new function. (query_backend_get_uids): new function. (query_backend_new):

2002-08-05  Rodrigo Moya <rodrigo@ximian.com>

	* pcs/query-backend.[ch] (query_backend_get_object_component): new
	function.
	(query_backend_get_uids): new function.
	(query_backend_new): create the static GHashTable if it hasn't been
	created yet.
	(query_backend_destroy): destroy the static GHashTable if empty.
	(foreach_uid_cb): call object_updated_cb, which does everything.

	* pcs/query.c: make use of the new QueryBackend class.
	(query_init): initialize new private structure member.
	(query_destroy): clean up new member, without freeing it, since it is
	managed internally in query-backend.c.
	(query_construct): create a QueryBackend for the query.

svn path=/trunk/; revision=17713

3 files changed, 123 insertions, 15 deletions

diff --git a/calendar/pcs/query-backend.c b/calendar/pcs/query-backend.c
index d3ec5a761d..651138fa03 100644
--- a/calendar/pcs/query-backend.c
+++ b/calendar/pcs/query-backend.c
@@ -75,6 +75,13 @@ query_backend_init (QueryBackend *qb)
 	priv->queries = NULL;
 }
 
+static void
+free_hash_comp_cb (gpointer key, gpointer value, gpointer user_data)
+{
+	g_free (key);
+	gtk_object_unref (GTK_OBJECT (value));
+}
+
 /* Destroy handler for the backend cache */
 static void
 query_backend_destroy (GtkObject *object)
@@ -86,6 +93,10 @@ query_backend_destroy (GtkObject *object)
 
 	/* remove the QueryBackend from the internal hash table */
 	g_hash_table_remove (loaded_backends, qb->priv->uri);
+	if (g_hash_table_size (loaded_backends) == 0) {
+		g_hash_table_destroy (loaded_backends);
+		loaded_backends = NULL;
+	}
 
 	/* free memory */
 	qb->priv->backend = NULL;
@@ -93,6 +104,7 @@ query_backend_destroy (GtkObject *object)
 	g_free (qb->priv->uri);
 	qb->priv->uri = NULL;
 
+	g_hash_table_foreach (qb->priv->components, (GHFunc) free_hash_comp_cb, NULL);
 	g_hash_table_destroy (qb->priv->components);
 	qb->priv->components = NULL;
 
@@ -154,20 +166,39 @@ static void
 object_updated_cb (CalBackend *backend, const char *uid, gpointer user_data)
 {
 	gpointer orig_key, orig_value;
-	char *tmp_uid;
+	const char *tmp_uid;
 	CalComponent *comp;
+	icalcomponent *icalcomp;
+	char *comp_str;
 	QueryBackend *qb = (QueryBackend *) user_data;
 
 	g_return_if_fail (IS_QUERY_BACKEND (qb));
 
 	if (g_hash_table_lookup_extended (qb->priv->components, uid, &orig_key, &orig_value)) {
 		g_hash_table_remove (qb->priv->components, uid);
+		g_free (orig_key);
+		gtk_object_unref (GTK_OBJECT (orig_value));
 	}
 
-	comp = cal_backend_get_object_component (qb->priv->backend, uid);
-	if (IS_CAL_COMPONENT (comp)) {
+	comp_str = cal_backend_get_object (qb->priv->backend, uid);
+	if (!comp_str)
+		return;
+
+	icalcomp = icalparser_parse_string (comp_str);
+	g_free (comp_str);
+	if (icalcomp) {
+		comp = cal_component_new ();
+		if (!cal_component_set_icalcomponent (comp, icalcomp)) {
+			icalcomponent_free (icalcomp);
+			gtk_object_unref (GTK_OBJECT (comp));
+			return;
+		}
+
 		cal_component_get_uid (comp, &tmp_uid);
-		g_hash_table_insert (qb->priv->components, tmp_uid, comp);
+		if (!uid || !*uid) {
+			gtk_object_unref (GTK_OBJECT (comp));
+		} else
+			g_hash_table_insert (qb->priv->components, g_strdup (tmp_uid), comp);
 	}
 }
 
