4 files changed, 48 insertions, 3 deletions

diff --git a/comet.conf b/comet.conf
index b3cef7d..fbf0bc8 100644
--- a/comet.conf
+++ b/comet.conf
@@ -93,6 +93,8 @@ sus = 1
     x-padding = 5
     y-padding = 5
 
+    trigger = tried
+
 [block.slide]
     type = slider
     bar-value = 88
@@ -136,3 +138,8 @@ sus = 1
     ;target = block.mus
     ;set-blocks = bogus
 
+    target = block.next
+    trigger = ciao
+
+[action.tried]
+    run-sync = echo ciao
diff --git a/src/action.c b/src/action.c
index 6b48c15..df6ad3a 100644
--- a/src/action.c
+++ b/src/action.c
@@ -51,9 +51,11 @@ bool action_perform(action_t *action, block_t *block, config_t *config)
             case ACTION_SET_PAIR: {
                 assert(target != NULL);
 
-                if (!warned && target->scheme->change_fn == NULL) {
-                    log_warn("Block '%s' does not support 'set' actions", target->label);
-                    warned = true;
+                if (target->scheme->change_fn == NULL) {
+                    if (!warned) {
+                        log_warn("Block '%s' does not support 'set' actions", target->label);
+                        warned = true;
+                    }
                     continue;
                 }
 
@@ -96,6 +98,39 @@ bool action_perform(action_t *action, block_t *block, config_t *config)
                 break;
             }
 
+            case ACTION_TRIGGER: {
+                event_t event;
+                event_init_trigger(&event, action->label, value);
+
+                action_t *action = target->actions[EVENT_TRIGGER];
+                block_event_t event_fn = target->type == BLOCK_SPEC
+                                       ? ((block_spec_t *)target)->event_fn
+                                       : NULL;
+
+                log_value_debug("Block received a trigger",
+                                "s:target", target->label,
+                                "s:origin", event.trigger.origin,
+                                "s:payload", event.trigger.payload,
+                                "b:action", action != NULL,
+                                "b:callback", event_fn != NULL);
+
+                if (event_fn != NULL) {
+                    // FIXME
+                    layout_t tmp = {
+                        .block = target,
+                    };
+
+                    event_fn(&tmp, config, event);
+                    log_trace("Completed event callback");
+                } else if (action != NULL) {
+                    action_perform(action, target, config);
+                } else {
+                    log_warn("Block '%s' was triggered but had nothing to respond", target->label);
+                }
+
+                break;
+            }
+
             default:
                 unreachable();
         }
diff --git a/src/action.h b/src/action.h
index eb144a5..946b629 100644
--- a/src/action.h
+++ b/src/action.h
@@ -10,6 +10,7 @@ typedef enum {
     ACTION_SET_PAIR,
     ACTION_RUN_SYNC,
     ACTION_RUN_ASYNC,
+    ACTION_TRIGGER,
 } action_type_t;
 
 typedef struct {
diff --git a/src/config.c b/src/config.c
index 6b8fc58..86d5ac2 100644
--- a/src/config.c
+++ b/src/config.c
@@ -446,6 +446,8 @@ static config_status_t config_read_action(action_t *action, const char *key, con
         type = ACTION_RUN_SYNC;
     else if (!strcmp(key, "run-async"))
         type = ACTION_RUN_ASYNC;
+    else if (!strcmp(key, "trigger"))
+        type = ACTION_TRIGGER;
     else
         return CONFIG_UNKNOWN;