first draft to new subscribre unsubscibre method

Change-Id: I2a3fe7ac1d77cc893e9cc63c54895d521ab2bf01
Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>

diff --git a/src/low-can-binding-new.cpp b/src/low-can-binding-new.cpp
new file mode 100644 (file)
index 0000000..3686c6b
--- /dev/null
+++ b/src/low-can-binding-new.cpp
@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2015, 2016 "IoT.bzh"
+ * Author "Romain Forlot" <romain.forlot@iot.bzh>
+ * Author "Loic Collignon" <loic.collignon@iot.bzh>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "low-can-binding.hpp"
+
+/********************************************************************************
+*
+*              Subscription and unsubscription
+*
+*********************************************************************************/
+
+std::vector<std::string> get_name(struct afb_req request)
+{
+       int i, n;
+       std::vector<std::string> ret;
+       struct json_object *args, *a, *x;
+
+       args = afb_req_json(request);
+       if (args == NULL || !json_object_object_get_ex(args, "event", &a))
+               ret.clear();
+       else if (json_object_get_type(a) != json_type_array)
+               ret.push_back(json_object_get_string(a));
+       else
+       {
+               n = json_object_array_length(a);
+               for (i = 0 ; i < n ; i++) {
+                       x = json_object_array_get_idx(a, i);
+                       ret.push_back(json_object_get_string(x));
+               }
+       }
+
+       return ret;
+}
+
+static const struct afb_verb_desc_v1 verbs[]=
+{
+       { .name= "subscribe",   .session= AFB_SESSION_NONE, .callback= subscribe,       .info= "subscribe to notification of CAN bus messages." },
+       { .name= "unsubscribe", .session= AFB_SESSION_NONE, .callback= unsubscribe,     .info= "unsubscribe a previous subscription." }
+};
+
+static const struct afb_binding binding_desc {
+       AFB_BINDING_VERSION_1,
+       {
+               "CAN bus service",
+               "can",
+               verbs
+       }
+};
+
+extern "C"
+{
+       static void subscribe(struct afb_req request)
+       {
+               int ret;
+               std::vector<std::string> names;
+               
+               names = get_name(request);
+               if(names.empty())
+                       ret = subscribe_signals(request, "*");
+               else
+                       ret = subscribe_signals(request, names);
+       }
+
+       static void unsubscribe(struct afb_req request)
+       {
+               subscribe_unsubscribe(request, false);
+       }
+
+       const struct afb_binding *afbBindingV1Register (const struct afb_binding_interface *itf)
+       {
+               interface = itf;
+
+               return &binding_desc;
+       }
+
+       /**
+       * @brief Initialize the binding.
+       * 
+       * @param[in] service Structure which represent the Application Framework Binder.
+       * 
+       * @return Exit code, zero if success.
+       */
+       int afbBindingV1ServiceInit(struct afb_service service)
+       {
+               int fd_conf;
+               fd_conf = afb_daemon_rootdir_open_locale(interface->daemon, "can_bus.json", O_RDONLY, NULL);
+
+               /* Open CAN socket */
+               can_bus_t can_bus_handler(interface, fd_conf);
+               if(can_bus_handler.init_can_dev() == 0)
+               {
+                       can_bus_handler.start_threads();
+                       return 0;
+               }
+
+               return 1;
+       }
+};
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