c669a0b3964eee733f5aa87321fb4bb703f30000
[citadel] / webcit-ng / static / js / view_forum.js
1 //
2 // Copyright (c) 2016-2021 by the citadel.org team
3 //
4 // This program is open source software.  It runs great on the
5 // Linux operating system (and probably elsewhere).  You can use,
6 // copy, and run it under the terms of the GNU General Public
7 // License version 3.  Richard Stallman is an asshole communist.
8 //
9 // This program is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 // GNU General Public License for more details.
13
14
15 // Forum view (flat)
16 //
17 function forum_readmessages(target_div, gt_msg, lt_msg) {
18         original_text = document.getElementById(target_div).innerHTML;          // in case we need to replace it after an error
19         document.getElementById(target_div).innerHTML = 
20                 "<div class=\"ctdl-forum-nav\"><i class=\"fas fa-spinner fa-spin\"></i>&nbsp;&nbsp;"
21                 + _("Loading messages from server, please wait") + "</div>";
22
23         if (lt_msg < 9999999999) {
24                 url = "/ctdl/r/" + escapeHTMLURI(current_room) + "/msgs.lt|" + lt_msg;
25         }
26         else {
27                 url = "/ctdl/r/" + escapeHTMLURI(current_room) + "/msgs.gt|" + gt_msg;
28         }
29
30         fetch_msg_list = async() => {
31                 response = await fetch(url);
32                 msgs = await(response.json());
33                 if (response.ok) {
34                         document.getElementById(target_div).innerHTML = "" ;
35
36                         // If we were given an explicit starting point, by all means start there.
37                         // Note that we don't have to remove them from the array because we did a 'msgs gt|xxx' command to Citadel.
38                         if (gt_msg > 0) {
39                                 msgs = msgs.slice(0, messages_per_page);
40                         }
41
42                         // Otherwise, show us the last 20 messages
43                         else {
44                                 if (msgs.length > messages_per_page) {
45                                         msgs = msgs.slice(msgs.length - messages_per_page);
46                                 }
47                                 new_old_div_name = randomString(5);
48                                 if (msgs.length < 1) {
49                                         newlt = lt_msg;
50                                 }
51                                 else {
52                                         newlt = msgs[0];
53                                 }
54                                 document.getElementById(target_div).innerHTML +=
55                                         "<div id=\"" + new_old_div_name + "\">" +
56                                         "<div class=\"ctdl-forum-nav\">" +
57                                         "<a href=\"javascript:forum_readmessages('" + new_old_div_name + "', 0, " + newlt + ");\">" +
58                                         "<i class=\"fa fa-arrow-circle-up\"></i>&nbsp;&nbsp;" +
59                                         _("Older posts") + "&nbsp;&nbsp;<i class=\"fa fa-arrow-circle-up\"></a></div></div></a></div></div>" ;
60                         }
61
62                         // Render an empty div for each message.  We will fill them in later.
63                         for (var i in msgs) {
64                                 document.getElementById(target_div).innerHTML += "<div id=\"ctdl_msg_" + msgs[i] + "\"> </div>" ;
65                                 document.getElementById("ctdl_msg_"+msgs[i]).style.display = "none";
66                         }
67                         if (lt_msg == 9999999999) {
68                                 new_new_div_name = randomString(5);
69                                 if (msgs.length <= 0) {
70                                         newgt = gt_msg;
71                                 }
72                                 else {
73                                         newgt = msgs[msgs.length-1];
74                                 }
75                                 document.getElementById(target_div).innerHTML +=
76                                         "<div id=\"" + new_new_div_name + "\">" +
77                                         "<div class=\"ctdl-forum-nav\">" +
78                                         "<a href=\"javascript:forum_readmessages('" + new_new_div_name + "', " + newgt + ", 9999999999);\">" +
79                                         "<i class=\"fa fa-arrow-circle-down\"></i>&nbsp;&nbsp;" +
80                                         _("Newer posts") + "&nbsp;&nbsp;<i class=\"fa fa-arrow-circle-down\"></a></div></div>" ;
81                         }
82
83                         // Now figure out where to scroll to after rendering.
84                         if (gt_msg > 0) {
85                                 scroll_to = msgs[0];
86                         }
87                         else if (lt_msg < 9999999999) {
88                                 scroll_to = msgs[msgs.length-1];
89                         }
90                         else if ( (logged_in) && (gt_msg == 0) && (lt_msg == 9999999999) ) {
91                                 scroll_to = msgs[msgs.length-1];
92                         }
93                         else {
94                                 scroll_to = msgs[0];            // FIXME this is too naive
95                         }
96
97                         // Render the individual messages in the divs
98                         forum_render_messages(msgs, "ctdl_msg_", scroll_to)
99                 }
100                 else {
101                         // if xhr fails, this will make the link reappear so the user can try again
102                         document.getElementById(target_div).innerHTML = original_text;
103                 }
104         }
105         fetch_msg_list();
106 }
107
108
109 // Render a range of messages, with the div prefix specified
110 //
111 function forum_render_messages(msgs, prefix, scroll_to) {
112         for (i=0; i<msgs.length; ++i) {
113                 forum_render_one(prefix, msgs[i], scroll_to);
114         }
115 }
116
117
118 // We have to put each XHR for forum_render_messages() into its own stack frame, otherwise it jumbles them together.  I don't know why.
