all files / lib/ filesniffer.js

97.84% Statements 136/139
74.29% Branches 52/70
100% Functions 31/31
100% Lines 111/111
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'use strict';
 
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; Eif ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (EprotoProps) defineProperties(Constructor.prototype, protoProps); Eif (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
 
var _lodash = require('lodash');
 
var _lodash2 = _interopRequireDefault(_lodash);
 
var _bluebird = require('bluebird');
 
var _bluebird2 = _interopRequireDefault(_bluebird);
 
var _fs = require('fs');
 
var _fs2 = _interopRequireDefault(_fs);
 
var _filehound = require('filehound');
 
var _filehound2 = _interopRequireDefault(_filehound);
 
var _events = require('events');
 
var _byline = require('byline');
 
var _byline2 = _interopRequireDefault(_byline);
 
var _path = require('path');
 
var _path2 = _interopRequireDefault(_path);
 
var _binary = require('./binary');
 
var _binary2 = _interopRequireDefault(_binary);
 
var _zlib = require('zlib');
 
var _zlib2 = _interopRequireDefault(_zlib);
 
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
 
function _classCallCheck(instance, Constructor) { if (I!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
 
function _possibleConstructorReturn(self, call) { if (I!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }
 
function _inherits(subClass, superClass) { if (Itypeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); Eif (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
 
var LineStream = require('byline').LineStream;
 
function stringMatch(data, string) {
  return data.indexOf(string) !== -1;
}
 
function regExpMatch(data, pattern) {
  return pattern.test(data);
}
 
function invalidInputSource(source) {
  return !(source instanceof _filehound2.default) && !_lodash2.default.isString(source) && !_lodash2.default.isArray(source);
}
 
function from(args) {
  var arg = args[0];
 
  if (invalidInputSource(arg)) {
    throw new Error('Invalid input source');
  }
 
  if (arg instanceof _filehound2.default || _lodash2.default.isArray(arg)) {
    return arg;
  }
 
  return Array.prototype.slice.call(args);
}
 
function getStats(file) {
  return _fs2.default.statSync(file);
}
 
function isDirectory(file) {
  return getStats(file).isDirectory();
}
 
function getSource(args) {
  return args.length === 0 ? [process.cwd()] : from(arguments[0]);
}
 
function flatten(a, b) {
  return a.concat(b);
}
 
var FileSniffer = function (_EventEmitter) {
  _inherits(FileSniffer, _EventEmitter);
 
  function FileSniffer(args) {
    _classCallCheck(this, FileSniffer);
 
    var _this = _possibleConstructorReturn(this, Object.getPrototypeOf(FileSniffer).call(this));
 
    _this.inputSource = getSource(args);
    _this.filenames = [];
    _this.pending = 0;
    _this.processed = 0;
    _this.gzipMode = false;
    return _this;
  }
 
  _createClass(FileSniffer, [{
    key: '_createStream',
    value: function _createStream(file) {
      if (this._handleGzip(file)) {
        var fstream = _fs2.default.createReadStream(file);
        var unzipStream = _zlib2.default.createGunzip();
        var lineStream = new LineStream();
 
        fstream.pipe(unzipStream).pipe(lineStream);
 
        return lineStream;
      }
 
      return (0, _byline2.default)(_fs2.default.createReadStream(file, {
        encoding: 'utf-8'
      }));
    }
  }, {
    key: '_createMatcher',
    value: function _createMatcher(pattern) {
      return _lodash2.default.isString(pattern) ? stringMatch : regExpMatch;
    }
  }, {
    key: '_handleGzip',
    value: function _handleGzip(file) {
      return _path2.default.extname(file) === '.gz' && this.gzipMode;
    }
  }, {
    key: '_notBinaryFile',
    value: function _notBinaryFile(file) {
      if (this._handleGzip(file)) return true;
 
      return !(0, _binary2.default)(file);
    }
  }, {
    key: '_groupByFileType',
    value: function _groupByFileType(paths) {
      var dirs = [];
      var files = [];
 
      for (var i = 0; i < paths.length; i++) {
        try {
          isDirectory(paths[i]) ? dirs.push(paths[i]) : files.push(paths[i]);
        } catch (err) {
          this.emit('error', err);
        }
      }
 
      return {
        files: files,
        dirs: dirs
      };
    }
  }, {
    key: '_getFiles',
    value: function _getFiles() {
      if (this.inputSource instanceof _filehound2.default) return this.inputSource.find();
 
      if (E_lodash2.default.isArray(this.inputSource)) {
        var fileTypes = this._groupByFileType(this.inputSource);
        var allFiles = _bluebird2.default.resolve(fileTypes.files);
        var allDirs = _bluebird2.default.resolve([]);
 
        if (fileTypes.dirs.length > 0) {
          allDirs = _filehound2.default.create().depth(0).ignoreHiddenFiles().paths(fileTypes.dirs).find();
        }
 
        return _bluebird2.default.join(allFiles, allDirs, flatten);
      }
    }
  }, {
    key: '_search',
    value: function _search(file, pattern) {
      var _this2 = this;
 
      var snifferStream = this._createStream(file);
      var isMatch = this._createMatcher(pattern);
 
      var matched = false;
      snifferStream.on('readable', function () {
        var line = void 0;
        while (null !== (line = snifferStream.read())) {
          if (line instanceof Buffer) {
            line = line.toString('utf8');
          }
          if (isMatch(line, pattern)) {
            matched = true;
            _this2.emit('match', file, line);
          }
        }
      });
 
      snifferStream.on('end', function () {
        _this2.pending--;
        _this2.emit('eof', file);
        if (matched) _this2.filenames.push(file);
        if (_this2.pending === 0) {
          _this2.emit('end', _this2.filenames);
        }
      });
    }
  }, {
    key: 'gzip',
    value: function gzip() {
      this.gzipMode = true;
      return this;
    }
  }, {
    key: 'find',
    value: function find(pattern) {
      var _this3 = this;
 
      var notBinaryFile = this._notBinaryFile.bind(this);
 
      this._getFiles().filter(notBinaryFile).then(function (files) {
        _this3.pending = files.length;
        return files;
      }).each(function (file) {
        _this3._search(file, pattern);
      });
    }
  }], [{
    key: 'create',
    value: function create() {
      return new FileSniffer(arguments);
    }
  }]);
 
  return FileSniffer;
}(_events.EventEmitter);
 
module.exports = FileSniffer;