- Implements link extraction, processing, replacement and saving

lib/Config/Initializer.php

@@ -68,35 +68,37 @@ class Initializer {
         'SET TIME_ZONE = "' . Env::$db_timezone_offset. '"'
     ));
 
-    $subscribers = Env::$db_prefix . 'subscribers';
     $settings = Env::$db_prefix . 'settings';
-    $newsletters = Env::$db_prefix . 'newsletters';
-    $newsletter_templates = Env::$db_prefix . 'newsletter_templates';
     $segments = Env::$db_prefix . 'segments';
     $forms = Env::$db_prefix . 'forms';
-    $subscriber_segment = Env::$db_prefix . 'subscriber_segment';
-    $newsletter_segment = Env::$db_prefix . 'newsletter_segment';
     $custom_fields = Env::$db_prefix . 'custom_fields';
+    $subscribers = Env::$db_prefix . 'subscribers';
+    $subscriber_segment = Env::$db_prefix . 'subscriber_segment';
     $subscriber_custom_field = Env::$db_prefix . 'subscriber_custom_field';
+    $newsletter_segment = Env::$db_prefix . 'newsletter_segment';
+    $sending_queues = Env::$db_prefix . 'sending_queues';
+    $newsletters = Env::$db_prefix . 'newsletters';
+    $newsletter_templates = Env::$db_prefix . 'newsletter_templates';
     $newsletter_option_fields = Env::$db_prefix . 'newsletter_option_fields';
     $newsletter_option = Env::$db_prefix . 'newsletter_option';
-    $sending_queues = Env::$db_prefix . 'sending_queues';
     $newsletter_statistics = Env::$db_prefix . 'newsletter_statistics';
+    $newsletter_links = Env::$db_prefix . 'newsletter_links';
 
-    define('MP_SUBSCRIBERS_TABLE', $subscribers);
     define('MP_SETTINGS_TABLE', $settings);
-    define('MP_NEWSLETTERS_TABLE', $newsletters);
     define('MP_SEGMENTS_TABLE', $segments);
     define('MP_FORMS_TABLE', $forms);
+    define('MP_CUSTOM_FIELDS_TABLE', $custom_fields);
+    define('MP_SUBSCRIBERS_TABLE', $subscribers);
     define('MP_SUBSCRIBER_SEGMENT_TABLE', $subscriber_segment);
+    define('MP_SUBSCRIBER_CUSTOM_FIELD_TABLE', $subscriber_custom_field);
+    define('MP_SENDING_QUEUES_TABLE', $sending_queues);
+    define('MP_NEWSLETTERS_TABLE', $newsletters);
     define('MP_NEWSLETTER_TEMPLATES_TABLE', $newsletter_templates);
     define('MP_NEWSLETTER_SEGMENT_TABLE', $newsletter_segment);
-    define('MP_CUSTOM_FIELDS_TABLE', $custom_fields);
-    define('MP_SUBSCRIBER_CUSTOM_FIELD_TABLE', $subscriber_custom_field);
     define('MP_NEWSLETTER_OPTION_FIELDS_TABLE', $newsletter_option_fields);
-    define('MP_NEWSLETTER_OPTION_TABLE', $newsletter_option);
-    define('MP_SENDING_QUEUES_TABLE', $sending_queues);
     define('MP_NEWSLETTER_STATISTICS_TABLE', $newsletter_statistics);
+    define('MP_NEWSLETTER_LINKS_TABLE', $newsletter_links);
+    define('MP_NEWSLETTER_OPTION_TABLE', $newsletter_option);
   }
 
   function runMigrator() {

lib/Config/Migrator.php

@@ -10,19 +10,20 @@ class Migrator {
     $this->prefix = Env::$db_prefix;
     $this->charset = Env::$db_charset;
     $this->models = array(
-      'subscribers',
+      'segments',
       'settings',
+      'custom_fields',
+      'sending_queues',
+      'subscribers',
+      'subscriber_segment',
+      'subscriber_custom_field',
       'newsletters',
       'newsletter_templates',
-      'segments',
-      'subscriber_segment',
-      'newsletter_segment',
-      'custom_fields',
-      'subscriber_custom_field',
       'newsletter_option_fields',
       'newsletter_option',
-      'sending_queues',
+      'newsletter_segment',
       'newsletter_statistics',
+      'newsletter_links',
       'forms'
     );
   }
@@ -49,6 +50,72 @@ class Migrator {
     array_map($drop_table, $this->models);
   }
 
