From bcc9b88623d253553c5c50f16204b658050d5bb2 Mon Sep 17 00:00:00 2001
From: Alex Tselegidis <alextselegidis@gmail.com>
Date: Sat, 6 Nov 2021 15:17:03 +0100
Subject: [PATCH] Added support for upgrading and downgrading manually the
 database via the CLI

---
 application/controllers/Console.php |  2 ++
 application/core/EA_Migration.php   | 10 +++++++++-
 application/libraries/Instance.php  | 24 +++++++++++++++++++++++-
 3 files changed, 34 insertions(+), 2 deletions(-)

diff --git a/application/controllers/Console.php b/application/controllers/Console.php
index 39352036..b8b95844 100644
--- a/application/controllers/Console.php
+++ b/application/controllers/Console.php
@@ -167,6 +167,8 @@ class Console extends EA_Controller {
             '',
             '⇾ php index.php console migrate',
             '⇾ php index.php console migrate fresh',
+            '⇾ php index.php console migrate up',
+            '⇾ php index.php console migrate down',
             '⇾ php index.php console seed',
             '⇾ php index.php console install',
             '⇾ php index.php console backup',
diff --git a/application/core/EA_Migration.php b/application/core/EA_Migration.php
index b4cd7f0c..4d87956a 100644
--- a/application/core/EA_Migration.php
+++ b/application/core/EA_Migration.php
@@ -42,5 +42,13 @@ require_once __DIR__ . '/../../system/libraries/Migration.php';
  * @property EA_URI $uri
  */
 class EA_Migration extends CI_Migration {
-    // 
+    /**
+     * Get the current migration version.
+     *
+     * @return int
+     */
+    public function current_version(): int
+    {
+        return $this->_get_version();
+    }
 }
diff --git a/application/libraries/Instance.php b/application/libraries/Instance.php
index 1eb090f0..21e9aa4f 100644
--- a/application/libraries/Instance.php
+++ b/application/libraries/Instance.php
@@ -45,10 +45,32 @@ class Instance {
     /**
      * Migrate the database to the latest state.
      *
-     * @param string $type Provide "fresh" to revert previous migrations and start from the beginning.
+     * @param string $type Provide "fresh" to revert previous migrations and start from the beginning or "up"/"down" to step.
      */
     public function migrate(string $type = '')
     {
+        $current_version = $this->CI->migration->current_version();
+
+        if ($type === 'up')
+        {
+            if ( ! $this->CI->migration->version($current_version + 1))
+            {
+                show_error($this->CI->migration->error_string());
+            }
+
+            return;
+        }
+
+        if ($type === 'down')
+        {
+            if ( ! $this->CI->migration->version($current_version - 1))
+            {
+                show_error($this->CI->migration->error_string());
+            }
+
+            return;
+        }
+
         if ($type === 'fresh' && ! $this->CI->migration->version(0))
         {
             show_error($this->CI->migration->error_string());