1<?php
2/**
3 * Gets the email message from the user's mailbox to add as
4 * a WordPress post. Mailbox connection information must be
5 * configured under Settings > Writing
6 *
7 * @package WordPress
8 */
9
10/** Make sure that the WordPress bootstrap has run before continuing. */
11require __DIR__ . '/wp-load.php';
12
13/** This filter is documented in wp-admin/options.php */
14if ( ! apply_filters( 'enable_post_by_email_configuration', true ) ) {
15	wp_die( __( 'This action has been disabled by the administrator.' ), 403 );
16}
17
18$mailserver_url = get_option( 'mailserver_url' );
19
20if ( 'mail.example.com' === $mailserver_url || empty( $mailserver_url ) ) {
21	wp_die( __( 'This action has been disabled by the administrator.' ), 403 );
22}
23
24/**
25 * Fires to allow a plugin to do a complete takeover of Post by Email.
26 *
27 * @since 2.9.0
28 */
29do_action( 'wp-mail.php' ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores
30
31/** Get the POP3 class with which to access the mailbox. */
32require_once ABSPATH . WPINC . '/class-pop3.php';
33
34/** Only check at this interval for new messages. */
35if ( ! defined( 'WP_MAIL_INTERVAL' ) ) {
36	define( 'WP_MAIL_INTERVAL', 5 * MINUTE_IN_SECONDS );
37}
38
39$last_checked = get_transient( 'mailserver_last_checked' );
40
41if ( $last_checked ) {
42	wp_die( __( 'Slow down cowboy, no need to check for new mails so often!' ) );
43}
44
45set_transient( 'mailserver_last_checked', true, WP_MAIL_INTERVAL );
46
47$time_difference = get_option( 'gmt_offset' ) * HOUR_IN_SECONDS;
48
49$phone_delim = '::';
50
51$pop3 = new POP3();
52
53if ( ! $pop3->connect( get_option( 'mailserver_url' ), get_option( 'mailserver_port' ) ) || ! $pop3->user( get_option( 'mailserver_login' ) ) ) {
54	wp_die( esc_html( $pop3->ERROR ) );
55}
56
57$count = $pop3->pass( get_option( 'mailserver_pass' ) );
58
59if ( false === $count ) {
60	wp_die( esc_html( $pop3->ERROR ) );
61}
62
63if ( 0 === $count ) {
64	$pop3->quit();
65	wp_die( __( 'There doesn&#8217;t seem to be any new mail.' ) );
66}
67
68for ( $i = 1; $i <= $count; $i++ ) {
69
70	$message = $pop3->get( $i );
71
72	$bodysignal                = false;
73	$boundary                  = '';
74	$charset                   = '';
75	$content                   = '';
76	$content_type              = '';
77	$content_transfer_encoding = '';
78	$post_author               = 1;
79	$author_found              = false;
80	foreach ( $message as $line ) {
81		// Body signal.
82		if ( strlen( $line ) < 3 ) {
83			$bodysignal = true;
84		}
85		if ( $bodysignal ) {
86			$content .= $line;
87		} else {
88			if ( preg_match( '/Content-Type: /i', $line ) ) {
89				$content_type = trim( $line );
90				$content_type = substr( $content_type, 14, strlen( $content_type ) - 14 );
91				$content_type = explode( ';', $content_type );
92				if ( ! empty( $content_type[1] ) ) {
93					$charset = explode( '=', $content_type[1] );
94					$charset = ( ! empty( $charset[1] ) ) ? trim( $charset[1] ) : '';
95				}
96				$content_type = $content_type[0];
97			}
98			if ( preg_match( '/Content-Transfer-Encoding: /i', $line ) ) {
99				$content_transfer_encoding = trim( $line );
100				$content_transfer_encoding = substr( $content_transfer_encoding, 27, strlen( $content_transfer_encoding ) - 27 );
101				$content_transfer_encoding = explode( ';', $content_transfer_encoding );
102				$content_transfer_encoding = $content_transfer_encoding[0];
103			}
104			if ( ( 'multipart/alternative' === $content_type ) && ( false !== strpos( $line, 'boundary="' ) ) && ( '' === $boundary ) ) {
105				$boundary = trim( $line );
106				$boundary = explode( '"', $boundary );
107				$boundary = $boundary[1];
108			}
109			if ( preg_match( '/Subject: /i', $line ) ) {
110				$subject = trim( $line );
111				$subject = substr( $subject, 9, strlen( $subject ) - 9 );
112				// Captures any text in the subject before $phone_delim as the subject.
113				if ( function_exists( 'iconv_mime_decode' ) ) {
114					$subject = iconv_mime_decode( $subject, 2, get_option( 'blog_charset' ) );
115				} else {
116					$subject = wp_iso_descrambler( $subject );
117				}
118				$subject = explode( $phone_delim, $subject );
119				$subject = $subject[0];
120			}
121
122			/*
123			 * Set the author using the email address (From or Reply-To, the last used)
124			 * otherwise use the site admin.
