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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/*
* GData Client
* Copyright (C) Philip Withnall 2010 <philip@tecnocode.co.uk>
*
* GData Client 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.
*
* GData Client is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with GData Client. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* SECTION:gdata-batch-feed
* @short_description: GData batch feed helper object
* @stability: Unstable
* @include: gdata/gdata-batch-feed.h
*
* Helper class to parse the feed returned from a batch operation and instantiate different types of #GDataEntry according to the batch operation
* associated with each one. It's tightly coupled with #GDataBatchOperation, and isn't exposed publicly.
*
* For more information, see the <ulink type="http" url="http://code.google.com/apis/gdata/docs/batch.html">online documentation</ulink>.
*
* Since: 0.7.0
*/
#include <glib.h>
#include <gxml.h>
#include "gdata-batch-feed.h"
#include "gdata-private.h"
#include "gdata-batch-private.h"
static gboolean parse_xml (GDataParsable *parsable, GXmlDomDocument *doc, GXmlDomXNode *root_node, gpointer user_data, GError **error);
G_DEFINE_TYPE (GDataBatchFeed, gdata_batch_feed, GDATA_TYPE_FEED)
static void
gdata_batch_feed_class_init (GDataBatchFeedClass *klass)
{
GDataParsableClass *parsable_class = GDATA_PARSABLE_CLASS (klass);
parsable_class->parse_xml = parse_xml;
}
static void
gdata_batch_feed_init (GDataBatchFeed *self)
{
/* Nothing to see here */
}
static gboolean
parse_xml (GDataParsable *parsable, GXmlDomDocument *doc, GXmlDomXNode *node, gpointer user_data, GError **error)
{
GDataBatchOperation *operation = GDATA_BATCH_OPERATION (user_data);
if (g_strcmp0 (gxml_dom_xnode_get_node_name (node), "entry") == 0) {
GDataEntry *entry = NULL;
gchar *status_response = g_strdup ("");
gchar *status_response_new = NULL;
gchar *status_reason = NULL;
guint id = 0, status_code = 0;
GXmlDomXNode *entry_node;
BatchOperation *op;
const gchar *entry_node_name;
/* Parse the child nodes of the <entry> to get the batch namespace elements containing information about this operation */
for (entry_node = gxml_dom_xnode_get_first_child (node); entry_node != NULL; entry_node = gxml_dom_xnode_get_next_sibling (entry_node)) {
/* We have to be careful about namespaces here, and we can skip text nodes (since none of the nodes we're looking for
* are text nodes) */
if (gxml_dom_xnode_get_node_type (entry_node) == GXML_DOM_NODE_TYPE_TEXT || // < TODO:GXML: consider using GXML_DOM_IS_TEXT, but then subclasses (CDATASection) would match? want that?
gdata_parser_is_namespace (entry_node, "http://schemas.google.com/gdata/batch") == FALSE)
continue;
entry_node_name = gxml_dom_xnode_get_node_name (entry_node);
if (g_strcmp0 (entry_node_name, "id") == 0) {
/* batch:id */
gchar *id_string = gxml_dom_node_list_to_string (gxml_dom_xnode_get_child_nodes (entry_node), TRUE);
id = strtoul ((char*) id_string, NULL, 10);
g_free (id_string); // TODO:GXML: do we want to be freeing this?
} else if (g_strcmp0 (entry_node_name, "status") == 0) {
/* batch:status */
gchar *status_code_string;
GXmlDomXNode *child_node;
status_code_string = gxml_dom_element_get_attribute (GXML_DOM_ELEMENT (entry_node), "code");
status_code = strtoul ((char*) status_code_string, NULL, 10);
g_free (status_code_string); // TODO:GXML: do we want to free this?
status_reason = gxml_dom_element_get_attribute (GXML_DOM_ELEMENT (entry_node), "reason");
/* Dump the content of the status node, since it's service-specific, and could be anything from plain text to XML */
for (child_node = gxml_dom_xnode_get_first_child (entry_node); child_node != NULL; child_node = gxml_dom_xnode_get_next_sibling (child_node)) {
status_response_new = g_strconcat (status_response, gxml_dom_xnode_to_string (child_node, 0, 0), NULL); // TODO:GXML: want to use a string building thing like gstring
g_free (status_response);
status_response = status_response_new;
}
}
if (id != 0 && status_code != 0)
break;
}
/* Check we've got all the required data */
if (id == 0) {
gdata_parser_error_required_element_missing ("batch:id", "entry", error);
goto error;
} else if (status_code == 0) {
gdata_parser_error_required_element_missing ("batch:status", "entry", error);
goto error;
}
op = _gdata_batch_operation_get_operation (operation, id);
/* Check for errors */
if (SOUP_STATUS_IS_SUCCESSFUL (status_code) == FALSE) {
/* Handle the error */
GDataService *service = gdata_batch_operation_get_service (operation);
GDataServiceClass *klass = GDATA_SERVICE_GET_CLASS (service);
GError *child_error = NULL;
/* Parse the error (it's returned in a service-specific format */
g_assert (klass->parse_error_response != NULL);
klass->parse_error_response (service, op->type, status_code, status_reason, status_response,
strlen (status_response), &child_error);
/* Run the operation's callback. This takes ownership of @child_error. */
_gdata_batch_operation_run_callback (operation, op, NULL, child_error);
g_free (status_reason);
g_free (status_response);
/* We return TRUE because we parsed the XML successfully; despite it being an error that we parsed */
return TRUE;
}
/* If there wasn't an error, parse the resulting GDataEntry and run the operation's callback */
if (op->type == GDATA_BATCH_OPERATION_QUERY)
entry = GDATA_ENTRY (_gdata_parsable_new_from_xml_node (op->entry_type, doc, node, NULL, error));
else if (op->type != GDATA_BATCH_OPERATION_DELETION)
entry = GDATA_ENTRY (_gdata_parsable_new_from_xml_node (G_OBJECT_TYPE (op->entry), doc, node, NULL, error));
if (op->type != GDATA_BATCH_OPERATION_DELETION && entry == NULL)
goto error;
_gdata_batch_operation_run_callback (operation, op, entry, NULL);
if (entry != NULL)
g_object_unref (entry);
g_free (status_reason);
g_free (status_response);
return TRUE;
error:
g_free (status_reason);
g_free (status_response);
return FALSE;
} else if (GDATA_PARSABLE_CLASS (gdata_batch_feed_parent_class)->parse_xml (parsable, doc, node, user_data, error) == FALSE) {
/* Error! */
return FALSE;
}
return TRUE;
}
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