static guint
_mex_grilo_feed_search (MexGriloFeed *feed,
const char *search_text,
int offset,
int limit,
GrlSourceResultCb callback)
{
MexGriloFeedPrivate *priv = feed->priv;
GrlOperationOptions *options;
int op_id;
options = grl_operation_options_new (NULL);
grl_operation_options_set_flags (options, BROWSE_FLAGS);
grl_operation_options_set_skip (options, priv->op->offset);
grl_operation_options_set_count (options, priv->op->limit);
op_id = grl_source_search (priv->source, priv->op->text,
priv->query_keys,
options,
callback, feed);
g_object_unref (options);
return op_id;
}
static GrlOperationOptions *
make_operation_options (RBGriloSource *source, GrlSupportedOps op, int position)
{
GrlOperationOptions *options;
GrlCaps *caps;
caps = grl_source_get_caps (source->priv->grilo_source, op);
options = grl_operation_options_new (caps);
grl_operation_options_set_skip (options, position);
grl_operation_options_set_count (options,
CONTAINER_FETCH_SIZE);
grl_operation_options_set_type_filter (options, GRL_TYPE_FILTER_AUDIO);
grl_operation_options_set_flags (options, GRL_RESOLVE_NORMAL);
return options;
}
static struct MultipleSearchData *
start_multiple_search_operation (guint search_id,
const GList *sources,
const gchar *text,
const GList *keys,
const GList *skip_counts,
gint count,
GrlOperationOptions *options,
GrlSourceResultCb user_callback,
gpointer user_data)
{
GRL_DEBUG ("start_multiple_search_operation");
struct MultipleSearchData *msd;
GList *iter_sources, *iter_skips;
guint n;
gint first_count, individual_count;
/* Prepare data required to execute the operation */
msd = g_new0 (struct MultipleSearchData, 1);
msd->table = g_hash_table_new_full (g_direct_hash, g_direct_equal,
NULL, g_free);
msd->remaining =
(count == GRL_COUNT_INFINITY) ? GRL_COUNT_INFINITY : (count - 1);
msd->search_id = search_id;
msd->text = g_strdup (text);
msd->keys = g_list_copy ((GList *) keys);
msd->options = g_object_ref (options);
msd->user_callback = user_callback;
msd->user_data = user_data;
/* Compute the # of items to request by each source */
n = g_list_length ((GList *) sources);
if (count == GRL_COUNT_INFINITY) {
individual_count = GRL_COUNT_INFINITY;
first_count = GRL_COUNT_INFINITY;
} else {
individual_count = count / n;
first_count = individual_count + count % n;
}
/* Issue search operations on each source */
iter_sources = (GList *) sources;
iter_skips = (GList *) skip_counts;
n = 0;
while (iter_sources) {
GrlSource *source;
guint c, id;
struct ResultCount *rc;
guint skip;
source = GRL_SOURCE (iter_sources->data);
/* c is the count to use for this source */
c = (n == 0) ? first_count : individual_count;
n++;
/* Only interested in sources with c != 0 */
if (c != 0) {
GrlOperationOptions *source_options = NULL;
GrlCaps *source_caps;
/* We use ResultCount to keep track of results emitted by this source */
rc = g_new0 (struct ResultCount, 1);
rc->count = c;
g_hash_table_insert (msd->table, source, rc);
/* Check if we have to apply a "skip" parameter to this source
(useful when we are chaining queries to complete the result count) */
if (iter_skips) {
skip = GPOINTER_TO_INT (iter_skips->data);
} else {
skip = 0;
}
source_caps = grl_source_get_caps (source, GRL_OP_SEARCH);
grl_operation_options_obey_caps (options, source_caps, &source_options, NULL);
grl_operation_options_set_skip (source_options, skip);
grl_operation_options_set_count (source_options, rc->count);
/* Execute the search on this source */
id = grl_source_search (source,
msd->text,
msd->keys,
source_options,
multiple_search_cb,
msd);
GRL_DEBUG ("Operation %s:%u: Searching %u items from offset %u",
grl_source_get_name (GRL_SOURCE (source)),
id, rc->count, skip);
g_object_unref (source_options);
/* Keep track of this operation and this source */
msd->search_ids = g_list_prepend (msd->search_ids, GINT_TO_POINTER (id));
msd->sources = g_list_prepend (msd->sources, source);
msd->sources_count++;
}
/* Move to the next source */
iter_sources = g_list_next (iter_sources);
iter_skips = g_list_next (iter_skips);
