/**
* \brief This function handle node_unsubscribe command
*/
int vs_handle_node_unsubscribe(struct VS_CTX *vs_ctx,
struct VSession *vsession,
struct Generic_Cmd *node_unsubscribe)
{
struct VSNode *node;
struct VSNodeSubscriber *node_subscriber;
uint32 node_id = UINT32(node_unsubscribe->data[0]);
uint32 version = UINT32(node_unsubscribe->data[UINT32_SIZE]);
/*uint32 crc32 = UINT32(node_unsubscribe->data[UINT32_SIZE + UINT32_SIZE]);*/
/* Try to find node */
if((node = vs_node_find(vs_ctx, node_id)) == NULL) {
v_print_log(VRS_PRINT_DEBUG_MSG, "%s() node (id: %d) not found\n",
__FUNCTION__, node_id);
return 0;
}
/* TODO: when versing will be supported, then compute crc32, save data to
* the disk and send node_unsubscribe command to the client with version number
* and crc32 */
if(version != 0) {
v_print_log(VRS_PRINT_WARNING,
"Version: %d != 0, versing is not supported yet\n", version);
}
/* Node has to be created */
if(node->state == ENTITY_CREATED || node->state == ENTITY_CREATING) {
/* Is client subscribed to this node? */
node_subscriber = node->node_subs.first;
while(node_subscriber != NULL) {
if(node_subscriber->session->session_id == vsession->session_id) {
break;
}
node_subscriber = node_subscriber->next;
}
if(node_subscriber!= NULL) {
return vs_node_unsubscribe(node, node_subscriber, 0);
} else {
v_print_log(VRS_PRINT_DEBUG_MSG,
"%s() client not subscribed to this node (id: %d)\n",
__FUNCTION__, node_id);
return 0;
}
} else {
v_print_log(VRS_PRINT_DEBUG_MSG,
"%s() node (id: %d) is not in NODE_CREATED state: %d\n",
__FUNCTION__, node->id, node->state);
return 0;
}
return 0;
}
/**
* \brief This function do recursive unsubscribing from node
*/
static int vs_node_unsubscribe(struct VSNode *node,
struct VSNodeSubscriber *node_subscriber,
int level)
{
struct VSNode *child_node;
struct VSLink *link;
struct VBucket *tg_bucket, *layer_bucket;
struct VSTagGroup *tg;
struct VSLayer *layer;
struct VSNodeSubscriber *_node_subscriber, *_next_node_subscriber;
struct VSEntityFollower *node_follower;
struct VSEntityFollower *taggroup_follower;
struct VSEntityFollower *layer_follower;
/* Unsubscribe from all child nodes */
link = node->children_links.first;
while(link != NULL) {
child_node = link->child;
_node_subscriber = child_node->node_subs.first;
while(_node_subscriber != NULL) {
_next_node_subscriber = _node_subscriber->next;
if(_node_subscriber->session->session_id == node_subscriber->session->session_id) {
/* Unsubscribe from child node */
vs_node_unsubscribe(child_node, _node_subscriber, level+1);
break;
}
_node_subscriber = _next_node_subscriber;
}
link = link->next;
}
/* Unsubscribe client from all tag groups */
tg_bucket = node->tag_groups.lb.first;
while(tg_bucket != NULL) {
tg = (struct VSTagGroup*)tg_bucket->data;
/* Remove client from the list of TagGroup subscribers */
vs_taggroup_unsubscribe(tg, node_subscriber->session);
/* Remove client from the list of TagGroup followers */
taggroup_follower = tg->tg_folls.first;
while(taggroup_follower != NULL) {
if(taggroup_follower->node_sub->session->session_id == node_subscriber->session->session_id) {
v_list_free_item(&tg->tg_folls, taggroup_follower);
break;
}
taggroup_follower = taggroup_follower->next;
}
tg_bucket = tg_bucket->next;
}
/* Unsubscribe client from all layers */
layer_bucket = node->layers.lb.first;
while(layer_bucket != NULL) {
layer = (struct VSLayer*)layer_bucket->data;
/* Remove client from the list of Layer subscribers */
vs_layer_unsubscribe(layer, node_subscriber->session);
/* Remove client from the list of Layer followers */
layer_follower = layer->layer_folls.first;
while(layer_follower != NULL) {
if(layer_follower->node_sub->session->session_id == node_subscriber->session->session_id) {
v_list_free_item(&layer->layer_folls, layer_follower);
break;
}
layer_follower = layer_follower->next;
}
layer_bucket = layer_bucket->next;
}
if(level > 0) {
/* Remove this session from list of followers too */
node_follower = node->node_folls.first;
while(node_follower != NULL) {
if(node_follower->node_sub->session->session_id == node_subscriber->session->session_id) {
/* Remove client from list of clients, that knows about this node */
v_print_log(VRS_PRINT_DEBUG_MSG,
"Removing session: %d from the list of node: %d followers\n",
node_subscriber->session->session_id, node->id);
v_list_free_item(&node->node_folls, node_follower);
break;
}
node_follower = node_follower->next;
}
}
/* Finally remove this session from list of node subscribers */
v_list_free_item(&node->node_subs, node_subscriber);
return 1;
}