From 2a40c8fc16ddad22ff9f24089662d04ac951d700 Mon Sep 17 00:00:00 2001
From: catch <catch@35733.no-reply.drupal.org>
Date: Tue, 18 Jan 2022 11:32:59 +0000
Subject: [PATCH] =?UTF-8?q?Issue=20#3192487=20by=20andypost,=20murilohp,?=
 =?UTF-8?q?=20G=C3=A1bor=20Hojtsy,=20daffie,=20pobster,=20apaderno:=20Warn?=
 =?UTF-8?q?=20about=20upcoming=20JSON=20database=20support=20requirement?=
 =?UTF-8?q?=20in=20Drupal=209?=
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(cherry picked from commit 206d6ee6587671a34267b14ac7aa2440e85dace2)
---
 core/lib/Drupal/Core/Database/Connection.php     | 15 +++++++++++++++
 .../src/Driver/Database/pgsql/Connection.php     | 12 ++++++++++++
 core/modules/system/system.install               | 16 ++++++++++++++++
 .../tests/src/Functional/System/StatusTest.php   |  8 ++++++++
 4 files changed, 51 insertions(+)

diff --git a/core/lib/Drupal/Core/Database/Connection.php b/core/lib/Drupal/Core/Database/Connection.php
index cea7fc4028e..da910131e11 100644
--- a/core/lib/Drupal/Core/Database/Connection.php
+++ b/core/lib/Drupal/Core/Database/Connection.php
@@ -2185,4 +2185,19 @@ abstract class Connection {
     return \Drupal::service('pager.manager');
   }
 
+  /**
+   * Runs a simple query to validate json datatype support.
+   *
+   * @return bool
+   *   Returns the query result.
+   */
+  public function hasJson(): bool {
+    try {
+      return (bool) $this->query('SELECT JSON_TYPE(\'1\')');
+    }
+    catch (\Exception $e) {
+      return FALSE;
+    }
+  }
+
 }
diff --git a/core/modules/pgsql/src/Driver/Database/pgsql/Connection.php b/core/modules/pgsql/src/Driver/Database/pgsql/Connection.php
index fc2ab6508f8..b36525b337e 100644
--- a/core/modules/pgsql/src/Driver/Database/pgsql/Connection.php
+++ b/core/modules/pgsql/src/Driver/Database/pgsql/Connection.php
@@ -368,6 +368,18 @@ class Connection extends DatabaseConnection {
     }
   }
 
+  /**
+   * {@inheritDoc}
+   */
+  public function hasJson(): bool {
+    try {
+      return (bool) $this->query('SELECT JSON_TYPEOF(\'1\')');
+    }
+    catch (\Exception $e) {
+      return FALSE;
+    }
+  }
+
 }
 
 /**
diff --git a/core/modules/system/system.install b/core/modules/system/system.install
index 3a8a5b2dcb6..b24d7d1651a 100644
--- a/core/modules/system/system.install
+++ b/core/modules/system/system.install
@@ -487,6 +487,22 @@ function system_requirements($phase) {
     }
   }
 
+  if ($phase == 'runtime') {
+    // Test JSON support. To be required from Drupal 10.0.
+    // @todo remove in https://www.drupal.org/project/drupal/issues/3203193
+    $requirements['database_support_json'] = [
+      'title' => t('Database support for JSON'),
+      'severity' => REQUIREMENT_OK,
+      'value' => t('Available'),
+      'description' => t('Is required in Drupal 10.0.'),
+    ];
+
+    if (!Database::getConnection()->hasJson()) {
+      $requirements['database_support_json']['value'] = t('Not available');
+      $requirements['database_support_json']['severity'] = REQUIREMENT_WARNING;
+    }
+  }
+
   // Test PHP memory_limit
   $memory_limit = ini_get('memory_limit');
   $requirements['php_memory_limit'] = [
diff --git a/core/modules/system/tests/src/Functional/System/StatusTest.php b/core/modules/system/tests/src/Functional/System/StatusTest.php
index 562c491d1cf..f2d9fb479eb 100644
--- a/core/modules/system/tests/src/Functional/System/StatusTest.php
+++ b/core/modules/system/tests/src/Functional/System/StatusTest.php
@@ -91,6 +91,14 @@ class StatusTest extends BrowserTestBase {
     $this->drupalGet('admin/reports/status');
     $this->assertSession()->elementExists('xpath', '//details[contains(@class, "system-status-report__entry")]//div[contains(text(), "Cron has not run recently")]');
     \Drupal::state()->set('system.cron_last', $cron_last_run);
+
+    // Check if JSON database support is enabled.
+    $this->assertSession()->pageTextContains('Database support for JSON');
+    $elements = $this->xpath('//details[@class="system-status-report__entry"]//div[contains(text(), :text)]', [
+      ':text' => 'Is required in Drupal 10.0.',
+    ]);
+    $this->assertCount(1, $elements);
+    $this->assertStringStartsWith('Available', $elements[0]->getParent()->getText());
   }
 
 }