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 enum {
  32         FEED_LOC_RDF_NONE,
  33         FEED_LOC_RDF_CHANNEL,
  34         FEED_LOC_RDF_ITEM
  35 } FeedRdfLocations;
  36
  37 void feed_parser_rdf_start(void *data, const gchar *el, const gchar **attr)
  38 {
  39         FeedParserCtx *ctx = (FeedParserCtx *)data;
  40
  41         if( ctx->depth == 1 ) {
  42                 if( !strcmp(el, "channel") ) {
  43                         ctx->location = FEED_LOC_RDF_CHANNEL;
  44                 } else if( !strcmp(el, "item") ) {
  45
  46                         if( ctx->curitem != NULL )
  47                                 feed_item_free(ctx->curitem);
  48
  49                         ctx->curitem = feed_item_new(ctx->feed);
  50                         ctx->location = FEED_LOC_RDF_ITEM;
  51
  52                 } else ctx->location = 0;
  53         }
  54
  55         ctx->depth++;
  56
  57 }
  58
  59 void feed_parser_rdf_end(void *data, const gchar *el)
  60 {
  61         FeedParserCtx *ctx = (FeedParserCtx *)data;
  62         Feed *feed = ctx->feed;
  63         gchar *text = NULL;
  64
  65         if( ctx->str != NULL )
  66                 text = g_strstrip(g_strdup(ctx->str->str));
  67         else
  68                 text = "";
  69
  70         ctx->depth--;
  71
  72         switch( ctx->depth ) {
  73
  74                 case 0:
  75
  76                         if( !strcmp(el, "rdf") ) {
  77                                 /* we finished parsing the feed */
  78                                 ctx->feed->items = g_slist_reverse(ctx->feed->items);
  79                         }
  80
  81                         break;
  82
  83                 case 1:
  84
  85                         /* <item></item> block just ended, so ... */
  86                         if( !strcmp(el, "item") ) {
  87
  88                                 /* add the complete feed item to our feed struct */
  89                                 ctx->feed->items =
  90                                         g_slist_prepend(ctx->feed->items, (gpointer)ctx->curitem);
  91
  92                                 /* since it's in the linked list, lose this pointer */
  93                                 ctx->curitem = NULL;
  94                         }
  95
  96                         break;
  97
  98                 case 2:
  99
 100                         switch(ctx->location) {
 101
 102                                 /* We're inside introductory <channel></channel> */
 103                                 case FEED_LOC_RDF_CHANNEL:
 104                                         if( !strcmp(el, "title") ) {
 105                                                 FILL(feed->title)
 106                                         } else if( !strcmp(el, "description" ) ) {
 107                                                 FILL(feed->description)
 108                                         } else if( !strcmp(el, "dc:language") ) {
 109                                                 FILL(feed->language)
 110                                         } else if( !strcmp(el, "dc:creator") ) {
 111                                                 FILL(feed->author)
 112                                         } else if( !strcmp(el, "dc:date") ) {
 113                                                 feed->date = procheader_date_parse(NULL, text, 0);
 114                                         } else if( !strcmp(el, "pubDate") ) {
 115                                                 feed->date = procheader_date_parse(NULL, text, 0);
 116                                         }
 117
 118                                         break;
 119
 120                                 /* We're inside an <item></item> */
 121                                 case FEED_LOC_RDF_ITEM:
 122                                         if( ctx->curitem == NULL ) {
 123                                                 break;
 124                                         }
 125
 126                                         /* decide which field did we just get */
 127                                         if( !strcmp(el, "title") ) {
 128                                                 FILL(ctx->curitem->title)
 129                                         } else if( !strcmp(el, "dc:creator") ) {
 130                                                 FILL(ctx->curitem->author)
 131                                         } else if( !strcmp(el, "description") ) {
 132                                                 FILL(ctx->curitem->summary)
 133                                         } else if( !strcmp(el, "content:encoded") ) {
 134                                                 FILL(ctx->curitem->text)
 135                                         } else if( !strcmp(el, "link") ) {
 136                                                 FILL(ctx->curitem->url)
 137                                         } else if( !strcmp(el, "dc:date") ) {
 138                                                 ctx->curitem->date_modified = procheader_date_parse(NULL, text, 0);
 139                                         } else if( !strcmp(el, "pubDate") ) {
 140                                                 ctx->curitem->date_modified = procheader_date_parse(NULL, text, 0);
 141                                         }
 142
 143                                         break;
 144                         }
 145
 146                         break;
 147
 148         }
 149
 150         if( ctx->str != NULL ) {
 151                 g_free(text);
 152                 g_string_free(ctx->str, TRUE);
 153                 ctx->str = NULL;
 154         }
 155 }