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<?php
/**
* Database Upgrades
*
* It is sometimes necessary to upgrade the database (posts and settings) after updating the plugin.
*
* @package Church_Theme_Content
* @subpackage Admin
* @copyright Copyright (c) 2014 - 2016 churchthemes.com
* @link https://github.com/churchthemes/church-theme-content
* @license GPLv2 or later
* @since 1.2
*/
// No direct access
if ( ! defined( 'ABSPATH' ) ) exit;
/*************************************************
* VERSIONS
*************************************************/
/**
* Upgrade Versions
*
* These versions require database upgrades.
* Functions with names corresponding to versions are triggered when updating the plugin.
* For example, updating from 1.2 to 1.3 with 1.3 in the array executes ctc_upgrade_1_3.
*
* @since 1.2
* @global object $wpdb
*/
function ctc_upgrade_versions() {
// Versions requiring database upgrade, in sequential order
// Add a function below that corresponds to this version
$upgrade_versions = array(
// When modify database in upgrade routine, also consider ctc_after_import() in admin/import.php
'1.2', // hidden time fields
);
// Ensure they are ordered sequentially, oldest to newest
// Database changes likely build upon each other
usort( $upgrade_versions, 'version_compare' );
return $upgrade_versions;
}
/**
* Upgrade to 1.2
*
* Version 1.2 introduced new time fields (visible and hidden).
* This loops through all event posts and sets defaults.
*/
function ctc_upgrade_1_2() {
// This will update hidden event DATETIME fields for easier sorting
// This function can be run during any database upgrade
// It sets defaults for fields not existing at initial release
ctc_set_events_defaults();
}
/*************************************************
* ACTIONS
*************************************************/
/**
* Check Upgrade Necessity
*
* It may be necessary to upgrade the database from version to version.
* This will check if upgrade(s) are necessary on every admin page load.
*
* @since 1.2
* @global object $wpdb
*/
function ctc_check_upgrade() {
global $wpdb;
// Make sure runs only on admin end
if ( ! is_admin() ) {
return;
}
// Version of plugin used before updating
$old_version = get_option( 'ctc_version' );
// No old version value found
// This could mean a first-time install was made (no upgrades necessary)
// Or, a plugin update from a version earlier than 1.2 was done (database upgrade necessary)
if ( ! $old_version ) {
// Are there posts using this plugin's custom post types in the database?
// If so, the plugin must have just been updated from a version earlier than 1.2
// In this case, a database upgrade is necessary
// Note: This check will only be run once ever (after installation or first upgrade to 1.2+)
$ctc_post_count = $wpdb->get_var(
$wpdb->prepare(
"
SELECT COUNT( * )
FROM {$wpdb->posts}
WHERE post_type IN( '%s', '%s', '%s', '%s' )
",
'ctc_sermon', // these four post types existed before 1.2, so no newer ones need to be counted
'ctc_event',
'ctc_person',
'ctc_location'
)
);
if ( $ctc_post_count ) {
$old_version = '1.1.1'; // assume 1.1.1, the last version before database upgrades introduced in 1.2
}
// Otherwise, treat this as a first-time plugin installation
// In this case, no database upgrade is necessary because there is no data (set current version)
else {
$old_version = CTC_VERSION;
}
// Set the initial version number
update_option( 'ctc_version', $old_version );
}
// Has plugin just been updated to new version?
// We know it did if old version in database is less than plugin's current version
if ( version_compare( CTC_VERSION, $old_version, '>' ) ) {
ctc_run_upgrade( $old_version );
}
}
add_action( 'admin_init', 'ctc_check_upgrade' );
/**
* Run Necessary Upgrades
*
* Sequentially execute upgrade functions for one or more versions.
*
* @since 1.2
* @param string $old_version Version used before plugin update
*/
function ctc_run_upgrade( $old_version ) {
// Ensure the upgrade routine finishes
ignore_user_abort( true );
if ( ctc_function_available( 'set_time_limit' ) && ! ini_get( 'safe_mode' ) ) { // check to avoid warnings
set_time_limit( 0 );
}
// Get versions requiring database upgrade, in sequential order
$upgrade_versions = ctc_upgrade_versions();
// Sequentially execute upgrade functions for older versions
foreach ( $upgrade_versions as $upgrade_version ) {
// Do not run version's upgrade if it is older than version in database
// The upgrade should have already run for that version, since it is in the database
if ( version_compare( $old_version, $upgrade_version, '>=' ) ) {
continue;
}
// Do not run version's upgrade if it is newer than new plugin version
// This would only happen plugin author specifies upgrade function with wrong number
if ( version_compare( $upgrade_version, CTC_VERSION, '>' ) ) {
continue;
}
// Debug (also comment out update_option() for new version below)
//echo "<br>New Version: " . CTC_VERSION . ", Old Version: $old_version, Upgrade Function: $upgrade_version";
// Execute version's upgrade function
// Example: 1.5.2 will execute ctc_upgrade_1_5_2()
$upgrade_version_clean = str_replace( '.', '_', $upgrade_version );
$function = 'ctc_upgrade_' . $upgrade_version_clean;
if ( function_exists( $function ) ) {
call_user_func( $function );
}
}
// Always flush rewrite rules in case post types or taxonomies added
flush_rewrite_rules();
// Always update version number in the database, even if no upgrade function is run
update_option( 'ctc_version', CTC_VERSION );
}