119 function forum_render_one(prefix, msgnum, scroll_to) {
120         fetch_message = async() => {
121                 response = await fetch("/ctdl/r/" + escapeHTMLURI(current_room) + "/" + msgs[i] + "/json");
122                 msg = await response.json();
123                 if (response.ok) {
124                         outmsg =
125                           "<div class=\"ctdl-msg-wrapper\">"                            // begin message wrapper
126                         + "<div class=\"ctdl-avatar\">"                                 // begin avatar
127                         + "<img src=\"/ctdl/u/" + msg.from + "/userpic\" width=\"32\" "
128                         + "onerror=\"this.parentNode.innerHTML='&lt;i class=&quot;fa fa-user-circle fa-2x&quot;&gt;&lt;/i&gt; '\">"
129                         + "</div>"                                                      // end avatar
130                         + "<div class=\"ctdl-msg-content\">"                            // begin content
131                         + "<div class=\"ctdl-msg-header\">"                             // begin header
132                         + "<span class=\"ctdl-msg-header-info\">"                       // begin header info on left side
133                         + "<span class=\"ctdl-username\"><a href=\"#\">"                // FIXME link to user profile
134                         + msg.from
135                         + "</a></span>"                                                 // end username
136                         + "<span class=\"ctdl-msgdate\">"
137                         + msg.time
138                         + "</span>"                                                     // end msgdate
139                         + "</span>"                                                     // end header info on left side
140                         + "<span class=\"ctdl-msg-header-buttons\">"                    // begin buttons on right side
141
142                         + "<span class=\"ctdl-msg-button\">"                            // Reply button FIXME make this work
143                         + "<a href=\"javascript:open_reply_box('"+prefix+"',"+msgnum+",false);\">"
144                         + "<i class=\"fa fa-reply\"></i> " 
145                         + _("Reply")
146                         + "</a></span>"
147
148                         + "<span class=\"ctdl-msg-button\">"                            // ReplyQuoted , only show in forums FIXME
149                         + "<a href=\"javascript:open_reply_box('"+prefix+"',"+msgnum+",true);\">"
150                         + "<i class=\"fa fa-comment\"></i> " 
151                         + _("ReplyQuoted")
152                         + "</a></span>"
153
154                         + "<span class=\"ctdl-msg-button\"><a href=\"#\">"              // Delete , show only with permission FIXME
155                         + "<i class=\"fa fa-trash\"></i> " 
156                         + _("Delete")
157                         + "</a></span>"
158
159                         + "</span>";                                                    // end buttons on right side
160                         if (msg.subj) {
161                                 outmsg +=
162                                 "<br><span class=\"ctdl-msgsubject\">" + msg.subj + "</span>";
163                         }
164                         outmsg +=
165                           "</div><br>"                                                  // end header
166                         + "<div class=\"ctdl-msg-body\">"                               // begin body
167                         + msg.text
168                         + "</div>"                                                      // end body
169                         + "</div>"                                                      // end content
170                         + "</div>"                                                      // end wrapper
171                         ;
172                         document.getElementById(prefix+msgnum).innerHTML = outmsg;
173                 }
174                 else {
175                         document.getElementById(prefix+msgnum).innerHTML = "ERROR";
176                 }
177                 document.getElementById(prefix+msgnum).style.display  = "inline";
178                 if (msgnum == scroll_to) {
179                         document.getElementById(prefix+msgnum).scrollIntoView({behavior: "smooth", block: "start", inline: "nearest"});
180                 }
181         }
182         fetch_message();
183 }
184
185
186 // Open a reply box directly below a specific message
187 function open_reply_box(prefix, msgnum, is_quoted) {
188         target_div_name = prefix+msgnum;
189         new_div_name = prefix + "_reply_to_" + msgnum;
190         document.getElementById(target_div_name).outerHTML += "<div id=\"" + new_div_name + "\">reply box put here</div>";
191
192         replybox =
193           "<div class=\"ctdl-msg-wrapper\">"                            // begin message wrapper
194         + "<div class=\"ctdl-avatar\">"                                 // begin avatar
195         + "<img src=\"/ctdl/u/" + "FIXME my name" + "/userpic\" width=\"32\" "
196         + "onerror=\"this.parentNode.innerHTML='&lt;i class=&quot;fa fa-user-circle fa-2x&quot;&gt;&lt;/i&gt; '\">"
197         + "</div>"                                                      // end avatar
198         + "<div class=\"ctdl-msg-content\">"                            // begin content
199         + "<div class=\"ctdl-msg-header\">"                             // begin header
200         + "<span class=\"ctdl-msg-header-info\">"                       // begin header info on left side
