572 lines
20 KiB
PHP
572 lines
20 KiB
PHP
<?php
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class S2_Frontend extends S2_Core {
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/**
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* Load all our strings
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*/
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public function load_strings() {
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// Translators: Link to login page
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$this->please_log_in = '<p class="s2_message">' . sprintf( __( 'To manage your subscription options please <a href="%1$s">login</a>.', 'subscribe2' ), get_option( 'siteurl' ) . '/wp-login.php' ) . '</p>';
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$profile = apply_filters( 's2_profile_link', get_option( 'siteurl' ) . '/wp-admin/admin.php?page=s2' );
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// Translators: Link to Profile page
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$this->profile = '<p class="s2_message">' . sprintf( __( 'You may manage your subscription options from your <a href="%1$s">profile</a>.', 'subscribe2' ), $profile ) . '</p>';
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if ( true === $this->s2_mu ) {
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global $blog_id;
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$user_ID = get_current_user_id();
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if ( ! is_user_member_of_blog( $user_ID, $blog_id ) ) {
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// if we are on multisite and the user is not a member of this blog change the link
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$mu_profile = apply_filters( 's2_mu_profile_link', get_option( 'siteurl' ) . '/wp-admin/?s2mu_subscribe=' . $blog_id );
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// Translators: Link to Profile page
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$this->profile = '<p class="s2_message">' . sprintf( __( '<a href="%1$s">Subscribe</a> to email notifications when this blog posts new content.', 'subscribe2' ), $mu_profile ) . '</p>';
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}
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}
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$this->confirmation_sent = '<p class="s2_message">' . __( 'A confirmation message is on its way!', 'subscribe2' ) . '</p>';
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$this->already_subscribed = '<p class="s2_error">' . __( 'That email address is already subscribed.', 'subscribe2' ) . '</p>';
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$this->not_subscribed = '<p class="s2_error">' . __( 'That email address is not subscribed.', 'subscribe2' ) . '</p>';
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$this->not_an_email = '<p class="s2_error">' . __( 'Sorry, but that does not look like an email address to me.', 'subscribe2' ) . '</p>';
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$this->barred_domain = '<p class="s2_error">' . __( 'Sorry, email addresses at that domain are currently barred due to spam, please use an alternative email address.', 'subscribe2' ) . '</p>';
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$this->error = '<p class="s2_error">' . __( 'Sorry, there seems to be an error on the server. Please try again later.', 'subscribe2' ) . '</p>';
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// confirmation messages
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$this->no_such_email = '<p class="s2_error">' . __( 'No such email address is registered.', 'subscribe2' ) . '</p>';
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$this->added = '<p class="s2_message">' . __( 'You have successfully subscribed!', 'subscribe2' ) . '</p>';
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$this->deleted = '<p class="s2_message">' . __( 'You have successfully unsubscribed.', 'subscribe2' ) . '</p>';
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$this->subscribe = __( 'subscribe', 'subscribe2' ); //ACTION replacement in subscribing confirmation email
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$this->unsubscribe = __( 'unsubscribe', 'subscribe2' ); //ACTION replacement in unsubscribing in confirmation email
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if ( isset( $_GET['s2_unsub'] ) && ! empty( $_GET['s2_unsub'] ) ) {
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$this->unsubscribe( $_GET['s2_unsub'] );
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}
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}
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/**
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* Process unsubscribe
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*
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* @param $email
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*/
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public function unsubscribe( $email ) {
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global $wpdb;
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$email = base64_decode( $email );
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if (! filter_var( $email, FILTER_VALIDATE_EMAIL ) ) {
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return;
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}
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$count = $wpdb->delete( $wpdb->subscribe2,
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[
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'email' => $email
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]
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);
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if ( ! $count ) {
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wp_safe_redirect( home_url() );
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}
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}
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/* ===== template and filter functions ===== */
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/**
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* Display our form; also handles (un)subscribe requests
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*/
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public function shortcode( $atts ) {
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$args = shortcode_atts(
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array(
