aurelia-bootstrap/doc/jspm_packages/npm/aurelia-route-recognizer@1.0.0/aurelia-route-recognizer.js

Bootstrap components written in Aurelia.

/* */ 
define(['exports', 'aurelia-path'], function (exports, _aureliaPath) {
  'use strict';

  Object.defineProperty(exports, "__esModule", {
    value: true
  });
  exports.RouteRecognizer = exports.EpsilonSegment = exports.StarSegment = exports.DynamicSegment = exports.StaticSegment = exports.State = undefined;

  

  var State = exports.State = function () {
    function State(charSpec) {
      

      this.charSpec = charSpec;
      this.nextStates = [];
    }

    State.prototype.get = function get(charSpec) {
      for (var _iterator = this.nextStates, _isArray = Array.isArray(_iterator), _i = 0, _iterator = _isArray ? _iterator : _iterator[Symbol.iterator]();;) {
        var _ref;

        if (_isArray) {
          if (_i >= _iterator.length) break;
          _ref = _iterator[_i++];
        } else {
          _i = _iterator.next();
          if (_i.done) break;
          _ref = _i.value;
        }

        var child = _ref;

        var isEqual = child.charSpec.validChars === charSpec.validChars && child.charSpec.invalidChars === charSpec.invalidChars;

        if (isEqual) {
          return child;
        }
      }

      return undefined;
    };

    State.prototype.put = function put(charSpec) {
      var state = this.get(charSpec);

      if (state) {
        return state;
      }

      state = new State(charSpec);

      this.nextStates.push(state);

      if (charSpec.repeat) {
        state.nextStates.push(state);
      }

      return state;
    };

    State.prototype.match = function match(ch) {
      var nextStates = this.nextStates;
      var results = [];

      for (var i = 0, l = nextStates.length; i < l; i++) {
        var child = nextStates[i];
        var charSpec = child.charSpec;

        if (charSpec.validChars !== undefined) {
          if (charSpec.validChars.indexOf(ch) !== -1) {
            results.push(child);
          }
        } else if (charSpec.invalidChars !== undefined) {
          if (charSpec.invalidChars.indexOf(ch) === -1) {
            results.push(child);
          }
        }
      }

      return results;
    };

    return State;
  }();

  var specials = ['/', '.', '*', '+', '?', '|', '(', ')', '[', ']', '{', '}', '\\'];

  var escapeRegex = new RegExp('(\\' + specials.join('|\\') + ')', 'g');

  var StaticSegment = exports.StaticSegment = function () {
    function StaticSegment(string, caseSensitive) {
      

      this.string = string;
      this.caseSensitive = caseSensitive;
    }

    StaticSegment.prototype.eachChar = function eachChar(callback) {
      var s = this.string;
      for (var i = 0, ii = s.length; i < ii; ++i) {
        var ch = s[i];
        callback({ validChars: this.caseSensitive ? ch : ch.toUpperCase() + ch.toLowerCase() });
      }
    };

    StaticSegment.prototype.regex = function regex() {
      return this.string.replace(escapeRegex, '\\$1');
    };

    StaticSegment.prototype.generate = function generate() {
      return this.string;
    };

    return StaticSegment;
  }();

  var DynamicSegment = exports.DynamicSegment = function () {
    function DynamicSegment(name) {
      

      this.name = name;
    }

    DynamicSegment.prototype.eachChar = function eachChar(callback) {
      callback({ invalidChars: '/', repeat: true });
    };

    DynamicSegment.prototype.regex = function regex() {
      return '([^/]+)';
    };

    DynamicSegment.prototype.generate = function generate(params, consumed) {
      consumed[this.name] = true;
      return params[this.name];
    };

    return DynamicSegment;
  }();

  var StarSegment = exports.StarSegment = function () {
    function StarSegment(name) {
      

      this.name = name;
    }

    StarSegment.prototype.eachChar = function eachChar(callback) {
      callback({ invalidChars: '', repeat: true });
    };

    StarSegment.prototype.regex = function regex() {
      return '(.+)';
    };

    StarSegment.prototype.generate = function generate(params, consumed) {
      consumed[this.name] = true;
      return params[this.name];
    };

    return StarSegment;
  }();

  var EpsilonSegment = exports.EpsilonSegment = function () {
    function EpsilonSegment() {
      
    }

    EpsilonSegment.prototype.eachChar = function eachChar() {};

    EpsilonSegment.prototype.regex = function regex() {
      return '';
    };

