<?php
/**
 * Transactional Emails Controller
 *
 * WooCommerce Emails Class which handles the sending on transactional emails and email templates. This class loads in available emails.
 *
 * @class 		WC_Emails
 * @version		2.3.0
 * @package		WooCommerce/Classes/Emails
 * @category	Class
 * @author 		WooThemes
 */
class WC_Emails {

	/** @var array Array of email notification classes */
	public $emails;

	/** @var WC_Emails The single instance of the class */
	protected static $_instance = null;

	/**
	 * Main WC_Emails Instance
	 *
	 * Ensures only one instance of WC_Emails is loaded or can be loaded.
	 *
	 * @since 2.1
	 * @static
	 * @return WC_Emails Main instance
	 */
	public static function instance() {
		if ( is_null( self::$_instance ) ) {
			self::$_instance = new self();
		}
		return self::$_instance;
	}

	/**
	 * Cloning is forbidden.
	 *
	 * @since 2.1
	 */
	public function __clone() {
		_doing_it_wrong( __FUNCTION__, __( 'Cheatin&#8217; huh?', 'woocommerce' ), '2.1' );
	}

	/**
	 * Unserializing instances of this class is forbidden.
	 *
	 * @since 2.1
	 */
	public function __wakeup() {
		_doing_it_wrong( __FUNCTION__, __( 'Cheatin&#8217; huh?', 'woocommerce' ), '2.1' );
	}

	/**
	 * Hook in all transactional emails
	 */
	public static function init_transactional_emails() {
		$email_actions = apply_filters( 'woocommerce_email_actions', array(
			'woocommerce_low_stock',
			'woocommerce_no_stock',
			'woocommerce_product_on_backorder',
			'woocommerce_order_status_pending_to_processing',
			'woocommerce_order_status_pending_to_completed',
			'woocommerce_order_status_pending_to_cancelled',
			'woocommerce_order_status_pending_to_on-hold',
			'woocommerce_order_status_failed_to_processing',
			'woocommerce_order_status_failed_to_completed',
			'woocommerce_order_status_on-hold_to_processing',
			'woocommerce_order_status_on-hold_to_cancelled',
			'woocommerce_order_status_completed',
			'woocommerce_new_customer_note',
			'woocommerce_created_customer'
		) );

		foreach ( $email_actions as $action ) {
			add_action( $action, array( __CLASS__, 'send_transactional_email' ), 10, 10 );
		}
	}

	/**
	 * Init the mailer instance and call the notifications for the current filter.
	 * @internal param array $args (default: array())
	 */
	public static function send_transactional_email() {
		self::instance();
		$args = func_get_args();
		do_action_ref_array( current_filter() . '_notification', $args );
	}

	/**
	 * Constructor for the email class hooks in all emails that can be sent.
	 *
	 */
	public function __construct() {
		$this->init();

		// Email Header, Footer and content hooks
		add_action( 'woocommerce_email_header', array( $this, 'email_header' ) );
		add_action( 'woocommerce_email_footer', array( $this, 'email_footer' ) );
		add_action( 'woocommerce_email_order_meta', array( $this, 'order_meta' ), 10, 3 );
		add_action( 'woocommerce_email_customer_details', array( $this, 'customer_details' ), 10, 3 );
		add_action( 'woocommerce_email_customer_details', array( $this, 'email_addresses' ), 10, 3 );

		// Hooks for sending emails during store events
		add_action( 'woocommerce_low_stock_notification', array( $this, 'low_stock' ) );
		add_action( 'woocommerce_no_stock_notification', array( $this, 'no_stock' ) );
		add_action( 'woocommerce_product_on_backorder_notification', array( $this, 'backorder' ) );
		add_action( 'woocommerce_created_customer_notification', array( $this, 'customer_new_account' ), 10, 3 );

		// Let 3rd parties unhook the above via this hook
		do_action( 'woocommerce_email', $this );
	}

	/**
	 * Init email classes
	 */
	public function init() {
		// Include email classes
		include_once( 'emails/class-wc-email.php' );

		$this->emails['WC_Email_New_Order']                 = include( 'emails/class-wc-email-new-order.php' );
		$this->emails['WC_Email_Cancelled_Order']           = include( 'emails/class-wc-email-cancelled-order.php' );
		$this->emails['WC_Email_Customer_Processing_Order'] = include( 'emails/class-wc-email-customer-processing-order.php' );
		$this->emails['WC_Email_Customer_Completed_Order']  = include( 'emails/class-wc-email-customer-completed-order.php' );
		$this->emails['WC_Email_Customer_Invoice']          = include( 'emails/class-wc-email-customer-invoice.php' );
		$this->emails['WC_Email_Customer_Note']             = include( 'emails/class-wc-email-customer-note.php' );
		$this->emails['WC_Email_Customer_Reset_Password']   = include( 'emails/class-wc-email-customer-reset-password.php' );
		$this->emails['WC_Email_Customer_New_Account']      = include( 'emails/class-wc-email-customer-new-account.php' );