@@ -181,6 +212,8 @@ object_removed_cb (CalBackend *backend, const char *uid, gpointer user_data)
 
 	if (g_hash_table_lookup_extended (qb->priv->components, uid, &orig_key, &orig_value)) {
 		g_hash_table_remove (qb->priv->components, uid);
+		g_free (orig_key);
+		gtk_object_unref (GTK_OBJECT (orig_value));
 	}
 }
 
@@ -199,20 +232,12 @@ query_destroyed_cb (GtkObject *object, gpointer user_data)
 static void
 foreach_uid_cb (gpointer data, gpointer user_data)
 {
-	CalComponent *comp;
-	char *uid;
 	QueryBackend *qb = (QueryBackend *) user_data;
 
 	g_return_if_fail (data != NULL);
 	g_return_if_fail (IS_QUERY_BACKEND (qb));
 
-	comp = cal_backend_get_object_component (qb->priv->backend, (const char *) data);
-	if (IS_CAL_COMPONENT (comp)) {
-		cal_component_get_uid (comp, &uid);
-		g_hash_table_insert (qb->priv->components, uid, comp);
-	}
-	else
-		g_warning (_("Could not get component with UID = %s"), (const char *) data);
+	object_updated_cb (qb->priv->backend, (const char *) data, qb);
 }
 
 /**
@@ -258,6 +283,8 @@ query_backend_new (Query *query, CalBackend *backend)
 		gtk_signal_connect (GTK_OBJECT (backend), "obj_removed",
 				    GTK_SIGNAL_FUNC (object_removed_cb), qb);
 
+		if (!loaded_backends)
+			loaded_backends = g_hash_table_new (g_str_hash, g_str_equal);
 		g_hash_table_insert (loaded_backends, qb->priv->uri, qb);
 	}
 
@@ -267,3 +294,74 @@ query_backend_new (Query *query, CalBackend *backend)
 
 	return qb;
 }
+
+typedef struct {
+	GList *uidlist;
+	CalObjType type;
+} GetUidsData;
+
+static void
+uid_hash_cb (gpointer key, gpointer value, gpointer user_data)
+{
+	CalComponentVType vtype;
+	char *uid = (char *) key;
+	CalComponent *comp = (CalComponent *) value;
+	GetUidsData *uids_data = (GetUidsData *) user_data;
+
+	g_return_if_fail (uid != NULL);
+	g_return_if_fail (IS_CAL_COMPONENT (comp));
+	g_return_if_fail (uids_data != NULL);
+
+	vtype = cal_component_get_vtype (comp);
+	if (vtype == CAL_COMPONENT_EVENT && uids_data->type == CALOBJ_TYPE_EVENT)
+		uids_data->uidlist = g_list_append (uids_data->uidlist, g_strdup (uid));
+	else if (vtype == CAL_COMPONENT_TODO && uids_data->type == CALOBJ_TYPE_TODO)
+		uids_data->uidlist = g_list_append (uids_data->uidlist, g_strdup (uid));
+	else if (vtype == CAL_COMPONENT_JOURNAL && uids_data->type == CALOBJ_TYPE_JOURNAL)
+		uids_data->uidlist = g_list_append (uids_data->uidlist, g_strdup (uid));
+	else if (uids_data->type == CALOBJ_TYPE_ANY)
+		uids_data->uidlist = g_list_append (uids_data->uidlist, g_strdup (uid));
+}
+
+/**
+ * query_backend_get_uids
+ * @qb: A #QueryBackend type.
+ * @type: Type of objects to get the UIDs for.
+ *
+ * Get a list of all UIDs for objects of the given type out from
+ * the specified #QueryBackend object.
+ *
+ * Returns: a GList of UIDs, which should be freed, when no longer needed,
+ * via a call to cal_obj_uid_list_free.
+ */
+GList *
+query_backend_get_uids (QueryBackend *qb, CalObjType type)
+{
+	GetUidsData uids_data;
+
+	g_return_val_if_fail (IS_QUERY_BACKEND (qb), NULL);
+
+	uids_data.uidlist = NULL;
+	uids_data.type = type;
+	g_hash_table_foreach (qb->priv->components, (GHFunc) uid_hash_cb, &uids_data);
+
+	return uids_data.uidlist;
+}
+
+/**
+ * query_backend_get_object_component
+ * @qb: A #QueryBackend object.
+ * @uid: UID of the object to retrieve.
+ *
+ * Get a #CalComponent from the given #QueryBackend.
+ *
+ * Returns: the component if found, NULL otherwise.
+ */
+CalComponent *
+query_backend_get_object_component (QueryBackend *qb, const char *uid)
+{
+	g_return_val_if_fail (IS_QUERY_BACKEND (qb), NULL);
+	g_return_val_if_fail (uid != NULL, NULL);
+
+	return g_hash_table_lookup (qb->priv->components, uid);
+}
diff --git a/calendar/pcs/query-backend.h b/calendar/pcs/query-backend.h
index 835c42a8fd..9a581757a7 100644
--- a/calendar/pcs/query-backend.h
+++ b/calendar/pcs/query-backend.h
@@ -47,6 +47,8 @@ typedef struct {
 
