#define DAY_RECORD_DATE     9
#define APP_RECORD_TITLE   41
#define APP_RECORD_INFO   301 

#define CAL_OK              1
#define CAL_ERROR           0
#define CAL_CREATE          1
#define CAL_CHECK           0

#define CAL_READ           "r+"
#define CAL_WRITE          "w"

#define DAY_COMPARE_EQUAL   0
#define DAY_COMPARE_BEFORE -1
#define DAY_COMPARE_AFTER   1
#define MAX_PARTICIPANTS    10


typedef struct dayApp *dayAppP;
typedef struct appList *appListP;
typedef struct calList *calListP;

struct participant {
   char alias[40];
};

struct dayApp {
   int start;
   int end;
   char title[APP_RECORD_TITLE];
   char info[APP_RECORD_INFO];
   int  status;
   int participants_count;
   struct participant participants[MAX_PARTICIPANTS];
};


struct appList {
   struct dayApp app;
   appListP next;
   appListP previous;
   calListP day_rec;
};

struct dayStruct {
   long date;
   int app_counter;
};

struct calList {
   struct dayStruct day_struct;
   appListP app_list;
   calListP previous;
   calListP next;
};



/* AOPcalDb exported functions. */
extern int apiDbInitilizeDb(char *file_name);
extern int apiDbInsertAppointment(dayAppP rec, int year, int month, int day);
extern dayAppP apiDbGetDateAppointments(int year, int month, int day, int *counter);
extern dayAppP apiDbGetAppointment(int year, int month, int day, int start_time);
extern int apiDbDeleteAppointment(int year, int month, int day, int start_time);
extern int apiDbUpdateAppointment(int year, int month, int day, int start_time, dayAppP rec);