+  function segments() {
+    $attributes = array(
+      'id mediumint(9) NOT NULL AUTO_INCREMENT,',
+      'name varchar(90) NOT NULL,',
+      'type varchar(90) NOT NULL DEFAULT "default",',
+      'description varchar(250) NOT NULL,',
+      'created_at TIMESTAMP NOT NULL DEFAULT 0,',
+      'deleted_at TIMESTAMP NULL DEFAULT NULL,',
+      'updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,',
+      'PRIMARY KEY  (id),',
+      'UNIQUE KEY name (name)'
+    );
+    return $this->sqlify(__FUNCTION__, $attributes);
+  }
+
+  function settings() {
+    $attributes = array(
+      'id mediumint(9) NOT NULL AUTO_INCREMENT,',
+      'name varchar(20) NOT NULL,',
+      'value longtext,',
+      'created_at TIMESTAMP NOT NULL DEFAULT 0,',
+      'updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,',
+      'PRIMARY KEY  (id),',
+      'UNIQUE KEY name (name)'
+    );
+    return $this->sqlify(__FUNCTION__, $attributes);
+  }
+
+  function custom_fields() {
+    $attributes = array(
+      'id mediumint(9) NOT NULL AUTO_INCREMENT,',
+      'name varchar(90) NOT NULL,',
+      'type varchar(90) NOT NULL,',
+      'params longtext NOT NULL,',
+      'created_at TIMESTAMP NOT NULL DEFAULT 0,',
+      'updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,',
+      'PRIMARY KEY  (id),',
+      'UNIQUE KEY name (name)'
+    );
+    return $this->sqlify(__FUNCTION__, $attributes);
+  }
+
+  function sending_queues() {
+    $attributes = array(
+      'id mediumint(9) NOT NULL AUTO_INCREMENT,',
+      'newsletter_id mediumint(9) NOT NULL,',
+      'newsletter_rendered_body longtext,',
+      'newsletter_rendered_body_hash varchar(250) NULL DEFAULT NULL,',
+      'newsletter_rendered_subject varchar(250) NULL DEFAULT NULL,',
+      'subscribers longtext,',
+      'status varchar(12) NULL DEFAULT NULL,',
+      'priority mediumint(9) NOT NULL DEFAULT 0,',
+      'count_total mediumint(9) NOT NULL DEFAULT 0,',
+      'count_processed mediumint(9) NOT NULL DEFAULT 0,',
+      'count_to_process mediumint(9) NOT NULL DEFAULT 0,',
+      'count_failed mediumint(9) NOT NULL DEFAULT 0,',
+      'scheduled_at TIMESTAMP NOT NULL DEFAULT 0,',
+      'processed_at TIMESTAMP NOT NULL DEFAULT 0,',
+      'created_at TIMESTAMP NOT NULL DEFAULT 0,',
+      'updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,',
+      'deleted_at TIMESTAMP NULL DEFAULT NULL,',
+      'PRIMARY KEY  (id)',
+    );
+    return $this->sqlify(__FUNCTION__, $attributes);
+  }
+
   function subscribers() {
     $attributes = array(
       'id mediumint(9) NOT NULL AUTO_INCREMENT,',
@@ -66,15 +133,30 @@ class Migrator {
     return $this->sqlify(__FUNCTION__, $attributes);
   }
 
-  function settings() {
+  function subscriber_segment() {
     $attributes = array(
       'id mediumint(9) NOT NULL AUTO_INCREMENT,',
-      'name varchar(20) NOT NULL,',
+      'subscriber_id mediumint(9) NOT NULL,',
-      'value longtext,',
+      'segment_id mediumint(9) NOT NULL,',
+      'status varchar(12) NOT NULL DEFAULT "subscribed",',
       'created_at TIMESTAMP NOT NULL DEFAULT 0,',
       'updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,',
       'PRIMARY KEY  (id),',
-      'UNIQUE KEY name (name)'
+      'UNIQUE KEY subscriber_segment (subscriber_id,segment_id)'
+    );
+    return $this->sqlify(__FUNCTION__, $attributes);
+  }
+
+  function subscriber_custom_field() {
+    $attributes = array(
+      'id mediumint(9) NOT NULL AUTO_INCREMENT,',
+      'subscriber_id mediumint(9) NOT NULL,',
+      'custom_field_id mediumint(9) NOT NULL,',
+      'value varchar(255) NOT NULL,',
+      'created_at TIMESTAMP NOT NULL DEFAULT 0,',
+      'updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,',
+      'PRIMARY KEY  (id),',
+      'UNIQUE KEY subscriber_id_custom_field_id (subscriber_id,custom_field_id)'
     );
     return $this->sqlify(__FUNCTION__, $attributes);
   }
@@ -113,76 +195,6 @@ class Migrator {
     return $this->sqlify(__FUNCTION__, $attributes);
   }
 
