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<?php |
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|
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namespace SyncBasalam\Utilities; |
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|
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defined('ABSPATH') || exit; |
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|
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/** |
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* A price adjustment value is one of: |
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* - 'commission' : calculated from the Basalam category commission |
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* - -100 to 100 : a percentage (negative means a price reduction; capped at 35% either way) |
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* - outside that range : a fixed amount in Toman (negative means a reduction) |
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*/ |
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class PriceAdjustment |
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{ |
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public const COMMISSION = 'commission'; |
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|
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/** Range in which a value is read as a percentage; outside it the value is a fixed Toman amount. */ |
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public const PERCENT_RANGE_MIN = -100; |
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public const PERCENT_RANGE_MAX = 100; |
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|
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/** Maximum allowed increase and decrease percentage. */ |
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public const MAX_PERCENT = 35; |
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public const MIN_PERCENT = -35; |
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|
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public static function isCommission($value): bool |
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{ |
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return $value === self::COMMISSION; |
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} |
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|
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public static function isPercent($value): bool |
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{ |
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return is_numeric($value) && intval($value) >= self::PERCENT_RANGE_MIN && intval($value) <= self::PERCENT_RANGE_MAX; |
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} |
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|
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/** |
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* Turns a raw input value into a storable value. |
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* |
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* @return string|null null means the value is empty or invalid |
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*/ |
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public static function normalize($value): ?string |
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{ |
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if (self::isCommission($value)) return self::COMMISSION; |
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|
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if ($value === '' || $value === null || !is_numeric($value)) return null; |
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|
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return (string) self::clamp(intval($value)); |
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} |
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|
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/** |
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* Clamps percentages to the allowed -35..35 range; fixed Toman amounts are left untouched. |
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*/ |
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public static function clamp(int $value): int |
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{ |
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if (!self::isPercent($value)) return $value; |
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|
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if ($value > self::MAX_PERCENT) return self::MAX_PERCENT; |
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if ($value < self::MIN_PERCENT) return self::MIN_PERCENT; |
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|
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return $value; |
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} |
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|
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public static function unitLabel($value): string |
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{ |
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if (self::isCommission($value) || !is_numeric($value)) return 'درصد'; |
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|
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return self::isPercent($value) ? 'درصد' : 'تو� |
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ان'; |
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} |
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} |
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|
