src/screen_reader_system.c

   1 #include <device/battery.h>
   2 #include <device/display.h>
   3 #include <device/callback.h>
   4 #include "screen_reader.h"
   5 #include "screen_reader_tts.h"
   6 #include "smart_notification.h"
   7 #include "logger.h"
   8
   9 #define CHARGING "Battery charger connected"
  10 #define NOT_CHARGING "Battery charger disconnected"
  11 #define SCREEN_ON "Screen is on"
  12 #define SCREEN_OFF "Screen is off"
  13 #define BATTERY_LOW "Battery level is low"
  14 #define BATTERY_FULL "Battery level is full"
  15 #define BATTERY_CRITICAL "Battery level is critical"
  16
  17 static void device_system_cb(device_callback_e type, void *value, void *user_data);
  18
  19 /**
  20  * @brief Initializer for smart notifications
  21  *
  22  */
  23 void system_notifications_init(void)
  24 {
  25     // BATTERY LOW/FULL
  26     device_add_callback(DEVICE_CALLBACK_BATTERY_LEVEL, device_system_cb, NULL);
  27     // BATTERY CHARGING/NOT-CHARGING
  28     device_add_callback(DEVICE_CALLBACK_BATTERY_CHARGING, device_system_cb, NULL);
  29     // SCREEN OFF/ON
  30     device_add_callback(DEVICE_CALLBACK_DISPLAY_STATE, device_system_cb, NULL);
  31 }
  32
  33 /**
  34  * @brief Initializer for smart notifications
  35  *
  36  */
  37 void system_notifications_shutdown(void)
  38 {
  39     // BATTERY LOW/FULL
  40     device_remove_callback(DEVICE_CALLBACK_BATTERY_LEVEL, device_system_cb);
  41     // BATTERY CHARGING/NOT-CHARGING
  42     device_remove_callback(DEVICE_CALLBACK_BATTERY_CHARGING, device_system_cb);
  43     // SCREEN OFF/ON
  44     device_remove_callback(DEVICE_CALLBACK_DISPLAY_STATE, device_system_cb);
  45 }
  46
  47 /**
  48  * @brief Device system callback handler
  49  *
  50  * @param type Device callback type
  51  * @param value UNUSED
  52  * @param user_data UNUSED
  53  */
  54 static void device_system_cb(device_callback_e type, void *value, void *user_data)
  55 {
  56     if(type == DEVICE_CALLBACK_BATTERY_LEVEL)
  57       {
  58          device_battery_level_e status;
  59          if(device_battery_get_level_status(&status))
  60            {
  61               ERROR("Cannot get battery level status");
  62               return;
  63            }
  64
  65          if(status == DEVICE_BATTERY_LEVEL_LOW)
  66            {
  67               tts_speak(BATTERY_LOW, TRUE);
  68            }
  69          else if(status == DEVICE_BATTERY_LEVEL_CRITICAL)
  70            {
  71               tts_speak(BATTERY_CRITICAL, TRUE);
  72            }
  73          else if(status == DEVICE_BATTERY_LEVEL_FULL)
  74            {
  75               tts_speak(BATTERY_FULL, TRUE);
  76            }
  77       }
  78     else if(type == DEVICE_CALLBACK_BATTERY_CHARGING)
  79       {
  80          bool charging;
  81          if(device_battery_is_charging(&charging))
  82            {
  83               ERROR("Cannot check if battery is charging");
  84               return;
  85            }
  86
  87          if(charging)
  88            {
  89               tts_speak(CHARGING, FALSE);
  90            }
  91          else
  92            {
  93               tts_speak(NOT_CHARGING, FALSE);
  94            }
  95       }
  96     else if(type == DEVICE_CALLBACK_DISPLAY_STATE)
  97       {
  98          display_state_e state;
  99          if(device_display_get_state(&state))
 100            {
 101               ERROR("Cannot check if battery is charging");
 102               return;
 103            }
 104
 105          if(state == DISPLAY_STATE_NORMAL)
 106            {
 107               tts_speak(SCREEN_ON, FALSE);
 108            }
 109          else if(state == DISPLAY_STATE_SCREEN_OFF)
 110            {
 111               tts_speak(SCREEN_OFF, FALSE);
 112            }
 113       }
 114 }