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'hide' => '',
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'id' => '',
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'nojs' => 'false',
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'noantispam' => 'false',
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'link' => '',
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'size' => 20,
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'wrap' => 'true',
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'widget' => 'false',
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),
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$atts
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);
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// if link is true return a link to the page with the ajax class
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if ( '1' === $this->subscribe2_options['ajax'] && '' !== $args['link'] && ! is_user_logged_in() ) {
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$id = '';
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foreach ( $args as $arg_name => $arg_value ) {
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if ( ! empty( $arg_value ) && 'link' !== $arg_name && 'id' !== $arg_name ) {
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if ( 'nojs' === $arg_name ) {
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$arg_value = 'true';
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}
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( '' === $id ) ? $id .= $arg_name . '-' . $arg_value : $id .= ':' . $arg_name . '-' . $arg_value;
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}
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}
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$this->s2form = '<a href="#" class="s2popup" id="' . esc_attr( $id ) . '">' . esc_html( $args['link'] ) . '</a>' . "\r\n";
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return $this->s2form;
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}
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// Apply filters to button text
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$unsubscribe_button_value = apply_filters( 's2_unsubscribe_button', __( 'Unsubscribe', 'subscribe2' ) );
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$subscribe_button_value = apply_filters( 's2_subscribe_button', __( 'Subscribe', 'subscribe2' ) );
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// if a button is hidden, show only other
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$hide = strtolower( $args['hide'] );
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if ( 'subscribe' === $hide ) {
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$this->input_form_action = '<input type="submit" name="unsubscribe" value="' . esc_attr( $unsubscribe_button_value ) . '" />';
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} elseif ( 'unsubscribe' === $hide ) {
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$this->input_form_action = '<input type="submit" name="subscribe" value="' . esc_attr( $subscribe_button_value ) . '" />';
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} else {
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// both form input actions
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$this->input_form_action = '<input type="submit" name="subscribe" value="' . esc_attr( $subscribe_button_value ) . '" /> <input type="submit" name="unsubscribe" value="' . esc_attr( $unsubscribe_button_value ) . '" />';
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}
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// if ID is provided, get permalink
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$action = '';
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if ( is_numeric( $args['id'] ) ) {
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$action = ' action="' . get_permalink( $args['id'] ) . '"';
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} elseif ( 'home' === $args['id'] ) {
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$action = ' action="' . get_site_url() . '"';
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} elseif ( 'self' === $args['id'] ) {
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// Correct for Static front page redirect behaviour
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if ( 'page' === get_option( 'show_on_front' ) && is_front_page() ) {
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$post = get_post( get_option( 'page_on_front' ) );
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$action = ' action="' . get_option( 'home' ) . '/' . $post->post_name . '/"';
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} else {
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$action = '';
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}
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} elseif ( $this->subscribe2_options['s2page'] > 0 ) {
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$action = ' action="' . get_permalink( $this->subscribe2_options['s2page'] ) . '"';
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}
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// allow remote setting of email in form
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if ( isset( $_REQUEST['email'] ) ) {
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$email = $this->sanitize_email( $_REQUEST['email'] );
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}
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if ( isset( $_REQUEST['email'] ) && false !== $this->validate_email( $email ) ) {
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$value = $email;
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} elseif ( 'true' === strtolower( $args['nojs'] ) ) {
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$value = '';
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} else {
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$value = __( 'Enter email address...', 'subscribe2' );
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}
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// if wrap is true add paragraph html tags
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$wrap_text = '';
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if ( 'true' === strtolower( $args['wrap'] ) ) {
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$wrap_text = '</p><p>';
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}
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// deploy some anti-spam measures
