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Add half-year convention in depreciation for Models/Depreciable.php

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Minaev Dmitriy 2018-08-23 20:29:03 +03:00
parent 2d0df24ef3
commit 49ecc08398
1 changed files with 64 additions and 0 deletions
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64
app/Models/Depreciable.php
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@ -60,6 +60,64 @@ class Depreciable extends SnipeModel
return $current_value; return $current_value;
} }
/**
* @param onlyHalfFirstYear Boolean always applied only second half of the first year
* @return float|int
*/
public function getHalfYearDepreciatedValue($onlyHalfFirstYear = false)
{
// @link http://www.php.net/manual/en/class.dateinterval.php
$current_date = $this->getDateTime();
$purchase_date = date_create($this->purchase_date);
$currentYear = $this->get_fiscal_year( $current_date );
$purchaseYear = $this->get_fiscal_year( $purchase_date );
$yearsPast = $currentYear - $purchaseYear;
$deprecationYears = ceil($this->get_depreciation()->months / 12);
if( $onlyHalfFirstYear ) {
$yearsPast -= 0.5;
}
else {
if( !$this->is_first_half_of_year($purchase_date) ) {
$yearsPast -= 0.5;
}
}
if( !$this->is_first_half_of_year($current_date) ) {
$yearsPast += 0.5;
}
if($yearsPast >= $deprecationYears) {
$yearsPast = $deprecationYears;
}
else if($yearsPast < 0) {
$yearsPast = 0;
}
return $yearsPast / $deprecationYears * $this->purchase_cost;
}
/**
* @param \DateTime $date
* @return int
*/
protected function get_fiscal_year($date) {
$year = intval($date->format('Y'));
// also, maybe it'll have to set fiscal year date
if($date->format('nj') === '1231') {
return $year;
}
else {
return $year - 1;
}
}
/**
* @param \DateTime $date
* @return bool
*/
protected function is_first_half_of_year($date) {
$date0m0d = intval($date->format('md'));
return ($date0m0d < 601) || ($date0m0d >= 1231);
}
public function time_until_depreciated() public function time_until_depreciated()
{ {
// @link http://www.php.net/manual/en/class.datetime.php // @link http://www.php.net/manual/en/class.datetime.php
@ -81,4 +139,10 @@ class Depreciable extends SnipeModel
date_add($date, date_interval_create_from_date_string($this->get_depreciation()->months . ' months')); date_add($date, date_interval_create_from_date_string($this->get_depreciation()->months . ' months'));
return $date; //date_format($date, 'Y-m-d'); //don't bake-in format, for internationalization return $date; //date_format($date, 'Y-m-d'); //don't bake-in format, for internationalization
} }
// it's necessary for unit tests
protected function getDateTime($time = null)
{
return new \DateTime($time);
}
} }