midori/extensions/feed-panel/feed-rss.c

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/*
Copyright (C) 2009 Dale Whittaker <dayul@users.sf.net>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
See the file COPYING for the full license text.
*/
#include "feed-rss.h"
static gboolean
rss_is_valid (FeedParser* fparser)
{
xmlNodePtr node;
xmlNodePtr child;
xmlChar* str;
gboolean valid;
node = fparser->node;
if (!(xmlStrcmp (node->name, BAD_CAST "rss")))
{
if ((str = xmlGetProp (node, BAD_CAST "version")))
{
valid = !xmlStrcmp (str, BAD_CAST "2.0");
xmlFree (str);
if (valid)
{
child = node->children;
while (child)
{
if (child->type == XML_ELEMENT_NODE &&
!(xmlStrcmp (child->name, BAD_CAST "channel")))
{
fparser->node = child;
return TRUE;
}
child = child->next;
}
feed_parser_set_error (fparser, FEED_PARSE_ERROR_MISSING_ELEMENT,
_("Failed to find \"channel\" element in RSS XML data."));
}
else
{
feed_parser_set_error (fparser, FEED_PARSE_ERROR_INVALID_VERSION,
_("Unsupported RSS version found."));
}
}
}
return FALSE;
}
static gboolean
rss_update (FeedParser* fparser)
{
xmlNodePtr node;
xmlNodePtr child;
gint64 date;
gint64 newdate;
date = katze_item_get_added (fparser->item);
node = fparser->node;
child = node->children;
while (child)
{
if (child->type == XML_ELEMENT_NODE)
{
if (!(xmlStrcmp (child->name, BAD_CAST "lastBuildDate")))
{
fparser->node = child;
newdate = feed_get_element_date (fparser);
fparser->node = node;
return (date != newdate);
}
}
child = child->next;
}
return TRUE;
}
static void
rss_preparse_item (FeedParser* fparser)
{
fparser->item = katze_item_new ();
}
static void
rss_parse_item (FeedParser* fparser)
{
xmlNodePtr node;
gchar* content;
gint64 date;
node = fparser->node;
content = NULL;
if (!xmlStrcmp (node->name, BAD_CAST "guid"))
{
content = feed_get_element_string (fparser);
katze_item_set_token (fparser->item, content);
}
else if (!xmlStrcmp (node->name, BAD_CAST "title"))
{
content = feed_get_element_markup (fparser);
katze_item_set_name (fparser->item, content);
}
else if (!xmlStrcmp (node->name, BAD_CAST "description"))
{
content = feed_get_element_string (fparser);
katze_item_set_text (fparser->item, content);
}
else if (!xmlStrcmp (node->name, BAD_CAST "pubDate"))
{
date = feed_get_element_date (fparser);
katze_item_set_added (fparser->item, date);
}
else if (!(xmlStrcmp (node->name, BAD_CAST "link")))
{
content = feed_get_element_string (fparser);
katze_item_set_uri (fparser->item, content);
}
g_free (content);
}
static void
rss_postparse_item (FeedParser* fparser)
{
if (!*fparser->error)
{
/*
* Verify that the required RSS elements are added
* (as per the spec)
*/
if (!katze_item_get_name (fparser->item))
{
gchar* desc;
desc = (gchar*)katze_item_get_text (fparser->item);
if (!desc)
{
feed_parser_set_error (fparser, FEED_PARSE_ERROR_MISSING_ELEMENT,
_("Failed to find required RSS \"item\" elements in XML data."));
}
else
{
desc = feed_remove_markup (g_strdup (desc));
if (desc)
{
katze_item_set_name (fparser->item, desc);
g_free (desc);
}
else
{
if ((desc = (gchar*)katze_item_get_uri (fparser->item)))
katze_item_set_name (fparser->item, desc);
}
}
}
}
if (*fparser->error && KATZE_IS_ITEM (fparser->item))
{
g_object_unref (fparser->item);
fparser->item = NULL;
}
}
static void
rss_parse_channel (FeedParser* fparser)
{
FeedParser* eparser;
xmlNodePtr node;
gchar* content;
gint64 date;
node = fparser->node;
content = NULL;
if (!xmlStrcmp (node->name, BAD_CAST "title"))
{
content = feed_get_element_markup (fparser);
katze_item_set_name (fparser->item, content);
}
else if (!xmlStrcmp (node->name, BAD_CAST "description"))
{
content = feed_get_element_string (fparser);
katze_item_set_text (fparser->item, content);
}
else if (!xmlStrcmp (node->name, BAD_CAST "lastBuildDate"))
{
date = feed_get_element_date (fparser);
katze_item_set_added (fparser->item, date);
}
else if (!(xmlStrcmp (node->name, BAD_CAST "link")))
{
content = feed_get_element_string (fparser);
katze_item_set_uri (fparser->item, content);
}
else if (!xmlStrcmp (node->name, BAD_CAST "item"))
{
eparser = g_new0 (FeedParser, 1);
eparser->doc = fparser->doc;
eparser->node = fparser->node;
eparser->error = fparser->error;
eparser->preparse = rss_preparse_item;
eparser->parse = rss_parse_item;
eparser->postparse = rss_postparse_item;
feed_parse_node (eparser);
if (KATZE_IS_ITEM (eparser->item))
{
KatzeItem* item;
if (!(item = feed_item_exists (KATZE_ARRAY (fparser->item), eparser->item)))
katze_array_add_item (KATZE_ARRAY (fparser->item), eparser->item);
else
{
g_object_unref (eparser->item);
katze_array_move_item (KATZE_ARRAY (fparser->item), item, 0);
}
}
g_free (eparser);
}
g_free (content);
}
static void
rss_postparse_channel (FeedParser* fparser)
{
if (!*fparser->error)
{
/*
* Verify that the required RSS elements are added
* (as per the spec)
*/
if (!katze_item_get_name (fparser->item) ||
!katze_item_get_text (fparser->item) ||
!katze_item_get_uri (fparser->item))
{
feed_parser_set_error (fparser, FEED_PARSE_ERROR_MISSING_ELEMENT,
_("Failed to find required RSS \"channel\" elements in XML data."));
}
}
}
FeedParser*
rss_init_parser (void)
{
FeedParser* fparser;
fparser = g_new0 (FeedParser, 1);
g_return_val_if_fail (fparser, NULL);
fparser->isvalid = rss_is_valid;
fparser->update = rss_update;
fparser->parse = rss_parse_channel;
fparser->postparse = rss_postparse_channel;
return fparser;
}