"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.searchItems = exports.defaultGetTitle = void 0;
var _blockEditor = require("@wordpress/block-editor");
var _lockUnlock = require("../../lock-unlock");
var _constants = require("../../utils/constants");
/**
 * WordPress dependencies
 */

/**
 * Internal dependencies
 */

const {
  extractWords,
  getNormalizedSearchTerms,
  normalizeString
} = (0, _lockUnlock.unlock)(_blockEditor.privateApis);

/**
 * Internal dependencies
 */

// Default search helpers.
const defaultGetName = item => {
  if (item.type === _constants.PATTERN_TYPES.user) {
    return item.slug;
  }
  if (item.type === _constants.TEMPLATE_PART_POST_TYPE) {
    return '';
  }
  return item.name || '';
};
const defaultGetTitle = item => {
  if (typeof item.title === 'string') {
    return item.title;
  }
  if (item.title && item.title.rendered) {
    return item.title.rendered;
  }
  if (item.title && item.title.raw) {
    return item.title.raw;
  }
  return '';
};
exports.defaultGetTitle = defaultGetTitle;
const defaultGetDescription = item => {
  if (item.type === _constants.PATTERN_TYPES.user) {
    return item.excerpt.raw;
  }
  return item.description || '';
};
const defaultGetKeywords = item => item.keywords || [];
const defaultHasCategory = () => false;
const removeMatchingTerms = (unmatchedTerms, unprocessedTerms) => {
  return unmatchedTerms.filter(term => !getNormalizedSearchTerms(unprocessedTerms).some(unprocessedTerm => unprocessedTerm.includes(term)));
};

/**
 * Filters an item list given a search term.
 *
 * @param {Array}  items       Item list
 * @param {string} searchInput Search input.
 * @param {Object} config      Search Config.
 *
 * @return {Array} Filtered item list.
 */
const searchItems = (items = [], searchInput = '', config = {}) => {
  const normalizedSearchTerms = getNormalizedSearchTerms(searchInput);

  // Filter patterns by category: the default category indicates that all patterns will be shown.
  const onlyFilterByCategory = config.categoryId !== _constants.PATTERN_DEFAULT_CATEGORY && !normalizedSearchTerms.length;
  const searchRankConfig = {
    ...config,
    onlyFilterByCategory
  };

  // If we aren't filtering on search terms, matching on category is satisfactory.
  // If we are, then we need more than a category match.
  const threshold = onlyFilterByCategory ? 0 : 1;
  const rankedItems = items.map(item => {
    return [item, getItemSearchRank(item, searchInput, searchRankConfig)];
  }).filter(([, rank]) => rank > threshold);

  // If we didn't have terms to search on, there's no point sorting.
  if (normalizedSearchTerms.length === 0) {
    return rankedItems.map(([item]) => item);
  }
  rankedItems.sort(([, rank1], [, rank2]) => rank2 - rank1);
  return rankedItems.map(([item]) => item);
};

/**
 * Get the search rank for a given item and a specific search term.
 * The better the match, the higher the rank.
 * If the rank equals 0, it should be excluded from the results.
 *
 * @param {Object} item       Item to filter.
 * @param {string} searchTerm Search term.
 * @param {Object} config     Search Config.
 *
 * @return {number} Search Rank.
 */
exports.searchItems = searchItems;
function getItemSearchRank(item, searchTerm, config) {
  const {
    categoryId,
    getName = defaultGetName,
    getTitle = defaultGetTitle,
    getDescription = defaultGetDescription,
    getKeywords = defaultGetKeywords,
    hasCategory = defaultHasCategory,
    onlyFilterByCategory
  } = config;
  let rank = categoryId === _constants.PATTERN_DEFAULT_CATEGORY || categoryId === _constants.TEMPLATE_PART_ALL_AREAS_CATEGORY || categoryId === _constants.PATTERN_USER_CATEGORY && item.type === _constants.PATTERN_TYPES.user || hasCategory(item, categoryId) ? 1 : 0;

  // If an item doesn't belong to the current category or we don't have
  // search terms to filter by, return the initial rank value.
  if (!rank || onlyFilterByCategory) {
    return rank;
  }
  const name = getName(item);
  const title = getTitle(item);
  const description = getDescription(item);
  const keywords = getKeywords(item);
  const normalizedSearchInput = normalizeString(searchTerm);
  const normalizedTitle = normalizeString(title);

  // Prefers exact matches
  // Then prefers if the beginning of the title matches the search term
  // name, keywords, description matches come later.
  if (normalizedSearchInput === normalizedTitle) {
    rank += 30;
  } else if (normalizedTitle.startsWith(normalizedSearchInput)) {
    rank += 20;
  } else {
    const terms = [name, title, description, ...keywords].join(' ');
    const normalizedSearchTerms = extractWords(normalizedSearchInput);
    const unmatchedTerms = removeMatchingTerms(normalizedSearchTerms, terms);
    if (unmatchedTerms.length === 0) {
      rank += 10;
    }
  }
  return rank;
}
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