125			 */
126			if ( ! $author_found && preg_match( '/^(From|Reply-To): /', $line ) ) {
127				if ( preg_match( '|[a-z0-9_.-]+@[a-z0-9_.-]+(?!.*<)|i', $line, $matches ) ) {
128					$author = $matches[0];
129				} else {
130					$author = trim( $line );
131				}
132				$author = sanitize_email( $author );
133				if ( is_email( $author ) ) {
134					/* translators: %s: Post author email address. */
135					echo '<p>' . sprintf( __( 'Author is %s' ), $author ) . '</p>';
136					$userdata = get_user_by( 'email', $author );
137					if ( ! empty( $userdata ) ) {
138						$post_author  = $userdata->ID;
139						$author_found = true;
140					}
141				}
142			}
143
144			if ( preg_match( '/Date: /i', $line ) ) { // Of the form '20 Mar 2002 20:32:37 +0100'.
145				$ddate = str_replace( 'Date: ', '', trim( $line ) );
146				// Remove parenthesised timezone string if it exists, as this confuses strtotime().
147				$ddate           = preg_replace( '!\s*\(.+\)\s*$!', '', $ddate );
148				$ddate_timestamp = strtotime( $ddate );
149				$post_date       = gmdate( 'Y-m-d H:i:s', $ddate_timestamp + $time_difference );
150				$post_date_gmt   = gmdate( 'Y-m-d H:i:s', $ddate_timestamp );
151			}
152		}
153	}
154
155	// Set $post_status based on $author_found and on author's publish_posts capability.
156	if ( $author_found ) {
157		$user        = new WP_User( $post_author );
158		$post_status = ( $user->has_cap( 'publish_posts' ) ) ? 'publish' : 'pending';
159	} else {
160		// Author not found in DB, set status to pending. Author already set to admin.
161		$post_status = 'pending';
162	}
163
164	$subject = trim( $subject );
165
166	if ( 'multipart/alternative' === $content_type ) {
167		$content = explode( '--' . $boundary, $content );
168		$content = $content[2];
169
170		// Match case-insensitive content-transfer-encoding.
171		if ( preg_match( '/Content-Transfer-Encoding: quoted-printable/i', $content, $delim ) ) {
172			$content = explode( $delim[0], $content );
173			$content = $content[1];
174		}
175		$content = strip_tags( $content, '<img><p><br><i><b><u><em><strong><strike><font><span><div>' );
176	}
177	$content = trim( $content );
178
179	/**
180	 * Filters the original content of the email.
181	 *
182	 * Give Post-By-Email extending plugins full access to the content, either
183	 * the raw content, or the content of the last quoted-printable section.
184	 *
185	 * @since 2.8.0
186	 *
187	 * @param string $content The original email content.
188	 */
189	$content = apply_filters( 'wp_mail_original_content', $content );
190
191	if ( false !== stripos( $content_transfer_encoding, 'quoted-printable' ) ) {
192		$content = quoted_printable_decode( $content );
193	}
194
195	if ( function_exists( 'iconv' ) && ! empty( $charset ) ) {
196		$content = iconv( $charset, get_option( 'blog_charset' ), $content );
197	}
198
199	// Captures any text in the body after $phone_delim as the body.
200	$content = explode( $phone_delim, $content );
201	$content = empty( $content[1] ) ? $content[0] : $content[1];
202
203	$content = trim( $content );
204
205	/**
206	 * Filters the content of the post submitted by email before saving.
207	 *
208	 * @since 1.2.0
209	 *
210	 * @param string $content The email content.
211	 */
212	$post_content = apply_filters( 'phone_content', $content );
213
214	$post_title = xmlrpc_getposttitle( $content );
215
216	if ( '' === trim( $post_title ) ) {
217		$post_title = $subject;
218	}
219
220	$post_category = array( get_option( 'default_email_category' ) );
221
222	$post_data = compact( 'post_content', 'post_title', 'post_date', 'post_date_gmt', 'post_author', 'post_category', 'post_status' );
223	$post_data = wp_slash( $post_data );
224
225	$post_ID = wp_insert_post( $post_data );
226	if ( is_wp_error( $post_ID ) ) {
227		echo "\n" . $post_ID->get_error_message();
228	}
229
230	// We couldn't post, for whatever reason. Better move forward to the next email.
231	if ( empty( $post_ID ) ) {
232		continue;
233	}
234
235	/**
236	 * Fires after a post submitted by email is published.
237	 *
238	 * @since 1.2.0
239	 *
240	 * @param int $post_ID The post ID.
241	 */
242	do_action( 'publish_phone', $post_ID );
243
244	echo "\n<p><strong>" . __( 'Author:' ) . '</strong> ' . esc_html( $post_author ) . '</p>';
245	echo "\n<p><strong>" . __( 'Posted title:' ) . '</strong> ' . esc_html( $post_title ) . '</p>';
246
247	if ( ! $pop3->delete( $i ) ) {
248		echo '<p>' . sprintf(
249			/* translators: %s: POP3 error. */
250			__( 'Oops: %s' ),
251			esc_html( $pop3->ERROR )
252		) . '</p>';
253		$pop3->reset();
254		exit;
255	} else {
256		echo '<p>' . sprintf(
257			/* translators: %s: The message ID. */
258			__( 'Mission complete. Message %s deleted.' ),
259			'<strong>' . $i . '</strong>'
260		) . '</p>';
261	}
262}
263
264$pop3->quit();
265