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citadel  8.12
Functions
ical_dezonify.c File Reference
#include "sysdep.h"
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <limits.h>
#include <stdio.h>
#include <string.h>
#include <strings.h>
#include <syslog.h>
#include <libical/ical.h>
#include <libcitadel.h>
#include "citadel.h"
#include "server.h"
#include "citserver.h"
#include "sysdep_decls.h"
#include "support.h"
#include "config.h"
#include "ical_dezonify.h"
#include "ctdl_module.h"

Go to the source code of this file.

Functions

icaltimezone * get_default_icaltimezone (void)
void ical_dezonify_backend (icalcomponent *cal, icalcomponent *rcal, icalproperty *prop)
void ical_dezonify_recurse (icalcomponent *cal, icalcomponent *rcal)
void ical_dezonify (icalcomponent *cal)

Function Documentation

icaltimezone* get_default_icaltimezone ( void  )

Definition at line 34 of file ical_dezonify.c.

                                             {

        icaltimezone *zone = NULL;
       char *default_zone_name = config.c_default_cal_zone;
       //char *default_zone_name = "America/New_York";

        if (!zone) {
                zone = icaltimezone_get_builtin_timezone(default_zone_name);
        }
        if (!zone) {
              syslog(LOG_ALERT,
                     "Unable to load '%s' time zone.  Defaulting to UTC.\n",
                     default_zone_name);
                zone = icaltimezone_get_utc_timezone();
       }
       if (!zone) {
              syslog(LOG_ALERT, "Unable to load UTC time zone!\n");
       }
        return zone;
}

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void ical_dezonify ( icalcomponent *  cal)

Definition at line 225 of file ical_dezonify.c.

                                       {
       icalcomponent *vt = NULL;

       /* syslog(LOG_DEBUG, "ical_dezonify() started\n"); */

       /* Convert all times to UTC */
       ical_dezonify_recurse(cal, cal);

       /* Strip out VTIMEZONE subcomponents -- we don't need them anymore */
       while (vt = icalcomponent_get_first_component(
                     cal, ICAL_VTIMEZONE_COMPONENT), vt != NULL) {
              icalcomponent_remove_component(cal, vt);
              icalcomponent_free(vt);
       }

       /* syslog(LOG_DEBUG, "ical_dezonify() completed\n"); */
}

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void ical_dezonify_backend ( icalcomponent *  cal,
icalcomponent *  rcal,
icalproperty *  prop 
)

< Component declared 'TZID=GMT' instead of using Z syntax

Definition at line 63 of file ical_dezonify.c.

                                         {

       icaltimezone *t = NULL;
       icalparameter *param;
       const char *tzid = NULL;
       struct icaltimetype TheTime;
       int utc_declared_as_tzid = 0;      
       /* Give me nothing and I will give you nothing in return. */
       if (cal == NULL) return;

       /* Hunt for a TZID parameter in this property. */
       param = icalproperty_get_first_parameter(prop, ICAL_TZID_PARAMETER);

       /* Get the stringish name of this TZID. */
       if (param != NULL) {
              tzid = icalparameter_get_tzid(param);

              /* Convert it to an icaltimezone type. */
              if (tzid != NULL) {
                     /* syslog(LOG_DEBUG, "                * Stringy supplied timezone is: '%s'\n", tzid); */
                     if ( (!strcasecmp(tzid, "UTC")) || (!strcasecmp(tzid, "GMT")) ) {
                            utc_declared_as_tzid = 1;
                            /* syslog(LOG_DEBUG, "                * ...and we handle that internally.\n"); */
                     }
                     else {
                            /* try attached first */
                            t = icalcomponent_get_timezone(cal, tzid);
/*
                            syslog(LOG_DEBUG, "                * ...and I %s have tzdata for that zone.\n",
                                   (t ? "DO" : "DO NOT")
                            );
*/
                            /* then try built-in timezones */
                            if (!t) {
                                   t = icaltimezone_get_builtin_timezone(tzid);
/*
                                   if (t) {
                                          syslog(LOG_DEBUG, "                * Using system tzdata!\n");
                                   }
*/
                            }
                     }
              }

