bb-drummer / node-patternlibrary

lib/patternlibrary/build-search.js

var fs = require('fs');
var mkdirp = require('mkdirp');
var path = require('path');
var sanatizeType = require('../util/sanatize-patterntype');

/**
 * Generates a search file from the current tree of processed pages.
 * @param {string} outFile - Path to write to.
 * @param {function} cb - Callback to run when the search file is written to disk.
 * @todo Make hashes for search result types configurable
 */
module.exports = function(outFile, cb) {
  var tree = this.data.patterns;
  var results = [];

  results = results.concat(this.searchOptions.extra);

  // Each item in the tree is a page
  for (var i in tree) {
    var item = tree[i];
    
    // for now... only add to search if we have a linkable pattern file at hand
    if ( (typeof item.fileName != 'undefined') && (item.fileName != '') ) {
    	
        var link = sanatizeType(path.join(
        		this.options.basepath, 
        		this.options.patternspath, 
        		item.pattern.name, 
        		this.options.pattern.target
        ), true);
        var type = 'page';

        // By default pages are classified as a "page"
        // If it has code associated with it, then it's a "component" instead.
        if (keysInObject(item, Object.keys(this.adapters))) {
          type = 'component';
        }

        // Check for special page types
        for (var t in this.searchOptions.pageTypes) {
          var func = this.searchOptions.pageTypes[t];
          if (func(item)) {
            type = t;
          }
        }

        // Add the page itself as a search result
        results.push({
          type: type,
          name: item.title,
          description: item.description,
          link: link,
          tags: item.tags || []
        });

        // Run search builders for each adapter
        for (var a in this.adapters) {
          if (this.adapters[a].search && item[a]) {
            results = results.concat(this.adapters[a].search(item[a], link));
          }
        }
        
    }
  }

  // Re-order search results based on search config
  results.sort(function(a, b) {
    return this.searchOptions.sort.indexOf(a.type) - this.searchOptions.sort.indexOf(b.type);
  }.bind(this));

  // Write the finished results to disk
  mkdirp(path.dirname(outFile), function(err) {
    if (err) throw err;
    fs.writeFile(outFile, JSON.stringify(results, null, '  '), cb);

The variable results is changed as part of the for-each loop for example by results.concat(this.searchOptions.extra) on line 16. Only the value of the last iteration will be visible in this function if it is called after the loop.

  });
}

/**
 * Determines if any key in an array exists on an object.
 * @param {object} obj - Object to check for keys.
 * @param {array} keys - Keys to check.
 * @returns {boolean} `true` if any key is found on the object, or `false` if not.
 */
function keysInObject(obj, keys) {
  for (var i in keys) {
    if (keys[i] in obj) return true;
  }
  return false;
}