-  function segments() {
-    $attributes = array(
-      'id mediumint(9) NOT NULL AUTO_INCREMENT,',
-      'name varchar(90) NOT NULL,',
-      'type varchar(90) NOT NULL DEFAULT "default",',
-      'description varchar(250) NOT NULL,',
-      'created_at TIMESTAMP NOT NULL DEFAULT 0,',
-      'deleted_at TIMESTAMP NULL DEFAULT NULL,',
-      'updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,',
-      'PRIMARY KEY  (id),',
-      'UNIQUE KEY name (name)'
-    );
-    return $this->sqlify(__FUNCTION__, $attributes);
-  }
-
-  function subscriber_segment() {
-    $attributes = array(
-      'id mediumint(9) NOT NULL AUTO_INCREMENT,',
-      'subscriber_id mediumint(9) NOT NULL,',
-      'segment_id mediumint(9) NOT NULL,',
-      'status varchar(12) NOT NULL DEFAULT "subscribed",',
-      'created_at TIMESTAMP NOT NULL DEFAULT 0,',
-      'updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,',
-      'PRIMARY KEY  (id),',
-      'UNIQUE KEY subscriber_segment (subscriber_id,segment_id)'
-    );
-    return $this->sqlify(__FUNCTION__, $attributes);
-  }
-
-  function newsletter_segment() {
-    $attributes = array(
-      'id mediumint(9) NOT NULL AUTO_INCREMENT,',
-      'newsletter_id mediumint(9) NOT NULL,',
-      'segment_id mediumint(9) NOT NULL,',
-      'created_at TIMESTAMP NOT NULL DEFAULT 0,',
-      'updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,',
-      'PRIMARY KEY  (id),',
-      'UNIQUE KEY newsletter_segment (newsletter_id,segment_id)'
-    );
-    return $this->sqlify(__FUNCTION__, $attributes);
-  }
-
-  function custom_fields() {
-    $attributes = array(
-      'id mediumint(9) NOT NULL AUTO_INCREMENT,',
-      'name varchar(90) NOT NULL,',
-      'type varchar(90) NOT NULL,',
-      'params longtext NOT NULL,',
-      'created_at TIMESTAMP NOT NULL DEFAULT 0,',
-      'updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,',
-      'PRIMARY KEY  (id),',
-      'UNIQUE KEY name (name)'
-    );
-    return $this->sqlify(__FUNCTION__, $attributes);
-  }
-
-  function subscriber_custom_field() {
-    $attributes = array(
-      'id mediumint(9) NOT NULL AUTO_INCREMENT,',
-      'subscriber_id mediumint(9) NOT NULL,',
-      'custom_field_id mediumint(9) NOT NULL,',
-      'value varchar(255) NOT NULL,',
-      'created_at TIMESTAMP NOT NULL DEFAULT 0,',
-      'updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,',
-      'PRIMARY KEY  (id),',
-      'UNIQUE KEY subscriber_id_custom_field_id (subscriber_id,custom_field_id)'
-    );
-    return $this->sqlify(__FUNCTION__, $attributes);
-  }
-
   function newsletter_option_fields() {
     $attributes = array(
       'id mediumint(9) NOT NULL AUTO_INCREMENT,',
@@ -210,26 +222,15 @@ class Migrator {
     return $this->sqlify(__FUNCTION__, $attributes);
   }
 
