100 lines
2.7 KiB
C
100 lines
2.7 KiB
C
#include "../graph.h"
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#include "../module_registry.h"
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typedef struct {
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GraphNode as_GraphNode;
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size_t length;
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EventPredicateHandle * predicates;
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} RouterGraphNode;
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static bool
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handle_event(EventPositionBase * self, EventNode * event)
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{
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RouterGraphNode *node = DOWNCAST(RouterGraphNode, GraphNode, DOWNCAST(GraphNode, EventPositionBase, self));
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for (ssize_t i = node->length - 1; i >= 0; --i) {
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if ((size_t) i >= node->as_GraphNode.outputs.length) {
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continue;
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}
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if (event_predicate_apply(node->predicates[i], event) == EVPREDRES_ACCEPTED) {
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if (event_replicate(event, 1)) {
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event->next->position = &node->as_GraphNode.outputs.elements[i]->as_EventPositionBase;
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}
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}
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}
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event_destroy(event);
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return true;
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}
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static GraphNode *
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create(GraphNodeSpecification * spec, GraphNodeConfig * config, InitializationEnvironment * env)
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{
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(void) config;
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(void) env;
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RouterGraphNode * node = T_ALLOC(1, RouterGraphNode);
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if (!node) {
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return NULL;
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}
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config_setting_t *predicates_setting = config_setting_get_member(config->options, "predicates");
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if (!predicates_setting) {
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free(node);
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return NULL;
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}
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EventPredicateHandle *predicates = NULL;
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size_t length = config_setting_length(predicates_setting);
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if (length > 0) {
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predicates = T_ALLOC(length, EventPredicateHandle);
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if (!predicates) {
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free(node);
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return NULL;
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}
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for (size_t i = 0; i < length; ++i) {
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predicates[i] = env_resolve_event_predicate(env, config_setting_get_elem(predicates_setting, i));
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}
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}
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*node = (RouterGraphNode) {
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.as_GraphNode = {
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.as_EventPositionBase = {
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.handle_event = &handle_event,
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.waiting_new_event = false,
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},
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.specification = spec,
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.inputs = EMPTY_GRAPH_CHANNEL_LIST,
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.outputs = EMPTY_GRAPH_CHANNEL_LIST,
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},
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.length = length,
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.predicates = predicates,
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};
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return &node->as_GraphNode;
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}
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static void destroy
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(GraphNodeSpecification * self, GraphNode * target)
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{
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(void) self;
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RouterGraphNode * node = DOWNCAST(RouterGraphNode, GraphNode, target);
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if (node->predicates) {
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free(node->predicates);
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node->predicates = NULL;
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node->length = 0;
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}
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free(target);
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}
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GraphNodeSpecification nodespec_router = (GraphNodeSpecification) {
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.create = &create,
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.destroy = &destroy,
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.register_io = NULL,
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.name = "router",
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.documentation = "Conditionally copies the received events\nAccepts events on any connector\nSends events on all connectors with configured predicates"
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"\nOption 'predicates' (required): collection of predicates in the order of output connectors from zero, a received event is copied to the given connector iff it satisfies the predicate"
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,
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};
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MODULE_CONSTRUCTOR(init)
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{
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register_graph_node_specification(&nodespec_router);
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}
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