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<title>[105] sites/trunk/wordcamp.org/public_html/wp-content/plugins: EPC Specific Post: Initial commit</title>
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<dl class="meta">
<dt>Revision</dt> <dd><a href="http://meta.trac.wordpress.org/changeset/105">105</a></dd>
<dt>Author</dt> <dd>iandunn</dd>
<dt>Date</dt> <dd>2013-10-18 21:21:54 +0000 (Fri, 18 Oct 2013)</dd>
</dl>
<h3>Log Message</h3>
<pre>EPC Specific Post: Initial commit</pre>
<h3>Added Paths</h3>
<ul>
<li>sites/trunk/wordcamp.org/public_html/wp-content/plugins/email-post-changes-specific-post/</li>
<li><a href="#sitestrunkwordcamporgpublic_htmlwpcontentpluginsemailpostchangesspecificpostemailpostchangesspecificpostphp">sites/trunk/wordcamp.org/public_html/wp-content/plugins/email-post-changes-specific-post/email-post-changes-specific-post.php</a></li>
<li><a href="#sitestrunkwordcamporgpublic_htmlwpcontentpluginsemailpostchangesspecificpostwidgetsubscribephp">sites/trunk/wordcamp.org/public_html/wp-content/plugins/email-post-changes-specific-post/widget-subscribe.php</a></li>
</ul>
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<h3>Diff</h3>
<a id="sitestrunkwordcamporgpublic_htmlwpcontentpluginsemailpostchangesspecificpostemailpostchangesspecificpostphp"></a>
<div class="addfile"><h4>Added: sites/trunk/wordcamp.org/public_html/wp-content/plugins/email-post-changes-specific-post/email-post-changes-specific-post.php (0 => 105)</h4>
<pre class="diff"><span>
<span class="info">--- sites/trunk/wordcamp.org/public_html/wp-content/plugins/email-post-changes-specific-post/email-post-changes-specific-post.php (rev 0)
+++ sites/trunk/wordcamp.org/public_html/wp-content/plugins/email-post-changes-specific-post/email-post-changes-specific-post.php 2013-10-18 21:21:54 UTC (rev 105)
</span><span class="lines">@@ -0,0 +1,49 @@
</span><ins>+<?php
+
+/*
+Plugin Name: Email Post Changes - Subscribe to Specific Post
+Description: Extends the Email Post Changes plugin to allow visitors to subscribe to a specific post/page
+Version: 0.1
+Author: Ian Dunn
+*/
+
+class EPCSpecificPost {
+
+ /**
+ * Constructor
+ */
+ public function __construct() {
+ add_action( 'widgets_init', array( $this, 'register_widgets' ) );
+ add_filter( 'email_post_changes_emails', array( $this, 'insert_subscribed_emails' ), 10, 3 );
+ }
+
+ /**
+ * Register widgets
+ */
+ public function register_widgets() {
+ register_widget( 'EPCSP_SubscribeWidget' );
+ }
+
+ /**
+ * Inserts extra email addresses into the list of recipients
+ * When EPC is crafting a new notification, this method adds all of the addresses we've collected to it
+ *
+ * @param array $emails The list of addresses that EPC has collected
+ * @param int $old_post_id
+ * @param int $new_post_id
+ * @return array
+ */
+ public function insert_subscribed_emails( $emails, $old_post_id, $new_post_id ) {
+ $subscribed_emails = get_option( 'epcsp_subscribed_addresses', array() );
+
+ if ( isset( $subscribed_emails[ $old_post_id ] ) && is_array( $subscribed_emails[ $old_post_id ] ) ) {
+ $emails = array_merge( $emails, $subscribed_emails[ $old_post_id ] );
+ $emails = array_unique( $emails );
+ }
+
+ return $emails;
+ }
+}
+
+require_once( __DIR__ . '/widget-subscribe.php' );
+$GLOBALS['EPCSpecificPost'] = new EPCSpecificPost();
</ins><span class="cx">\ No newline at end of file
</span></span></pre></div>
<a id="sitestrunkwordcamporgpublic_htmlwpcontentpluginsemailpostchangesspecificpostwidgetsubscribephp"></a>
<div class="addfile"><h4>Added: sites/trunk/wordcamp.org/public_html/wp-content/plugins/email-post-changes-specific-post/widget-subscribe.php (0 => 105)</h4>
<pre class="diff"><span>
<span class="info">--- sites/trunk/wordcamp.org/public_html/wp-content/plugins/email-post-changes-specific-post/widget-subscribe.php (rev 0)
+++ sites/trunk/wordcamp.org/public_html/wp-content/plugins/email-post-changes-specific-post/widget-subscribe.php 2013-10-18 21:21:54 UTC (rev 105)
</span><span class="lines">@@ -0,0 +1,210 @@
</span><ins>+<?php
+
+/**
+ * A widget that allows visitors to subscribe to the current post/page
+ * A form is presented to the visitor to enter their email address, and then their address is mapped to the current post ID and saved in the database
+ *
+ * @package EPCSpecificPost
+ */
+class EPCSP_SubscribeWidget extends WP_Widget {
+
+ /**
+ * Constructor
+ */
+ function __construct() {
+ $widget_options = array(
+ 'classname' => 'epcsp_subscribe',
+ 'description' => __( 'Allow visitors to subscribe to email notifications for a specific post or page' )
+ );
+ $control_options = array( 'width' => 300 );
+
+ parent::__construct( 'epcsp_subscribe', __( 'Subscribe to Specific Post' ), $widget_options, $control_options );
+
+ add_action( 'wp_head', array( $this, 'output_css' ) );
+ }
+
+ /**
