FIXME link to user profile
 254         + "FIXME my name"
 255         + "</a></span>"                                                 // end username
 256         + "<span class=\"ctdl-msgdate\">"
 257         + "FIXME now time"
 258         + "</span>"                                                     // end msgdate
 259         + "</span>"                                                     // end header info on left side
 260         + "<span class=\"ctdl-msg-header-buttons\">"                    // begin buttons on right side
 261
 262         + "<span class=\"ctdl-msg-button\">"                            // bold button
 263         + "<a href=\"javascript:void(0)\" onclick=\"forum_format('bold')\">"
 264         + "<i class=\"fa fa-bold fa-fw\"></i>"
 265         + "</a></span>"
 266
 267         + "<span class=\"ctdl-msg-button\">"                            // italic button
 268         + "<a href=\"javascript:void(0)\" onclick=\"forum_format('italic')\">"
 269         + "<i class=\"fa fa-italic fa-fw\"></i>"
 270         + "</a></span>"
 271
 272         + "<span class=\"ctdl-msg-button\">"                            // list button
 273         + "<a href=\"javascript:void(0)\" onclick=\"forum_format('insertunorderedlist')\">"
 274         + "<i class=\"fa fa-list fa-fw\"></i>"
 275         + "</a></span>"
 276
 277         + "<span class=\"ctdl-msg-button\">"                            // link button
 278         + "<a href=\"javascript:void(0)\" onclick=\"forum_display_urlbox()\">"
 279         + "<i class=\"fa fa-link fa-fw\"></i>"
 280         + "</a></span>"
 281
 282         + "</span>";                                                    // end buttons on right side
 283         //if (msg.subj) {
 284                 //replybox +=
 285                 //"<br><span id=\"ctdl-subject\" class=\"ctdl-msgsubject\">" + "FIXME subject" + "</span>";
 286         //}
 287         //else {                                                                // hidden filed for empty subject
 288                 replybox += "<span id=\"ctdl-subject\" style=\"display:none\"></span>";
 289         //}
 290         replybox +=
 291           "</div><br>"                                                  // end header
 292
 293         + "<span id=\"ctdl-replyreferences\" style=\"display:none\">"   // hidden field for references
 294         + compose_references(references,msgid) + "</span>"
 295                                                                         // begin body
 296         + "<div class=\"ctdl-msg-body\" id=\"ctdl-editor-body\" style=\"padding:5px;\" contenteditable=\"true\">"
 297         + "\n"                                                          // empty initial content
 298         + "</div>"                                                      // end body
 299
 300         + "<div class=\"ctdl-msg-header\">"                             // begin footer
 301         + "<span class=\"ctdl-msg-header-info\">"                       // begin footer info on left side
 302         + "x"
 303         + "</span>"                                                     // end footer info on left side
 304         + "<span class=\"ctdl-msg-header-buttons\">"                    // begin buttons on right side
 305
 306         + "<span class=\"ctdl-msg-button\"><a href=\"javascript:forum_save_message('" + new_div_name + "');\">"
 307         + "<i class=\"fa fa-check\" style=\"color:green\"></i> "        // save button
 308         + _("Post message")
 309         + "</a></span>"
 310
 311         + "<span class=\"ctdl-msg-button\"><a href=\"javascript:forum_cancel_post('" +  new_div_name + "');\">"
 312         + "<i class=\"fa fa-trash\" style=\"color:red\"></i> "          // cancel button
 313         + _("Cancel")
 314         + "</a></span>"
 315
 316         + "</span>"                                                     // end buttons on right side
 317         + "</div><br>"                                                  // end footer
 318
 319
 320         + "</div>"                                                      // end content
 321         + "</div>"                                                      // end wrapper
 322
 323         + "<div id=\"forum_url_entry_box\" class=\"w3-modal\">"         // begin URL entry modal
 324         + "     <div class=\"w3-modal-content w3-animate-top w3-card-4\">"
 325         + "             <header class=\"w3-container w3-blue\"> "
 326         + "                     <p><span>URL:</span></p>"
 327         + "             </header>"
 328         + "             <div class=\"w3-container w3-blue\">"
 329         + "                     <input id=\"forum_txtFormatUrl\" placeholder=\"http://\" style=\"width:100%\">"
 330         + "             </div>"
 331         + "             <footer class=\"w3-container w3-blue\">"
 332         + "                     <p><span class=\"ctdl-msg-button\"><a href=\"javascript:forum_close_urlbox(true);\">"
 333         + "                             <i class=\"fa fa-check\" style=\"color:green\"></i> "
 334         +                               _("Save")
 335         +                       "</a></span>"
 336         + "                     <span class=\"ctdl-msg-button\"><a href=\"javascript:forum_close_urlbox(false);\">"
 337         + "                             <i class=\"fa fa-trash\" style=\"color:red\"></i> "
 338         +                               _("Cancel")
 339         +                       "</a></span></p>"
 340         + "             </footer>"
 341         + "             </div>"
 342         + "     </div>"
 343         + "     <input id=\"forum_selection_start\" style=\"display:none\"></input>"    // hidden fields
 344         + "     <input id=\"forum_selection_end\" style=\"display:none\"></input>"      // to store selection range
 345         + "</div>"                                                      // end URL entry modal
 346         ;
 347
 348         document.getElementById(new_div_name).innerHTML = replybox;
 349         document.getElementById(new_div_name).scrollIntoView({behavior: "smooth", block: "end", inline: "nearest"});
 350
 351         // These actions must happen *after* the initial render loop completes.