-  function sending_queues() {
+  function newsletter_segment() {
     $attributes = array(
       'id mediumint(9) NOT NULL AUTO_INCREMENT,',
       'newsletter_id mediumint(9) NOT NULL,',
-      'newsletter_rendered_body longtext,',
+      'segment_id mediumint(9) NOT NULL,',
-      'newsletter_rendered_body_hash varchar(250) NULL DEFAULT NULL,',
-      'newsletter_rendered_subject varchar(250) NULL DEFAULT NULL,',
-      'subscribers longtext,',
-      'status varchar(12) NULL DEFAULT NULL,',
-      'priority mediumint(9) NOT NULL DEFAULT 0,',
-      'count_total mediumint(9) NOT NULL DEFAULT 0,',
-      'count_processed mediumint(9) NOT NULL DEFAULT 0,',
-      'count_to_process mediumint(9) NOT NULL DEFAULT 0,',
-      'count_failed mediumint(9) NOT NULL DEFAULT 0,',
-      'scheduled_at TIMESTAMP NOT NULL DEFAULT 0,',
-      'processed_at TIMESTAMP NOT NULL DEFAULT 0,',
       'created_at TIMESTAMP NOT NULL DEFAULT 0,',
       'updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,',
-      'deleted_at TIMESTAMP NULL DEFAULT NULL,',
+      'PRIMARY KEY  (id),',
-      'PRIMARY KEY  (id)',
+      'UNIQUE KEY newsletter_segment (newsletter_id,segment_id)'
     );
     return $this->sqlify(__FUNCTION__, $attributes);
   }
@@ -246,6 +247,20 @@ class Migrator {
     return $this->sqlify(__FUNCTION__, $attributes);
   }
 
+  function newsletter_links() {
+    $attributes = array(
+      'id mediumint(9) NOT NULL AUTO_INCREMENT,',
+      'newsletter_id mediumint(9) NOT NULL,',
+      'queue_id mediumint(9) NOT NULL,',
+      'url varchar(255) NOT NULL,',
+      'hash varchar(20) NOT NULL,',
+      'created_at TIMESTAMP NOT NULL DEFAULT 0,',
+      'updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,',
+      'PRIMARY KEY  (id)',
+    );
+    return $this->sqlify(__FUNCTION__, $attributes);
+  }
+
   function forms() {
     $attributes = array(
       'id mediumint(9) NOT NULL AUTO_INCREMENT,',

lib/Cron/Workers/SendingQueue.php

@@ -4,9 +4,11 @@ namespace MailPoet\Cron\Workers;
 use MailPoet\Cron\CronHelper;
 use MailPoet\Mailer\Mailer;
 use MailPoet\Models\Newsletter;
+use MailPoet\Models\NewsletterLink;
 use MailPoet\Models\NewsletterStatistics;
 use MailPoet\Models\Setting;
 use MailPoet\Models\Subscriber;
+use MailPoet\Newsletter\Links\Links;
 use MailPoet\Newsletter\Renderer\Renderer;
 use MailPoet\Newsletter\Shortcodes\Shortcodes;
 use MailPoet\Util\Helpers;
@@ -17,6 +19,7 @@ class SendingQueue {
   public $mta_config;
   public $mta_log;
   public $processing_method;
+  public $divider = '***MailPoet***';
   private $timer;
   const batch_size = 50;
 
@@ -38,7 +41,7 @@ class SendingQueue {
         continue;
       }
       $newsletter = $newsletter->asArray();
-      $newsletter['body'] = $this->getNewsletterBodyAndSubject($queue, $newsletter);
+      $newsletter['body'] = $this->getOrRenderNewsletterBody($queue, $newsletter);
       $queue->subscribers = (object) unserialize($queue->subscribers);
       if(!isset($queue->subscribers->processed)) {
         $queue->subscribers->processed = array();
@@ -67,11 +70,20 @@ class SendingQueue {
     }
   }
 