}
static GList *
search_objects_cb (MS2Server *server,
const gchar *id,
const gchar *query,
guint offset,
guint max_count,
const gchar **properties,
gpointer data,
GError **error)
{
GList *objects;
GriloMs2Data *grdata;
gint count;
/* Browse is only allowed in root container */
if (g_strcmp0 (id, MS2_ROOT) != 0) {
if (error) {
/* FIXME: a better error should be reported */
*error = g_error_new (0, 0, "search is only allowed in root container");
}
return NULL;
}
grdata = g_slice_new0 (GriloMs2Data);
grdata->server = g_object_ref (server);
grdata->source = (GrlSource *) data;
grdata->options = grl_operation_options_new (NULL);
grdata->keys = get_grilo_keys (properties, &grdata->other_keys);
grdata->parent_id = g_strdup (id);
grdata->list_type = LIST_ALL;
grl_operation_options_set_resolution_flags (grdata->options,
GRL_RESOLVE_FULL |
GRL_RESOLVE_IDLE_RELAY);
/* Adjust limits */
if (offset >= limit) {
browse_cb (grdata->source, 0, NULL, 0, grdata, NULL);
} else {
count = max_count == 0? (limit - offset): CLAMP (max_count,
1,
limit - offset);
grl_operation_options_set_count (grdata->options, count);
grl_operation_options_set_skip (grdata->options, offset);
grl_source_search (grdata->source,
query,
grdata->keys,
grdata->options,
browse_cb,
grdata);
}
wait_for_result (grdata);
if (grdata->error) {
if (error) {
*error = grdata->error;
}
g_list_foreach (grdata->children, (GFunc) g_hash_table_unref, NULL);
g_list_free (grdata->children);
objects = NULL;
} else {
objects = grdata->children;
}
g_list_free (grdata->keys);
g_list_free (grdata->other_keys);
g_free (grdata->parent_id);
g_object_unref (grdata->server);
g_object_unref (grdata->options);
g_slice_free (GriloMs2Data, grdata);
return objects;
}
static GList *
list_children_cb (MS2Server *server,
const gchar *id,
ListType list_type,
guint offset,
guint max_count,
const gchar **properties,
gpointer data,
GError **error)
{
GList *children;
GrlMedia *media;
GriloMs2Data *grdata;
gint count;
grdata = g_slice_new0 (GriloMs2Data);
grdata->server = g_object_ref (server);
grdata->source = (GrlSource *) data;
grdata->options = grl_operation_options_new (NULL);
grdata->keys = get_grilo_keys (properties, &grdata->other_keys);
grdata->parent_id = g_strdup (id);
grdata->offset = offset;
grdata->list_type = list_type;
grl_operation_options_set_resolution_flags (grdata->options,
GRL_RESOLVE_FULL |
GRL_RESOLVE_IDLE_RELAY);
media = unserialize_media (grdata->source, id);
/* Adjust limits */
if (offset >= limit) {
browse_cb (grdata->source, 0, NULL, 0, grdata, NULL);
} else {
/* TIP: as Grilo is not able to split containers and items, in this case we
will ask for all elements and then remove unneeded children in callback */
switch (list_type) {
case LIST_ALL:
count = max_count == 0? (limit - offset): CLAMP (max_count,
1,
limit - offset);
grl_operation_options_set_count (grdata->options, count);
grl_operation_options_set_skip (grdata->options, offset);
grdata->operation_id = grl_source_browse (grdata->source,
media,
grdata->keys,
grdata->options,
browse_cb,
grdata);
break;
case LIST_CONTAINERS:
case LIST_ITEMS:
count = max_count == 0? limit: max_count;
grl_operation_options_set_count (grdata->options, count);
grl_operation_options_set_skip (grdata->options, 0);
grdata->operation_id = grl_source_browse (grdata->source,
media,
grdata->keys,
grdata->options,
browse_cb,
grdata);
break;
default:
/* Protection. It should never be reached, unless ListType is extended */
browse_cb (grdata->source, 0, NULL, 0, grdata, NULL);
}
}
wait_for_result (grdata);
if (grdata->error) {
if (error) {
*error = grdata->error;
}
g_list_foreach (grdata->children, (GFunc) g_hash_table_unref, NULL);
g_list_free (grdata->children);
children = NULL;
} else {
children = grdata->children;
}
g_object_unref (media);
g_list_free (grdata->keys);
g_list_free (grdata->other_keys);
g_free (grdata->parent_id);
g_object_unref (grdata->server);
g_object_unref (grdata->options);
g_slice_free (GriloMs2Data, grdata);
return children;
}