Merge pull request #743 from mailpoet/vendor_conflict

Add dependency checking requirement [MAILPOET-690]

lib/Config/Initializer.php

@@ -22,10 +22,11 @@ class Initializer {
   }
 
   function init() {
-    $requiments_check_results = $this->checkRequirements();
+    $requirements_check_results = $this->checkRequirements();
 
     // abort initialization if PDO extension is missing
-    if(!$requiments_check_results[RequirementsChecker::TEST_PDO_EXTENSION]) return;
+    if(!$requirements_check_results[RequirementsChecker::TEST_PDO_EXTENSION] ||
+      !$requirements_check_results[RequirementsChecker::TEST_VENDOR_SOURCE]) return;
 
     $this->setupDB();
 

lib/Config/RequirementsChecker.php

@@ -1,6 +1,7 @@
 <?php
 namespace MailPoet\Config;
 
+use MailPoet\Config\Env;
 use MailPoet\Util\Helpers;
 use MailPoet\WP\Notice as WPNotice;
 
@@ -11,7 +12,30 @@ class RequirementsChecker {
   const TEST_FOLDER_PERMISSIONS = 'TempAndCacheFolderCreation';
   const TEST_PDO_EXTENSION = 'PDOExtension';
   const TEST_MBSTRING_EXTENSION = 'MbstringExtension';
+  const TEST_VENDOR_SOURCE = 'VendorSource';
+
   public $display_error_notice;
+  public $vendor_classes = array(
+      '\ORM',
+      '\Model',
+      '\Twig_Environment',
+      '\Twig_Loader_Filesystem',
+      '\Twig_Lexer',
+      '\Twig_Extension',
+      '\Twig_Extension_GlobalsInterface',
+      '\Twig_SimpleFunction',
+      '\Swift_Mailer',
+      '\Swift_SmtpTransport',
+      '\Swift_Message',
+      '\Carbon\Carbon',
+      '\Sudzy\ValidModel',
+      '\Sudzy\ValidationException',
+      '\Sudzy\Engine',
+      '\pQuery',
+      '\Cron\CronExpression',
+      '\Html2Text\Html2Text',
+      '\csstidy'
+  );
 
   function __construct($display_error_notice = true) {
     $this->display_error_notice = $display_error_notice;
@@ -22,7 +46,8 @@ class RequirementsChecker {
       self::TEST_PDO_EXTENSION,
       self::TEST_PHP_VERSION,
       self::TEST_FOLDER_PERMISSIONS,
-      self::TEST_MBSTRING_EXTENSION
+      self::TEST_MBSTRING_EXTENSION,
+      self::TEST_VENDOR_SOURCE
     );
     $results = array();
     foreach($available_tests as $test) {
@@ -84,6 +109,43 @@ class RequirementsChecker {
     return true;
   }
 
+  function checkVendorSource() {
+    foreach($this->vendor_classes as $dependency) {
+      $dependency_path = $this->getDependencyPath($dependency);
+      if(!$dependency_path) {
+        $error = sprintf(
+          __('A MailPoet dependency (%s) does not appear to be loaded correctly, thus MailPoet will not work correctly. Please reinstall the plugin.', 'mailpoet'),
+          $dependency
+        );
+
+        return $this->processError($error);
+      }
+
+      $pattern = '#' . preg_quote(Env::$path) . '[\\\/]#';
+      $is_loaded_by_plugin = preg_match($pattern, $dependency_path);
+      if(!$is_loaded_by_plugin) {
+        $error = sprintf(
+          __('MailPoet has detected a dependency conflict (%s) with another plugin (%s), which may cause unexpected behavior. Please disable the offending plugin to fix this issue.', 'mailpoet'),
+          $dependency,
+          $dependency_path
+        );
+
+        return $this->processError($error);
+      }
+    }
+
+    return true;
+  }
+
+  private function getDependencyPath($namespaced_class) {
+    try {
+      $reflector = new \ReflectionClass($namespaced_class);
+      return $reflector->getFileName();
+    } catch(\ReflectionException $ex) {
+      return false;
+    }
+  }
+
   function processError($error) {
     if($this->display_error_notice) {
       WPNotice::displayError($error);

lib/Util/CSS.php

@@ -1,6 +1,5 @@
 <?php
 namespace MailPoet\Util;
-use \Sunra\PhpSimple\HtmlDomParser;
 use csstidy;
 
 /*