From 06cf03738738164143dd117cfa2f55223603210c Mon Sep 17 00:00:00 2001
From: Stefan Giehl <stefan@matomo.org>
Date: Mon, 25 Jul 2022 02:37:45 +0200
Subject: Adds unique index for user email (#19560)

---
 core/Db/Schema/Mysql.php   |  3 ++-
 core/Updates/4.12.0-b2.php | 52 ++++++++++++++++++++++++++++++++++++++++++++++
 core/Version.php           |  2 +-
 3 files changed, 55 insertions(+), 2 deletions(-)
 create mode 100644 core/Updates/4.12.0-b2.php

diff --git a/core/Db/Schema/Mysql.php b/core/Db/Schema/Mysql.php
index 1f8bc7d5f9..9ac76c951d 100644
--- a/core/Db/Schema/Mysql.php
+++ b/core/Db/Schema/Mysql.php
@@ -57,7 +57,8 @@ class Mysql implements SchemaInterface
                           invite_token VARCHAR(191) NULL,
                           invite_expired_at TIMESTAMP NULL,
                           invite_accept_at TIMESTAMP NULL,
-                            PRIMARY KEY(login)
+                            PRIMARY KEY(login),
+                            UNIQUE INDEX `uniq_email` (`email`)
                           ) ENGINE=$engine DEFAULT CHARSET=$charset
             ",
             'user_token_auth' => "CREATE TABLE {$prefixTables}user_token_auth (
diff --git a/core/Updates/4.12.0-b2.php b/core/Updates/4.12.0-b2.php
new file mode 100644
index 0000000000..829b22ef10
--- /dev/null
+++ b/core/Updates/4.12.0-b2.php
@@ -0,0 +1,52 @@
+<?php
+
+/**
+ * Matomo - free/libre analytics platform
+ *
+ * @link    https://matomo.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ *
+ */
+
+namespace Piwik\Updates;
+
+use Piwik\Updater;
+use Piwik\Updates as PiwikUpdates;
+use Piwik\Updater\Migration;
+use Piwik\Updater\Migration\Factory as MigrationFactory;
+
+/**
+ * Update for version 4.12.0-b2
+ */
+class Updates_4_12_0_b2 extends PiwikUpdates
+{
+    /**
+     * @var MigrationFactory
+     */
+    private $migration;
+
+    public function __construct(MigrationFactory $factory)
+    {
+        $this->migration = $factory;
+    }
+
+    /**
+     * @param Updater $updater
+     *
+     * @return Migration[]
+     */
+    public function getMigrations(Updater $updater)
+    {
+        $uniqueIndex = $this->migration->db->addUniqueKey('user', 'email', 'uniq_email');
+
+        // if for some reason a duplicate email exists we simply ignore the error and don't add the index.
+        $uniqueIndex->addErrorCodeToIgnore(Migration\Db::ERROR_CODE_DUPLICATE_ENTRY);
+
+        return [$uniqueIndex];
+    }
+
+    public function doUpdate(Updater $updater)
+    {
+        $updater->executeMigrations(__FILE__, $this->getMigrations($updater));
+    }
+}
diff --git a/core/Version.php b/core/Version.php
index 9a5e30e677..1c774e811c 100644
--- a/core/Version.php
+++ b/core/Version.php
@@ -21,7 +21,7 @@ final class Version
      * The current Matomo version.
      * @var string
      */
-    const VERSION = '4.12.0-b1';
+    const VERSION = '4.12.0-b2';
 
     const MAJOR_VERSION = 4;
 
-- 
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