summaryrefslogtreecommitdiffstats
path: root/system/libraries/Migration.php
diff options
context:
space:
mode:
authorPhil Sturgeon <email@philsturgeon.co.uk>2011-02-14 22:53:48 +0100
committerPhil Sturgeon <email@philsturgeon.co.uk>2011-02-14 22:53:48 +0100
commitf46d9d6abdc6ae71a3307cf76f7064d0aa18eb65 (patch)
tree6dc46635e77115b521fb52b965c079dfc8f428f8 /system/libraries/Migration.php
parentff5c948222d5985312be71b917594e5e438addc3 (diff)
Removed Migration code for now, will come back later.
Diffstat (limited to 'system/libraries/Migration.php')
-rw-r--r--system/libraries/Migration.php336
1 files changed, 0 insertions, 336 deletions
diff --git a/system/libraries/Migration.php b/system/libraries/Migration.php
deleted file mode 100644
index 73c55c346..000000000
--- a/system/libraries/Migration.php
+++ /dev/null
@@ -1,336 +0,0 @@
-<?php defined('BASEPATH') OR exit('No direct script access allowed');
-/**
- * CodeIgniter
- *
- * An open source application development framework for PHP 5.1.6 or newer
- *
- * @package CodeIgniter
- * @author EllisLab Dev Team
- * @copyright Copyright (c) 2006 - 2011, EllisLab, Inc.
- * @license http://codeigniter.com/user_guide/license.html
- * @link http://codeigniter.com
- * @since Version 1.0
- * @filesource
- */
-
-// ------------------------------------------------------------------------
-
-/**
- * Migration Class
- *
- * All migrations should implement this, forces up() and down() and gives
- * access to the CI super-global.
- *
- * @package CodeIgniter
- * @subpackage Libraries
- * @category Libraries
- * @author Reactor Engineers
- * @link
- */
-class CI_Migration {
-
- private $_migration_enabled = FALSE;
- private $_migration_path = NULL;
- private $_migration_version = 0;
-
- public $error = '';
-
- function __construct($config = array())
- {
- # Only run this constructor on main library load
- if (get_parent_class($this) !== FALSE)
- {
- return;
- }
-
- foreach ($config as $key => $val)
- {
- $this->{'_' . $key} = $val;
- }
-
- log_message('debug', 'Migrations class initialized');
-
- // Are they trying to use migrations while it is disabled?
- if ($this->_migration_enabled !== TRUE)
- {
- show_error('Migrations has been loaded but is disabled or set up incorrectly.');
- }
-
- // If not set, set it
- $this->_migration_path == '' OR $this->_migration_path = APPPATH . 'migrations/';
-
- // Add trailing slash if not set
- $this->_migration_path = rtrim($this->_migration_path, '/').'/';
-
- // They'll probably be using dbforge
- $this->load->dbforge();
-
- // If the migrations table is missing, make it
- if ( ! $this->db->table_exists('migrations'))
- {
- $this->dbforge->add_field(array(
- 'version' => array('type' => 'INT', 'constraint' => 3),
- ));
-
- $this->dbforge->create_table('migrations', TRUE);
-
- $this->db->insert('migrations', array('version' => 0));
- }
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Migrate to a schema version
- *
- * Calls each migration step required to get to the schema version of
- * choice
- *
- * @access public
- * @param $version integer Target schema version
- * @return mixed TRUE if already latest, FALSE if failed, int if upgraded
- */
- function version($target_version)
- {
- $start = $current_version = $this->_get_version();
- $stop = $target_version;
-
- if ($target_version > $current_version)
- {
- // Moving Up
- ++$start;
- ++$stop;
- $step = 1;
- }
-
- else
- {
- // Moving Down
- $step = -1;
- }
-
- $method = $step === 1 ? 'up' : 'down';
- $migrations = array();
-
- // We now prepare to actually DO the migrations
- // But first let's make sure that everything is the way it should be
- for ($i = $start; $i != $stop; $i += $step)
- {
- $f = glob(sprintf($this->_migration_path . '%03d_*.php', $i));
-
- // Only one migration per step is permitted
- if (count($f) > 1)
- {
- $this->error = sprintf($this->lang->line('multiple_migration_version'), $i);
- return FALSE;
- }
-
- // Migration step not found
- if (count($f) == 0)
- {
- // If trying to migrate up to a version greater than the last
- // existing one, migrate to the last one.