		$this->emails = apply_filters( 'woocommerce_email_classes', $this->emails );

		// include css inliner
		if ( ! class_exists( 'Emogrifier' ) ) {
			include_once( 'libraries/class-emogrifier.php' );
		}
	}

	/**
	 * Return the email classes - used in admin to load settings.
	 *
	 * @return array
	 */
	public function get_emails() {
		return $this->emails;
	}

	/**
	 * Get from name for email.
	 *
	 * @return string
	 */
	public function get_from_name() {
		return wp_specialchars_decode( et_option( 'woocommerce_email_from_name' ) );
	}

	/**
	 * Get from email address.
	 *
	 * @return string
	 */
	public function get_from_address() {
		return get_option( 'woocommerce_email_from_address' );
	}

	/**
	 * Get the email header.
	 *
	 * @param mixed $email_heading heading for the email
	 */
	public function email_header( $email_heading ) {
		wc_get_template( 'emails/email-header.php', array( 'email_heading' => $email_heading ) );
	}

	/**
	 * Get the email footer.
	 */
	public function email_footer() {
		wc_get_template( 'emails/email-footer.php' );
	}

	/**
	 * Wraps a message in the woocommerce mail template.
	 *
	 * @param mixed $email_heading
	 * @param string $message
	 * @return string
	 */
	public function wrap_message( $email_heading, $message, $plain_text = false ) {
		// Buffer
		ob_start();

		do_action( 'woocommerce_email_header', $email_heading );

		echo wpautop( wptexturize( $message ) );

		do_action( 'woocommerce_email_footer' );

		// Get contents
		$message = ob_get_clean();

		return $message;
	}

	/**
	 * Send the email.
	 *
	 * @param mixed $to
	 * @param mixed $subject
	 * @param mixed $message
	 * @param string $headers (default: "Content-Type: text/html\r\n")
	 * @param string $attachments (default: "")
	 */
	public function send( $to, $subject, $message, $headers = "Content-Type: text/html\r\n", $attachments = "" ) {
		// Send
		$email = new WC_Email();
		$email->send( $to, $subject, $message, $headers, $attachments );
	}

	/**
	 * Prepare and send the customer invoice email on demand.
	 */
	public function customer_invoice( $order ) {
		$email = $this->emails['WC_Email_Customer_Invoice'];
		$email->trigger( $order );
	}

	/**
	 * Customer new account welcome email.
	 *
	 * @param int $customer_id
	 * @param array $new_customer_data
	 */
	public function customer_new_account( $customer_id, $new_customer_data = array(), $password_generated = false ) {
		if ( ! $customer_id ) {
			return;
		}

		$user_pass = ! empty( $new_customer_data['user_pass'] ) ? $new_customer_data['user_pass'] : '';

		$email = $this->emails['WC_Email_Customer_New_Account'];
		$email->trigger( $customer_id, $user_pass, $password_generated );
	}

	/**
	 * Add order meta to email templates.
	 *
	 * @param mixed $order
	 * @param bool $sent_to_admin (default: false)
	 * @param bool $plain_text (default: false)
	 * @return string
	 */
	public function order_meta( $order, $sent_to_admin = false, $plain_text = false ) {
		$fields = array();

		if ( $order->customer_note ) {
			$fields['customer_note'] = array(
				'label' => __( 'Note', 'woocommerce' ),
				'value' => wptexturize( $order->customer_note )
			);
		}

		$fields = apply_filters( 'woocommerce_email_order_meta_fields', $fields, $sent_to_admin, $order );

		/**
		 * Deprecated woocommerce_email_order_meta_keys filter
		 *
		 * @since 2.3.0
		 */
		$_fields = apply_filters( 'woocommerce_email_order_meta_keys', array(), $sent_to_admin );

		if ( $_fields ) {
			foreach ( $_fields as $key => $field ) {
				if ( is_numeric( $key ) ) {
					$key = $field;
				}

				$fields[ $key ] = array(
					'label' => wptexturize( $key ),
					'value' => wptexturize( get_post_meta( $order->id, $field, true ) )
				);
			}
		}

		if ( $fields ) {

			if ( $plain_text ) {

				foreach ( $fields as $field ) {
					if ( isset( $field['label'] ) && isset( $field['value'] ) && $field['value'] ) {
						echo $field['label'] . ': ' . $field['value'] . "\n";
					}
				}

			} else {

				foreach ( $fields as $field ) {
					if ( isset( $field['label'] ) && isset( $field['value'] ) && $field['value'] ) {
						echo '<p><strong>' . $field['label'] . ':</strong> ' . $field['value'] . '</p>';
					}
				}
			}
		}
	}