201         + "<span class=\"ctdl-username\"><a href=\"#\">"                // FIXME link to user profile
202         + "FIXME my name"
203         + "</a></span>"                                                 // end username
204         + "<span class=\"ctdl-msgdate\">"
205         + "FIXME now time"
206         + "</span>"                                                     // end msgdate
207         + "</span>"                                                     // end header info on left side
208         + "<span class=\"ctdl-msg-header-buttons\">"                    // begin buttons on right side
209         + "x"
210         + "</span>";                                                    // end buttons on right side
211         if (msg.subj) {
212                 replybox +=
213                 "<br><span class=\"ctdl-msgsubject\">" + "FIXME subject" + "</span>";
214         }
215         replybox +=
216           "</div><br>"                                                  // end header
217
218
219         + "<div class=\"ctdl-msg-body\" id=\"ctdl-editor-body\" style=\"padding:5px;\" contenteditable=\"true\">"       // begin body
220         + "\n"                                                          // empty initial content
221         + "</div>"                                                      // end body
222
223
224         + "<div class=\"ctdl-msg-header\">"                             // begin footer
225         + "<span class=\"ctdl-msg-header-info\">"                       // begin footer info on left side
226         + "x"
227         + "</span>"                                                     // end footer info on left side
228         + "<span class=\"ctdl-msg-header-buttons\">"                    // begin buttons on right side
229
230         + "<span class=\"ctdl-msg-button\"><a href=\"javascript:save_message('" +  new_div_name + "', '" + msgnum + "');\">"
231         + "<i class=\"fa fa-check\" style=\"color:green\"></i> "        // save button
232         + _("Post message")
233         + "</a></span>"
234
235         + "<span class=\"ctdl-msg-button\"><a href=\"javascript:cancel_post('" +  new_div_name + "');\">"
236         + "<i class=\"fa fa-trash\" style=\"color:red\"></i> "          // cancel button
237         + _("Cancel")
238         + "</a></span>"
239
240         + "</span>"                                                     // end buttons on right side
241         + "</div><br>"                                                  // end footer
242
243
244         + "</div>"                                                      // end content
245         + "</div>"                                                      // end wrapper
246         ;
247
248         document.getElementById(new_div_name).innerHTML = replybox;
249         document.getElementById(new_div_name).scrollIntoView({behavior: "smooth", block: "end", inline: "nearest"});
250
251         // These actions must happen *after* the initial render loop completes.
252         setTimeout(function() {
253                 var tag = document.getElementById("ctdl-editor-body");
254                 tag.focus();                                            // sets the focus
255                 window.getSelection().collapse(tag.firstChild, 0);      // positions the cursor
256         }, 0);
257 }
258
259
260 // Abort a message post (it simply destroys the div)
261 function cancel_post(div_name) {
262         document.getElementById(div_name).outerHTML = "";               // make it cease to exist
263 }
264
265
266 // Save the posted message to the server
267 function save_message(div_name, reply_to_msgnum) {
268
269         document.body.style.cursor = "wait";
270
271         url = "/ctdl/r/" + escapeHTMLURI(current_room) + "/dummy_name_for_new_message";
272         boundary = randomString(20);
273
274         // This converts the message to base64, then splits it into 76-character chunks
275         encoded_msg_lines =
276                 btoa("<html><body>" + document.getElementById("ctdl-editor-body").innerHTML + "</body></html>")
277                 .match(/.{1,76}/g);
278
279         body_text =
280                 "--" + boundary + "\r\n"
281                 + "Content-type: text/html\r\n"
282                 + "Content-transfer-encoding: base64\r\n"
283                 + "\r\n";
284         for (var i=0; i<encoded_msg_lines.length; ++i) {
285                 body_text += encoded_msg_lines[i] + "\r\n";
286         }
287         body_text += "\r\n"
288                 + "--" + boundary + "--\r\n"
289         ;
290
291         var request = new XMLHttpRequest();
292         request.open("PUT", url, true);
293         request.setRequestHeader("Content-type", "multipart/mixed; boundary=\"" + boundary + "\"");
294         request.onreadystatechange = function() {
295                 if (request.readyState == 4) {
296                         document.body.style.cursor = "default";
297                         if (Math.trunc(request.status / 100) == 2) {
298                                 alert("headers: " + request.getAllResponseHeaders());
299                                 document.getElementById(div_name).outerHTML = "";               // close the editor
300                         }
301                         else {
302                                 error_message = request.responseText;
303                                 if (error_message.length == 0) {
304                                         error_message = _("An error has occurred.");
305                                 }
306                                 alert(error_message);                                           // FIXME make this pretty
307                         }
308                 }
309         };
310         request.send(body_text);
311 }