get verb: add option id

can be called with json value:
    - a string matching can id
    - an array matching can ids

Change-Id: Ia38728e065348e265613643fc934eb985564b722
Signed-off-by: Clément Bénier <clement.benier@iot.bzh>
Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>

diff --git a/low-can-binding/binding/low-can-cb.cpp b/low-can-binding/binding/low-can-cb.cpp
index 42e0265..5e4c16a 100644 (file)
--- a/low-can-binding/binding/low-can-cb.cpp
+++ b/low-can-binding/binding/low-can-cb.cpp
@@ -746,6 +746,36 @@ static struct json_object *get_signals_value(const std::string& name)
 
        return ans;
 }
+
+static struct json_object *get_id_value(const uint32_t& id)
+{
+       std::shared_ptr<message_definition_t> message_definition = application_t::instance().get_message_definition(id);
+       struct utils::signals_found sf;
+       struct json_object *ans = nullptr;
+
+       if(message_definition)
+               sf.signals = list_ptr_signal_t(message_definition->get_signals().begin(), message_definition->get_signals().end());
+
+       if(sf.signals.empty())
+       {
+               AFB_WARNING("no signal(s) found for %d.", id);
+               return NULL;
+       }
+
+       ans = json_object_new_object();
+       struct json_object *jsignals = json_object_new_array();
+       json_object_object_add(ans, "signals", jsignals);
+       for(const auto& sig: sf.signals)
+       {
+               struct json_object *jobj = json_object_new_object();
+               json_object_object_add(jobj, "name", json_object_new_string(sig->get_name().c_str()));
+               json_object_object_add(jobj, "value", json_object_new_double(sig->get_last_value()));
+               json_object_array_add(jsignals, jobj);
+       }
+
+       return ans;
+}
+
 void get(afb_req_t request)
 {
        int rc = 0;
@@ -763,6 +793,37 @@ void get(afb_req_t request)
                if (!ans)
                        rc = -1;
        }
+       else if (args != nullptr &&
+               (json_object_object_get_ex(args, "id", &json_name)))
+       {
+               if (json_object_get_type(json_name) == json_type_string) // id is set before and check if it's an array
+               {
+                       ans = get_id_value(json_object_get_int(json_name));
+               }
+               else if(json_object_get_type(json_name) == json_type_array)
+               {
+                       ans = json_object_new_array();
+                       for (int i = 0 ; i < json_object_array_length(json_name); i++)
+                       {
+                               json_object *sub_ans = nullptr;
+                               json_object *x = json_object_array_get_idx(json_name, i);
+                               sub_ans = get_id_value(json_object_get_int(x));
+                               if(!sub_ans)
+                                       rc = -1;
+                               else {
+                                       struct json_object *jobj = json_object_new_object();
+                                       struct json_object *jid = json_object_new_string(json_object_get_string(x));
+                                       json_object_object_add(jobj, "id", jid);
+                                       json_object_object_add(jobj, "data", sub_ans);
+                                       json_object_array_add(ans, jobj);
+                               }
+                       }
+               }
+               else
+                       rc = -1;
+               if (!ans)
+                       rc = -1;
+       }
        else
        {
                AFB_ERROR("Request argument malformed. Please use the following syntax:");