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/******************************************************************************
* $Id$
*
* Project: MapServer
* Purpose: MapCache tile caching support file: time dimension support
* Author: Thomas Bonfort and the MapServer team.
*
******************************************************************************
* Copyright (c) 1996-2011 Regents of the University of Minnesota.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies of this Software or works derived from this Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*****************************************************************************/
#include "mapcache.h"
#include <apr_time.h>
#include <apr_strings.h>
#include <time.h>
typedef enum {
MAPCACHE_TINTERVAL_SECOND,
MAPCACHE_TINTERVAL_MINUTE,
MAPCACHE_TINTERVAL_HOUR,
MAPCACHE_TINTERVAL_DAY,
MAPCACHE_TINTERVAL_MONTH,
MAPCACHE_TINTERVAL_YEAR
} mapcache_time_interval_t;
#ifndef HAVE_TIMEGM
time_t timegm(struct tm *tm)
{
time_t t, tdiff;
struct tm in, gtime, ltime;
memcpy(&in, tm, sizeof(in));
t = mktime(&in);
memcpy(>ime, gmtime(&t), sizeof(gtime));
memcpy(<ime, localtime(&t), sizeof(ltime));
gtime.tm_isdst = ltime.tm_isdst;
tdiff = t - mktime(>ime);
memcpy(&in, tm, sizeof(in));
return mktime(&in) + tdiff;
}
#endif
char *mapcache_ogc_strptime(const char *value, struct tm *ts, mapcache_time_interval_t *ti) {
char *valueptr;
memset (ts, '\0', sizeof (*ts));
ts->tm_mday = 1;
valueptr = strptime(value,"%Y-%m-%dT%H:%M:%SZ",ts);
*ti = MAPCACHE_TINTERVAL_SECOND;
if(valueptr) return valueptr;
valueptr = strptime(value,"%Y-%m-%dT%H:%MZ",ts);
*ti = MAPCACHE_TINTERVAL_MINUTE;
if(valueptr) return valueptr;
valueptr = strptime(value,"%Y-%m-%dT%HZ",ts);
*ti = MAPCACHE_TINTERVAL_HOUR;
if(valueptr) return valueptr;
valueptr = strptime(value,"%Y-%m-%d",ts);
*ti = MAPCACHE_TINTERVAL_DAY;
if(valueptr) return valueptr;
valueptr = strptime(value,"%Y-%m",ts);
*ti = MAPCACHE_TINTERVAL_MONTH;
if(valueptr) return valueptr;
valueptr = strptime(value,"%Y",ts);
*ti = MAPCACHE_TINTERVAL_YEAR;
if(valueptr) return valueptr;
return NULL;
}
apr_array_header_t* mapcache_dimension_time_get_entries(mapcache_context *ctx, mapcache_dimension *dim, const char *dim_value,
mapcache_tileset *tileset, mapcache_extent *extent, mapcache_grid *grid, time_t *intervals, int n_intervals) {
int i;
apr_array_header_t *time_ids = apr_array_make(ctx->pool,0,sizeof(char*));
if(!dim->_get_entries_for_time_range) {
ctx->set_error(ctx,500,"dimension does not support time queries");
return NULL;
}
for(i=0;i<n_intervals;i++) {
apr_array_header_t *interval_ids = dim->_get_entries_for_time_range(ctx, dim, dim_value,
intervals[i*2], intervals[i*2+1],
tileset, extent, grid);
if(GC_HAS_ERROR(ctx)) {
return NULL;
}
apr_array_cat(time_ids, interval_ids);
}
return time_ids;
}
apr_array_header_t* mapcache_dimension_time_get_entries_for_value(mapcache_context *ctx, mapcache_dimension *dimension, const char *value,
mapcache_tileset *tileset, mapcache_extent *extent, mapcache_grid *grid) {
/* look if supplied value is a predefined key */
/* split multiple values, loop */
/* extract start and end values */
struct tm tm_start,tm_end;
time_t *intervals;
mapcache_time_interval_t tis,tie;
char *valueptr = apr_pstrdup(ctx->pool,value);
char *last,*key;
int count=1;
char * value_scan = (char *)value;
/*count how many time entries were supplied*/
for(; *value_scan; value_scan++) if(*value_scan == ',') count++;
intervals = apr_pcalloc(ctx->pool,2*count*sizeof(time_t));
count = 0;
/* Split the input on ',' */
for (key = apr_strtok(valueptr, ",", &last); key != NULL;
key = apr_strtok(NULL, ",", &last)) {
valueptr = mapcache_ogc_strptime(key,&tm_start,&tis);
if(!valueptr) {
ctx->set_error(ctx,400,"failed to parse time %s",value);
return NULL;
}
if(*valueptr == '/' || (*valueptr == '-' && *(valueptr+1) == '-')) {
/* we have a second (end) time */
if (*valueptr == '/') {
valueptr++;
}
else {
valueptr += 2;
}
valueptr = mapcache_ogc_strptime(valueptr,&tm_end,&tie);
if(!valueptr) {
ctx->set_error(ctx,400,"failed to parse end time in %s",value);
return NULL;
}
} else if(*valueptr == 0) {
tie = tis;
tm_end = tm_start;
} else {
ctx->set_error(ctx,400,"failed (2) to parse time %s",value);
return NULL;
}
switch(tie) {
case MAPCACHE_TINTERVAL_SECOND:
tm_end.tm_sec += 1;
break;
case MAPCACHE_TINTERVAL_MINUTE:
tm_end.tm_min += 1;
break;
case MAPCACHE_TINTERVAL_HOUR:
tm_end.tm_hour += 1;
break;
case MAPCACHE_TINTERVAL_DAY:
tm_end.tm_mday += 1;
break;
case MAPCACHE_TINTERVAL_MONTH:
tm_end.tm_mon += 1;
break;
case MAPCACHE_TINTERVAL_YEAR:
tm_end.tm_year += 1;
break;
}
intervals[count*2] = timegm(&tm_start);
intervals[count*2+1] = timegm(&tm_end);
count++;
}
return mapcache_dimension_time_get_entries(ctx,dimension,value,tileset,extent,grid,intervals,count);
/* end loop */
}
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