97 lines
2.3 KiB
PHP
97 lines
2.3 KiB
PHP
<?php if ( ! defined( 'ABSPATH' ) ) exit;
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require_once( ABSPATH . 'wp-admin/includes/upgrade.php');
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abstract class NF_Abstracts_Migration
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{
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public $table_name = '';
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public $charset_collate = '';
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public $flag = '';
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public function __construct( $table_name, $flag )
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{
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$this->table_name = $table_name;
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}
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public function table_name()
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{
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global $wpdb;
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return $wpdb->prefix . $this->table_name;
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}
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public function charset_collate()
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{
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global $wpdb;
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// If our mysql version is 5.5.3 or higher...
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if ( version_compare( $wpdb->db_version(), '5.5.3', '>=' ) ) {
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// We can use mb4.
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return 'DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci';
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} // Otherwise...
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else {
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// We use standard utf8.
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return 'DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci';
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}
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}
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/**
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* Function to get the column collate for ALTER TABLE statements.
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*
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* @since 3.3.7
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*
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* @return string
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*/
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public function collate()
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{
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global $wpdb;
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// If our mysql version is 5.5.3 or higher...
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if ( version_compare( $wpdb->db_version(), '5.5.3', '>=' ) ) {
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// We can use mb4.
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return 'COLLATE utf8mb4_general_ci';
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} // Otherwise...
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else {
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// We use standard utf8.
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return 'COLLATE utf8_general_ci';
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}
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}
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/**
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* Function to run our stage one db updates.
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*/
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public function _stage_one()
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{
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if ( method_exists( $this, 'do_stage_one' ) ) {
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$this->do_stage_one();
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}
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}
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public function _run()
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{
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// Check the flag
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if( get_option( $this->flag, FALSE ) ) return;
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// Run the migration
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$this->run();
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// Set the Flag
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update_option( $this->flag, TRUE );
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}
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protected abstract function run();
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public function _drop()
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{
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global $wpdb;
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if( ! $this->table_name ) return;
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if( 0 == $wpdb->query( $wpdb->prepare( "SHOW TABLES LIKE '%s'", $this->table_name() ) ) ) return;
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$wpdb->query( "DROP TABLE " . $this->table_name() );
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return $this->drop();
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}
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protected function drop()
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{
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// This section intentionally left blank.
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}
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}
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