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$antispam_text = '';
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if ( 'true' !== strtolower( $args['noantispam'] ) ) {
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$antispam_text = '<span style="display:none !important">';
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$antispam_text .= '<label for="firstname">Leave This Blank:</label><input type="text" id="firstname" name="firstname" />';
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$antispam_text .= '<label for="lastname">Leave This Blank Too:</label><input type="text" id="lastname" name="lastname" />';
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$antispam_text .= '<label for="uri">Do Not Change This:</label><input type="text" id="uri" name="uri" value="http://" />';
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$antispam_text .= '</span>';
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}
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// get remote IP address
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$remote_ip = $this->get_remote_ip();
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// form name
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if ( 'true' === $args['widget'] ) {
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$form_name = 's2formwidget';
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} else {
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$form_name = 's2form';
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}
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// build default form
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if ( 'true' === strtolower( $args['nojs'] ) ) {
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$this->form = '<form name="' . $form_name . '" method="post"' . $action . '><input type="hidden" name="ip" value="' . esc_attr( $_SERVER['REMOTE_ADDR'] ) . '" />' . $antispam_text . '<p><label for="s2email">' . __( 'Your email:', 'subscribe2' ) . '</label><br><input type="email" name="email" id="s2email" value="' . $value . '" size="' . $args['size'] . '" />' . $wrap_text . $this->input_form_action . '</p></form>';
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} else {
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$this->form = '<form name="' . $form_name . '" method="post"' . $action . '><input type="hidden" name="ip" value="' . esc_attr( $_SERVER['REMOTE_ADDR'] ) . '" />' . $antispam_text . '<p><label for="s2email">' . __( 'Your email:', 'subscribe2' ) . '</label><br><input type="email" name="email" id="s2email" value="' . $value . '" size="' . $args['size'] . '" onfocus="if (this.value === \'' . $value . '\') {this.value = \'\';}" onblur="if (this.value === \'\') {this.value = \'' . $value . '\';}" />' . $wrap_text . $this->input_form_action . '</p></form>' . "\r\n";
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}
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$this->s2form = apply_filters( 's2_form', $this->form, $args );
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global $user_ID;
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if ( 0 !== $user_ID ) {
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return $this->profile;
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}
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if ( isset( $_POST['subscribe'] ) || isset( $_POST['unsubscribe'] ) ) {
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// anti spam sign up measure
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if ( ( isset( $_POST['firstname'] ) && '' !== $_POST['firstname'] ) || ( isset( $_POST['lastname'] ) && '' !== $_POST['lastname'] ) || ( isset( $_POST['uri'] ) && 'http://' !== $_POST['uri'] ) ) {
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// looks like some invisible-to-user fields were changed; falsely report success
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return $this->confirmation_sent;
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}
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$validation = apply_filters( 's2_form_submission', true );
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if ( true !== $validation ) {
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return apply_filters( 's2_form_failed_validation', $this->s2form );
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}
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global $wpdb;
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$this->email = $this->sanitize_email( $_POST['email'] );
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if ( false === $this->validate_email( $this->email ) ) {
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$this->s2form = $this->s2form . $this->not_an_email;
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} elseif ( $this->is_barred( $this->email ) ) {
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$this->s2form = $this->s2form . $this->barred_domain;
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} else {
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$this->ip = $_POST['ip'];
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if ( is_int( $this->lockout ) && $this->lockout > 0 ) {
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$date = gmdate( 'H:i:s.u', $this->lockout );
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$ips = $wpdb->get_col( $wpdb->prepare( "SELECT ip FROM $wpdb->subscribe2 WHERE date = CURDATE() AND time > SUBTIME(CURTIME(), %s)", $date ) );
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if ( in_array( $this->ip, $ips, true ) ) {
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return __( 'Slow down, you move too fast.', 'subscribe2' );
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}
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}
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// does the supplied email belong to a registered user?
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$check = $wpdb->get_var( $wpdb->prepare( "SELECT user_email FROM $wpdb->users WHERE user_email = %s", $this->email ) );
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if ( null !== $check ) {
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// this is a registered email
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$this->s2form = $this->please_log_in;
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} else {
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// this is not a registered email
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// what should we do?