	/**
	 * Add customer details to email templates.
	 *
	 * @param mixed $order
	 * @param bool $sent_to_admin (default: false)
	 * @param bool $plain_text (default: false)
	 * @return string
	 */
	public function customer_details( $order, $sent_to_admin = false, $plain_text = false ) {
		$fields = array();

		if ( $order->billing_email ) {
			$fields['billing_email'] = array(
				'label' => __( 'Email', 'woocommerce' ),
				'value' => wptexturize( $order->billing_email )
			);
	    }

	    if ( $order->billing_phone ) {
			$fields['billing_phone'] = array(
				'label' => __( 'Tel', 'woocommerce' ),
				'value' => wptexturize( $order->billing_phone )
			);
	    }

		$fields = apply_filters( 'woocommerce_email_customer_details_fields', $fields, $sent_to_admin, $order );

		if ( $fields ) {

			$heading = $sent_to_admin ? __( 'Customer details', 'woocommerce' ) : __( 'Your details', 'woocommerce' );

			$heading = apply_filters( 'woocommerce_email_custom_details_header', $heading, $sent_to_admin, $order );

			if ( $plain_text ) {

				echo $heading . "\n\n";

				foreach ( $fields as $field ) {
					if ( isset( $field['label'] ) && isset( $field['value'] ) && $field['value'] ) {
						echo $field['label'] . ': ' . $field['value'] . "\n";
					}
				}

			} else {

				echo '<h2>' . $heading . '</h2>';

				foreach ( $fields as $field ) {
					if ( isset( $field['label'] ) && isset( $field['value'] ) && $field['value'] ) {
						echo '<p><strong>' . $field['label'] . ':</strong> ' . $field['value'] . '</p>';
					}
				}
			}

		}

	}

	/**
	 * Get the email addresses.
	 *
	 * @return void
	 */
	public function email_addresses( $order, $sent_to_admin = false, $plain_text = false ) {
		wc_get_template( 'emails/email-addresses.php', array( 'order' => $order ) );
	}

	/**
	 * Get blog name formatted for emails
	 * @return string
	 */
	private function get_blogname() {
		return wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES );
	}

	/**
	 * Low stock notification email.
	 *
	 * @param WC_Product $product
	 */
	public function low_stock( $product ) {
		$subject = sprintf( '[%s] %s', $this->get_blogname(), __( 'Product low in stock', 'woocommerce' ) );
		$message = sprintf( __( '%s is low in stock.', 'woocommerce' ), html_entity_decode( strip_tags( $product->get_formatted_name() ) ) );

		wp_mail(
			apply_filters( 'woocommerce_email_recipient_low_stock', get_option( 'woocommerce_stock_email_recipient' ), $product ),
			apply_filters( 'woocommerce_email_subject_low_stock', $subject, $product ),
			apply_filters( 'woocommerce_email_content_low_stock', $message, $product ),
			apply_filters( 'woocommerce_email_headers', '', 'low_stock', $product ),
			apply_filters( 'woocommerce_email_attachments', array(), 'low_stock', $product )
		);
	}

	/**
	 * No stock notification email.
	 *
	 * @param WC_Product $product
	 */
	public function no_stock( $product ) {
		$subject = sprintf( '[%s] %s', $this->get_blogname(), __( 'Product out of stock', 'woocommerce' ) );
		$message = sprintf( __( '%s is out of stock.', 'woocommerce' ), html_entity_decode( strip_tags( $product->get_formatted_name() ) ) );

		wp_mail(
			apply_filters( 'woocommerce_email_recipient_no_stock', get_option( 'woocommerce_stock_email_recipient' ), $product ),
			apply_filters( 'woocommerce_email_subject_no_stock', $subject, $product ),
			apply_filters( 'woocommerce_email_content_no_stock', $message, $product ),
			apply_filters( 'woocommerce_email_headers', '', 'no_stock', $product ),
			apply_filters( 'woocommerce_email_attachments', array(), 'no_stock', $product )
		);
	}

	/**
	 * Backorder notification email.
	 *
	 * @param array $args
	 */
	public function backorder( $args ) {
		$args = wp_parse_args( $args, array(
			'product'  => '',
			'quantity' => '',
			'order_id' => ''
		) );

		extract( $args );

		if ( ! $product || ! $quantity || ! ( $order = wc_get_order( $order_id ) ) ) {
			return;
		}

		$subject = sprintf( '[%s] %s', $this->get_blogname(), __( 'Product Backorder', 'woocommerce' ) );
		$message = sprintf( __( '%s units of %s have been backordered in order #%s.', 'woocommerce' ), $quantity, html_entity_decode( strip_tags( $product->get_formatted_name() ) ), $order->get_order_number() );

		wp_mail(
			apply_filters( 'woocommerce_email_recipient_backorder', get_option( 'woocommerce_stock_email_recipient' ), $args ),
			apply_filters( 'woocommerce_email_subject_backorder', $subject, $args ),
			apply_filters( 'woocommerce_email_content_backorder', $message, $args ),
			apply_filters( 'woocommerce_email_headers', '', 'backorder', $args ),
			apply_filters( 'woocommerce_email_attachments', array(), 'backorder', $args )
		);
	}
}