<?php

/**
 * @file
 * Install, update, and uninstall functions for tracker.module.
 */

/**
 * Implements hook_uninstall().
 */
function tracker_uninstall() {
  \Drupal::state()->delete('tracker.index_nid');
}

/**
 * Implements hook_install().
 */
function tracker_install() {
  $max_nid = db_query('SELECT MAX(nid) FROM {node}')->fetchField();
  if ($max_nid != 0) {
    \Drupal::state()->set('tracker.index_nid', $max_nid);
    // To avoid timing out while attempting to do a complete indexing, we
    // simply call our cron job to remove stale records and begin the process.
    tracker_cron();
  }
}

/**
 * Implements hook_schema().
 */
function tracker_schema() {
  $schema['tracker_node'] = [
    'description' => 'Tracks when nodes were last changed or commented on.',
    'fields' => [
      'nid' => [
        'description' => 'The {node}.nid this record tracks.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
      ],
      'published' => [
        'description' => 'Boolean indicating whether the node is published.',
        'type' => 'int',
        'not null' => FALSE,
        'default' => 0,
        'size' => 'tiny',
      ],
      'changed' => [
        'description' => 'The Unix timestamp when the node was most recently saved or commented on.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
      ],
    ],
    'indexes' => [
      'tracker' => ['published', 'changed'],
    ],
    'primary key' => ['nid'],
    'foreign keys' => [
      'tracked_node' => [
        'table' => 'node',
        'columns' => ['nid' => 'nid'],
      ],
    ],
  ];

  $schema['tracker_user'] = [
    'description' => 'Tracks when nodes were last changed or commented on, for each user that authored the node or one of its comments.',
    'fields' => [
      'nid' => [
        'description' => 'The {node}.nid this record tracks.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
      ],
      'uid' => [
        'description' => 'The {users}.uid of the node author or commenter.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
      ],
      'published' => [
        'description' => 'Boolean indicating whether the node is published.',
        'type' => 'int',
        'not null' => FALSE,
        'default' => 0,
        'size' => 'tiny',
      ],
      'changed' => [
        'description' => 'The Unix timestamp when the node was most recently saved or commented on.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
      ],
    ],
    'indexes' => [
      'tracker' => ['uid', 'published', 'changed'],
    ],
    'primary key' => ['nid', 'uid'],
    'foreign keys' => [
      'tracked_node' => [
        'table' => 'node',
        'columns' => ['nid' => 'nid'],
      ],
      'tracked_user' => [
        'table' => 'users',
        'columns' => ['uid' => 'uid'],
      ],
    ],
  ];

  return $schema;
}