chiark / gitweb /
Delay search initiation for a bit after the last keypress, to avoid
[disorder] / cgi / 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 /** @brief Map of hashes to queud data */
32 static hash *queuemap;
33
34 struct queue_entry *dcgi_queue;
35 struct queue_entry *dcgi_playing;
36 struct queue_entry *dcgi_recent;
37
38 int dcgi_volume_left;
39 int dcgi_volume_right;
40
41 char **dcgi_new;
42 int dcgi_nnew;
43
44 rights_type dcgi_rights;
45
46 int dcgi_enabled;
47 int dcgi_random_enabled;
48
49 static void queuemap_add(struct queue_entry *q) {
50   if(!queuemap)
51     queuemap = hash_new(sizeof (struct queue_entry *));
52   for(; q; q = q->next)
53     hash_add(queuemap, q->id, &q, HASH_INSERT_OR_REPLACE);
54 }
55
56 /** @brief Fetch cachable data */
57 void dcgi_lookup(unsigned want) {
58   unsigned need = want ^ (flags & want);
59   struct queue_entry *r, *rnext;
60   char *rs;
61
62   if(!dcgi_client || !need)
63     return;
64   if(need & DCGI_QUEUE) {
65     disorder_queue(dcgi_client, &dcgi_queue);
66     queuemap_add(dcgi_queue);
67   }
68   if(need & DCGI_PLAYING) {
69     disorder_playing(dcgi_client, &dcgi_playing);
70     queuemap_add(dcgi_playing);
71   }
72   if(need & DCGI_NEW)
73     disorder_new_tracks(dcgi_client, &dcgi_new, &dcgi_nnew, 0);
74   if(need & DCGI_RECENT) {
75     /* we need to reverse the order of the list */
76     disorder_recent(dcgi_client, &r);
77     while(r) {
78       rnext = r->next;
79       r->next = dcgi_recent;
80       dcgi_recent = r;
81       r = rnext;
82     }
83     queuemap_add(dcgi_recent);
84   }
85   if(need & DCGI_VOLUME)
86     disorder_get_volume(dcgi_client,
87                         &dcgi_volume_left, &dcgi_volume_right);
88   if(need & DCGI_RIGHTS) {
89     dcgi_rights = RIGHT_READ;   /* fail-safe */
90     if(!disorder_userinfo(dcgi_client, disorder_user(dcgi_client),
91                           "rights", &rs))
92       parse_rights(rs, &dcgi_rights, 1);
93   }
94   if(need & DCGI_ENABLED)
95     disorder_enabled(dcgi_client, &dcgi_enabled);
96   if(need & DCGI_RANDOM_ENABLED)
97     disorder_random_enabled(dcgi_client, &dcgi_random_enabled);
98   flags |= need;
99 }
100
101 /** @brief Locate a track by ID */
102 struct queue_entry *dcgi_findtrack(const char *id) {
103   struct queue_entry **qq;
104
105   if(queuemap && (qq = hash_find(queuemap, id)))
106     return *qq;
107   dcgi_lookup(DCGI_PLAYING);
108   if(queuemap && (qq = hash_find(queuemap, id)))
109     return *qq;
110   dcgi_lookup(DCGI_QUEUE);
111   if(queuemap && (qq = hash_find(queuemap, id)))
112     return *qq;
113   dcgi_lookup(DCGI_RECENT);
114   if(queuemap && (qq = hash_find(queuemap, id)))
115     return *qq;
116   return NULL;
117 }
118
119 void dcgi_lookup_reset(void) {
120   /* Forget everything we knew */
121   flags = 0;
122   queuemap = 0;
123   dcgi_recent = 0;
124   dcgi_queue = 0;
125   dcgi_playing = 0;
126   dcgi_rights = 0;
127   dcgi_new = 0;
128   dcgi_nnew = 0;
129   dcgi_enabled = 0;
130   dcgi_random_enabled = 0;
131   dcgi_volume_left = dcgi_volume_right = 0;
132 }
133
134
135 /*
136 Local Variables:
137 c-basic-offset:2
138 comment-column:40
139 fill-column:79
140 indent-tabs-mode:nil
141 End:
142 */