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bca4e2b7 RK |
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 | ||
21 | #include <config.h> | |
22 | #include "types.h" | |
23 | ||
448d3570 RK |
24 | #include "actions.h" |
25 | #include "lookups.h" | |
26 | ||
bca4e2b7 RK |
27 | /** @brief Login cookie */ |
28 | char *login_cookie; | |
29 | ||
448d3570 RK |
30 | /* 'playing' and 'manage' just add a Refresh: header */ |
31 | static void act_playing(void) { | |
32 | long refresh = config->refresh; | |
33 | long length; | |
34 | time_t now, fin; | |
35 | char *url; | |
36 | ||
37 | lookups(DC_PLAYING|DC_QUEUE|DC_ENABLED|DC_RANDOM_ENABLED); | |
38 | if(playing | |
39 | && playing->state == playing_started /* i.e. not paused */ | |
40 | && !disorder_length(client, playing->track, &length) | |
41 | && length | |
42 | && playing->sofar >= 0) { | |
43 | /* Try to put the next refresh at the start of the next track. */ | |
44 | time(&now); | |
45 | fin = now + length - playing->sofar + config->gap; | |
46 | if(now + refresh > fin) | |
47 | refresh = fin - now; | |
48 | } | |
49 | if(queue && queue->state == playing_isscratch) { | |
50 | /* next track is a scratch, don't leave more than the inter-track gap */ | |
51 | if(refresh > config->gap) | |
52 | refresh = config->gap; | |
53 | } | |
54 | if(!playing | |
55 | && ((queue | |
56 | && queue->state != playing_random) | |
57 | || random_enabled) | |
58 | && enabled) { | |
59 | /* no track playing but playing is enabled and there is something coming | |
60 | * up, must be in a gap */ | |
61 | if(refresh > config->gap) | |
62 | refresh = config->gap; | |
63 | } | |
64 | if((action = cgi_get("action"))) | |
65 | url = cgi_makeurl(config->url, "action", action, (char *)0); | |
66 | else | |
67 | url = config->url; | |
68 | if(printf("Content-Type: text/html\n" | |
69 | "Refresh: %ld;url=%s\n" | |
70 | /* TODO cookie */ | |
71 | "\n", | |
72 | refresh, url) < 0) | |
73 | fatal(errno, "error writing to stdout"); | |
74 | disorder_cgi_expand(action ? action : "playing"); | |
75 | } | |
76 | ||
bca4e2b7 RK |
77 | /** @brief Table of actions */ |
78 | static const struct action { | |
79 | /** @brief Action name */ | |
80 | const char *name; | |
81 | /** @brief Action handler */ | |
82 | void (*handler)(void); | |
83 | } actions[] = { | |
84 | { "confirm", act_confirm }, | |
85 | { "disable", act_disable }, | |
86 | { "edituser", act_edituser }, | |
87 | { "enable", act_enable }, | |
88 | { "login", act_login }, | |
89 | { "logout", act_logout }, | |
448d3570 | 90 | { "manage", act_playing }, |
bca4e2b7 RK |
91 | { "move", act_move }, |
92 | { "pause", act_pause }, | |
93 | { "play", act_play }, | |
94 | { "playing", act_playing }, | |
95 | { "prefs", act_prefs }, | |
96 | { "random-disable", act_random_disable }, | |
97 | { "random-enable", act_random_enable }, | |
98 | { "register", act_register }, | |
99 | { "reminder", act_reminder }, | |
100 | { "remove", act_remove }, | |
101 | { "resume", act_resume }, | |
102 | { "scratch", act_scratch }, | |
103 | { "volume", act_volume }, | |
104 | }; | |
105 | ||
106 | /** @brief Expand a template | |
107 | * @param name Base name of template, or NULL to consult CGI args | |
108 | */ | |
109 | void disorder_cgi_expand(const char *name) { | |
110 | const char *p; | |
111 | ||
112 | /* For unknown actions check that they aren't evil */ | |
113 | for(p = name; *p && isalnum((unsigned char)*p); ++p) | |
114 | ; | |
115 | if(*p) | |
116 | fatal(0, "invalid action name '%s'", action); | |
117 | byte_xasprintf((char **)&p, "%s.tmpl", action); | |
118 | if(mx_expand_file(p, sink_stdio(stdout), 0) == -1 | |
119 | || fflush(stdout) < 0) | |
120 | fatal(errno, "error writing to stdout"); | |
121 | } | |
122 | ||
123 | /** @brief Execute a web action | |
124 | * @param action Action to perform, or NULL to consult CGI args | |
125 | * | |
126 | * If no recognized action is specified then 'playing' is assumed. | |
127 | */ | |
128 | void disorder_cgi_action(const char *action) { | |
129 | int n; | |
130 | char *s; | |
131 | ||
132 | /* Consult CGI args if caller had no view */ | |
133 | if(!action) | |
134 | action = cgi_get("action"); | |
135 | /* Pick a default if nobody cares at all */ | |
136 | if(!action) { | |
137 | /* We allow URLs which are just c=... in order to keep confirmation URLs, | |
138 | * which are user-facing, as short as possible. Actually we could lose the | |
139 | * c= for this... */ | |
140 | if(cgi_get("c")) | |
141 | action = "confirm"; | |
142 | else | |
143 | action = "playing"; | |
144 | } | |
145 | if((n = TABLE_FIND(actions, struct action, name, action)) >= 0) | |
146 | /* Its a known action */ | |
147 | actions[n].handler(); | |
448d3570 | 148 | else { |
bca4e2b7 | 149 | /* Just expand the template */ |
448d3570 RK |
150 | if(printf("Content-Type: text/html\n" |
151 | /* TODO cookie */ | |
152 | "\n") < 0) | |
153 | fatal(errno, "error writing to stdout"); | |
bca4e2b7 | 154 | disorder_cgi_expand(action); |
448d3570 | 155 | } |
bca4e2b7 RK |
156 | } |
157 | ||
158 | /** @brief Generate an error page */ | |
159 | void disorder_cgi_error(const char *msg, ...) { | |
160 | va_list ap; | |
161 | ||
162 | va_start(ap, msg); | |
163 | byte_xvasprintf(&error_string, msg, ap); | |
164 | va_end(ap); | |
165 | disorder_cgi_expand("error"); | |
166 | } | |
167 | ||
168 | /** @brief Log in as the current user or guest if none */ | |
169 | void disorder_cgi_login(dcgi_state *ds, struct sink *output) { | |
170 | /* Junk old data */ | |
171 | disorder_macros_reset(); | |
172 | /* Reconnect */ | |
173 | if(disorder_connect_cookie(client, login_cookie)) { | |
174 | disorder_cgi_error("Cannot connect to server"); | |
175 | exit(0); | |
176 | } | |
177 | /* If there was a cookie but it went bad, we forget it */ | |
178 | if(login_cookie && !strcmp(disorder_user(>client), "guest")) | |
179 | login_cookie = 0; | |
180 | } | |
181 | ||
182 | /* | |
183 | Local Variables: | |
184 | c-basic-offset:2 | |
185 | comment-column:40 | |
186 | fill-column:79 | |
187 | indent-tabs-mode:nil | |
188 | End: | |
189 | */ |