Brady Wetherington
063e5c407c
value (which were only used there). Additional fixes and refactoring around Depreciable, in terms of how assets get depreciation via models, and licenses get depreciation directly.
81 lines
2.3 KiB
PHP
81 lines
2.3 KiB
PHP
<?php
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class Depreciable extends Elegant
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{
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/**
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* Depreciation Relation, and associated helper methods
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*/
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//REQUIRES a purchase_date field
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// and a purchase_cost field
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//REQUIRES a get_depreciation method,
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//which will return the deprecation.
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//this is needed because assets get
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//their depreciation from a model,
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//whereas licenses have deprecations
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//directly associated with them.
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//assets will override the following
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//two methods in order to inherit from
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//their model instead of directly (like
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//here)
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public function depreciation()
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{
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return $this->belongsTo('Depreciation','depreciation_id');
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}
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public function get_depreciation()
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{
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return $this->depreciation;
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}
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/**
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* @param $purchase_cost
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* @param $purchase_date1
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* @return float|int
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*/
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public function getDepreciatedValue()
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{
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if (!$this->get_depreciation()) { // will never happen
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return $this->purchase_cost;
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}
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if ($this->get_depreciation()->months <= 0) {
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return $this->purchase_cost;
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}
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// fraction of value left
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$months_remaining = $this->time_until_depreciated()->m + $this->time_until_depreciated()->y; //UGlY
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$current_value = round(($months_remaining/ $this->get_depreciation()->months) * $this->purchase_cost, 2);
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if ($current_value < 0) {
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$current_value = 0;
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}
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return $current_value;
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}
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public function time_until_depreciated()
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{
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// @link http://www.php.net/manual/en/class.datetime.php
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$d1 = new DateTime();
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$d2 = $this->depreciated_date();
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// @link http://www.php.net/manual/en/class.dateinterval.php
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$interval = $d1->diff($d2);
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if(!$interval->invert) {
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return $interval;
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} else {
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return new DateInterval("PT0S"); //null interval (zero seconds from now)
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}
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}
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public function depreciated_date()
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{
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$date = date_create($this->purchase_date);
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date_add($date, date_interval_create_from_date_string($this->get_depreciation()->months . ' months'));
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return $date; //date_format($date, 'Y-m-d'); //don't bake-in format, for internationalization
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}
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} |