[p] Platform handler

dfssp/server/server.go

@@ -43,8 +43,7 @@ func (s *platformServer) Auth(ctx context.Context, in *api.AuthRequest) (*api.Re
 //
 // Handle incoming UnregisterRequest messages
 func (s *platformServer) Unregister(ctx context.Context, in *api.Empty) (*api.ErrorCode, error) {
-	// TODO
-	return nil, nil
+	return user.Unregister(s.DB, net.GetClientHash(&ctx)), nil
 }
 
 // PostContract handler

dfssp/user/delete.go

+package user
+
+import (
+	api "dfss/dfssp/api"
+	"dfss/mgdb"
+	"gopkg.in/mgo.v2/bson"
+)
+
+// Unregister delete a user based on the provided certificate hash
+func Unregister(manager *mgdb.MongoManager, userCertificateHash []byte) *api.ErrorCode {
+	count, err := manager.Get("users").DeleteAll(bson.M{
+		"certHash": bson.M{"$eq": userCertificateHash},
+	})
+	if err != nil || count == 0 {
+		return &api.ErrorCode{Code: api.ErrorCode_INVARG, Message: "No user matching provided certificate"}
+	}
+
+	return &api.ErrorCode{Code: api.ErrorCode_SUCCESS}
+}