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<?php
/*
+-------------------------------------------------------------------------+
| Copyright (C) 2004-2024 The Cacti Group |
| |
| This program is free software; you can redistribute it and/or |
| modify it under the terms of the GNU General Public License |
| as published by the Free Software Foundation; either version 2 |
| of the License, or (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
+-------------------------------------------------------------------------+
| Cacti: The Complete RRDtool-based Graphing Solution |
+-------------------------------------------------------------------------+
| This code is designed, written, and maintained by the Cacti Group. See |
| about.php and/or the AUTHORS file for specific developer information. |
+-------------------------------------------------------------------------+
| http://www.cacti.net/ |
+-------------------------------------------------------------------------+
*/
/* get_timespan - returns start/end time for given date and timespan
* do NOT use absolute numbers of seconds but let php
* do all the time calculations to cover:
* leap years, daylight savings and weekdays ...
@arg $span - array &$timespan (begin_now, end_now)
@arg $curr_time - base date (time since epoch)
@arg $timespan_given - timespan as given by global_arrays.php($graph_timespans)
@arg $first_weekdayid - first weekday (numeric representation) */
function get_timespan(&$span, $curr_time, $timespan_given, $first_weekdayid) {
# unless changed later, $span['end_now'] is always $curr_time
$span['begin_now'] = $curr_time; # initialization only!
$span['end_now'] = $curr_time;
switch ($timespan_given) {
case GT_LAST_HALF_HOUR:
$span['begin_now'] = strtotime('-30 minutes', $curr_time);
break;
case GT_LAST_HOUR:
$span['begin_now'] = strtotime('-1 hour', $curr_time);
break;
case GT_LAST_2_HOURS:
$span['begin_now'] = strtotime('-2 hours', $curr_time);
break;
case GT_LAST_4_HOURS:
$span['begin_now'] = strtotime('-4 hours', $curr_time);
break;
case GT_LAST_6_HOURS:
$span['begin_now'] = strtotime('-6 hours', $curr_time);
break;
case GT_LAST_12_HOURS:
$span['begin_now'] = strtotime('-12 hours', $curr_time);
break;
case GT_LAST_DAY:
$span['begin_now'] = strtotime('-1 day', $curr_time);
break;
case GT_LAST_2_DAYS:
$span['begin_now'] = strtotime('-2 days', $curr_time);
break;
case GT_LAST_3_DAYS:
$span['begin_now'] = strtotime('-3 days', $curr_time);
break;
case GT_LAST_4_DAYS:
$span['begin_now'] = strtotime('-4 days', $curr_time);
break;
case GT_LAST_WEEK:
$span['begin_now'] = strtotime('-1 week', $curr_time);
break;
case GT_LAST_2_WEEKS:
$span['begin_now'] = strtotime('-2 weeks', $curr_time);
break;
case GT_LAST_MONTH:
$span['begin_now'] = strtotime('-1 month', $curr_time);
break;
case GT_LAST_2_MONTHS:
$span['begin_now'] = strtotime('-2 months', $curr_time);
break;
case GT_LAST_3_MONTHS:
$span['begin_now'] = strtotime('-3 months', $curr_time);
break;
case GT_LAST_4_MONTHS:
$span['begin_now'] = strtotime('-4 months', $curr_time);
break;
case GT_LAST_6_MONTHS:
$span['begin_now'] = strtotime('-6 months', $curr_time);
break;
case GT_LAST_YEAR:
$span['begin_now'] = strtotime('-1 year', $curr_time);
break;
case GT_LAST_2_YEARS:
$span['begin_now'] = strtotime('-2 years', $curr_time);
break;
case GT_DAY_SHIFT:
# take this day, start and end time fetched from config_settings
$span['begin_now'] = strtotime(date('Y-m-d', $curr_time) . ' ' . read_user_setting('day_shift_start'));
$span['end_now'] = strtotime(date('Y-m-d', $curr_time) . ' ' . read_user_setting('day_shift_end'));
break;
case GT_THIS_DAY:
# return Year-Month-Day for given 'time since epoch'
# and convert this to 'time since epoch' (Hour:Minute:Second set to 00:00:00)
$span['begin_now'] = strtotime(date('Y-m-d', $curr_time));
$span['end_now'] = strtotime('+1 day', $span['begin_now']) - 1;
break;
case GT_THIS_WEEK:
# compute offset to start-of-week
# remember: start-of-week may be > current-weekday, so do modulo calc
$offset = (date('w',$curr_time) - $first_weekdayid + 7) % 7;
$span['begin_now'] = strtotime( '-' . $offset . ' days' . date('Y-m-d', $curr_time));
$span['end_now'] = strtotime('+1 week', $span['begin_now']) - 1;
break;
case GT_THIS_MONTH:
# this date format set day-of-month to 01
$span['begin_now'] = strtotime(date('Y-m-01', $curr_time));
$span['end_now'] = strtotime('+1 month', $span['begin_now']) - 1;
break;
case GT_THIS_YEAR:
# this date format set day-of-month to 01 and month-of-year to 01
$span['begin_now'] = strtotime(date('Y-01-01', $curr_time));
