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+<?php
+
+/**
+ * @file
+ * Install, update, and uninstall functions for the Update Manager module.
+ */
+
+/**
+ * Implements hook_requirements().
+ *
+ * @return
+ * An array describing the status of the site regarding available updates. If
+ * there is no update data, only one record will be returned, indicating that
+ * the status of core can't be determined. If data is available, there will be
+ * two records: one for core, and another for all of contrib (assuming there
+ * are any contributed modules or themes enabled on the site). In addition to
+ * the fields expected by hook_requirements ('value', 'severity', and
+ * optionally 'description'), this array will contain a 'reason' attribute,
+ * which is an integer constant to indicate why the given status is being
+ * returned (UPDATE_NOT_SECURE, UPDATE_NOT_CURRENT, or UPDATE_UNKNOWN). This
+ * is used for generating the appropriate e-mail notification messages during
+ * update_cron(), and might be useful for other modules that invoke
+ * update_requirements() to find out if the site is up to date or not.
+ *
+ * @see _update_message_text()
+ * @see _update_cron_notify()
+ */
+function update_requirements($phase) {
+ $requirements = array();
+ if ($phase == 'runtime') {
+ if ($available = update_get_available(FALSE)) {
+ module_load_include('inc', 'update', 'update.compare');
+ $data = update_calculate_project_data($available);
+ // First, populate the requirements for core:
+ $requirements['update_core'] = _update_requirement_check($data['drupal'], 'core');
+ // We don't want to check drupal a second time.
+ unset($data['drupal']);
+ if (!empty($data)) {
+ // Now, sort our $data array based on each project's status. The
+ // status constants are numbered in the right order of precedence, so
+ // we just need to make sure the projects are sorted in ascending
+ // order of status, and we can look at the first project we find.
+ uasort($data, '_update_project_status_sort');
+ $first_project = reset($data);
+ $requirements['update_contrib'] = _update_requirement_check($first_project, 'contrib');
+ }
+ }
+ else {
+ $requirements['update_core']['title'] = t('Drupal core update status');
+ $requirements['update_core']['value'] = t('No update data available');
+ $requirements['update_core']['severity'] = REQUIREMENT_WARNING;
+ $requirements['update_core']['reason'] = UPDATE_UNKNOWN;
+ $requirements['update_core']['description'] = _update_no_data();
+ }
+ }
+ return $requirements;
+}
+
+/**
+ * Implements hook_schema().
+ */
+function update_schema() {
+ $schema['cache_update'] = drupal_get_schema_unprocessed('system', 'cache');
+ $schema['cache_update']['description'] = 'Cache table for the Update module to store information about available releases, fetched from central server.';
+ return $schema;
+}
+
+/**
+ * Implements hook_install().
+ */
+function update_install() {
+ $queue = DrupalQueue::get('update_fetch_tasks', TRUE);
+ $queue->createQueue();
+}
+
+/**
+ * Implements hook_uninstall().
+ */
+function update_uninstall() {
+ // Clear any variables that might be in use
+ $variables = array(
+ 'update_check_frequency',
+ 'update_fetch_url',
+ 'update_last_check',
+ 'update_last_email_notification',
+ 'update_notification_threshold',
+ 'update_notify_emails',
+ 'update_max_fetch_attempts',
+ 'update_max_fetch_time',
+ );
+ foreach ($variables as $variable) {
+ variable_del($variable);
+ }
+ $queue = DrupalQueue::get('update_fetch_tasks');
+ $queue->deleteQueue();
+}
+
+/**
+ * Fills in the requirements array.
+ *
+ * This is shared for both core and contrib to generate the right elements in
+ * the array for hook_requirements().
+ *
+ * @param $project
+ * Array of information about the project we're testing as returned by
+ * update_calculate_project_data().
+ * @param $type
+ * What kind of project this is ('core' or 'contrib').
+ *
+ * @return
+ * An array to be included in the nested $requirements array.
+ *
+ * @see hook_requirements()
+ * @see update_requirements()
+ * @see update_calculate_project_data()
+ */
+function _update_requirement_check($project, $type) {
+ $requirement = array();
+ if ($type == 'core') {
+ $requirement['title'] = t('Drupal core update status');
+ }
+ else {
+ $requirement['title'] = t('Module and theme update status');
+ }
+ $status = $project['status'];
+ if ($status != UPDATE_CURRENT) {
+ $requirement['reason'] = $status;
+ $requirement['description'] = _update_message_text($type, $status, TRUE);
+ $requirement['severity'] = REQUIREMENT_ERROR;
+ }
+ switch ($status) {
+ case UPDATE_NOT_SECURE:
+ $requirement_label = t('Not secure!');
+ break;
+ case UPDATE_REVOKED:
+ $requirement_label = t('Revoked!');
+ break;
+ case UPDATE_NOT_SUPPORTED:
+ $requirement_label = t('Unsupported release');
+ break;
+ case UPDATE_NOT_CURRENT:
+ $requirement_label = t('Out of date');
+ $requirement['severity'] = REQUIREMENT_WARNING;
+ break;
+ case UPDATE_UNKNOWN:
+ case UPDATE_NOT_CHECKED:
+ case UPDATE_NOT_FETCHED:
+ $requirement_label = isset($project['reason']) ? $project['reason'] : t('Can not determine status');
+ $requirement['severity'] = REQUIREMENT_WARNING;
+ break;
+ default:
+ $requirement_label = t('Up to date');
+ }
+ if ($status != UPDATE_CURRENT && $type == 'core' && isset($project['recommended'])) {
+ $requirement_label .= ' ' . t('(version @version available)', array('@version' => $project['recommended']));
+ }
+ $requirement['value'] = l($requirement_label, update_manager_access() ? 'admin/reports/updates/update' : 'admin/reports/updates');
+ return $requirement;
+}
+
+/**
+ * @addtogroup updates-6.x-to-7.x
+ * @{
+ */
+
+/**
+ * Create a queue to store tasks for requests to fetch available update data.
+ */
+function update_update_7000() {
+ module_load_include('inc', 'system', 'system.queue');
+ $queue = DrupalQueue::get('update_fetch_tasks');
+ $queue->createQueue();
+}
+
+/**
+ * Recreates cache_update table.
+ *
+ * Converts fields that hold serialized variables from text to blob.
+ * Removes 'headers' column.
+ */
+function update_update_7001() {
+ $schema = system_schema_cache_7054();
+
+ db_drop_table('cache_update');
+ db_create_table('cache_update', $schema);
+}
+
+/**
+ * @} End of "addtogroup updates-6.x-to-7.x".
+ */