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<?php |
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/** |
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* Version management for database migrations. |
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* |
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* Database changes require special care: |
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* - the model has to be adjusted for users installing the plugin |
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* - the current setup has to be migrated for current users |
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* |
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* These migrations are a way to handle current users. They do *not* |
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* run on plugin activation. |
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* |
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* Pattern: |
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* |
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* - increment \PodloveSubscribeButton\DATABASE_VERSION constant by 1, e.g. |
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* ```php |
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* define( __NAMESPACE__ . '\DATABASE_VERSION', 2 ); |
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* ``` |
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* |
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* - add a case in `\PodloveSubscribeButton\run_migrations_for_version`, e.g. |
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* ```php |
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* function run_migrations_for_version( $version ) { |
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* global $wpdb; |
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* switch ( $version ) { |
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* case 2: |
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* $wbdb-> // run sql or whatever |
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* break; |
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* } |
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* } |
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* ``` |
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* |
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* Feel free to move the migration code into a separate function if it's |
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* rather complex. |
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* |
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* - adjust the main model / setup process so new users installing the plugin |
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* will have these changes too |
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* |
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* - Test the migrations! :) |
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*/ |
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namespace PodloveSubscribeButton; |
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use \PodloveSubscribeButton\Model; |
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define( __NAMESPACE__ . '\DATABASE_VERSION', 2 ); |
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add_action( 'admin_init', '\PodloveSubscribeButton\maybe_run_database_migrations' ); |
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add_action( 'admin_init', '\PodloveSubscribeButton\run_database_migrations', 5 ); |
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function maybe_run_database_migrations() { |
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$database_version = get_option('podlove_subscribe_button_plugin_database_version'); |
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if ( $database_version === false ) { |
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// plugin has just been installed or Plugin Version < 1.3 |
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update_option( 'podlove_subscribe_button_plugin_database_version', DATABASE_VERSION ); |
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} |
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} |
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function run_database_migrations() { |
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if (get_option('podlove_subscribe_button_plugin_database_version') >= DATABASE_VERSION) |
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return; |
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if (is_multisite()) { |
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set_time_limit(0); // may take a while, depending on network size |
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\PodloveSubscribeButton\for_every_podcast_blog(function() { migrate_for_current_blog(); }); |
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} else { |
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migrate_for_current_blog(); |
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} |
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if (isset($_REQUEST['_wp_http_referer']) && $_REQUEST['_wp_http_referer']) { |
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wp_redirect($_REQUEST['_wp_http_referer']); |
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exit; |
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} |
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} |
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function migrate_for_current_blog() { |
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$database_version = get_option('podlove_subscribe_button_plugin_database_version'); |
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for ($i = $database_version+1; $i <= DATABASE_VERSION; $i++) { |
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\PodloveSubscribeButton\run_migrations_for_version($i); |
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update_option('podlove_subscribe_button_plugin_database_version', $i); |
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} |
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} |
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/** |
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* Find and run migration for given version number. |
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* |
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* @todo move migrations into separate files |
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* |
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* @param int $version |
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*/ |
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function run_migrations_for_version( $version ) { |
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global $wpdb; |
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switch ( $version ) {} |
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} |
cfoellmann /
podlove-subscribe-button-wp-plugin
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