allows to filter events before to receive it

[src/app-framework-binder.git] / src / session.c

diff --git a/src/session.c b/src/session.c
index d08ca75..87e9237 100644 (file)
--- a/src/session.c
+++ b/src/session.c
@@ -65,6 +65,7 @@ static struct {
   int timeout;
   int apicount;
   const char *initok;
+  struct afb_event_listener_list *listeners;
 } sessions;
 
 // Free context [XXXX Should be protected again memory abort XXXX]
@@ -83,11 +84,16 @@ static void ctxUuidFreeCB (struct AFB_clientCtx *client)
 // Create a new store in RAM, not that is too small it will be automatically extended
 void ctxStoreInit (int max_session_count, int timeout, const char *initok, int context_count)
 {
+
        // let's create as store as hashtable does not have any
        sessions.store = calloc (1 + (unsigned)max_session_count, sizeof(struct AFB_clientCtx));
        sessions.max = max_session_count;
        sessions.timeout = timeout;
        sessions.apicount = context_count;
+        if (!initok) {
+               ERROR("\"--token=\" parameter is mandatory");
+               exit(1);
+       }
        if (strlen(initok) >= sizeof(sessions.store[0]->token)) {
                ERROR("initial token '%s' too long (max length 36)", initok);
                exit(1);
@@ -165,7 +171,15 @@ added:
 // Check if context timeout or not
 static int ctxStoreTooOld (struct AFB_clientCtx *ctx, time_t now)
 {
-    return ctx->expiration <= now;
+    assert (ctx != NULL);
+    return ctx->expiration < now;
+}
+
+// Check if context is active or not
+static int ctxIsActive (struct AFB_clientCtx *ctx, time_t now)
+{
+    assert (ctx != NULL);
+    return ctx->uuid[0] != 0 && ctx->expiration >= now;
 }
 
 // Loop on every entry and remove old context sessions.hash
@@ -276,7 +290,7 @@ int ctxTokenCheck (struct AFB_clientCtx *clientCtx, const char *token)
        assert(token != NULL);
 
        // compare current token with previous one
-       if (ctxStoreTooOld (clientCtx, NOW))
+       if (!ctxIsActive (clientCtx, NOW))
                return 0;
 
        if (clientCtx->token[0] && strcmp (token, clientCtx->token) != 0)
@@ -300,11 +314,11 @@ void ctxTokenNew (struct AFB_clientCtx *clientCtx)
        clientCtx->expiration = NOW + sessions.timeout;
 }
 
-int ctxClientEventListenerAdd(struct AFB_clientCtx *clientCtx, struct afb_event_listener listener)
+static int add_listener(struct afb_event_listener_list **head, struct afb_event_listener listener)
 {
        struct afb_event_listener_list *iter, **prv;
 
-       prv = &clientCtx->listeners;
+       prv = head;
        for (;;) {
                iter = *prv;
                if (iter == NULL) {
@@ -326,11 +340,16 @@ int ctxClientEventListenerAdd(struct AFB_clientCtx *clientCtx, struct afb_event_
        }
 }
 
-void ctxClientEventListenerRemove(struct AFB_clientCtx *clientCtx, struct afb_event_listener listener)
+int ctxClientEventListenerAdd(struct AFB_clientCtx *clientCtx, struct afb_event_listener listener)
+{
+       return add_listener(clientCtx != NULL ? &clientCtx->listeners : &sessions.listeners, listener);
+}
+
+static void remove_listener(struct afb_event_listener_list **head, struct afb_event_listener listener)
 {
        struct afb_event_listener_list *iter, **prv;
 
-       prv = &clientCtx->listeners;
+       prv = head;
        for (;;) {
                iter = *prv;
                if (iter == NULL)
@@ -346,16 +365,23 @@ void ctxClientEventListenerRemove(struct AFB_clientCtx *clientCtx, struct afb_ev
        }
 }
 
-static int send(struct AFB_clientCtx *clientCtx, const char *event, struct json_object *object)
+void ctxClientEventListenerRemove(struct AFB_clientCtx *clientCtx, struct afb_event_listener listener)
+{
+       remove_listener(clientCtx != NULL ? &clientCtx->listeners : &sessions.listeners, listener);
+}
+
+static int send(struct afb_event_listener_list *head, const char *event, struct json_object *object)
 {
        struct afb_event_listener_list *iter;
        int result;
 
        result = 0;
-       iter = clientCtx->listeners;
+       iter = head;
        while (iter != NULL) {
-               iter->listener.itf->send(iter->listener.closure, event, json_object_get(object));
-               result++;
+               if (iter->listener.itf->expects == NULL || iter->listener.itf->expects(iter->listener.closure, event)) {
+                       iter->listener.itf->send(iter->listener.closure, event, json_object_get(object));
+                       result++;
+               }
                iter = iter->next;
        }
 
@@ -368,18 +394,18 @@ int ctxClientEventSend(struct AFB_clientCtx *clientCtx, const char *event, struc
        time_t now;
        int result;
 
-       if (clientCtx != NULL)
-               result = send(clientCtx, event, object);
-       else {
-               result = 0;
-               now = NOW;
+       now = NOW;
+       if (clientCtx != NULL) {
+               result = ctxIsActive(clientCtx, now) ? send(clientCtx->listeners, event, object) : 0;
+       } else {
+               result = send(sessions.listeners, event, object);
                for (idx=0; idx < sessions.max; idx++) {
-                       clientCtx = sessions.store[idx];
-                       if (clientCtx != NULL && !ctxStoreTooOld(clientCtx, now)) {
+                       clientCtx = ctxClientAddRef(sessions.store[idx]);
+                       if (clientCtx != NULL && ctxIsActive(clientCtx, now)) {
                                clientCtx = ctxClientAddRef(clientCtx);
-                               result += send(clientCtx, event, object);
-                               ctxClientUnref(clientCtx);
+                               result += send(clientCtx->listeners, event, object);
                        }
+                       ctxClientUnref(clientCtx);
                }
        }
        return result;