 352         setTimeout(function() {
 353                 var tag = document.getElementById("ctdl-editor-body");
 354                 tag.focus();                                            // sets the focus
 355                 window.getSelection().collapse(tag.firstChild, 0);      // positions the cursor
 356         }, 0);
 357 }
 358
 359
 360 // Abort a message post (it simply destroys the div)
 361 function forum_cancel_post(div_name) {
 362         document.getElementById(div_name).outerHTML = "";               // make it cease to exist
 363 }
 364
 365
 366 // Save the posted message to the server
 367 function forum_save_message(editor_div_name) {
 368
 369         document.body.style.cursor = "wait";
 370         wefw = (document.getElementById("ctdl-replyreferences").innerHTML).replaceAll("|","!"); // references (if present)
 371         subj = document.getElementById("ctdl-subject").innerHTML;                               // subject (if present)
 372
 373         url = "/ctdl/r/" + escapeHTMLURI(current_room)
 374                 + "/dummy_name_for_new_message"
 375                 + "?wefw=" + wefw
 376                 + "&subj=" + subj
 377         boundary = randomString(20);
 378         body_text =
 379                 "--" + boundary + "\r\n"
 380                 + "Content-type: text/html\r\n"
 381                 + "Content-transfer-encoding: quoted-printable\r\n"
 382                 + "\r\n"
 383                 + quoted_printable_encode(
 384                         "<html><body>" + document.getElementById("ctdl-editor-body").innerHTML + "</body></html>"
 385                 ) + "\r\n"
 386                 + "--" + boundary + "--\r\n"
 387         ;
 388
 389         var request = new XMLHttpRequest();
 390         request.open("PUT", url, true);
 391         request.setRequestHeader("Content-type", "multipart/mixed; boundary=\"" + boundary + "\"");
 392         request.onreadystatechange = function() {
 393                 if (request.readyState == 4) {
 394                         document.body.style.cursor = "default";
 395                         if (Math.trunc(request.status / 100) == 2) {
 396                                 headers = request.getAllResponseHeaders().split("\n");
 397                                 for (var i in headers) {
 398                                         if (headers[i].startsWith("etag: ")) {
 399                                                 new_msg_num = headers[i].split(" ")[1];
 400                                         }
 401                                 }
 402
 403                                 // change the name of the editor div to make it look like a regular message...
 404                                 document.getElementById(editor_div_name).innerHTML = "FIXME render message " + new_msg_num;
 405                         }
 406                         else {
 407                                 error_message = request.responseText;
 408                                 if (error_message.length == 0) {
 409                                         error_message = _("An error has occurred.");
 410                                 }
 411                                 alert(error_message);                                           // editor remains open
 412                         }
 413                 }
 414         };
 415         request.send(body_text);
 416 }
 417
 418
 419 // Bold, italics, etc.
 420 function forum_format(command, value) {
 421         document.execCommand(command, false, value);
 422 }
 423
 424
 425 // Make the URL entry box appear.
 426 // When the user clicks into the URL box it will make the previous focus disappear, so we have to save it.
 427 function forum_display_urlbox() {
 428         document.getElementById("forum_selection_start").value = window.getSelection().anchorOffset;
 429         document.getElementById("forum_selection_end").value = window.getSelection().focusOffset;
 430         document.getElementById("forum_url_entry_box").style.display = "block";
 431 }
 432
 433
 434 // When the URL box is closed, this gets called.  do_save is true for Save, false for Cancel.
 435 function forum_close_urlbox(do_save) {
 436         if (do_save) {
 437                 var tag = document.getElementById("ctdl-editor-body");
 438                 var start_replace = document.getElementById("forum_selection_start").value;     // use saved selection range
 439                 var end_replace = document.getElementById("forum_selection_end").value;
 440                 new_text = tag.innerHTML.substring(0, start_replace)
 441                         + "<a href=\"" + document.getElementById("forum_txtFormatUrl").value + "\">"
 442                         + tag.innerHTML.substring(start_replace, end_replace)
 443                         + "</a>"
 444                         + tag.innerHTML.substring(end_replace);
 445                 tag.innerHTML = new_text;
 446         }
 447         document.getElementById("forum_txtFormatUrl").value = "";                               // clear url box for next time
 448         document.getElementById("forum_url_entry_box").style.display = "none";
 449 }