 GtkType       query_backend_get_type (void);
 QueryBackend *query_backend_new (Query *query, CalBackend *backend);
+GList        *query_backend_get_uids (QueryBackend *qb, CalObjType type);
+CalComponent *query_backend_get_object_component (QueryBackend *qb, const char *uid);
 
 END_GNOME_DECLS
 
diff --git a/calendar/pcs/query.c b/calendar/pcs/query.c
index 8e952a5727..8ecd3445cd 100644
--- a/calendar/pcs/query.c
+++ b/calendar/pcs/query.c
@@ -35,6 +35,7 @@
 #include <cal-util/timeutil.h>
 #include "cal-backend.h"
 #include "query.h"
+#include "query-backend.h"
 
 
 
@@ -52,6 +53,9 @@ struct _QueryPrivate {
 	/* The backend we are monitoring */
 	CalBackend *backend;
 
+	/* The cache backend */
+	QueryBackend *qb;
+
 	/* The default timezone for the calendar. */
 	icaltimezone *default_zone;
 
@@ -122,6 +126,7 @@ query_init (Query *query)
 	query->priv = priv;
 
 	priv->backend = NULL;
+	priv->qb = NULL;
 	priv->default_zone = NULL;
 	priv->ql = CORBA_OBJECT_NIL;
 	priv->sexp = NULL;
@@ -175,6 +180,8 @@ query_destroy (GtkObject *object)
 		priv->backend = NULL;
 	}
 
+	priv->qb = NULL;
+
 	if (priv->ql != CORBA_OBJECT_NIL) {
 		CORBA_Environment ev;
 
@@ -1120,7 +1127,7 @@ match_component (Query *query, const char *uid,
 	g_assert (priv->state == QUERY_IN_PROGRESS || priv->state == QUERY_DONE);
 	g_assert (priv->esexp != NULL);
 
-	comp = cal_backend_get_object_component (priv->backend, uid);
+	comp = query_backend_get_object_component (priv->qb, uid);
 	if (!comp)
 		return;
 
@@ -1302,7 +1309,7 @@ start_query (Query *query)
 	/* Populate the query with UIDs so that we can process them asynchronously */
 
 	priv->state = QUERY_IN_PROGRESS;
-	priv->pending_uids = cal_backend_get_uids (priv->backend, CALOBJ_TYPE_ANY);
+	priv->pending_uids = query_backend_get_uids (priv->qb, CALOBJ_TYPE_ANY);
 	priv->pending_total = g_list_length (priv->pending_uids);
 	priv->n_pending = priv->pending_total;
 
@@ -1406,6 +1413,7 @@ query_construct (Query *query,
 	priv->backend = backend;
 	gtk_object_ref (GTK_OBJECT (priv->backend));
 
+	priv->qb = query_backend_new (query, backend);
 	priv->default_zone = cal_backend_get_default_timezone (backend);
 
 	priv->sexp = g_strdup (sexp);