$span['end_now'] = strtotime('+1 year', $span['begin_now']) - 1;
break;
case GT_PREV_DAY:
$span['begin_now'] = strtotime('-1 day' . date('Y-m-d', $curr_time));
$span['end_now'] = strtotime('+1 day', $span['begin_now']) - 1;
break;
case GT_PREV_WEEK:
# compute offset to start-of-week
# remember: start-of-week may be > current-weekday, so do modulo calc
$offset = (date('w',$curr_time) - $first_weekdayid + 7) % 7;
$span['begin_now'] = strtotime( '-1 week -' . $offset . ' days' . date('Y-m-d', $curr_time));
$span['end_now'] = strtotime('+1 week', $span['begin_now']) - 1;
break;
case GT_PREV_MONTH:
$span['begin_now'] = strtotime('-1 month' . date('Y-m-01', $curr_time));
$span['end_now'] = strtotime('+1 month', $span['begin_now']) - 1;
break;
case GT_PREV_YEAR:
$span['begin_now'] = strtotime('-1 year' . date('Y-01-01', $curr_time));
$span['end_now'] = strtotime('+1 year', $span['begin_now']) - 1;
break;
default:
$span['begin_now'] = $curr_time - DEFAULT_TIMESPAN;
break;
}
# reformat time-since-epoch start/end times to human readable format
$span['current_value_date1'] = date('Y-m-d H:i',$span['begin_now']);
$span['current_value_date2'] = date('Y-m-d H:i',$span['end_now']);
}
/* month_shift - check for shifting one or more months
* @arg $shift_size - requested shift amount
* returns - true, if month shifting required, else false
*/
function month_shift($shift_size) {
# is monthly shifting required?
return ( strpos(strtolower($shift_size), 'month') > 0);
}
/* check_month_boundaries - check given boundaries for begin/end of month matching
* @arg $span - array $timespan with given boundaries
* returns - true, if begin AND end match month begin/end boundaries
*/
function check_month_boundaries(&$span) {
# check left boundary -----------------------------------------------
$begin_of_month = strtotime(date('Y-m-01', $span['begin_now']));
$begin_match = ( $begin_of_month == $span['begin_now']);
# check right boundary ----------------------------------------------
# first, get a defined date of the month, $span['end_now'] belongs to
$begin_of_month = strtotime(date('Y-m-01', $span['end_now']));
# do "end of month" magic to get end_of_month for arbitrary months
$end_of_month = strtotime('+1 month', $begin_of_month) - 1;
# accept end of month if no seconds given (adjust for 59 missing seconds)
$end_match = ( (($end_of_month - 59) <= $span['end_now']) && ($span['end_now'] <= $end_of_month));
return ( $begin_match && $end_match );
}
/* shift_right_boundary - shift right boundary with end-of-month adjustment
* @arg $span - timespan array
* @arg $direction - shift left/right (-/+)
* @arg $shift_size - amount of shift
* returns - time-since-epoch for shifted right boundary
*/
function shift_right_boundary(&$span, $direction, $shift_size) {
# first, get begin of the month, $span['end_now'] belongs to
$begin = date('Y-m-01', $span['end_now']);
# shift the begin date to correct month
$begin_of_shifted_month = strtotime($direction . $shift_size . ' ' . $begin);
# do "end of month" magic
return strtotime('+1 month', $begin_of_shifted_month) - 1;
}
/* shift_time - shift given timespan left/right
* @arg &$span - given timespan (start/end time as time-since-epoch and human readable)
* @arg $direction - "-" for shifting left, "+" for shifting right
* @arg $timeshift - amount of shifting
*/
function shift_time(&$span, $direction, $shift_size) {
# move left/right according to $direction
# amount to be moved is derived from $shift_size
# base dates are taken from array $span
# is this a month shift AND current timespan is on month boundaries?
if ( month_shift($shift_size) && check_month_boundaries($span) ) {
# shift left boundary
$span['begin_now'] = strtotime($direction . $shift_size . ' ' . $span['current_value_date1']);
# shifting right boundary is somewhat complicated
$span['end_now'] = shift_right_boundary($span, $direction, $shift_size);
} else {
# 'normal' time shifting: use strtotime magic
$span['begin_now'] = strtotime($direction . $shift_size . ' ' . $span['current_value_date1']);
$span['end_now'] = strtotime($direction . $shift_size . ' ' . $span['current_value_date2']);
}
# convert to human readable format
$span['current_value_date1'] = date('Y-m-d H:i', $span['begin_now']);
$span['current_value_date2'] = date('Y-m-d H:i', $span['end_now']);
# now custom time settings in effect
$_SESSION['sess_current_timespan'] = GT_CUSTOM;
$_SESSION['custom'] = 1;
set_request_var('predefined_timespan', GT_CUSTOM);
}
|
