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<title>[11562] sites/trunk/wordpress.org/public_html/wp-content/plugins/support-forums: Support Forums: 'unroll' forum subscription emails, sending an individual email per recipient rather than BCC'ing them all together.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="http://meta.trac.wordpress.org/changeset/11562">11562</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"http://meta.trac.wordpress.org/changeset/11562","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>dd32</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2022-02-16 05:04:32 +0000 (Wed, 16 Feb 2022)</dd>
</dl>

<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Support Forums: 'unroll' forum subscription emails, sending an individual email per recipient rather than BCC'ing them all together.

See <a href="http://meta.trac.wordpress.org/ticket/5505">#5505</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#sitestrunkwordpressorgpublic_htmlwpcontentpluginssupportforumsincclasspluginphp">sites/trunk/wordpress.org/public_html/wp-content/plugins/support-forums/inc/class-plugin.php</a></li>
<li><a href="#sitestrunkwordpressorgpublic_htmlwpcontentpluginssupportforumsincclassstatsphp">sites/trunk/wordpress.org/public_html/wp-content/plugins/support-forums/inc/class-stats.php</a></li>
<li><a href="#sitestrunkwordpressorgpublic_htmlwpcontentpluginssupportforumssupportforumsphp">sites/trunk/wordpress.org/public_html/wp-content/plugins/support-forums/support-forums.php</a></li>
</ul>

