path: root/calendar/calobj.h

/*
 * Internal representation of a Calendar object.  This is modeled after the
 * iCalendar/vCalendar specificiation
 *
 * Authors: Miguel de Icaza (miguel@gnu.org)
 *          Federico Mena (quartic@gimp.org).
 */
#ifndef CALOBJ_H
#define CALOBJ_H

#include <libgnome/libgnome.h>
#include "versit/vcc.h"

BEGIN_GNOME_DECLS

enum AlarmType {
    ALARM_MAIL,
    ALARM_PROGRAM,
    ALARM_DISPLAY,
    ALARM_AUDIO
};

enum AlarmUnit {
    ALARM_MINUTES,
    ALARM_HOURS,
    ALARM_DAYS
};

typedef struct {
    enum AlarmType type;
    int            enabled;
    int            count;
    enum AlarmUnit units;
    char           *data;

    /* Does not get saved, internally used */
    time_t         offset;
    time_t         trigger;
    
    /* Widgets */
    void           *w_count;      /* A GtkEntry */
    void           *w_enabled;    /* A GtkChecButton */
    void           *w_timesel;    /* A GtkMenu */
    void           *w_entry;      /* A GnomeEntryFile/GtkEntry for PROGRAM/MAIL */
    void           *w_label;
} CalendarAlarm;

/* Calendar object type */
typedef enum {
    ICAL_EVENT,
    ICAL_TODO,
    ICAL_JOURNAL,
    ICAL_FBREQUEST,
    ICAL_FBREPLY,
    ICAL_BUSYTIME,
    ICAL_TIMEZONE
} iCalType;

/* For keys that might contain binary or text/binary */
typedef struct {
    char *data;
    int  len;
} iCalValue;

typedef struct {
    int     valid;      /* true if the Geography was specified */
    double  latitude;
    double  longitude;
} iCalGeo;

typedef enum {
    ICAL_OPAQUE,
    ICAL_TRANSPARENT
} iCalTransp;

typedef char NotYet;

enum RecurType {
    RECUR_DAILY,
    RECUR_WEEKLY,
    RECUR_MONTHLY_BY_POS,
    RECUR_MONTHLY_BY_DAY,
    RECUR_YEARLY_BY_MONTH,
    RECUR_YEARLY_BY_DAY,
};

#define DAY_LASTDAY 10000

typedef struct {
    enum RecurType type;

    int            interval;

    /* Used for recur computation */
    time_t         enddate; /* If the value is zero, it is an infinite event
                 * otherwise, it is either the _enddate value (if
                 * this is what got specified)  or it is our computed
                 * ending date (computed from the duration item).
                 */
    
    int            weekday;

    union {
        int    month_pos;
        int    month_day;
    } u;

    int            duration;
    time_t         _enddate; /* As found on the vCalendar file */
    int            __count;
} Recurrence;
#define IS_INFINITE(r) (r->duration == 0)

/* Flags to indicate what has changed in an object */
typedef enum {
    CHANGE_NEW     = 1 << 0,    /* new object */
    CHANGE_SUMMARY = 1 << 1,    /* summary */
    CHANGE_DATES   = 1 << 2,    /* dtstart / dtend */
    CHANGE_ALL     = CHANGE_SUMMARY | CHANGE_DATES
} CalObjectChange;

/*
 * This describes an iCalendar object, note that we never store durations, instead we
 * always compute the end time computed from the start + duration.
 */
typedef struct {
    iCalType      type;

    GList         *attach;      /* type: one or more URIs or binary data */
    GList         *attendee;    /* type: CAL-ADDRESS */
    GList         *categories;  /* type: one or more TEXT */
    char          *class;

    char          *comment;     /* we collapse one or more TEXTs into one */
    time_t        completed;
    time_t        created;
    GList         *contact;     /* type: one or more TEXT */
    time_t        dtstamp;
    time_t        dtstart;
    time_t        dtend;
    GList         *exdate;      /* type: one or more time_t's */
    GList         *exrule;      /* type: one or more RECUR */
    iCalGeo       geo;
    time_t        last_mod;
    char          *location;
    char          *organizer;
    int           percent;
    int           priority;
    char          *rstatus;         /* request status for freebusy */
    GList         *related;     /* type: one or more TEXT */
    GList         *resources;   /* type: one or more TEXT */
    GList         *rdate;       /* type: one or more recurrence date */
    GList         *rrule;       /* type: one or more recurrence rules */
    int           seq;
    char          *status;
    char          *summary;
    iCalTransp    transp;
    char          *uid;
    char          *url;
    time_t        recurid;

    CalendarAlarm dalarm;
    CalendarAlarm aalarm;
    CalendarAlarm palarm;
    CalendarAlarm malarm;

    Recurrence    *recur;
    
    int new;
    void *user_data;        /* Generic data pointer */
} iCalObject;

/* The callback for the recurrence generator */
typedef int (*calendarfn)(iCalObject *, time_t, time_t, void *);

iCalObject *ical_new                        (char *comment, char *organizer, char *summary);
iCalObject *ical_object_new                 (void);
void        ical_object_destroy             (iCalObject *ico);
iCalObject *ical_object_create_from_vobject (VObject *obj, const char *object_name);
VObject    *ical_object_to_vobject          (iCalObject *ical);
void        ical_foreach                    (GList *events, calendarfn fn, void *closure);
void        ical_object_generate_events     (iCalObject *ico, time_t start, time_t end, calendarfn cb, void *closure);

/* Computes the enddate field of the recurrence based on the duration */
void        ical_object_compute_end         (iCalObject *ico);

/* Returns the number of seconds configured to trigger the alarm in advance to an event */
int         alarm_compute_offset (CalendarAlarm *a);

END_GNOME_DECLS

#endif