Movie Info Provider: Added XML parsing

[maevies] / src / mvs-minfo-provider.c

diff --git a/src/mvs-minfo-provider.c b/src/mvs-minfo-provider.c
index 868ae01..9b22675 100644 (file)
--- a/src/mvs-minfo-provider.c
+++ b/src/mvs-minfo-provider.c
@@ -18,11 +18,15 @@
 
 #include "mvs-minfo-provider.h"
 
+#include <libxml/parser.h>
+#include <libxml/xpath.h>
+
 #define TMDB_API_KEY "249e1a42df9bee09fac5e92d3a51396b"
 #define TMDB_LANGUAGE "en"
 #define TMDB_FORMAT "xml"
 #define TMDB_METHOD "Movie.search"
 #define TMDB_BASE_URL "http://api.themoviedb.org/2.1/%s/%s/%s/%s/%s"
+#define TMDB_MOVIE_XPATH "/OpenSearchDescription/movies/movie"
 
 G_DEFINE_TYPE (MvsMInfoProvider, mvs_minfo_provider, G_TYPE_OBJECT)
 
@@ -38,6 +42,15 @@ struct _MvsMInfoProviderPrivate {
         gchar *format;
 };
 
+enum {
+        RESPONSE_RECEIVED,
+        LAST_SIGNAL
+};
+
+static guint
+signals[LAST_SIGNAL] = { 0 };
+
+
 static void
 mvs_minfo_provider_get_property (GObject *object, guint property_id,
                          GValue *value, GParamSpec *pspec)
@@ -96,6 +109,15 @@ mvs_minfo_provider_class_init (MvsMInfoProviderClass *klass)
                                       TMDB_FORMAT,
                                       G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
 
+        signals[RESPONSE_RECEIVED] = g_signal_new ("response-received", MVS_TYPE_MINFO_PROVIDER,
+                        G_SIGNAL_RUN_LAST,
+                        0,
+                        NULL,
+                        NULL,
+                        g_cclosure_marshal_VOID__VOID,
+                        G_TYPE_NONE,
+                        0,
+                        NULL);
 }
 
 static void
@@ -111,11 +133,120 @@ mvs_minfo_provider_new (void)
         return g_object_new (MVS_TYPE_MINFO_PROVIDER, NULL);
 }
 
+static void
+display_movie_info (xmlNodePtr node)
+{
+        xmlNodePtr cur_node = NULL;
+
+        for (cur_node = node; cur_node; cur_node = cur_node->next) {
+                if (cur_node->type == XML_ELEMENT_NODE) {
+                        gchar *value = xmlNodeGetContent (cur_node);
+                        g_print ("[%s] = %s\n", cur_node->name, value);
+                }
+        }
+}
+
+static void
+iterate_list (xmlNodeSetPtr node_set)
+{
+        int i = 0;
+
+        for (i = 0; i < node_set->nodeNr; i++) {
+                xmlNodePtr node = node_set->nodeTab[i];
+                if (node->type == XML_ELEMENT_NODE) {
+                        display_movie_info (node->children);
+                }
+        }
+}
+
+static void
+parse_xml (const char *xml_data, goffset length)
+{
+        xmlDocPtr document = xmlReadMemory (xml_data, length,
+                        NULL,
+                        NULL,
+                        XML_PARSE_NOBLANKS | XML_PARSE_RECOVER);
+        g_return_if_fail (document);
+
+        xmlXPathContextPtr context_ptr = xmlXPathNewContext (document);
+
+        xmlXPathObjectPtr xpath_obj =
+                        xmlXPathEvalExpression (TMDB_MOVIE_XPATH, context_ptr);
+
+        xmlNodeSetPtr nodeset = xpath_obj->nodesetval;
+
+        if (nodeset->nodeNr > 0) {
+                iterate_list (nodeset);
+        }
+
+        xmlXPathFreeNodeSetList (xpath_obj);
+        xmlXPathFreeContext (context_ptr);
+        xmlFreeDoc (document);
+}
+
+static void
+response_callback (SoupSession *session, SoupMessage *message,
+                    gpointer user_data)
+{
+        MvsMInfoProvider *self = MVS_MINFO_PROVIDER (user_data);
+        const gchar *mime = NULL;
+
+        if (!SOUP_STATUS_IS_SUCCESSFUL (message->status_code) ||
+                        message->response_body->length <= 0) {
+
+                g_print ("%s\n", message->reason_phrase);
+        }
+        else {
+
+                mime = soup_message_headers_get_content_type
+                                (message->response_headers, NULL);
+
+                parse_xml (message->response_body->data,
+                           message->response_body->length);
+        }
+
+        g_signal_emit (self, signals[RESPONSE_RECEIVED], 0);
+}
+
+static gchar *
+get_query_uri (MvsMInfoProvider *self, const char *query)
+{
+        /* METHOD/LANGUAGE/FORMAT/APIKEY/MOVIENAME */
+        gchar *uri = g_strdup_printf (TMDB_BASE_URL, TMDB_METHOD,
+                        TMDB_LANGUAGE,
+                        self->priv->format,
+                        TMDB_API_KEY,
+                        query);
+
+        return uri;
+}
+
 gboolean
 mvs_minfo_provider_query (MvsMInfoProvider *self,
                           const gchar *query)
 {
-        return FALSE;
+        g_return_val_if_fail (MVS_IS_MINFO_PROVIDER (self), FALSE);
+
+        SoupSession *session = NULL;
+        SoupMessage *message = NULL;
+        gboolean message_queued = FALSE;
+
+        gchar *uri = get_query_uri (self, query);
+
+        g_return_val_if_fail (uri, FALSE);
+
+        session = soup_session_async_new ();
+        message = soup_message_new ("GET", uri);
+
+        if (message) {
+                soup_session_queue_message (session, message,
+                                response_callback, self);
+                message_queued = TRUE;
+        }
+
+        g_free (uri);
+
+        return message_queued;
 }
 
 gboolean