Migration from Mailpoet 2 to Mailpoet 3 : phase 0

Interface

lib/Config/MP2Migrator.php

@@ -0,0 +1,124 @@
+<?php
+namespace MailPoet\Config;
+
+use MailPoet\Util\ProgressBar;
+
+if(!defined('ABSPATH')) exit;
+
+class MP2Migrator {
+
+	private $log_file;
+	public $log_file_url;
+  public $progressbar;
+  
+  public function __construct() {
+    $log_filename = Env::$plugin_name . '-mp2migration.log';
+		$upload_dir = wp_upload_dir();
+		$this->log_file = $upload_dir['basedir'] . '/' . $log_filename;
+    $this->log_file_url = $upload_dir['baseurl'] . '/' . $log_filename;
+    $this->progressbar = new ProgressBar('mp2migration');
+  }
+  
+  /**
+   * Test if the migration is proposed
+   * 
+   * @return boolean
+   */
+  public function proposeMigration() {
+    if ( isset($_REQUEST['nomigrate']) ) {
+      // Store the user's choice if he doesn't want to migrate from MP2
+      update_option('mailpoet_migration_complete', true);
+    }
+    if ( get_option('mailpoet_migration_complete') ) {
+      return false;
+    } else {
+      return $this->table_exists('wysija_campaign'); // Check if the MailPoet 2 tables exist
+    }
+  }
+  
+  /**
+   * Test if a table exists
+   *
+   * @param string $table Table name
+   * @return boolean
+   */
+  public function table_exists($table) {
+    global $wpdb;
+
+    try {
+      $sql = "SHOW TABLES LIKE '{$wpdb->prefix}{$table}'";
+      $result = $wpdb->query($sql);
+      return !empty($result);
+    } catch ( Exception $e ) {}
+    
+    return false;
+  }
+  
+  /**
+   * Initialize the migration page
+   * 
+   */
+  public function init() {
+    $this->enqueue_scripts();
+    $this->log('INIT');
+  }
+  
+  /**
+   * Register the JavaScript for the admin area.
+   *
+   */
+  private function enqueue_scripts() {
+    wp_enqueue_script('jquery-ui-progressbar');
+  }
+
+   /**
+   * Write a message in the log file
+   * 
+   * @param string $message
+   */
+  public function log($message) {
+    file_put_contents($this->log_file, "$message\n", FILE_APPEND);
+  }
+
+  /**
+   * Import the data from MailPoet 2
+   * 
+   * @return boolean Result
+   */
+  public function import() {
+    $this->log('START IMPORT');
+		update_option('mailpoet_stop_import', false, false); // Reset the stop import action
+    
+    // TODO to remove, for testing only
+    $this->progressbar->set_total_count(0);
+    $this->progressbar->set_total_count(10);
+    for ( $i = 0; $i < 10; $i++ ) {
+      $this->progressbar->increment_current_count(1);
+      usleep(300000);
+      if ( $this->import_stopped() ) {
+        return;
+      }
+    }
+    
+    $this->log('END IMPORT');
+  }
+  
+  /**
+   * Stop the import
+   * 
+   */
+  public function stop_import() {
+    update_option('mailpoet_stop_import', true);
+    $this->log('IMPORT STOPPED BY USER');
+  }
+
+  /**
+   * Test if the import must stop
+   * 
+   * @return boolean Import must stop or not
+   */
+  public function import_stopped() {
+    return get_option('mailpoet_stop_import');
+  }
+		
+}

lib/Config/Menu.php

@@ -1,6 +1,7 @@
 <?php
 namespace MailPoet\Config;
 
+use MailPoet\Config\MP2Migrator;
 use MailPoet\Cron\CronTrigger;
 use MailPoet\Form\Block;
 use MailPoet\Form\Renderer as FormRenderer;
@@ -270,13 +271,25 @@ class Menu {
       $redirect_url = admin_url('admin.php?page=mailpoet-newsletters');
     }
 
-    $data = array(
-      'settings' => Setting::getAll(),
-      'current_user' => wp_get_current_user(),
-      'redirect_url' => $redirect_url,
-      'sub_menu' => 'mailpoet-newsletters'
-    );
-    $this->displayPage('welcome.html', $data);
+    $mp2Migrator = new MP2Migrator();
+    if ($mp2Migrator->proposeMigration()) {
+      $mp2Migrator->init();
+      $data = array(
+        'log_file_url' => $mp2Migrator->log_file_url,
+        'progress_url' => $mp2Migrator->progressbar->url,
+      );
+      $this->displayPage('mp2migration.html', $data);
+      
+    } else {
+
+      $data = array(
+        'settings' => Setting::getAll(),
+        'current_user' => wp_get_current_user(),
+        'redirect_url' => $redirect_url,
+        'sub_menu' => 'mailpoet-newsletters'
+      );
+      $this->displayPage('welcome.html', $data);
+    }
   }
 
   function update() {