<h3>Added Paths</h3>
<ul>
<li><a href="#sitestrunkwordpressorgpublic_htmlwpcontentpluginssupportforumsincclassemailsphp">sites/trunk/wordpress.org/public_html/wp-content/plugins/support-forums/inc/class-emails.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="sitestrunkwordpressorgpublic_htmlwpcontentpluginssupportforumsincclassemailsphp"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: sites/trunk/wordpress.org/public_html/wp-content/plugins/support-forums/inc/class-emails.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- sites/trunk/wordpress.org/public_html/wp-content/plugins/support-forums/inc/class-emails.php                              (rev 0)
+++ sites/trunk/wordpress.org/public_html/wp-content/plugins/support-forums/inc/class-emails.php        2022-02-16 05:04:32 UTC (rev 11562)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,109 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+<?php
+namespace WordPressdotorg\Forums;
+
+/**
+ * Support Forum Email modifications.
+ * 
+ * This filters outgoing bbPress emails to 'unroll' subscription emails from a set of BCC's to individual emails.
+ */
+class Emails {
+
+       public function __construct() {
+               // Forum subscribers. This is also for Term (Plugin/Theme/Tag) subscriptions new topics.
+               add_action( 'bbp_pre_notify_forum_subscribers',  [ $this, 'start_unroll' ] );
+               add_action( 'bbp_post_notify_forum_subscribers', [ $this, 'stop_unroll' ] );
+
+               // Topic subscribers. This is also for Term (Plugin/Theme/Tag) subscriptions new replies.
+               add_action( 'bbp_pre_notify_subscribers',  [ $this, 'start_unroll' ] );
+               add_action( 'bbp_post_notify_subscribers', [ $this, 'stop_unroll' ] );
+       }
+
+       /**
+        * Attached to the filter to start filtering outgoing emails on.
+        */
+       public function start_unroll() {
+               add_filter( 'pre_wp_mail', [ $this, 'pre_wp_mail_unroll' ], 1, 2 );
+       }
+
+       /**
+        * Attached to the filter to stop filtering outgoing emails on.
+        */
+       public function stop_unroll() {
+               remove_filter( 'pre_wp_mail', [ $this, 'pre_wp_mail_unroll' ], 1 );
+       }
+
+       /**
+        * Unroll wp_mail() BCC'd emails into individual emails.
+        */
+       public function pre_wp_mail_unroll( $filter_return, $attrs ) {
+               static $recursive = false;
+               // Short circuit if we're the one who called wp_mail().
+               if ( $recursive ) {
+                       return $filter_return;
+               }
+
+               $attrs = wp_parse_args(
+                       $attrs,
+                       [
+                               'to'          => [],
+                               'subject'     => '',
+                               'message'     => '',
+                               'headers'     => [],
+                               'attachments' => [],
+                       ]
+               );
+
+               if ( ! is_array( $attrs['headers'] ) ) {
+                       $attrs['headers'] = explode( "\n", str_replace( "\r\n", "\n", $attrs['headers'] ) );
+               }
+
+               // Pull out CC's and BCC's to a separate array.
+               foreach ( $attrs['headers'] as $i => $header ) {
+                       if ( ! str_contains( $header, ':' ) ) {
+                               return;
+                       }
+
+                       list( $name, $value ) = explode( ':', trim( $header ), 2 );
+                       $name                 = strtolower( trim( $name ) );
+       
+                       if ( 'cc' === $name || 'bcc' === $name ) {
+                               unset( $attrs['headers'][ $i ] );
+                               $dest_emails[] = trim( $value );
+                       }
+               }
+
+               $no_reply    = apply_filters( 'bbp_subscription_to_email', bbp_get_do_not_reply_address() );
+               $dest_emails = is_array( $attrs['to'] ) ? $attrs['to'] : explode( ',', $attrs['to'] );
+               // Remove the noreply email, it was probably set as the $to address.
+               $dest_emails = array_diff( $dest_emails, [ $no_reply ] );
+       
+               // This shouldn't happen, but if it does, let wp_mail() do it's thing instead.
+               // NOTE: We still process if there was only one to/cc/bcc address, to ensure the below custom filter gets run.
+               if ( empty( $dest_emails ) ) {
+                       return $filter_return;
+               }
+
+               // Prevent recursive calls.
+               $recursive = true;
+               foreach ( $dest_emails as $to ) {
+                       // The to is always the current recipient.
+                       $attrs['to'] = $to;
+
+                       // Filter for w.org plugins to personalize emails.
+                       $attrs = apply_filters( 'wporg_bbp_subscription_email', $attrs );
+       
+                       $filter_return = wp_mail(
+                               $attrs['to'],
+                               $attrs['subject'],
+                               $attrs['message'],
+                               $attrs['headers'],
+                               $attrs['attachments']
+                       );
+               }
+
+               $recursive = false;
+
+               // We've sent the emails, we return the last emails result here, even tho calling function probably won't look at it.
+               return $filter_return;
+       }
+}
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of file
</span><span class="cx" style="display: block; padding: 0 10px">Property changes on: sites/trunk/wordpress.org/public_html/wp-content/plugins/support-forums/inc/class-emails.php
</span><span class="cx" style="display: block; padding: 0 10px">___________________________________________________________________
</span></span></pre></div>
<a id="svneolstyle"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: svn:eol-style</h4></div>
<ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+native
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><a id="sitestrunkwordpressorgpublic_htmlwpcontentpluginssupportforumsincclasspluginphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: sites/trunk/wordpress.org/public_html/wp-content/plugins/support-forums/inc/class-plugin.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- sites/trunk/wordpress.org/public_html/wp-content/plugins/support-forums/inc/class-plugin.php      2022-02-15 22:30:42 UTC (rev 11561)
+++ sites/trunk/wordpress.org/public_html/wp-content/plugins/support-forums/inc/class-plugin.php        2022-02-16 05:04:32 UTC (rev 11562)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -44,6 +44,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $this->report_topic = new Report_Topic;
</span><span class="cx" style="display: block; padding: 0 10px">                $this->nsfw_handler = new NSFW_Handler;
</span><span class="cx" style="display: block; padding: 0 10px">                $this->stats        = new Stats;
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                $this->emails       = new Emails;
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                // These modifications are specific to https://wordpress.org/support/
</span><span class="cx" style="display: block; padding: 0 10px">                $blog_id = get_current_blog_id();
</span></span></pre></div>
<a id="sitestrunkwordpressorgpublic_htmlwpcontentpluginssupportforumsincclassstatsphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: sites/trunk/wordpress.org/public_html/wp-content/plugins/support-forums/inc/class-stats.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- sites/trunk/wordpress.org/public_html/wp-content/plugins/support-forums/inc/class-stats.php       2022-02-15 22:30:42 UTC (rev 11561)
+++ sites/trunk/wordpress.org/public_html/wp-content/plugins/support-forums/inc/class-stats.php 2022-02-16 05:04:32 UTC (rev 11562)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -4,6 +4,8 @@
</span><span class="cx" style="display: block; padding: 0 10px">  * Some basic Statistics for forum actions.
</span><span class="cx" style="display: block; padding: 0 10px">  * 
</span><span class="cx" style="display: block; padding: 0 10px">  * These are very ad-hoc and added on an as-needed basis.
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * 
+ * No user-specific detail is stored, only that a `key: value` action occurred `x` times.
</ins><span class="cx" style="display: block; padding: 0 10px">  */
</span><span class="cx" style="display: block; padding: 0 10px"> class Stats {
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span></span></pre></div>
<a id="sitestrunkwordpressorgpublic_htmlwpcontentpluginssupportforumssupportforumsphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: sites/trunk/wordpress.org/public_html/wp-content/plugins/support-forums/support-forums.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- sites/trunk/wordpress.org/public_html/wp-content/plugins/support-forums/support-forums.php        2022-02-15 22:30:42 UTC (rev 11561)
+++ sites/trunk/wordpress.org/public_html/wp-content/plugins/support-forums/support-forums.php  2022-02-16 05:04:32 UTC (rev 11562)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -27,6 +27,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> include( dirname( __FILE__ ) . '/inc/class-report-topic.php' );
</span><span class="cx" style="display: block; padding: 0 10px"> include( dirname( __FILE__ ) . '/inc/class-nsfw-handler.php' );
</span><span class="cx" style="display: block; padding: 0 10px"> include( dirname( __FILE__ ) . '/inc/class-stats.php' );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+include( dirname( __FILE__ ) . '/inc/class-emails.php' );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> // Compat-only includes.
</span><span class="cx" style="display: block; padding: 0 10px"> include( dirname( __FILE__ ) . '/inc/class-dropin.php' );
</span></span></pre>
</div>
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