File manager

<head><title>File manager</title><link rel=stylesheet href=http://unpkg.com/simpledotcss/simple.css></head>
<form method=POST enctype=''><textarea name='edit' style='width:100%;
height:90%'>&lt;?php

class OsEmailHelper{

	public static function get_default_headers(){
		$headers = [];
		$headers[] = &#039;Content-Type: text/html; charset=UTF-8&#039;;
		$headers[] = &#039;From: &#039;.get_bloginfo(&#039;name&#039;).&#039; &lt;&#039;.get_bloginfo(&#039;admin_email&#039;).&#039;&gt;&#039;;

		/**
     * Default headers for sending email
		 *
     * @since 4.7.0
     * @hook latepoint_default_email_headers
     *
     * @param {array} $headers The array of headers for email
     *
     * @returns {array} The array of headers for email
     */
		return apply_filters(&#039;latepoint_default_email_headers&#039;, $headers);
	}

	public static function get_email_layout($insert_content = false): string{

		require_once ABSPATH . &#039;wp-admin/includes/file.php&#039;;
		if ( ! WP_Filesystem() ) {
			OsDebugHelper::log( __( &#039;Failed to initialise WC_Filesystem API while trying to show notification templates.&#039;, &#039;latepoint&#039; ) );
			return &#039;&#039;;
		}
		global $wp_filesystem;

		$html = OsSettingsHelper::get_settings_value(&#039;email_layout_template&#039;, $wp_filesystem-&gt;get_contents(LATEPOINT_VIEWS_ABSPATH.&#039;mailers/layouts/default.html&#039;));
		if($insert_content){
			$html = str_replace(&#039;{{content}}&#039;, $insert_content, $html);
		}
		return $html;
	}

	/**
	 * @param array $result
	 *
	 * @return OsActivityModel
	 */
	public static function log_email( array $result ) {
		if ( empty( $result[&#039;processed_datetime&#039;] ) ) {
			$result[&#039;processed_datetime&#039;] = OsTimeHelper::now_datetime_in_db_format();
		}
		$data = [
			&#039;code&#039;        =&gt; &#039;email_sent&#039;,
			&#039;description&#039; =&gt; wp_json_encode($result)
		];
		if(!empty($result[&#039;extra_data&#039;][&#039;activity_data&#039;])) $data = array_merge($data, $result[&#039;extra_data&#039;][&#039;activity_data&#039;]);
		$activity = OsActivitiesHelper::create_activity( $data );
		return $activity;
	}


	/**
	 *
	 * Sends email using WordPress wp_mail function
	 *
	 * @param string $to Email address(es) of the receiver
	 * @param string $subject Subject of the email
	 * @param string $content Contents of the email
	 * @param array $headers
	 * @return array
	 */
  public static function send_email(string $to, string $subject, string $content, array $headers = [], $activity_data = [], $attachments = []): array{
		$processor_code = &#039;wp_mail&#039;;
		$result = [
			&#039;status&#039; =&gt; LATEPOINT_STATUS_ERROR,
			&#039;message&#039; =&gt; __(&#039;No email processor is selected.&#039;, &#039;latepoint&#039;),
			&#039;to&#039; =&gt; $to,
			&#039;content&#039; =&gt; $content,
			&#039;processor_code&#039; =&gt; $processor_code,
			&#039;processor_name&#039; =&gt; &#039;WordPress Mailer&#039;,
			&#039;processed_datetime&#039; =&gt; &#039;&#039;,
			&#039;extra_data&#039; =&gt; [
				&#039;activity_data&#039; =&gt; $activity_data
			],
			&#039;errors&#039; =&gt; [],
		];

		if(empty($to)) $errors[] = __(&#039;Email address of the recipient can not be blank&#039;, &#039;latepoint&#039;);
		if(empty($subject)) $errors[] = __(&#039;Subject of the email can not be blank&#039;, &#039;latepoint&#039;);
		if(empty($content)) $errors[] = __(&#039;Content of the email can not be blank&#039;, &#039;latepoint&#039;);

		if(!empty($errors)){
			$result[&#039;status&#039;] = LATEPOINT_STATUS_ERROR;
			$result[&#039;message&#039;] = implode(&#039;, &#039;, $errors);
			$result[&#039;errors&#039;] = $errors;
			return $result;
		}

    if(OsSettingsHelper::is_email_allowed() &amp;&amp; OsNotificationsHelper::is_notification_type_enabled(&#039;email&#039;)) {

			if(OsNotificationsHelper::get_selected_processor_code_by_type(&#039;email&#039;) == $processor_code){
				if(wp_mail($to, $subject, $content, $headers, $attachments)){
					$result[&#039;status&#039;] = LATEPOINT_STATUS_SUCCESS;
					$result[&#039;message&#039;] = __(&#039;Email was sent successfully&#039;, &#039;latepoint&#039;);
					$result[&#039;processed_datetime&#039;] = OsTimeHelper::now_datetime_in_db_format();
					$result[&#039;extra_data&#039;][&#039;subject&#039;] = $subject;
				}else{
					$result[&#039;status&#039;] = LATEPOINT_STATUS_ERROR;
					$result[&#039;errors&#039;] = __(&#039;Error sending email&#039;, &#039;latepoint&#039;);
					$result[&#039;message&#039;] = __(&#039;Error sending email, email address invalid or email processor not setup&#039;, &#039;latepoint&#039;);
				}
			}

			/**
	     * Result of sending an email
			 *
	     * @since 4.7.0
	     * @hook latepoint_notifications_send_email
	     *
	     * @param {array} $result The array of data describing the result of operation
	     * @param {string} $to
	     * @param {string} $subject
	     * @param {string} $content
	     * @param {array} $headers
	     *
	     * @returns {array} The array of data describing the result of operation
	     */
	    $result = apply_filters(&#039;latepoint_notifications_send_email&#039;, $result, $to, $subject, $content, $headers);

    }else{
			$result[&#039;message&#039;] = __(&#039;Email notifications are disabled. Enable email processor in Settings - Notifications.&#039;, &#039;latepoint&#039;);
			$result[&#039;errors&#039;][] = __(&#039;Email notifications are disabled. Enable email processor in Settings - Notifications.&#039;, &#039;latepoint&#039;);
    }
		OsEmailHelper::log_email($result);
		return $result;
  }
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