- if ($step == 1)
- {
- break;
- }
-
- // If trying to migrate down but we're missing a step,
- // something must definitely be wrong.
- $this->error = sprintf($this->lang->line('migration_not_found'), $i);
- return FALSE;
- }
-
- $file = basename($f[0]);
- $name = basename($f[0], '.php');
-
- // Filename validations
- if (preg_match('/^\d{3}_(\w+)$/', $name, $match))
- {
- $match[1] = strtolower($match[1]);
-
- // Cannot repeat a migration at different steps
- if (in_array($match[1], $migrations))
- {
- $this->error = sprintf($this->lang->line('multiple_migrations_name'), $match[1]);
- return FALSE;
- }
-
- include $f[0];
- $class = 'Migration_' . ucfirst($match[1]);
-
- if ( ! class_exists($class))
- {
- $this->error = sprintf($this->lang->line('migration_class_doesnt_exist'), $class);
- return FALSE;
- }
-
- if ( ! is_callable(array($class, 'up')) || ! is_callable(array($class, 'down')))
- {
- $this->error = sprintf($this->lang->line('wrong_migration_interface'), $class);
- return FALSE;
- }
-
- $migrations[] = $match[1];
- }
- else
- {
- $this->error = sprintf($this->lang->line('invalid_migration_filename'), $file);
- return FALSE;
- }
- }
-
- $this->log('Current schema version: ' . $current_version);
-
- $version = $i + ($step == 1 ? -1 : 0);
-
- // If there is nothing to do so quit
- if ($migrations === array())
- {
- return TRUE;
- }
-
- $this->log('Moving ' . $method . ' to version ' . $version);
-
- // Loop through the migrations
- foreach ($migrations AS $migration)
- {
- // Run the migration class
- $class = 'Migration_' . ucfirst(strtolower($migration));
- call_user_func(array(new $class, $method));
-
- $current_version += $step;
- $this->_update_version($current_version);
- }
-
- $this->log('All done. Schema is at version '.$current_version);
-
- return $current_version;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Set's the schema to the latest migration
- *
- * @access public
- * @return mixed true if already latest, false if failed, int if upgraded
- */
- public function latest()
- {
- if ( ! $migrations = $this->find_migrations())
- {
- throw new Exception('no_migrations_found');
- return false;
- }
-
- $last_migration = basename(end($migrations));
-
- // Calculate the last migration step from existing migration
- // filenames and procceed to the standard version migration
- $last_version = intval(substr($last_migration, 0, 3));
- return $this->version($last_version);
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Set's the schema to the migration version set in config
- *
- * @access public
- * @return mixed true if already current, false if failed, int if upgraded
- */
- public function current()
- {
- $version = $this->_migration_version;
- return $this->version($version);
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Set's the schema to the latest migration
- *
- * @access public
- * @return mixed true if already latest, false if failed, int if upgraded
- */
-
- protected static function find_migrations()
- {
- // Load all *_*.php files in the migrations path
- $files = glob($this->_migration_path . '*_*.php');
- $file_count = count($files);
-
- for ($i = 0; $i < $file_count; $i++)
- {
- // Mark wrongly formatted files as false for later filtering
- $name = basename($files[$i], '.php');
- if ( ! preg_match('/^\d{3}_(\w+)$/', $name))
- {
- $files[$i] = FALSE;
- }
- }
-
- sort($files);
-
- return $files;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Retrieves current schema version
- *
- * @access private
- * @return integer Current Schema version
- */
- private function _get_version()
- {
- $row = $this->db->get('migrations')->row();
- return $row ? $row->version : 0;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Stores the current schema version
- *
- * @access private
- * @param $migrations integer Schema version reached
- * @return void Outputs a report of the migration
- */
- private function _update_version($migrations)
- {
- return $this->db->update('migrations', array(
- 'version' => $migrations
- ));
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Stores the current schema version
- *
- * @access private
- * @param $migrations integer Schema version reached
- * @return void Outputs a report of the migration
- */
- private function log($text)
- {
- echo $text.'<br/>';
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Enable the use of CI super-global
- *
- * @access public
- * @param $var
- * @return mixed
- */
- public function __get($var)
- {
- return get_instance()->$var;
- }
-} \ No newline at end of file