+ * Displays and processes the front-end form that visitors will enter their email address into in order to subscribe to the current post
+ *
+ * @param array $args
+ * @param array $instance
+ */
+ function widget( $args, $instance ) {
+ $errors = array();
+ $message = '';
+ $title = apply_filters( 'epcsp_subscribe_title', empty( $instance['title'] ) ? '' : $instance['title'], $instance, $this->id_base );
+
+ if ( ! $this->is_supported_epc_post_type( get_post_type() ) ) {
+ return;
+ }
+
+ if ( isset( $_POST['epcsp_subscribe_submit'] ) ) {
+ $errors = $this->subscribe_visitor_to_post( $_POST['epcsp_subscribe_address'], get_the_ID() );
+
+ if ( $errors ) {
+ foreach ( $errors as $error ) {
+ $message .= '<p>' . $error . '</p>';
+ }
+ } else {
+ $message = 'You have been subscribed to this post.';
+ }
+ }
+
+ echo $args['before_widget'];
+
+ if ( ! empty( $title ) ) {
+ echo $args['before_title'] . $title . $args['after_title'];
+ }
+
+ echo $message;
+ if ( ! isset( $_POST['epcsp_subscribe_submit'] ) || $errors ) {
+ $this->render_subscription_form();
+ }
+
+ echo $args['after_widget'];
+ }
+
+ /**
+ * Determines if the given post type is enabled in EPC's settings
+ *
+ * @param string $post_type
+ * @return bool
+ */
+ function is_supported_epc_post_type( $post_type ) {
+ $supported = false;
+
+ if ( class_exists( 'Email_Post_Changes' ) ) {
+ $epc_options = Email_Post_Changes::init()->get_options();
+
+ if ( in_array( $post_type, $epc_options['post_types'] ) ) {
+ $supported = true;
+ }
+ }
+
+ return $supported;
+ }
+
+ /**
+ * Renders the form the visitor inputs their email address into
+ */
+ function render_subscription_form() {
+ ?>
+
+ <form id="epcsp_subscribe" name="epcsp_subscribe" action="" method="POST">
+ <label for="epcsp_subscribe_address">Email Address:</label>
+ <input id="epcsp_subscribe_address" name="epcsp_subscribe_address" type="text" />
+ <input name="epcsp_subscribe_submit" type="submit" value="Subscribe" />
+ </form>
+
+ <?php
+ }
+
+ /**
+ * Outputs the styles for the widget
+ */
+ function output_css() {
+ ?>
+
+ <style type="text/css">
+ #epcsp_subscribe label,
+ #epcsp_subscribe input {
+ display: block;
+ }
+
+ #epcsp_subscribe_address {
+ width: 100%;
+ max-width: 300px;
+ margin: 5px 0;
+ }
+ </style>
+
+ <?php
+ }
+
+ /**
+ * Subscribes the visitor to the post
+ *
+ * @param string $email
+ * @param int $post_id
+ * @return array
+ */
+ function subscribe_visitor_to_post( $email, $post_id ) {
+ $errors = array();
+ $post_id = absint( $post_id );
+
+ if ( is_email( $email ) ) {
+ $subscribed_addresses = get_option( 'epcsp_subscribed_addresses', array() );
+
+ if ( isset( $subscribed_addresses[ $post_id ] ) && in_array( $email, $subscribed_addresses[ $post_id ] ) ) {
+ $errors[] = 'You are already subscribed to this post.';
+ } else {
+ $subscribed_addresses[ $post_id ][] = sanitize_email( $email );
+ $subscribed_addresses[ $post_id ] = array_unique( $subscribed_addresses[ $post_id ] );
+
+ update_option( 'epcsp_subscribed_addresses', $subscribed_addresses );
+ }
+ } else {
+ $errors[] = 'The email address you entered was not valid.';
+ }
+
+ return $errors;
+ }
+
+ /**
+ * Processes the back-end form on the Widgets page
+ *
+ * @param array $new_instance
+ * @param array $old_instance
+ * @return array
+ */
+ function update( $new_instance, $old_instance ) {
+ $instance = $old_instance;
+ $instance['title'] = strip_tags( $new_instance['title'] );
+
+ return $instance;
+ }
+
+ /**
+ * Generates the back-end form for the Widgets page
+ *
+ * @param array $instance
+ */
+ function form( $instance ) {
+ $instance = wp_parse_args( (array) $instance, array( 'title' => '' ) );
+ $title = strip_tags( $instance['title'] );
+
+ ?>
+
+ <?php if ( ! $this->is_epc_enabled() ) : ?>
+ <div class="error inline">
+ <strong>Warning:</strong> The 'Enable' setting on <a href="<?php echo admin_url( 'options-general.php?page=email_post_changes' ); ?>">the Email Post Changes settings page</a> is disabled. No emails will be sent until it is enabled.
+ </div>
+ <?php endif; ?>
+
+ <p>
+ <label for="<?php echo $this->get_field_id( 'title' ); ?>"><?php _e( 'Title:' ); ?></label>
+ <input class="widefat" id="<?php echo $this->get_field_id( 'title' ); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" type="text" value="<?php echo esc_attr( $title ); ?>" />
+ </p>
+
+ <?php
+ }
+
+ /**
+ * Determines if the Email Post Changes plugin has the 'Enabled' setting turned on or not
+ *
+ * @return bool
+ */
+ function is_epc_enabled() {
+ $enabled = false;
+
+ if ( class_exists( 'Email_Post_Changes' ) ) {
+ $epc_options = Email_Post_Changes::init()->get_options();
+
+ if ( $epc_options['enable'] ) {
+ $enabled = true;
+ }
+ }
+
+ return $enabled;
+ }
+}
</ins><span class="cx">\ No newline at end of file
</span></span></pre>
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