webcit-ng/static/js/views.js

   1 //
   2 // Copyright (c) 2016-2018 by the citadel.org team
   3 //
   4 // This program is open source software; you can redistribute it and/or modify
   5 // it under the terms of the GNU General Public License version 3.
   6 //
   7 // This program is distributed in the hope that it will be useful,
   8 // but WITHOUT ANY WARRANTY; without even the implied warranty of
   9 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10 // GNU General Public License for more details.
  11
  12
  13 // List of defined views shamelessly swiped from libcitadel headers
  14 //
  15 var views = {
  16         VIEW_BBS                : 0,    /* Bulletin board view */
  17         VIEW_MAILBOX            : 1,    /* Mailbox summary */
  18         VIEW_ADDRESSBOOK        : 2,    /* Address book view */
  19         VIEW_CALENDAR           : 3,    /* Calendar view */
  20         VIEW_TASKS              : 4,    /* Tasks view */
  21         VIEW_NOTES              : 5,    /* Notes view */
  22         VIEW_WIKI               : 6,    /* Wiki view */
  23         VIEW_CALBRIEF           : 7,    /* Brief Calendar view */
  24         VIEW_JOURNAL            : 8,    /* Journal view */
  25         VIEW_DRAFTS             : 9,    /* Drafts view */
  26         VIEW_BLOG               : 10,   /* Blog view */
  27         VIEW_QUEUE              : 11,   /* SMTP QUEUE rooms */
  28         VIEW_WIKIMD             : 12,   /* Markdown Wiki view */
  29 };
  30
  31
  32 // This function is the dispatcher that determines the correct view for a room,
  33 // and calls the correct renderer.  Greater/Less than bounds are accepted.
  34 //
  35 function render_room_view(gt_msg, lt_msg)
  36 {
  37         switch(current_view)
  38         {
  39                 case views.VIEW_MAILBOX:                                                // FIXME view mail rooms as forums for now
  40                 case views.VIEW_BBS:
  41                         forum_readmessages("ctdl-main", gt_msg, lt_msg);
  42                         break;
  43                 default:
  44                         document.getElementById("ctdl-main").innerHTML = "The view for " + current_room + " is " + current_view + " but there is no renderer." ;
  45                         break;
  46         }
  47
  48 }
  49
  50
  51 // Forum view (flat) -- let's have another go at this with the rendering done client-side
  52 //
  53 function forum_readmessages(target_div, gt_msg, lt_msg)
  54 {
  55         original_text = document.getElementById(target_div).innerHTML;          // in case we need to replace it after an error
  56         document.getElementById(target_div).innerHTML =
  57                 "<i class=\"fas fa-spinner fa-spin\"></i>&nbsp;&nbsp;"
  58                 + _("Loading messages from server, please wait") ;
  59
  60         var request = new XMLHttpRequest();
  61         if (lt_msg < 9999999999)
  62         {
  63                 request.open("GET", "/ctdl/r/" + escapeHTMLURI(current_room) + "/msgs.lt|" + lt_msg, true);
  64         }
  65         else
  66         {
  67                 request.open("GET", "/ctdl/r/" + escapeHTMLURI(current_room) + "/msgs.gt|" + gt_msg, true);
  68         }
  69         request.onreadystatechange = function()
  70         {
  71                 if (this.readyState === 4)
  72                 {
  73                         if ((this.status / 100) == 2)
  74                         {
  75                                 msgs = JSON.parse(this.responseText);
  76                                 document.getElementById(target_div).innerHTML = "" ;
  77
  78                                 // If we were given an explicit starting point, by all means start there.
  79                                 // Note that we don't have to remove them from the array because we did a 'msgs gt|xxx' command to Citadel.
  80                                 if (gt_msg > 0)
  81                                 {
  82                                         msgs = msgs.slice(0, messages_per_page);
  83                                 }
  84
  85                                 // show us the last 20 messages and scroll to the bottom (this will become the not-logged-in behavior)
  86                                 else if ((logged_in) | (!logged_in) | (lt_msg < 9999999999))
  87                                 {
  88                                         if (msgs.length > messages_per_page)
  89                                         {
  90                                                 msgs = msgs.slice(msgs.length - messages_per_page);
  91                                         }
  92                                         new_old_div_name = randomString(5);
  93                                         if (msgs.length < 1)
  94                                         {
  95                                                 newlt = lt_msg;
  96                                         }
  97                                         else
  98                                         {
  99                                                 newlt = msgs[0];
 100                                         }
 101                                         document.getElementById(target_div).innerHTML +=
 102                                                 "<div id=\"" + new_old_div_name + "\">" +
 103                                                 "<a href=\"javascript:forum_readmessages('" + new_old_div_name + "', 0, " + newlt + ");\">" +
 104                                                 "link to msgs less than " + newlt + "</a></div>" ;
 105                                 }
 106
 107                                 // Render the divs (we will fill them in later)
 108                                 for (var i in msgs)
 109                                 {
 110                                         document.getElementById(target_div).innerHTML += "<div id=\"ctdl_msg_" + msgs[i] + "\">#" + msgs[i] + "</div>" ;
 111                                 }
 112                                 if (lt_msg == 9999999999)
 113                                 {
 114                                         new_new_div_name = randomString(5);
 115                                         if (msgs.length <= 0)
 116                                         {
 117                                                 newgt = gt_msg;
 118                                         }
 119                                         else
 120                                         {
 121                                                 newgt = msgs[msgs.length-1];
 122                                         }
 123                                         document.getElementById(target_div).innerHTML +=
 124                                                 "<div id=\"" + new_new_div_name + "\">" +
 125                                                 "<a href=\"javascript:forum_readmessages('" + new_new_div_name + "', " + newgt + ", 9999999999);\">" +
 126                                                 "link to msgs greater than " + newgt + "</a></div>" ;
 127                                 }
 128
 129                                 // Render the individual messages in the divs
 130                                 render_messages(msgs, "ctdl_msg_", views.VIEW_BBS);
 131                         }
 132                         else
 133                         {
 134                                 document.getElementById(target_div).innerHTML = original_text;          // this will make the link reappear so the user can try again
 135                         }
 136                 }
 137         };
 138         request.send();
 139         request = null;
 140 }
 141
 142
 143 // Render a range of messages, in the view specified, with the div prefix specified
 144 //
 145 function render_messages(msgs, prefix, view)
 146 {
 147         for (i=0; i<msgs.length; ++i)
 148         {
 149                 render_one(prefix+msgs[i], msgs[i], view);
 150         }
 151 }
 152
 153
 154 // We have to put each XHR for render_messages() into its own stack frame, otherwise it jumbles them together.  I don't know why.
 155 function render_one(div, msgnum, view)
 156 {
 157         var request = new XMLHttpRequest();
 158         request.open("GET", "/ctdl/r/" + escapeHTMLURI(current_room) + "/" + msgs[i] + "/html", true);
 159         request.onreadystatechange = function()
 160         {
 161                 if (this.readyState === 4)
 162                 {
 163                         if ((this.status / 100) == 2)
 164                         {
 165                                 document.getElementById(div).innerHTML = this.responseText;     // FIXME don't let the C server render it.  do JSON now.
 166                         }
 167                         else
 168                         {
 169                                 document.getElementById(div).innerHTML = "ERROR";
 170                         }
 171                 }
 172         };
 173         request.send();
 174         request = null;
 175 }
 176