lib/response_callback.cpp

   1 /**
   2  * @file response_callback.cpp
   3  *
   4  * @brief Settings plugin response_callback implementation.
   5  *
   6  * @author Ossama Othman @<ossama.othman@@intel.com@>
   7  *
   8  * @copyright @par
   9  * Copyright 2013 Intel Corporation All Rights Reserved.
  10  * @par
  11  * This library is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU Lesser General Public
  13  * License as published by the Free Software Foundation;
  14  * version 2.1 of the License.
  15  * @par
  16  * This library is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * Lesser General Public License for more details.
  20  * @par
  21  * You should have received a copy of the GNU Lesser General Public
  22  * License along with this library; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor,
  24  * Boston, MA  02110-1301  USA
  25  */
  26
  27 #include <settingsd/response_callback.hpp>
  28 #include <settingsd/json_glib_traits.hpp>
  29 #include <settingsd/unique_ptr.hpp>
  30
  31
  32 ivi::settings::response_callback::response_callback(
  33   libwebsocket * wsi,
  34   std::string type,
  35   std::string transaction_id)
  36   : writer_(wsi)
  37   , type_(type)
  38   , transaction_id_(transaction_id)
  39 {
  40 }
  41
  42 ivi::settings::response_callback::response_callback(
  43   response_callback const & other)
  44   : writer_(other.writer_)
  45   , type_(other.type_)
  46   , transaction_id_(other.transaction_id_)
  47 {
  48 }
  49
  50
  51 bool
  52 ivi::settings::response_callback::send_response(
  53   std::function<void(JsonBuilder *)> response_builder) const
  54 {
  55   unique_ptr<JsonBuilder> const builder = begin_response("succeeded");
  56
  57   // Append successful Settings app results to the JSON formatted
  58   // response.
  59   response_builder(builder.get());
  60
  61   end_response(builder);
  62
  63   bool const success = writer_.send_payload("response", builder);
  64
  65   if (!success)
  66     g_critical("Unable to send response for:\n"
  67                "    type:          %s\n"
  68                "    transactionid: %s\n",
  69                type_.c_str(),
  70                transaction_id_.c_str());
  71
  72   return success;
  73 }
  74
  75 bool
  76 ivi::settings::response_callback::send_error(
  77   std::string error_message) const
  78 {
  79   unique_ptr<JsonBuilder> builder = begin_response("failed");
  80
  81   json_builder_set_member_name(builder.get(), "reason");;
  82   json_builder_add_string_value(builder.get(), error_message.c_str());
  83
  84   end_response(builder);
  85
  86   bool const success = writer_.send_payload("error", builder);
  87
  88   if (!success)
  89     g_critical("Unable to send error for:\n"
  90                "    type:          %s\n"
  91                "    transactionid: %s\n",
  92                type_.c_str(),
  93                transaction_id_.c_str());
  94
  95   return success;
  96 }
  97
  98 void
  99 ivi::settings::response_callback::add_string_value(
 100   JsonBuilder * builder,
 101   std::string const & name,
 102   std::string const & value) const
 103 {
 104   json_builder_set_member_name(builder, name.c_str());
 105   if (value.empty())
 106     json_builder_add_null_value(builder);
 107   else
 108     json_builder_add_string_value(builder, value.c_str());
 109 }
 110
 111 ivi::settings::unique_ptr<JsonBuilder>
 112 ivi::settings::response_callback::begin_response(
 113   char const * result) const
 114 {
 115   // Construct JSON response.
 116   unique_ptr<JsonBuilder> safe_builder(json_builder_new());
 117   JsonBuilder * const builder = safe_builder.get();
 118
 119   json_builder_begin_object(builder);
 120
 121   add_string_value(builder, "type",          type_);
 122   add_string_value(builder, "transactionid", transaction_id_);
 123
 124   json_builder_set_member_name(builder, "result");
 125   json_builder_add_string_value(builder, result);
 126
 127   return safe_builder;
 128 }
 129
 130 void
 131 ivi::settings::response_callback::end_response(
 132   ivi::settings::unique_ptr<JsonBuilder> const & builder) const
 133 {
 134   json_builder_end_object(builder.get());
 135 }
 136
 137
 138 // Local Variables:
 139 // mode:c++
 140 // c-basic-offset:2
 141 // indent-tabs-mode: nil
 142 // End: