<?php
// Own namespace
namespace Org\Mxchange\CoreFramework\Mailer;

// Import framework stuff
use Org\Mxchange\CoreFramework\Bootstrap\FrameworkBootstrap;
use Org\Mxchange\CoreFramework\Generic\FrameworkInterface;
use Org\Mxchange\CoreFramework\Manager\Login\ManageableMember;
use Org\Mxchange\CoreFramework\Object\BaseFrameworkSystem;
use Org\Mxchange\CoreFramework\Traits\Template\CompileableTemplateTrait;

/**
 * A general mailer class for all other mailers
 *
 * @author		Roland Haeder <webmaster@shipsimu.org>
 * @version		0.0.0
 * @copyright	Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2023 Core Developer Team
 * @license		GNU GPL 3.0 or any newer version
 * @link		http://www.shipsimu.org
 *
 * 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 3 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
abstract class BaseMailer extends BaseFrameworkSystem {
	// Load traits
	use CompileableTemplateTrait;

	/**
	 * Template name
	 */
	private $templateName = '';

	/**
	 * Protected constructor
	 *
	 * @param	$className	Name of the class
	 * @return	void
	 */
	protected function __construct (string $className) {
		// Call parent constructor
		parent::__construct($className);
	}

	/**
	 * Loads a text or HTML template depending on configuration into the template engine
	 *
	 * @param	$templateName	Name of the template we shall load
	 * @return	void
	 */
	protected final function loadTemplate (string $templateName) {
		// Set template name
		$this->setTemplateName($templateName);

		// Get configuration entry
		$templatePrefix = FrameworkBootstrap::getConfigurationInstance()->getConfigEntry('email_tpl_' . $templateName);

		// Load this email template
		$this->getTemplateInstance()->loadEmailTemplate($templatePrefix . '_' . $templateName);
	}

	/**
	 * Adds a user class to the recipient list for current template
	 *
	 * @param	$userInstance	An instance of a user class
	 * @return	void
	 */
	public function addRecipientByUserInstance (ManageableMember $userInstance) {
		// Get template name
		$templateName = $this->getTemplateName();

		// Is the list initialized?
		$this->pushValueToGenericArrayKey('recipients', $templateName, 'recipients', $userInstance);
	}

	/**
	 * Adds a template variable (just the name) to the recipient list in given section of current template
	 *
	 * @param	$section		Section can be 'config' or "value" currently
	 * @param	$variableName	Template variable name to add
	 * @return	void
	 */
	private final function addTemplateVariable ($section, $variableName) {
		// Get template name
		$templateName = $this->getTemplateName();

		// Generate full section name
		$sectionName = $section . '_vars';

		// Is the list initialized?
		$this->setGenericArrayElement('recipients', $templateName, $sectionName, $variableName, 'OK');
	}

	/**
	 * Adds a config template variable to the recipient list of current template
	 *
	 * @param	$variableName	Template variable name to add
	 * @return	void
	 */
	public final function addConfigTemplateVariable ($variableName) {
		$this->addTemplateVariable('config', $variableName);
	}

	/**
	 * Adds a 'value' template variable to the recipient list of current template
	 *
	 * @param	$variableName	Template variable name to add
	 * @return	void
	 */
	public final function addValueTemplateVariable ($variableName) {
		$this->addTemplateVariable('value', $variableName);
	}

	/**
	 * Adds a value instance for a given variable name. It should be set!
	 *
	 * @param	$variableName	Template variable we want to assign a value instance
	 * @param	$valueInstance	An object instance which can provide "field values"
	 * @return	void
	 */
	public final function addValueInstance (string $variableName, FrameworkInterface $valueInstance) {
		$this->setGenericArrayElement('recipients', $this->getTemplateName(), 'values', $variableName, $valueInstance);
	}

	/**
	 * Protected setter for template name
	 *
	 * @param	$templateName	Name of email template
	 * @return	void
	 */
	public final function setTemplateName (string $templateName) {
		$this->templateName = $templateName;
	}

	/**
	 * Protected getter for template name
	 *
	 * @return	$templateName	Name of email template
	 */
	protected final function getTemplateName () {
		return $this->templateName;
	}

	/**
	 * Setter for subject line
	 *
	 * @param	$subjectLine	Subject line to set
	 * @return	void
	 */
	public final function setSubjectLine (string $subjectLine) {
		$this->setGenericArrayElement('recipients', $this->getTemplateName(), 'generic', 'subject', $subjectLine);
	}

	/**
	 * Getter for subject line or null if not found
	 *
	 * @return	$subjectLine	Subject line to set
	 */
	public final function getSubjectLine () {
		// Default subject is null
		$subjectLine = NULL;

		// Get template name
		$templateName = $this->getTemplateName();

		// Does the subject line exist?
		if ((!empty($templateName)) && ($this->isGenericArrayElementSet('recipients', $templateName, 'generic', 'subject'))) {
			// Then use it
			$subjectLine = $this->getGenericArrayElement('recipients', $templateName, 'generic', 'subject');
		}

		// Return it
		return $subjectLine;
	}

	/**
	 * Use subject line provided by the (XML) template otherwise a subject line must be set
	 *
	 * @return	void
	 */
	public function useSubjectFromTemplate () {
		// Set the subject line
		$this->setSubjectLine('{?subject?}');
	}

	/**
	 * Getter for recipient list array
	 *
	 * @return	$recipientList	Array with reciepients
	 */
	public final function getRecipientList () {
		return $this->getGenericArray('recipients');
	}

}