src/plugins/rssyl/libfeed/parser_rdf.c

   1 /*
   2  * Copyright (C) 2006 Andrej Kacian <andrej@kacian.sk>
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License as
   6  * published by the Free Software Foundation; either version 2 of the
   7  * License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public
  15  * License along with this program; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19 #define __USE_GNU
  20
  21 #include <glib.h>
  22 #include <expat.h>
  23 #include <string.h>
  24
  25 #include <procheader.h>
  26
  27 #include "feed.h"
  28 #include "date.h"
  29 #include "parser_rdf.h"
  30
  31 void feed_parser_rdf_start(void *data, const gchar *el, const gchar **attr)
  32 {
  33         FeedParserCtx *ctx = (FeedParserCtx *)data;
  34
  35         if( ctx->depth == 1 ) {
  36                 if( !strcmp(el, "channel") ) {
  37                         ctx->location = FEED_LOC_RDF_CHANNEL;
  38                 } else if( !strcmp(el, "item") ) {
  39
  40                         if( ctx->curitem != NULL )
  41                                 feed_item_free(ctx->curitem);
  42
  43                         ctx->curitem = feed_item_new(ctx->feed);
  44                         ctx->location = FEED_LOC_RDF_ITEM;
  45
  46                 } else ctx->location = 0;
  47         }
  48
  49         ctx->depth++;
  50
  51 }
  52
  53 void feed_parser_rdf_end(void *data, const gchar *el)
  54 {
  55         FeedParserCtx *ctx = (FeedParserCtx *)data;
  56         Feed *feed = ctx->feed;
  57         gchar *text = NULL;
  58
  59         if( ctx->str != NULL )
  60                 text = g_strstrip(g_strdup(ctx->str->str));
  61         else
  62                 text = "";
  63
  64         ctx->depth--;
  65
  66         switch( ctx->depth ) {
  67
  68                 case 0:
  69
  70                         if( !strcmp(el, "rdf") ) {
  71                                 /* we finished parsing the feed */
  72                                 ctx->feed->items = g_slist_reverse(ctx->feed->items);
  73                         }
  74
  75                         break;
  76
  77                 case 1:
  78
  79                         /* <item></item> block just ended, so ... */
  80                         if( !strcmp(el, "item") ) {
  81
  82                                 /* add the complete feed item to our feed struct */
  83                                 ctx->feed->items =
  84                                         g_slist_prepend(ctx->feed->items, (gpointer)ctx->curitem);
  85
  86                                 /* since it's in the linked list, lose this pointer */
  87                                 ctx->curitem = NULL;
  88                         }
  89
  90                         break;
  91
  92                 case 2:
  93
  94                         switch(ctx->location) {
  95
  96                                 /* We're inside introductory <channel></channel> */
  97                                 case FEED_LOC_RDF_CHANNEL:
  98                                         if( !strcmp(el, "title") ) {
  99                                                 FILL(feed->title)
 100                                         } else if( !strcmp(el, "description" ) ) {
 101                                                 FILL(feed->description)
 102                                         } else if( !strcmp(el, "dc:language") ) {
 103                                                 FILL(feed->language)
 104                                         } else if( !strcmp(el, "dc:creator") ) {
 105                                                 FILL(feed->author)
 106                                         } else if( !strcmp(el, "dc:date") ) {
 107                                                 feed->date = parseISO8601Date(text);
 108                                         } else if( !strcmp(el, "pubDate") ) {
 109                                                 feed->date = procheader_date_parse(NULL, text, 0);
 110                                         }
 111
 112                                         break;
 113
 114                                 /* We're inside an <item></item> */
 115                                 case FEED_LOC_RDF_ITEM:
 116                                         if( ctx->curitem == NULL ) {
 117                                                 break;
 118                                         }
 119
 120                                         /* decide which field did we just get */
 121                                         if( !strcmp(el, "title") ) {
 122                                                 FILL(ctx->curitem->title)
 123                                         } else if( !strcmp(el, "dc:creator") ) {
 124                                                 FILL(ctx->curitem->author)
 125                                         } else if( !strcmp(el, "description") ) {
 126                                                 FILL(ctx->curitem->summary)
 127                                         } else if( !strcmp(el, "content:encoded") ) {
 128                                                 FILL(ctx->curitem->text)
 129                                         } else if( !strcmp(el, "link") ) {
 130                                                 FILL(ctx->curitem->url)
 131                                         } else if( !strcmp(el, "dc:date") ) {
 132                                                 ctx->curitem->date_modified = parseISO8601Date(text);
 133                                         } else if( !strcmp(el, "pubDate") ) {
 134                                                 ctx->curitem->date_modified = procheader_date_parse(NULL, text, 0);
 135                                         }
 136
 137                                         break;
 138                         }
 139
 140                         break;
 141
 142         }
 143
 144         if( ctx->str != NULL ) {
 145                 g_free(text);
 146                 g_string_free(ctx->str, TRUE);
 147                 ctx->str = NULL;
 148         }
 149 }