/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */

/*

 * GData Client

 * Copyright (C) Thibault Saunier 2009 <saunierthibault@gmail.com>

 * Copyright (C) Philip Withnall 2010 <philip@tecnocode.co.uk>

 * Copyright (C) Red Hat, Inc. 2015

 *

 * 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-documents-feed

 * @short_description: GData documents feed object

 * @stability: Stable

 * @include: gdata/services/documents/gdata-documents-feed.h

 *

 * #GDataDocumentsFeed is a list of entries (#GDataDocumentsEntry subclasses) returned as the result of a query to a #GDataDocumentsService,

 * or given as the input to another operation on the online service.

 *

 * Each #GDataDocumentsEntry represents a single object on the Google Documents online service, such as a text document, presentation document,

 * spreadsheet document or a folder, and the #GDataDocumentsFeed represents a collection of those objects.

 *

 * Since: 0.4.0

 */

#include <config.h>

#include <glib.h>

#include <glib/gi18n-lib.h>

#include <string.h>

#include "gdata-documents-feed.h"

#include "gdata-documents-utils.h"

#include "gdata-types.h"

#include "gdata-private.h"

#include "gdata-service.h"

static gboolean parse_json (GDataParsable *parsable, JsonReader *reader, gpointer user_data, GError **error);

G_DEFINE_TYPE (GDataDocumentsFeed, gdata_documents_feed, GDATA_TYPE_FEED)

static void

gdata_documents_feed_class_init (GDataDocumentsFeedClass *klass)

{

	GDataParsableClass *parsable_class = GDATA_PARSABLE_CLASS (klass);

	parsable_class->parse_json = parse_json;

}

static void

gdata_documents_feed_init (GDataDocumentsFeed *self)

{

	/* Why am I writing it? */

}

static void

get_kind_and_mime_type (JsonReader *reader, gchar **out_kind, gchar **out_mime_type, GError **error)

{

	GError *child_error = NULL;

	gboolean success;

	gchar *kind = NULL;

	gchar *mime_type = NULL;

	guint i, members;

	for (i = 0, members = (guint) json_reader_count_members (reader); i < members; i++) {

		json_reader_read_element (reader, i);

		if (gdata_parser_string_from_json_member (reader, "kind", P_REQUIRED | P_NON_EMPTY, &kind, &success, &child_error) == TRUE) {

			if (!success && child_error != NULL) {

				g_propagate_prefixed_error (error, child_error,

				                            /* Translators: the parameter is an error message */

				                            _("Error parsing JSON: %s"),

				                            "Failed to find ‘kind’.");

				json_reader_end_element (reader);

				goto out;

			}

		}

		if (gdata_parser_string_from_json_member (reader, "mimeType", P_DEFAULT, &mime_type, &success, &child_error) == TRUE) {

			if (!success && child_error != NULL) {

				g_propagate_prefixed_error (error, child_error,

				                            /* Translators: the parameter is an error message */

				                            _("Error parsing JSON: %s"),

				                            "Failed to find ‘mimeType’.");

				json_reader_end_element (reader);

				goto out;

			}

		}

		json_reader_end_element (reader);

	}

	if (out_kind != NULL) {

		*out_kind = kind;

		kind = NULL;

	}

	if (out_mime_type != NULL) {

		*out_mime_type = mime_type;

		mime_type = NULL;

	}

 out:

	g_free (kind);

	g_free (mime_type);

}

static gboolean

parse_json (GDataParsable *parsable, JsonReader *reader, gpointer user_data, GError **error)

{

	/* JSON format: https://developers.google.com/drive/v2/reference/files/list */

	if (g_strcmp0 (json_reader_get_member_name (reader), "items") == 0) {

		gboolean success = TRUE;

		guint i, elements;

		if (json_reader_is_array (reader) == FALSE) {

			g_set_error (error, GDATA_SERVICE_ERROR, GDATA_SERVICE_ERROR_PROTOCOL_ERROR,

			             /* Translators: the parameter is an error message */

			             _("Error parsing JSON: %s"),

			             "JSON node ‘items’ is not an array.");

			return FALSE;

		}

		/* Loop through the elements array. */

		for (i = 0, elements = (guint) json_reader_count_elements (reader); success && i < elements; i++) {

			GDataEntry *entry = NULL;

			GError *child_error = NULL;

			GType entry_type = G_TYPE_INVALID;

			gchar *kind = NULL;

			gchar *mime_type = NULL;

			json_reader_read_element (reader, i);

			if (json_reader_is_object (reader) == FALSE) {

				g_set_error (error, GDATA_SERVICE_ERROR, GDATA_SERVICE_ERROR_PROTOCOL_ERROR,

				             /* Translators: the parameter is an error message */

				             _("Error parsing JSON: %s"),

				             "JSON node inside ‘items’ is not an object");

				success = FALSE;

				goto continuation;

			}

			get_kind_and_mime_type (reader, &kind, &mime_type, &child_error);

			if (child_error != NULL) {

				g_propagate_error (error, child_error);

				success = FALSE;

				goto continuation;

			}

			if (g_strcmp0 (kind, "drive#file") == 0) {

				entry_type = gdata_documents_utils_get_type_from_content_type (mime_type);

			} else {

				g_warning ("%s files are not handled yet", kind);

			}

			if (entry_type == G_TYPE_INVALID)

				goto continuation;

			entry = GDATA_ENTRY (_gdata_parsable_new_from_json_node (entry_type, reader, NULL, error));

			/* Call the progress callback in the main thread */

			_gdata_feed_call_progress_callback (GDATA_FEED (parsable), user_data, entry);

			_gdata_feed_add_entry (GDATA_FEED (parsable), entry);

		continuation:

			g_clear_object (&entry);

			g_free (kind);

			g_free (mime_type);

			json_reader_end_element (reader);

		}

		return success;

	}

	return GDATA_PARSABLE_CLASS (gdata_documents_feed_parent_class)->parse_json (parsable, reader, user_data, error);

}