Eel NumberGenerator

NumberGenerator.php

<?php
namespace CE\Devis\Invoice;

/*                                                                        *
 * This script belongs to the TYPO3 Flow framework.                       *
 *                                                                        *
 * It is free software; you can redistribute it and/or modify it under    *
 * the terms of the GNU Lesser General Public License, either version 3   *
 * of the License, or (at your option) any later version.                 *
 *                                                                        *
 * The TYPO3 project - inspiring people to share!                         *
 *                                                                        */

use CE\Devis\Domain\Model\InvoiceModule;
use TYPO3\Flow\Annotations as Flow;
use TYPO3\Flow\Http\Response;
use TYPO3\Flow\Mvc\ActionRequest;
use TYPO3\Flow\Mvc\RequestMatcher;
use TYPO3\Flow\Security\Account;

/**
 *
 */
class NumberGenerator {

	/**
	 * @var InvoiceModule
	 */
	protected $module;

	/**
	 * @var array
	 */
	protected $parts = array();

	/**
	 * @param InvoiceModule $request
	 */
	public function __construct($module = NULL) {
		$this->module = $module;
	}

	public function reset() {
		$this->parts = array();
	}

	public function getNumber() {
		return implode('', $this->parts);
	}

	public function cycleCounter($start, $step, $resetCycle) {
		$lastNumber = $this->module->getLastInvoiceNumber();
		$lastDate = new \DateTime($this->module->getLastInvoiceDate());

		if ($lastDate->format($resetCycle) !== date($resetCycle)) {
			$this->module->setLastInvoiceDate(date('d.m.Y'));
			$this->module->setLastInvoiceNumber($start);
			$nextNumber = $start;
		} else {
			$nextNumber = $lastNumber + $step;
			$this->module->setLastInvoiceNumber($nextNumber);
		}

		$this->parts[] = $nextNumber;

		return $this;
	}

	public function counter($start, $step) {
		$lastNumber = $this->module->getLastInvoiceNumber();

		if ($lastNumber < $start) {
			$this->module->setLastInvoiceDate(date('d.m.Y'));
			$this->module->setLastInvoiceNumber($start);
			$nextNumber = $start;
		} else {
			$nextNumber = $lastNumber + $step;
			$this->module->setLastInvoiceNumber($nextNumber);
		}

		$this->parts[] = $nextNumber;

		return $this;
	}

	public function numberFormat($length, $decimals) {
		$lastPart = array_pop($this->parts);
		$number = number_format($lastPart, $decimals);
		$this->parts[] = str_pad($number, $length, '0', STR_PAD_LEFT);

		return $this;
	}

	public function date($format) {
		$this->parts[] = date($format);
		return $this;
	}

	public function text($text) {
		$this->parts[] = $text;
		return $this;
	}
}
?>

Usage.php

<?php
class foo {
    public function generateInvoiceNumber() {
        $generator = new NumberGenerator($this);
        $context = new Context($generator);
        $eelEvaluator = new CompilingEvaluator();
        $eelEvaluator->evaluate($this->invoiceNumberFormat, $context);
        return $generator->getNumber();
    }
}