Set ID and direction of created signals

gql_signal.go

@@ -2,6 +2,7 @@ package graphvent
 
 import (
   graphql "github.com/graphql-go/graphql"
+  "github.com/google/uuid"
   "reflect"
   "fmt"
   "time"
@@ -37,7 +38,7 @@ var type_gql_map = map[reflect.Type]GQLTypeInfo{
       }
 
       if str == "" {
-        return reflect.New(reflect.TypeOf(NodeID{})), nil
+        return reflect.New(reflect.TypeOf(&NodeID{})).Elem(), nil
       }
 
       id_parsed, err := ParseID(str)
@@ -73,8 +74,15 @@ type StructFieldInfo struct {
   Index []int
 }
 
-func SignalFromArgs(signal_type reflect.Type, fields []StructFieldInfo, args map[string]interface{}) (Signal, error) {
+func SignalFromArgs(signal_type reflect.Type, fields []StructFieldInfo, args map[string]interface{}, id_index, direction_index []int) (Signal, error) {
   signal_value := reflect.New(signal_type)
+
+  id_field := signal_value.Elem().FieldByIndex(id_index)
+  id_field.Set(reflect.ValueOf(uuid.New()))
+
+  direction_field := signal_value.Elem().FieldByIndex(direction_index)
+  direction_field.Set(reflect.ValueOf(Direct))
+
   for _, field := range(fields) {
     arg, arg_exists := args[field.Name]
     if arg_exists == false {
@@ -96,16 +104,17 @@ func SignalFromArgs(signal_type reflect.Type, fields []StructFieldInfo, args map
 func (ext *GQLExtContext) AddSignalMutation(name string, send_id_key string, signal_type reflect.Type) error {
   args := graphql.FieldConfigArgument{}
   arg_info := []StructFieldInfo{}
+  var id_index []int = nil
+  var direction_index []int = nil
 
   for _, field := range(reflect.VisibleFields(signal_type)) {
     gv_tag, tagged_gv := field.Tag.Lookup("gv")
     if tagged_gv {
       if gv_tag == "id" {
-        continue
-      }
-      if gv_tag == "direction" {
-        continue
-      }
+        id_index = field.Index
+      } else if gv_tag == "direction" {
+        direction_index = field.Index
+      } else {
         _, exists := args[gv_tag]
         if exists == true {
           return fmt.Errorf("Signal has repeated tag %s", gv_tag)
@@ -132,6 +141,7 @@ func (ext *GQLExtContext) AddSignalMutation(name string, send_id_key string, sig
         })
       }
     }
+  }
 
   _, send_exists := args[send_id_key]
   if send_exists == false {
@@ -151,7 +161,7 @@ func (ext *GQLExtContext) AddSignalMutation(name string, send_id_key string, sig
       return nil, err
     }
 
-    signal, err := SignalFromArgs(signal_type, arg_info, p.Args)
+    signal, err := SignalFromArgs(signal_type, arg_info, p.Args, id_index, direction_index)
     if err != nil {
       return nil, err
     }