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<?php
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// $Id:$
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/**
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* Implementation of hook_menu().
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*/
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function mtk_menu($may_cache) {
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$items = array();
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if ($may_cache) {
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$admin_access = user_access('administer site settings');
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$items[] = array(
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'path' => 'admin/mtk',
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'title' => t('Content migration'),
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'description' => t('Migration Toolkit Content migration.'),
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'callback' => 'mtk_admin_overview',
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'access' => $admin_access,
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);
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$items[] = array(
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'path' => 'admin/mtk/dashboard',
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'title' => t('Migration toolkit dashboard'),
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'description' => t('Execute migration increments and roll back data.'),
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'callback' => 'drupal_get_form',
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'callback arguments' => array('mtk_dashboard'),
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'access' => $admin_access,
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);
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$items[] = array(
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'path' => 'admin/mtk/rollback',
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'title' => t('Rollback'),
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'description' => t('Content migration.'),
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'callback' => 'mtk_rollback_page',
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'access' => $admin_access,
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'type' => MENU_CALLBACK
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);
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}
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return $items;
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}
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/**
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* Menu page callback.
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*/
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function mtk_admin_overview() {
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$menu = menu_get_item(NULL, 'admin/mtk');
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$content = system_admin_menu_block($menu);
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$output = theme('admin_block_content', $content);
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return $output;
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}
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/**
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* Migration dashboard. Central point of action for user.
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*/
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function mtk_dashboard() {
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// Get past migrations
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$migration_history = variable_get('mtk_migration_history', array());
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$done = array();
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foreach ($migration_history as $time => $migrations) {
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$items = array();
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foreach ($migrations as $callback) {
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$done[] = $callback;
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$items[] = mtk_get_migration_name($callback);
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}
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$rows[] = array(
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format_interval(time() - $time) .' '. t('ago'),
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implode(', ', $items),
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l(t('Roll back'), 'admin/mtk/rollback/'. $time, array(), 'destination='. $_GET['q']),
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);
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}
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if ($rows) {
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$form['migrated'] = array(
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'#type' => 'fieldset',
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'#title' => t('Executed migrations'),
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'#description' => theme('table', $header, $rows),
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);
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}
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// Build available migration options.
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// @todo: Respect weights, add dependency definitions.
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$migrations = mtk_get_migrations_list();
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if (is_array($migrations)) {
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foreach ($migrations as $callback => $name) {
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$count++;
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// Check if migrated.
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if (in_array($callback, $done)) {
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$migrated[$callback] = $count .') '. $name;
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}
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else {
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$options[$callback] = $count .') '. $name;
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}
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}
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$form['migrations'] = array(
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'#type' => 'fieldset',
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'#title' => t('Available migrations'),
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'#tree' => FALSE,
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);
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$form['migrations']['migrations'] = array(
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'#type' => 'checkboxes',
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'#options' => $options,
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);
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}
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else {
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drupal_set_message(t('No migrations defined.'));
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}
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// Build watchdog link.
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// @todo: Watchdog (2 notices, 3 errors since first migration)
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$rows = array(
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array(
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l(t('Content'), 'admin/content/node'),
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l(t('Users'), 'admin/user/user'),
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l(t('Watchdog'), 'admin/logs/watchdog'),
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),
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);
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$form['watchdog'] = array(
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'#type' => 'fieldset',
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'#title' => t('Links'),
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'#description' => theme('table', NULL, $rows) .'<br />',
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);
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$form['submit'] = array(
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'#type' => 'submit',
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'#value' => t('Migrate'),
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);
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return $form;
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}
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/**
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* Submit function for dashboard.
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*/
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function mtk_dashboard_submit($form_id, $form_values) {
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if ($form_values['migrations'] && count($form_values['migrations'] > 1)) {
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foreach ($form_values['migrations'] as $callback => $selected) {
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if ($selected) {
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$callbacks[] = $callback;
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}
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}
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if ($callbacks) {
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mtk_migrate($callbacks);
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}
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}
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}
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/**
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* Rollback confirmation form.