-  function getNewsletterBodyAndSubject($queue, $newsletter) {
+  function getOrRenderNewsletterBody($queue, $newsletter) {
     // check if newsletter has been rendered, in which case return its contents
-    // or render & and for future use
+    // or render and save for future reuse
     if($queue->newsletter_rendered_body === null) {
-      $newsletter['body'] = $this->renderNewsletter($newsletter);
+      // render newsletter
+      $rendered_newsletter = $this->renderNewsletter($newsletter);
+      // extract and replace links
+      $processed_newsletter = $this->processLinks(
+        $this->joinObject($rendered_newsletter),
+        $newsletter['id'],
+        $queue->id
+      );
+      list($newsletter['body']['html'], $newsletter['body']['text']) =
+        $this->splitObject($processed_newsletter);
       $queue->newsletter_rendered_body = json_encode($newsletter['body']);
       $queue->newsletter_rendered_body_hash = md5($newsletter['body']['text']);
       $queue->save();
@@ -84,7 +96,7 @@ class SendingQueue {
   function processBulkSubscribers($mailer, $newsletter, $subscribers, $queue) {
     foreach($subscribers as $subscriber) {
       $processed_newsletters[] =
-        $this->processNewsletter($newsletter, $subscriber);
+        $this->processNewsletter($newsletter, $subscriber, $queue);
       $transformed_subscribers[] =
         $mailer->transformSubscriber($subscriber);
     }
@@ -125,8 +137,8 @@ class SendingQueue {
   function processIndividualSubscriber($mailer, $newsletter, $subscribers, $queue) {
     foreach($subscribers as $subscriber) {
       $this->checkSendingLimit();
-      $processed_newsletter = $this->processNewsletter($newsletter, $subscriber);
+      $processed_newsletter = $this->processNewsletter($newsletter, $subscriber, $queue);
-      if (!$queue->newsletter_rendered_subject) {
+      if(!$queue->newsletter_rendered_subject) {
         $queue->newsletter_rendered_subject = $processed_newsletter['subject'];
       }
       $transformed_subscriber = $mailer->transformSubscriber($subscriber);
@@ -162,22 +174,61 @@ class SendingQueue {
     return $renderer->render();
   }
 
-  function processNewsletter($newsletter, $subscriber = false) {
+  function processLinks($text, $newsletter_id, $queue_id) {
-    $divider = '***MailPoet***';
+    $links = new Links();
-    $data_for_shortcodes =
+    list($text, $processed_links) = $links->replace($text);
-      array_merge(array($newsletter['subject']), $newsletter['body']);
+    foreach($processed_links as $link) {
-    $body = implode($divider, $data_for_shortcodes);
+      // save extracted and processed links
-    $shortcodes = new Shortcodes(
+      $newsletter_link = NewsletterLink::create();
+      $newsletter_link->newsletter_id = $newsletter_id;
+      $newsletter_link->queue_id = $queue_id;
+      $newsletter_link->hash = $link['hash'];
+      $newsletter_link->url = $link['url'];
+      $newsletter_link->save();
+    }
+    return $text;
+  }
+
+  function processNewsletter($newsletter, $subscriber = false, $queue) {
+    $data_for_shortcodes = array(
+      $newsletter['subject'],
+      $newsletter['body']['html'],
+      $newsletter['body']['text']
+    );
+    $processed_newsletter = $this->replaceShortcodes(
       $newsletter,
-      $subscriber
+      $subscriber,
+      $this->joinObject($data_for_shortcodes)
+    );
+    $processed_newsletter = $this->replaceLinks(
+      $newsletter['id'],
+      $subscriber['id'],
+      $queue->id,
+      $processed_newsletter
     );
     list($newsletter['subject'],
       $newsletter['body']['html'],
       $newsletter['body']['text']
-      ) = explode($divider, $shortcodes->replace($body));
+      ) = $this->splitObject($processed_newsletter);
     return $newsletter;
   }
 
+  function replaceLinks($newsletter_id, $subscriber_id, $queue_id, $body) {
+    return str_replace(
+      '[mailpoet_data]',
+      sprintf('%s-%s-%s', $newsletter_id, $subscriber_id, $queue_id),
+      $body
+    );
+  }
+
+  function replaceShortcodes($newsletter, $subscriber, $body) {
+    $shortcodes = new Shortcodes(
+      $newsletter,
+      $subscriber
+    );
+    return $shortcodes->replace($body);
+  }
+
   function sendNewsletter($mailer, $newsletter, $subscriber) {
     return $mailer->mailer_instance->send(
       $newsletter,
@@ -284,4 +335,12 @@ class SendingQueue {
     }
     return;
   }
+
+  private function joinObject($object = array()) {
+    return implode($this->divider, $object);
+  }
+
+  private function splitObject($object = array()) {
+    return explode($this->divider, $object);
+  }
 }

lib/Models/NewsletterLink.php

@@ -0,0 +1,12 @@
+<?php
+namespace MailPoet\Models;
+
+if(!defined('ABSPATH')) exit;
+
+class NewsletterLink extends Model {
+  public static $_table = MP_NEWSLETTER_LINKS_TABLE;
+
+  function __construct() {
+    parent::__construct();
+  }
+}

lib/Models/StatisticsClicks.php

@@ -3,8 +3,8 @@ namespace MailPoet\Models;
 
 if(!defined('ABSPATH')) exit;
 