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if ( isset( $_POST['subscribe'] ) ) {
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// someone is trying to subscribe
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// lets see if they've tried to subscribe previously
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if ( '1' !== $this->is_public( $this->email ) ) {
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// the user is unknown or inactive
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$this->add( $this->email );
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$status = $this->send_confirm( 'add' );
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// set a variable to denote that we've already run, and shouldn't run again
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$this->filtered = 1;
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if ( $status ) {
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$this->s2form = $this->confirmation_sent;
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} else {
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$this->s2form = $this->error;
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}
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} else {
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// they're already subscribed
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$this->s2form = $this->already_subscribed;
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}
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$this->action = 'subscribe';
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} elseif ( isset( $_POST['unsubscribe'] ) ) {
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// is this email a subscriber?
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if ( false === $this->is_public( $this->email ) ) {
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$this->s2form = $this->s2form . $this->not_subscribed;
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} else {
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$status = $this->send_confirm( 'del' );
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// set a variable to denote that we've already run, and shouldn't run again
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$this->filtered = 1;
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if ( $status ) {
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$this->s2form = $this->confirmation_sent;
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} else {
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$this->s2form = $this->error;
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}
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}
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$this->action = 'unsubscribe';
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}
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}
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}
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}
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return $this->s2form;
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}
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/**
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* Display form when deprecated <!--subscribe2--> is used
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*/
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public function filter( $content = '' ) {
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if ( '' === $content || ! strstr( $content, '<!--subscribe2-->' ) ) {
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return $content;
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}
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return preg_replace( '/(<p>)?(\n)*<!--subscribe2-->(\n)*(<\/p>)?/', do_shortcode( '[subscribe2]' ), $content );
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}
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/**
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* Overrides the default query when handling a (un)subscription confirmation
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* This is basically a trick: if the s2 variable is in the query string, just grab the first
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* static page and override it's contents later with title_filter()
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*/
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public function query_filter() {
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// don't interfere if we've already done our thing
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if ( 1 === $this->filtered ) {
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return;
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}
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global $wpdb;
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// brute force Simple Facebook Connect to bypass compatiblity issues
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$priority = has_filter( 'wp_head', 'sfc_base_meta' );
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if ( false !== $priority ) {
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remove_action( 'wp_head', 'sfc_base_meta', $priority );
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}
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if ( 0 !== $this->subscribe2_options['s2page'] ) {
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return array(
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'page_id' => $this->subscribe2_options['s2page'],
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);
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} else {
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$id = $wpdb->get_var( "SELECT ID FROM $wpdb->posts WHERE post_type='page' AND post_status='publish' LIMIT 1" );
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if ( $id ) {
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return array(
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'page_id' => $id,
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);
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} else {
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return array(
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'showposts' => 1,
