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 "feed.h"
  26 #include "date.h"
  27 #include "parser_rdf.h"
  28
  29 void feed_parser_rdf_start(void *data, const gchar *el, const gchar **attr)
  30 {
  31         FeedParserCtx *ctx = (FeedParserCtx *)data;
  32
  33         if( ctx->depth == 1 ) {
  34                 if( !strcmp(el, "channel") ) {
  35                         ctx->location = FEED_LOC_RDF_CHANNEL;
  36                 } else if( !strcmp(el, "item") ) {
  37
  38                         if( ctx->curitem != NULL )
  39                                 feed_item_free(ctx->curitem);
  40
  41                         ctx->curitem = feed_item_new(ctx->feed);
  42                         ctx->location = FEED_LOC_RDF_ITEM;
  43
  44                 } else ctx->location = 0;
  45         }
  46
  47         ctx->depth++;
  48
  49 }
  50
  51 void feed_parser_rdf_end(void *data, const gchar *el)
  52 {
  53         FeedParserCtx *ctx = (FeedParserCtx *)data;
  54         Feed *feed = ctx->feed;
  55         gchar *text = NULL;
  56
  57         if( ctx->str != NULL )
  58                 text = ctx->str->str;
  59         else
  60                 text = "";
  61
  62         ctx->depth--;
  63
  64         switch( ctx->depth ) {
  65
  66                 case 0:
  67
  68                         if( !strcmp(el, "rdf") ) {
  69                                 /* we finished parsing the feed */
  70                                 ctx->feed->items = g_slist_reverse(ctx->feed->items);
  71                         }
  72
  73                         break;
  74
  75                 case 1:
  76
  77                         /* <item></item> block just ended, so ... */
  78                         if( !strcmp(el, "item") ) {
  79
  80                                 /* add the complete feed item to our feed struct */
  81                                 ctx->feed->items =
  82                                         g_slist_prepend(ctx->feed->items, (gpointer)ctx->curitem);
  83
  84                                 /* since it's in the linked list, lose this pointer */
  85                                 ctx->curitem = NULL;
  86                         }
  87
  88                         break;
  89
  90                 case 2:
  91
  92                         switch(ctx->location) {
  93
  94                                 /* We're inside introductory <channel></channel> */
  95                                 case FEED_LOC_RDF_CHANNEL:
  96                                         if( !strcmp(el, "title") ) {
  97                                                 FILL(feed->title)
  98                                         } else if( !strcmp(el, "description" ) ) {
  99                                                 FILL(feed->description)
 100                                         } else if( !strcmp(el, "dc:language") ) {
 101                                                 FILL(feed->language)
 102                                         } else if( !strcmp(el, "dc:creator") ) {
 103                                                 FILL(feed->author)
 104                                         } else if( !strcmp(el, "dc:date") ) {
 105                                                 feed->date = parseISO8601Date(text);
 106                                         } else if( !strcmp(el, "pubDate") ) {
 107                                                 feed->date = parseRFC822Date(text);
 108                                         }
 109
 110                                         break;
 111
 112                                 /* We're inside an <item></item> */
 113                                 case FEED_LOC_RDF_ITEM:
 114                                         if( ctx->curitem == NULL ) {
 115                                                 break;
 116                                         }
 117
 118                                         /* decide which field did we just get */
 119                                         if( !strcmp(el, "title") ) {
 120                                                 FILL(ctx->curitem->title)
 121                                         } else if( !strcmp(el, "dc:creator") ) {
 122                                                 FILL(ctx->curitem->author)
 123                                         } else if( !strcmp(el, "description") ) {
 124                                                 FILL(ctx->curitem->summary)
 125                                         } else if( !strcmp(el, "content:encoded") ) {
 126                                                 FILL(ctx->curitem->text)
 127                                         } else if( !strcmp(el, "link") ) {
 128                                                 FILL(ctx->curitem->url)
 129                                         } else if( !strcmp(el, "dc:date") ) {
 130                                                 ctx->curitem->date_modified = parseISO8601Date(text);
 131                                         } else if( !strcmp(el, "pubDate") ) {
 132                                                 ctx->curitem->date_modified = parseRFC822Date(text);
 133                                         }
 134
 135                                         break;
 136                         }
 137
 138                         break;
 139
 140         }
 141
 142         if( ctx->str != NULL ) {
 143                 g_string_free(ctx->str, TRUE);
 144                 ctx->str = NULL;
 145         }
 146 }