<?php

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

/**
 * Implements hook_schema().
 */
function search_schema() {
  $schema['search_dataset'] = [
    'description' => 'Stores items that will be searched.',
    'fields' => [
      'sid' => [
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
        'description' => 'Search item ID, e.g. node ID for nodes.',
      ],
      'langcode' => [
        'type' => 'varchar_ascii',
        'length' => '12',
        'not null' => TRUE,
        'description' => 'The {languages}.langcode of the item variant.',
        'default' => '',
      ],
      'type' => [
        'type' => 'varchar_ascii',
        'length' => 64,
        'not null' => TRUE,
        'description' => 'Type of item, e.g. node.',
      ],
      'data' => [
        'type' => 'text',
        'not null' => TRUE,
        'size' => 'big',
        'description' => 'List of space-separated words from the item.',
      ],
      'reindex' => [
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
        'description' => 'Set to force node reindexing.',
      ],
    ],
    'primary key' => ['sid', 'langcode', 'type'],
  ];

  $schema['search_index'] = [
    'description' => 'Stores the search index, associating words, items and scores.',
    'fields' => [
      'word' => [
        'type' => 'varchar',
        'length' => 50,
        'not null' => TRUE,
        'default' => '',
        'description' => 'The {search_total}.word that is associated with the search item.',
      ],
      'sid' => [
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
        'description' => 'The {search_dataset}.sid of the searchable item to which the word belongs.',
      ],
      'langcode' => [
        'type' => 'varchar_ascii',
        'length' => '12',
        'not null' => TRUE,
        'description' => 'The {languages}.langcode of the item variant.',
        'default' => '',
      ],
      'type' => [
        'type' => 'varchar_ascii',
        'length' => 64,
        'not null' => TRUE,
        'description' => 'The {search_dataset}.type of the searchable item to which the word belongs.',
      ],
      'score' => [
        'type' => 'float',
        'not null' => FALSE,
        'description' => 'The numeric score of the word, higher being more important.',
      ],
    ],
    'indexes' => [
      'sid_type' => ['sid', 'langcode', 'type'],
    ],
    'foreign keys' => [
      'search_dataset' => [
        'table' => 'search_dataset',
        'columns' => [
          'sid' => 'sid',
          'langcode' => 'langcode',
          'type' => 'type',
        ],
      ],
    ],
    'primary key' => ['word', 'sid', 'langcode', 'type'],
  ];

  $schema['search_total'] = [
    'description' => 'Stores search totals for words.',
    'fields' => [
      'word' => [
        'description' => 'Primary Key: Unique word in the search index.',
        'type' => 'varchar',
        'length' => 50,
        'not null' => TRUE,
        'default' => '',
      ],
      'count' => [
        'description' => "The count of the word in the index using Zipf's law to equalize the probability distribution.",
        'type' => 'float',
        'not null' => FALSE,
      ],
    ],
    'primary key' => ['word'],
  ];

  return $schema;
}

/**
 * Implements hook_requirements().
 *
 * For the Status Report, return information about search index status.
 */
function search_requirements($phase) {
  $requirements = [];

  if ($phase == 'runtime') {
    $remaining = 0;
    $total = 0;
    $search_page_repository = \Drupal::service('search.search_page_repository');
    foreach ($search_page_repository->getIndexableSearchPages() as $entity) {
      $status = $entity->getPlugin()->indexStatus();
      $remaining += $status['remaining'];
      $total += $status['total'];
    }

    $done = $total - $remaining;
    // Use floor() to calculate the percentage, so if it is not quite 100%, it
    // will show as 99%, to indicate "almost done".
    $percent = ($total > 0 ? floor(100 * $done / $total) : 100);
    $requirements['search_status'] = [
      'title' => t('Search index progress'),
      'value' => t('@percent% (@remaining remaining)', ['@percent' => $percent, '@remaining' => $remaining]),
      'severity' => REQUIREMENT_INFO,
    ];
  }

  return $requirements;
}