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);
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}
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}
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}
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/**
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* Overrides the page title
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*/
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public function title_filter( $title ) {
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if ( in_the_loop() ) {
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$code = $_GET['s2'];
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$action = intval( substr( $code, 0, 1 ) );
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if ( 1 === $action ) {
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return __( 'Subscription Confirmation', 'subscribe2' );
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} else {
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return __( 'Unsubscription Confirmation', 'subscribe2' );
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}
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} else {
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return $title;
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}
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}
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/**
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* Confirm request from the link emailed to the user and email the admin
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*/
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public function confirm( $content = '' ) {
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global $wpdb;
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if ( 1 === $this->filtered && '' !== $this->message ) {
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return $this->message;
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} elseif ( 1 === $this->filtered ) {
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return $content;
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}
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$code = $_GET['s2'];
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$action = substr( $code, 0, 1 );
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$hash = substr( $code, 1, 32 );
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$id = intval( substr( $code, 33 ) );
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if ( $id ) {
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$this->email = $this->sanitize_email( $this->get_email( $id ) );
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if ( ! $this->email || wp_hash( $this->email ) !== $hash ) {
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return $this->no_such_email;
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}
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} else {
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return $this->no_such_email;
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}
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// get current status of email so messages are only sent once per emailed link
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$current = $this->is_public( $this->email );
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if ( '1' === $action ) {
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// make this subscription active
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$this->message = apply_filters( 's2_subscribe_confirmed', $this->added );
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if ( '1' !== $this->is_public( $this->email ) ) {
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$this->ip = esc_html( $this->get_remote_ip() );
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$this->toggle( $this->email );
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if ( 'subs' === $this->subscribe2_options['admin_email'] || 'both' === $this->subscribe2_options['admin_email'] ) {
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$this->admin_email( 'subscribe' );
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}
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}
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$this->filtered = 1;
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} elseif ( '0' === $action ) {
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// remove this public subscriber
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$this->message = apply_filters( 's2_unsubscribe_confirmed', $this->deleted );
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if ( '0' !== $this->is_public( $this->email ) ) {
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$this->delete( $this->email );
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if ( 'unsubs' === $this->subscribe2_options['admin_email'] || 'both' === $this->subscribe2_options['admin_email'] ) {
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$this->admin_email( 'unsubscribe' );
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}
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}
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$this->filtered = 1;
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}
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if ( '' !== $this->message ) {
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return $this->message;
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}
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}
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/**
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* Prepare and send emails to admins on new subscriptions and unsubsriptions
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*/
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public function admin_email( $action ) {
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if ( ! in_array( $action, array( 'subscribe', 'unsubscribe' ), true ) ) {
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return false;
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}
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( '' === get_option( 'blogname' ) ) ? $subject = '' : $subject = '[' . stripslashes( html_entity_decode( get_option( 'blogname' ), ENT_QUOTES ) ) . '] ';
