chiark - git - mdw - disorder/blob - server/lookup.c

   1 /*
   2  * This file is part of DisOrder.
   3  * Copyright (C) 2004-2008 Richard Kettlewell
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  18  * USA
  19  */
  20 /** @file server/lookup.c
  21  * @brief Server lookups
  22  *
  23  * To improve performance many server lookups are cached.
  24  */
  25
  26 #include "disorder-cgi.h"
  27
  28 /** @brief Cached data */
  29 static unsigned flags;
  30
  31 struct queue_entry *dcgi_queue;
  32 struct queue_entry *dcgi_playing;
  33 struct queue_entry *dcgi_recent;
  34
  35 int dcgi_volume_left;
  36 int dcgi_volume_right;
  37
  38 char **dcgi_new;
  39 int dcgi_nnew;
  40
  41 rights_type dcgi_rights;
  42
  43 int dcgi_enabled;
  44 int dcgi_random_enabled;
  45
  46 /** @brief Fetch cachable data */
  47 void dcgi_lookup(unsigned want) {
  48   unsigned need = want ^ (flags & want);
  49   struct queue_entry *r, *rnext;
  50 #if 0
  51   const char *dir, *re;
  52 #endif
  53   char *rs;
  54
  55   if(!dcgi_client || !need)
  56     return;
  57   if(need & DCGI_QUEUE)
  58     disorder_queue(dcgi_client, &dcgi_queue);
  59   if(need & DCGI_PLAYING)
  60     disorder_playing(dcgi_client, &dcgi_playing);
  61   if(need & DCGI_NEW)
  62     disorder_new_tracks(dcgi_client, &dcgi_new, &dcgi_nnew, 0);
  63   if(need & DCGI_RECENT) {
  64     /* we need to reverse the order of the list */
  65     disorder_recent(dcgi_client, &r);
  66     while(r) {
  67       rnext = r->next;
  68       r->next = dcgi_recent;
  69       dcgi_recent = r;
  70       r = rnext;
  71     }
  72   }
  73   if(need & DCGI_VOLUME)
  74     disorder_get_volume(dcgi_client,
  75                         &dcgi_volume_left, &dcgi_volume_right);
  76 #if 0
  77   /* DCGI_FILES and DCGI_DIRS are looking obsolete now */
  78   if(need & (DCGI_FILES|DCGI_DIRS)) {
  79     if(!(dir = cgi_get("directory")))
  80       dir = "";
  81     re = cgi_get("regexp");
  82     if(need & DCGI_DIRS)
  83       if(disorder_directories(dcgi_client, dir, re,
  84                               &dirs, &ndirs))
  85         ndirs = 0;
  86     if(need & DCGI_FILES)
  87       if(disorder_files(dcgi_client, dir, re,
  88                         &files, &nfiles))
  89         nfiles = 0;
  90   }
  91 #endif
  92   if(need & DCGI_RIGHTS) {
  93     dcgi_rights = RIGHT_READ;   /* fail-safe */
  94     if(!disorder_userinfo(dcgi_client, disorder_user(dcgi_client),
  95                           "rights", &rs))
  96       parse_rights(rs, &dcgi_rights, 1);
  97   }
  98   if(need & DCGI_ENABLED)
  99     disorder_enabled(dcgi_client, &dcgi_enabled);
 100   if(need & DCGI_RANDOM_ENABLED)
 101     disorder_random_enabled(dcgi_client, &dcgi_random_enabled);
 102   flags |= need;
 103 }
 104
 105 void dcgi_lookup_reset(void) {
 106   /* Forget everything we knew */
 107   flags = 0;
 108   dcgi_recent = 0;
 109   dcgi_queue = 0;
 110   dcgi_playing = 0;
 111   dcgi_rights = 0;
 112   dcgi_new = 0;
 113   dcgi_nnew = 0;
 114   dcgi_enabled = 0;
 115   dcgi_random_enabled = 0;
 116   dcgi_volume_left = dcgi_volume_right = 0;
 117 }
 118
 119
 120 /*
 121 Local Variables:
 122 c-basic-offset:2
 123 comment-column:40
 124 fill-column:79
 125 indent-tabs-mode:nil
 126 End:
 127 */