1 /*
2  * This program is free software; you can redistribute it and/or
3  * modify it under the terms of the GNU General Public License
4  * as published by the Free Software Foundation; either version 2
5  * of the License, or (at your option) any later version.
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  * You should have received a copy of the GNU General Public License
13  * along with this program; if not, write to the Free Software
14  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
15  */
16 #define TOPIC_INTERNAL_ACCESS
17 #include "common/setup_before.h"
18 #include <stdio.h>
19 #ifdef HAVE_STDDEF_H
20 # include <stddef.h>
21 #else
22 # ifndef NULL
23 #  define NULL ((void *)0)
24 # endif
25 #endif
26 #ifdef STDC_HEADERS
27 # include <stdlib.h>
28 #else
29 # ifdef HAVE_MALLOC_H
30 #  include <malloc.h>
31 # endif
32 #endif
33 #ifdef HAVE_STRING_H
34 # include <string.h>
35 #else
36 # ifdef HAVE_STRINGS_H
37 #  include <strings.h>
38 # endif
39 #endif
40 #include "compat/strrchr.h"
41 #include "compat/strdup.h"
42 #include "compat/strcasecmp.h"
43 #include "compat/pdir.h"
44 #include <errno.h>
45 #include "compat/strerror.h"
46 #ifdef TIME_WITH_SYS_TIME
47 # include <sys/time.h>
48 # include <time.h>
49 #else
50 # ifdef HAVE_SYS_TIME_H
51 #  include <sys/time.h>
52 # else
53 #  include <time.h>
54 # endif
55 #endif
56 #ifdef HAVE_SYS_TYPES_H
57 # include <sys/types.h>
58 #endif
59 #include "common/eventlog.h"
60 #include "common/list.h"
61 #include "common/field_sizes.h"
62 #include "common/xalloc.h"
63 #include "prefs.h"
64 #include "topic.h"
65 #include "common/setup_after.h"
66 
67 static t_list * topiclist_head=NULL;
68 
get_topic(char const * channel_name)69 t_topic * get_topic(char const * channel_name)
70 {
71   t_elem  * curr;
72   t_topic * topic;
73 
74   if (topiclist_head)
75   {
76     LIST_TRAVERSE(topiclist_head,curr)
77     {
78       if (!(topic = elem_get_data(curr)))
79       {
80         eventlog(eventlog_level_error,__FUNCTION__,"found NULL entry in list");
81         continue;
82       }
83       if (strcasecmp(channel_name,topic->channel_name)==0) return topic;
84     }
85   }
86   return NULL;
87 }
88 
channel_get_topic(char const * channel_name)89 char * channel_get_topic(char const * channel_name)
90 {
91   t_topic * topic;
92 
93   if (!(topic = get_topic(channel_name)))
94     return NULL;
95   else
96     return topic->topic;
97 }
98 
topiclist_save(char const * topic_file)99 int topiclist_save(char const * topic_file)
100 {
101   t_elem  * curr;
102   t_topic * topic;
103   FILE * fp;
104 
105   if (topiclist_head)
106   {
107 
108     if ((fp = fopen(topic_file,"w"))==NULL)
109     {
110       eventlog(eventlog_level_error, __FUNCTION__,"can't open topic file");
111       return -1;
112     }
113 
114     LIST_TRAVERSE(topiclist_head,curr)
115     {
116       if (!(topic = elem_get_data(curr)))
117       {
118         eventlog(eventlog_level_error,__FUNCTION__,"found NULL entry in list");
119         continue;
120       }
121       if (topic->save == DO_SAVE_TOPIC)
122         fprintf(fp,"\"%s\",\"%s\"\n",topic->channel_name,topic->topic);
123     }
124 
125     fclose(fp);
126   }
127 
128   return 0;
129 }
130 
topiclist_add_topic(char const * channel_name,char const * topic_text,int do_save)131 int topiclist_add_topic(char const * channel_name, char const * topic_text, int do_save)
132 {
133   t_topic * topic;
134 
135   topic = xmalloc(sizeof(t_topic));
136   topic->channel_name = xstrdup(channel_name);
137   topic->topic = xstrdup(topic_text);
138   list_prepend_data(topiclist_head,topic);
139   topic->save = do_save;
140   return 0;
141 }
142 
channel_set_topic(char const * channel_name,char const * topic_text,int do_save)143 int channel_set_topic(char const * channel_name, char const * topic_text, int do_save)
144 {
145   t_topic * topic;
146 
147   if (!(channel_name))
148   {
149     eventlog(eventlog_level_error,__FUNCTION__,"got NULL channel_name");
150     return -1;
151   }
152 
153   if (!(topic_text))
154   {
155     eventlog(eventlog_level_error,__FUNCTION__,"got NULL topic");
156     return -1;
157   }
158 
159   if ((topic = get_topic(channel_name)))
160   {
161     xfree((void *)topic->topic);
162     topic->topic = xstrdup(topic_text);
163   }
164   else
165   {
166     topiclist_add_topic(channel_name, topic_text,do_save);
167   }
168 
169   if (do_save == DO_SAVE_TOPIC)
170   {
171     if (topiclist_save(prefs_get_topicfile())<0)
172     {
173       eventlog(eventlog_level_error,__FUNCTION__,"error saving topic list");
174       return -1;
175     }
176   }
177 
178   return 0;
179 }
180 
topiclist_load(char const * topicfile)181 int topiclist_load(char const * topicfile)
182 {
183   FILE * fp;
184   char channel_name[CHANNEL_NAME_LEN];
185   char topic[MAX_TOPIC_LEN];
186 
187   // make sure to unload previous topiclist before loading again
188   if (topiclist_head) topiclist_unload();
189 
190   if ((fp = fopen(topicfile,"r"))==NULL)
191   {
192     eventlog(eventlog_level_error, __FUNCTION__,"can't open topic file");
193     return -1;
194   }
195 
196   topiclist_head = list_create();
197 
198   eventlog(eventlog_level_trace,__FUNCTION__,"start reading topic file");
199 
200   while (fscanf(fp,"\"%[^\"]\",\"%[^\"]\"\n",channel_name,topic)==2)
201   {
202     topiclist_add_topic(channel_name,topic,DO_SAVE_TOPIC);
203     eventlog(eventlog_level_trace,__FUNCTION__,"channel: %s topic: \"%s\"",channel_name,topic);
204   }
205 
206   eventlog(eventlog_level_trace,__FUNCTION__,"finished reading topic file");
207 
208   fclose(fp);
209   return 0;
210 }
211 
topiclist_unload(void)212 int topiclist_unload(void)
213 {
214   t_elem  * curr;
215   t_topic * topic;
216 
217   if (topiclist_head)
218   {
219     LIST_TRAVERSE(topiclist_head,curr)
220     {
221       if (!(topic = elem_get_data(curr)))
222       {
223         eventlog(eventlog_level_error,__FUNCTION__,"found NULL entry in list");
224         continue;
225       }
226 
227       if (topic->channel_name) xfree((void *)topic->channel_name);
228       if (topic->topic) xfree((void *)topic->topic);
229       xfree((void *)topic);
230       list_remove_elem(topiclist_head,&curr);
231     }
232     if (list_destroy(topiclist_head)<0)
233       return -1;
234 
235     topiclist_head = NULL;
236   }
237   return 0;
238 }
239