src/libpsensor_json/psensor_json.c

   1 /*
   2     Copyright (C) 2010-2011 wpitchoune@gmail.com
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  17     02110-1301 USA
  18 */
  19
  20 #include <string.h>
  21
  22 #include "psensor_json.h"
  23
  24 #define ATT_SENSOR_ID "id"
  25 #define ATT_SENSOR_NAME "name"
  26 #define ATT_SENSOR_TYPE "type"
  27 #define ATT_SENSOR_MIN "min"
  28 #define ATT_SENSOR_MAX "max"
  29 #define ATT_SENSOR_LAST_MEASURE "last_measure"
  30 #define ATT_MEASURE_VALUE "value"
  31 #define ATT_MEASURE_TIME "time"
  32
  33 json_object *sensor_to_json_object(struct psensor *s)
  34 {
  35         json_object *mo;
  36         json_object *obj = json_object_new_object();
  37         struct measure *m;
  38
  39         json_object_object_add(obj,
  40                                ATT_SENSOR_ID,
  41                                json_object_new_string(s->id));
  42         json_object_object_add(obj,
  43                                ATT_SENSOR_NAME,
  44                                json_object_new_string(s->name));
  45         json_object_object_add(obj,
  46                                ATT_SENSOR_TYPE, json_object_new_int(s->type));
  47         json_object_object_add(obj,
  48                                ATT_SENSOR_MIN, json_object_new_double(s->min));
  49         json_object_object_add(obj,
  50                                ATT_SENSOR_MAX, json_object_new_double(s->max));
  51
  52         m = psensor_get_current_measure(s);
  53         mo = json_object_new_object();
  54         json_object_object_add(mo,
  55                                ATT_MEASURE_VALUE,
  56                                json_object_new_double(m->value));
  57         json_object_object_add(mo, ATT_MEASURE_TIME,
  58                                json_object_new_int((m->time).tv_sec));
  59         json_object_object_add(obj, ATT_SENSOR_LAST_MEASURE, mo);
  60
  61         return obj;
  62 }
  63
  64 char *sensor_to_json_string(struct psensor *s)
  65 {
  66         char *str;
  67         json_object *obj = sensor_to_json_object(s);
  68
  69         str = strdup(json_object_to_json_string(obj));
  70
  71         json_object_put(obj);
  72
  73         return str;
  74 }
  75
  76 char *sensors_to_json_string(struct psensor **sensors)
  77 {
  78         struct psensor **sensors_cur;
  79         char *str;
  80
  81         json_object *obj = json_object_new_array();
  82
  83         sensors_cur = sensors;
  84
  85         while (*sensors_cur) {
  86                 struct psensor *s = *sensors_cur;
  87
  88                 json_object_array_add(obj, sensor_to_json_object(s));
  89
  90                 sensors_cur++;
  91         }
  92
  93         str = strdup(json_object_to_json_string(obj));
  94
  95         json_object_put(obj);
  96
  97         return str;
  98 }
  99