       }

       /* Now we know the timezone.  Convert to UTC. */

       if (icalproperty_isa(prop) == ICAL_DTSTART_PROPERTY) {
              TheTime = icalproperty_get_dtstart(prop);
       }
       else if (icalproperty_isa(prop) == ICAL_DTEND_PROPERTY) {
              TheTime = icalproperty_get_dtend(prop);
       }
       else if (icalproperty_isa(prop) == ICAL_DUE_PROPERTY) {
              TheTime = icalproperty_get_due(prop);
       }
       else if (icalproperty_isa(prop) == ICAL_EXDATE_PROPERTY) {
              TheTime = icalproperty_get_exdate(prop);
       }
       else {
              return;
       }

       /* syslog(LOG_DEBUG, "                * Was: %s\n", icaltime_as_ical_string(TheTime)); */

       if (TheTime.is_utc) {
              /* syslog(LOG_DEBUG, "                * This property is ALREADY UTC.\n"); */
       }

       else if (utc_declared_as_tzid) {
              /* syslog(LOG_DEBUG, "                * Replacing '%s' TZID with 'Z' suffix.\n", tzid); */
              TheTime.is_utc = 1;
       }

       else {
              /* Do the conversion. */
              if (t != NULL) {
                     /* syslog(LOG_DEBUG, "                * Timezone prop found.  Converting to UTC.\n"); */
              }
              else {
                     /* syslog(LOG_DEBUG, "                * Converting default timezone to UTC.\n"); */
              }

              if (t == NULL) {
                     t = get_default_icaltimezone();
              }

              icaltimezone_convert_time(&TheTime,
                                   t,
                                   icaltimezone_get_utc_timezone()
              );
              TheTime.is_utc = 1;
       }

       icalproperty_remove_parameter_by_kind(prop, ICAL_TZID_PARAMETER);
       /* syslog(LOG_DEBUG, "                * Now: %s\n", icaltime_as_ical_string(TheTime)); */

       /* Now add the converted property back in. */
       if (icalproperty_isa(prop) == ICAL_DTSTART_PROPERTY) {
              icalproperty_set_dtstart(prop, TheTime);
       }
       else if (icalproperty_isa(prop) == ICAL_DTEND_PROPERTY) {
              icalproperty_set_dtend(prop, TheTime);
       }
       else if (icalproperty_isa(prop) == ICAL_DUE_PROPERTY) {
              icalproperty_set_due(prop, TheTime);
       }
       else if (icalproperty_isa(prop) == ICAL_EXDATE_PROPERTY) {
              icalproperty_set_exdate(prop, TheTime);
       }
}

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void ical_dezonify_recurse ( icalcomponent *  cal,
icalcomponent *  rcal 
)

Definition at line 183 of file ical_dezonify.c.

                                                                    {
       icalcomponent *c;
       icalproperty *p;

       /*
        * Recurse through all subcomponents *except* VTIMEZONE ones.
        */
       for (c=icalcomponent_get_first_component(
                                   rcal, ICAL_ANY_COMPONENT);
              c != NULL;
              c = icalcomponent_get_next_component(
                                   rcal, ICAL_ANY_COMPONENT)
       ) {
              if (icalcomponent_isa(c) != ICAL_VTIMEZONE_COMPONENT) {
                     ical_dezonify_recurse(cal, c);
              }
       }

       /*
        * Now look for DTSTART and DTEND properties
        */
       for (p=icalcomponent_get_first_property(rcal, ICAL_ANY_PROPERTY);
              p != NULL;
              p = icalcomponent_get_next_property(rcal, ICAL_ANY_PROPERTY)
       ) {
              if (
                     (icalproperty_isa(p) == ICAL_DTSTART_PROPERTY)
                     || (icalproperty_isa(p) == ICAL_DTEND_PROPERTY)
                     || (icalproperty_isa(p) == ICAL_DUE_PROPERTY)
                     || (icalproperty_isa(p) == ICAL_EXDATE_PROPERTY)
                 ) {
                     ical_dezonify_backend(cal, rcal, p);
              }
       }
}

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