If a webcit user is logged in and loads the RSS feed
[citadel.git] / webcit / feed_generator.c
1 /*
2  * RSS/Atom feed generator
3  *
4  * Copyright (c) 2010 by the citadel.org team
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 3 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
19  */
20
21 #include "webcit.h"
22 #include "webserver.h"
23
24
25 /*
26  * RSS feed generator -- do one message
27  */
28 void feed_rss_one_message(long msgnum) {
29         char buf[1024];
30         int in_body = 0;
31         int found_title = 0;
32         char pubdate[128];
33
34         serv_printf("MSG0 %ld", msgnum);                /* FIXME we want msg4 eventually */
35         serv_getln(buf, sizeof buf);
36         if (buf[0] != '1') return;
37
38         wc_printf("<item>");
39         wc_printf("<link>%s/readfwd?gotofirst=", ChrPtr(site_prefix));
40         urlescputs(ChrPtr(WC->CurRoom.name));
41         wc_printf("?start_reading_at=%ld</link>", msgnum);
42
43         while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
44                 if (in_body) {
45                         escputs(buf);
46                         wc_printf("\r\n");
47                 }
48                 else if (!strncasecmp(buf, "subj=", 5)) {
49                         wc_printf("<title>");
50                         escputs(&buf[5]);
51                         wc_printf("</title>");
52                         ++found_title;
53                 }
54                 else if (!strncasecmp(buf, "exti=", 5)) {
55                         wc_printf("<guid>");
56                         escputs(&buf[5]);
57                         wc_printf("</guid>");
58                 }
59                 else if (!strncasecmp(buf, "time=", 5)) {
60                         http_datestring(pubdate, sizeof pubdate, atol(&buf[5]));
61                         wc_printf("<pubDate>%s</pubDate>", pubdate);
62                 }
63                 else if (!strncasecmp(buf, "text", 4)) {
64                         if (!found_title) {
65                                 wc_printf("<title>Message #%ld</title>", msgnum);
66                         }
67                         wc_printf("<description>");
68                         in_body = 1;
69                 }
70         }
71
72         if (in_body) {
73                 wc_printf("</description>");
74         }
75
76         wc_printf("</item>");
77 }
78
79 /*
80  * RSS feed generator -- go through the message list
81  */
82 void feed_rss_do_messages(void) {
83         wcsession *WCC = WC;
84         int num_msgs = 0;
85         int i;
86         SharedMessageStatus Stat;
87         message_summary *Msg = NULL;
88
89         memset(&Stat, 0, sizeof Stat);
90         Stat.maxload = INT_MAX;
91         Stat.lowest_found = (-1);
92         Stat.highest_found = (-1);
93         num_msgs = load_msg_ptrs("MSGS ALL", &Stat, NULL);
94         if (num_msgs < 1) return;
95
96         i = num_msgs;                                   /* convention is to feed newest-to-oldest */
97         while (i > 0) {
98                 Msg = GetMessagePtrAt(i-1, WCC->summ);
99                 if (Msg != NULL) {
100                         feed_rss_one_message(Msg->msgnum);
101                 }
102                 --i;
103         }
104 }
105
106
107 /*
108  * Entry point for RSS feed generator
109  */
110 void feed_rss(void) {
111         char buf[1024];
112
113         output_headers(0, 0, 0, 0, 1, 0);
114         hprintf("Content-type: text/xml\r\n");
115         hprintf(
116                 "Server: %s / %s\r\n"
117                 "Connection: close\r\n"
118         ,
119                 PACKAGE_STRING, ChrPtr(WC->serv_info->serv_software)
120         );
121         begin_burst();
122
123         wc_printf("<?xml version=\"1.0\"?>"
124                 "<rss version=\"2.0\" xmlns:atom=\"http://www.w3.org/2005/Atom\">"
125                 "<channel>"
126         );
127
128         wc_printf("<title>");
129         escputs(ChrPtr(WC->CurRoom.name));
130         wc_printf("</title>");
131
132         wc_printf("<link>");
133         urlescputs(ChrPtr(site_prefix));
134         wc_printf("</link>");
135
136         serv_puts("RINF");
137         serv_getln(buf, sizeof buf);
138         if (buf[0] == '1') {
139                 wc_printf("<description>\r\n");
140                 while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
141                         escputs(buf);
142                         wc_printf("\r\n");
143                 }
144                 wc_printf("</description>");
145         }
146
147         wc_printf("<image><title>");
148         escputs(ChrPtr(WC->CurRoom.name));
149         wc_printf("</title><url>");
150         urlescputs(ChrPtr(site_prefix));
151         wc_printf("/image?name=_roompic_?gotofirst=");
152         urlescputs(ChrPtr(WC->CurRoom.name));
153         wc_printf("</url><link>");
154         urlescputs(ChrPtr(site_prefix));
155         wc_printf("</link></image>\r\n");
156
157         feed_rss_do_messages();
158
159         wc_printf("</channel>"
160                 "</rss>"
161                 "\r\n\r\n"
162         );
163
164         wDumpContent(0);
165 }
166
167
168 /*
169  * Offer the RSS feed button for this room
170  */
171 void tmplput_rssbutton(StrBuf *Target, WCTemplputParams *TP) 
172 {
173         wcsession *WCC = WC;
174         char feed_link[1024];
175         char encoded_link[1024];
176
177         strcpy(feed_link, "/feed_rss?gotofirst=");
178         urlesc(&feed_link[20], sizeof(feed_link) - 20, (char *)ChrPtr(WCC->CurRoom.name) );
179         CtdlEncodeBase64(encoded_link, feed_link, strlen(feed_link), 0);
180
181         StrBufAppendPrintf(Target, "<a href=\"/B64%s\">", encoded_link);
182         StrBufAppendPrintf(Target, "<img border=\"0\" src=\"static/rss_16x.png\">");
183         StrBufAppendPrintf(Target, "</a>");
184 }
185
186
187
188 void 
189 InitModule_RSS
190 (void)
191 {
192         WebcitAddUrlHandler(HKEY("feed_rss"), "", 0, feed_rss, ANONYMOUS|COOKIEUNNEEDED);
193         RegisterNamespace("THISROOM:FEED:RSS", 0, 0, tmplput_rssbutton, NULL, CTX_NONE);
194 }