-class NewsletterStatistics extends Model {
+class StatisticsNewsletters extends Model {
-  public static $_table = MP_NEWSLETTER_STATISTICS_TABLE;
+  public static $_table = MP_STATISTICS_NEWSLETTERS_TABLE;
 
   function __construct() {
     parent::__construct();
@@ -12,7 +12,7 @@ class NewsletterStatistics extends Model {
 
   static function createMultiple($data) {
     return self::rawExecute(
-      'INSERT INTO `' . NewsletterStatistics::$_table . '` ' .
+      'INSERT INTO `' . self::$_table . '` ' .
       '(newsletter_id, subscriber_id, queue_id) ' .
       'VALUES ' . rtrim(
         str_repeat('(?,?,?), ', count($data)/3),

lib/Models/StatisticsNewsletters.php

@@ -0,0 +1,24 @@
+<?php
+namespace MailPoet\Models;
+
+if(!defined('ABSPATH')) exit;
+
+class StatisticsNewsletters extends Model {
+  public static $_table = MP_STATISTICS_NEWSLETTERS_TABLE;
+
+  function __construct() {
+    parent::__construct();
+  }
+
+  static function createMultiple($data) {
+    return self::rawExecute(
+      'INSERT INTO `' . self::$_table . '` ' .
+      '(newsletter_id, subscriber_id, queue_id) ' .
+      'VALUES ' . rtrim(
+        str_repeat('(?,?,?), ', count($data)/3),
+        ', '
+      ),
+      $data
+    );
+  }
+}

lib/Newsletter/Links/Links.php

@@ -0,0 +1,61 @@
+<?php
+namespace MailPoet\Newsletter\Links;
+
+use MailPoet\Util\Security;
+
+class Links {
+  public $newsletter_id;
+  public $queue_id;
+  public $subscriber_id;
+
+  function __construct(
+    $newsletter_id = false,
+    $subscriber_id = false,
+    $queue_id = false) {
+    $this->newsletter_id = $newsletter_id;
+    $this->queue_id = $queue_id;
+    $this->subscriber_id = $subscriber_id;
+  }
+
+  function extract($text) {
+    // adopted from WP's wp_extract_urls() function &  modified to work on hrefs
+    $regex = '#(?:href.*?=.*?)(["\']?)('
+      . '(?:([\w-]+:)?//?)'
+      . '[^\s()<>]+'
+      . '[.]'
+      . '(?:'
+      . '\([\w\d]+\)|'
+      . '(?:'
+      . '[^`!()\[\]{};:\'".,<>«»“”‘’\s]|'
+      . '(?:[:]\d+)?/?'
+      . ')+'
+      . ')'
+      . ')\\1#';
+    preg_match_all($regex, $text, $links);
+    preg_match_all('/\[\w+:\w+\]/', $text, $shortcodes);
+    return array_merge(
+      array_unique($links[2]),
+      array_unique($shortcodes[0])
+    );
+  }
+
+  function replace($text, $links = false) {
+    $links = ($links) ? $links : $this->extract($text);
+    $processed_links = array();
+    foreach($links as $link) {
+      $hash = Security::generateRandomString(5);
+      $processed_links[] = array(
+        'hash' => $hash,
+        'url' => $link
+      );
+      $encoded_link = sprintf(
+        '%s/?mailpoet&endpoint=track&data=%s',
+        home_url(),
+        '[mailpoet_data]-'.$hash
+      );
+      $link_regex = '/' . preg_quote($link, '/') . '/';
+      $text = preg_replace($link_regex, $encoded_link, $text);
+    }
+    return array($text, $processed_links);
+  }
+}

lib/Newsletter/Shortcodes/Shortcodes.php

@@ -26,9 +26,12 @@ class Shortcodes {
           $shortcode,
           $shortcode_details
         );
-        $shortcode_class =
+        $shortcode_type = ucfirst($shortcode_details['type']);
-          __NAMESPACE__ . '\\Categories\\' . ucfirst($shortcode_details['type']);
         $shortcode_action = $shortcode_details['action'];
+        // do not process subscription management links
+        if ($shortcode_type === 'Subscription') return $shortcode;
+        $shortcode_class =
+          __NAMESPACE__ . '\\Categories\\' . $shortcode_type;
         $shortcode_default_value = isset($shortcode_details['default'])
           ? $shortcode_details['default'] : false;
         if(!class_exists($shortcode_class)) return false;