SOURCE CODE: UizeSite.Build.FileBuilders.InMemoryExamplesByKeywordLookup (view docs)

/*______________
|       ______  |   U I Z E    J A V A S C R I P T    F R A M E W O R K
|     /      /  |   ---------------------------------------------------
|    /    O /   |    MODULE : UizeSite.Build.FileBuilders.InMemoryExamplesByKeywordLookup Package
|   /    / /    |
|  /    / /  /| |    ONLINE : http://www.uize.com
| /____/ /__/_| | COPYRIGHT : (c)2012-2016 UIZE
|          /___ |   LICENSE : Available under MIT License or GNU General Public License
|_______________|             http://www.uize.com/license.html
*/

/* Module Meta Data
  type: Package
  importance: 5
  codeCompleteness: 100
  docCompleteness: 100
*/

/*?
  Introduction
    The =UizeSite.Build.FileBuilders.InMemoryExamplesByKeywordLookup= module defines a file builder for the in-memory examples-by-keyword lookup for the example pages of the UIZE Web site.

    *DEVELOPERS:* `Chris van Rensburg`

    Functions defined in the file builder are called as instance methods on an instance of a subclass of the =Uize.Services.FileBuilderAdapter= class, so the functions can access instance methods implemented in this class.
*/

Uize.module ({
  name:'UizeSite.Build.FileBuilders.InMemoryExamplesByKeywordLookup',
  builder:function () {
    'use strict';

    return Uize.package ({
      description:'Examples-by-keyword lookup',
      urlMatcher:function (_urlParts) {
        return _urlParts.pathname == this.memoryUrl ('examples-by-keyword');
      },
      builderInputs:function (_urlParts) {
        return {filesIndex:this.memoryUrl ('examples.index')};
      },
      builder:function (_inputs) {
        var
          _examples = this.readFile ({path:_inputs.filesIndex}),
          _examplesByKeyword = {'':_examples}
        ;
        for (
          var _exampleNo = -1, _examplesLength = _examples.length, _example, _keywords, _keywordsStr;
          ++_exampleNo < _examplesLength;
        ) {
          if (_keywordsStr = (_example = _examples [_exampleNo]).keywords) {
            for (
              var
                _keywordNo = -1,
                _keywords = _keywordsStr.split (' '),
                _keywordsLength = _keywords.length,
                _keyword
              ;
              ++_keywordNo < _keywordsLength;
            )
              (
                _examplesByKeyword [_keyword = _keywords [_keywordNo]] ||
                (_examplesByKeyword [_keyword] = [])
              ).push (_example)
            ;
          }
        }
        return _examplesByKeyword;
      }
    });
  }
});