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if ( 'subscribe' === $action ) {
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$subject .= __( 'New Subscription', 'subscribe2' );
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$message = $this->email . ' ' . __( 'subscribed to email notifications!', 'subscribe2' );
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} elseif ( 'unsubscribe' === $action ) {
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$subject .= __( 'New Unsubscription', 'subscribe2' );
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$message = $this->email . ' ' . __( 'unsubscribed from email notifications!', 'subscribe2' );
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}
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$subject = html_entity_decode( $subject, ENT_QUOTES );
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$role = array(
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'fields' => array(
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'user_email',
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),
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'role' => 'administrator',
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);
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$wp_user_query = get_users( $role );
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foreach ( $wp_user_query as $user ) {
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$recipients[] = $user->user_email;
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}
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$recipients = apply_filters( 's2_admin_email', $recipients, $action );
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$headers = $this->headers();
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// send individual emails so we don't reveal admin emails to each other
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foreach ( $recipients as $recipient ) {
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$status = wp_mail( $recipient, $subject, $message, $headers );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Add hook for Minimeta Widget plugin
|
|
*/
|
|
public function add_minimeta() {
|
|
if ( 0 !== $this->subscribe2_options['s2page'] ) {
|
|
echo '<li><a href="' . esc_url( get_permalink( $this->subscribe2_options['s2page'] ) ) . '">' . esc_html__( '[Un]Subscribe to Posts', 'subscribe2' ) . '</a></li>' . "\r\n";
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Check email is not from a barred domain
|
|
*/
|
|
public function is_barred( $email = '' ) {
|
|
if ( '' === $email ) {
|
|
return false;
|
|
}
|
|
|
|
list( $user, $domain ) = explode( '@', $email, 2 );
|
|
|
|
$domain = '@' . $domain;
|
|
|
|
foreach ( preg_split( '/[\s,]+/', $this->subscribe2_options['barred'] ) as $barred_domain ) {
|
|
if ( false !== strpos( $barred_domain, '!' ) ) {
|
|
$url = explode( '.', str_replace( '!', '', $barred_domain ) );
|
|
$count = count( $url );
|
|
// make sure our exploded domain has at least 2 components e.g. yahoo.*
|
|
if ( $count < 2 ) {
|
|
continue;
|
|
}
|
|
for ( $i = 0; $i < $count; $i++ ) {
|
|
if ( '*' === $url[ $i ] ) {
|
|
unset( $url[ $i ] );
|
|
}
|
|
}
|
|
|
|
$new_barred_domain = '@' . strtolower( trim( implode( '.', $url ) ) );
|
|
|
|
if ( false !== strpos( $barred_domain, '*' ) ) {
|
|
$new_barred_subdomain = '.' . strtolower( trim( implode( '.', $url ) ) );
|
|
if ( false !== stripos( $domain, $new_barred_domain ) || false !== stripos( $domain, $new_barred_subdomain ) ) {
|
|
return false;
|
|
}
|
|
} else {
|
|
if ( false !== stripos( $domain, $new_barred_domain ) ) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ( false === strpos( $barred_domain, '!' ) && false !== strpos( $barred_domain, '*' ) ) {
|
|
// wildcard and explictly allowed checking
|
|
$url = explode( '.', str_replace( '!', '', $barred_domain ) );
|
|
$count = count( $url );
|
|
// make sure our exploded domain has at least 2 components e.g. yahoo.*
|
|
if ( $count < 2 ) {
|
|
continue;
|
|
}
|
|
for ( $i = 0; $i < $count; $i++ ) {
|
|
if ( '*' === $url[ $i ] ) {
|
|
unset( $url[ $i ] );
|
|
}
|
|
}
|
|
|
|
$new_barred_domain = '@' . strtolower( trim( implode( '.', $url ) ) );
|
|
$new_barred_subdomain = '.' . strtolower( trim( implode( '.', $url ) ) );
|
|
|
|
if ( false !== stripos( $domain, $new_barred_domain ) || false !== stripos( $domain, $new_barred_subdomain ) ) {
|
|
return true;
|
|
}
|
|
} else {
|
|
// direct domain string comparison
|
|
$barred_domain = '@' . $barred_domain;
|
|
if ( strtolower( $domain ) === strtolower( trim( $barred_domain ) ) ) {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Collect and return the IP address of the remote client machine
|
|
*/
|
|
public function get_remote_ip() {
|
|
$remote_ip = false;
|
|
|
|
// In order of preference, with the best ones for this purpose first
|
|
$address_headers = array(
|
|
'HTTP_CLIENT_IP',
|
|
'HTTP_X_FORWARDED_FOR',
|
|
'HTTP_X_FORWARDED',
|
|
'HTTP_X_CLUSTER_CLIENT_IP',
|
|
'HTTP_FORWARDED_FOR',
|
|
'HTTP_FORWARDED',
|
|
'REMOTE_ADDR',
|
|
);
|
|
|
|
foreach ( $address_headers as $header ) {
|
|
if ( array_key_exists( $header, $_SERVER ) ) {
|
|
// HTTP_X_FORWARDED_FOR can contain a chain of comma-separated
|
|
// addresses. The first one is the original client. It can't be
|
|
// trusted for authenticity, but we don't need to for this purpose.
|
|
$address_chain = explode( ',', $_SERVER[ $header ] );
|
|
$remote_ip = trim( $address_chain[0] );
|
|
break;
|
|
}
|
|
}
|
|
|
|
return $remote_ip;
|
|
}
|
|
|
|
/**
|
|
* Enqueue javascript ip updater code
|
|
*/
|
|
public function js_ip_script() {
|
|
wp_register_script( 's2_ip_updater', S2URL . 'include/s2-ip-updater' . $this->script_debug . '.js', array(), '1.1', true );
|
|
wp_enqueue_script( 's2_ip_updater' );
|
|
}
|
|
|
|
/**
|
|
* Add ip updater library to footer
|
|
*/
|
|
public function js_ip_library_script() {
|
|
$args = array(
|
|
'format' => 'jsonp',
|
|
'callback' => 'getip',
|
|
);
|
|
wp_enqueue_script( 's2_ip_library', add_query_arg( $args, 'https://api.ipify.org' ), array(), S2VERSION, true );
|
|
}
|
|
|
|
/**
|
|
* Reformat WordPress escaped link to IPify library
|
|
*/
|
|
public function tag_replace_ampersand( $tag ) {
|
|
if ( strstr( $tag, 'ipify' ) !== false ) {
|
|
$tag = str_replace( '&', '&', $tag );
|
|
}
|
|
|
|
return $tag;
|
|
}
|
|
|
|
/* ===== define some variables ===== */
|
|
public $profile = '';
|
|
}
|