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*/
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function mtk_rollback_page($time) {
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mtk_rollback($time);
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drupal_goto($_GET['destination']);
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}
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/**
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* Do migration.
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*/
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function mtk_migrate($callbacks) {
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// Include migration tools.
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mtk_include();
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$backup_time = mtk_snapshot();
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// Do migrations.
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foreach ($callbacks as $callback) {
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call_user_func($callback);
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// @todo: seperate migration backups from migration calls so that we
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// can do incremental steps on a single migration callback and no backups for
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// dry run migrations.
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$migrations[$callback] = $callback;
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}
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if ($migrations) {
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// Store in history variable.
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$migration_history = variable_get('mtk_migration_history', array());
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$migration_history[$backup_time] = $migrations;
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variable_set('mtk_migration_history', $migration_history);
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}
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}
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/**
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* Rolls back to latest snapshot.
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*
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* @param unknown_type $backup_time
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*/
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function mtk_rollback($backup_time) {
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// @todo: roll back.
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if (demo_reset(_mtk_create_filename($backup_time))) {
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$migration_history = variable_get('mtk_migration_history', array());
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foreach ($migration_history as $time => $migrations) {
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if ($time >= $backup_time) {
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unset($migration_history[$time]);
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}
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}
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variable_set('mtk_migration_history', $migration_history);
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drupal_set_message(t('Roll back to before !ago ago.', array('!ago' => format_interval(time() - $backup_time))));
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}
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}
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/**
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* Take a snapshot of current DB.
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* @return: Unix time of snapshot, serves as identifier.
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*/
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function mtk_snapshot() {
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$time = time();
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mtk_demo_dump(_mtk_create_filename($time));
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return $time;
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}
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/**
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* This one should actually live in the demo module.
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* Code mostly ripped from demp_dump_submit().
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*
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* @param string $filename
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*/
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function mtk_demo_dump($filename) {
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global $db_type;
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// Write .info file
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$values['filename'] = $filename;
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$values['description'] = t('MTK Backup');
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$info = demo_set_info($values);
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if (!$info) {
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return false;
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}
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// Include database specific functions
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switch ($db_type) {
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case 'mysqli':
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$engine = 'mysql';
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break;
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default:
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$engine = $db_type;
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break;
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}
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require_once drupal_get_path('module', 'demo') ."/database_{$engine}_dump.inc";
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// Increase PHP's max_execution_time for large dumps.
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@set_time_limit(600);
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// Perform dump
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$fileconfig = demo_get_fileconfig($info['filename']);
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$exclude = array('{cache}', '{cache_content}', '{cache_filter}', '{cache_menu}', '{cache_page}', '{cache_views}', '{panels_object_cache}', '{watchdog}');
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$exclude = array_map('db_prefix_tables', $exclude);
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demo_dump_db($fileconfig['sqlfile'], $exclude);
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}
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/**
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* Retrieve a list of available migrations
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*
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* @return unknown
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*/
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function mtk_get_migrations_list() {
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$migrations = module_invoke_all('mtk');
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foreach ($migrations as $migration) {
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$migration_list[$migration['callback']] = $migration['name'];
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}
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return $migration_list;
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}
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/**
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* Include libraries.
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*/
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function mtk_include() {
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static $loaded = FALSE;
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if (!$loaded) {
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$module_path = drupal_get_path('module', 'mtk') .'/';
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foreach (array('crud', 'helper') as $sub_dir) {
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$path = $module_path . $sub_dir;
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$files = drupal_system_listing('.*\.inc$', $path, 'name', 0);
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foreach($files as $file) {
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require_once("./$file->filename");
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}
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}
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}
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$loaded = TRUE;
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}
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/**
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* Retrieve the human readable name for a given callback.
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*/
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function mtk_get_migration_name($callback) {
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if ($migration_list = mtk_get_migrations_list()) {
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return $migration_list[$callback];
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}
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}
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/**
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* Creates a file db dump file name.
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*/
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function _mtk_create_filename($time) {
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return 'backup-'. gmdate('Y-m-d\TH-i-s', $time);
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}
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