    EpsilonSegment.prototype.generate = function generate() {
      return '';
    };

    return EpsilonSegment;
  }();

  var RouteRecognizer = exports.RouteRecognizer = function () {
    function RouteRecognizer() {
      

      this.rootState = new State();
      this.names = {};
    }

    RouteRecognizer.prototype.add = function add(route) {
      var _this = this;

      if (Array.isArray(route)) {
        route.forEach(function (r) {
          return _this.add(r);
        });
        return undefined;
      }

      var currentState = this.rootState;
      var regex = '^';
      var types = { statics: 0, dynamics: 0, stars: 0 };
      var names = [];
      var routeName = route.handler.name;
      var isEmpty = true;
      var segments = parse(route.path, names, types, route.caseSensitive);

      for (var i = 0, ii = segments.length; i < ii; i++) {
        var segment = segments[i];
        if (segment instanceof EpsilonSegment) {
          continue;
        }

        isEmpty = false;

        currentState = currentState.put({ validChars: '/' });
        regex += '/';

        currentState = addSegment(currentState, segment);
        regex += segment.regex();
      }

      if (isEmpty) {
        currentState = currentState.put({ validChars: '/' });
        regex += '/';
      }

      var handlers = [{ handler: route.handler, names: names }];

      if (routeName) {
        var routeNames = Array.isArray(routeName) ? routeName : [routeName];
        for (var _i2 = 0; _i2 < routeNames.length; _i2++) {
          this.names[routeNames[_i2]] = {
            segments: segments,
            handlers: handlers
          };
        }
      }

      currentState.handlers = handlers;
      currentState.regex = new RegExp(regex + '$', route.caseSensitive ? '' : 'i');
      currentState.types = types;

      return currentState;
    };

    RouteRecognizer.prototype.handlersFor = function handlersFor(name) {
      var route = this.names[name];
      if (!route) {
        throw new Error('There is no route named ' + name);
      }

      return [].concat(route.handlers);
    };

    RouteRecognizer.prototype.hasRoute = function hasRoute(name) {
      return !!this.names[name];
    };

    RouteRecognizer.prototype.generate = function generate(name, params) {
      var route = this.names[name];
      if (!route) {
        throw new Error('There is no route named ' + name);
      }

      var handler = route.handlers[0].handler;
      if (handler.generationUsesHref) {
        return handler.href;
      }

      var routeParams = Object.assign({}, params);
      var segments = route.segments;
      var consumed = {};
      var output = '';

      for (var i = 0, l = segments.length; i < l; i++) {
        var segment = segments[i];

        if (segment instanceof EpsilonSegment) {
          continue;
        }

        output += '/';
        var segmentValue = segment.generate(routeParams, consumed);
        if (segmentValue === null || segmentValue === undefined) {
          throw new Error('A value is required for route parameter \'' + segment.name + '\' in route \'' + name + '\'.');
        }

        output += segmentValue;
      }

      if (output.charAt(0) !== '/') {
        output = '/' + output;
      }

      for (var param in consumed) {
        delete routeParams[param];
      }

      var queryString = (0, _aureliaPath.buildQueryString)(routeParams);
      output += queryString ? '?' + queryString : '';

      return output;
    };

    RouteRecognizer.prototype.recognize = function recognize(path) {
      var states = [this.rootState];
      var queryParams = {};
      var isSlashDropped = false;
      var normalizedPath = path;

      var queryStart = normalizedPath.indexOf('?');
      if (queryStart !== -1) {
        var queryString = normalizedPath.substr(queryStart + 1, normalizedPath.length);
        normalizedPath = normalizedPath.substr(0, queryStart);
        queryParams = (0, _aureliaPath.parseQueryString)(queryString);
      }

      normalizedPath = decodeURI(normalizedPath);

      if (normalizedPath.charAt(0) !== '/') {
        normalizedPath = '/' + normalizedPath;
      }

      var pathLen = normalizedPath.length;
      if (pathLen > 1 && normalizedPath.charAt(pathLen - 1) === '/') {
        normalizedPath = normalizedPath.substr(0, pathLen - 1);
        isSlashDropped = true;
      }

      for (var i = 0, l = normalizedPath.length; i < l; i++) {
        states = recognizeChar(states, normalizedPath.charAt(i));
        if (!states.length) {
          break;
        }
      }

      var solutions = [];
      for (var _i3 = 0, _l = states.length; _i3 < _l; _i3++) {
        if (states[_i3].handlers) {
          solutions.push(states[_i3]);
        }
      }

      states = sortSolutions(solutions);

      var state = solutions[0];
      if (state && state.handlers) {
        if (isSlashDropped && state.regex.source.slice(-5) === '(.+)$') {
          normalizedPath = normalizedPath + '/';
        }

        return findHandler(state, normalizedPath, queryParams);
      }

      return undefined;
    };

    return RouteRecognizer;
  }();

  var RecognizeResults = function RecognizeResults(queryParams) {
    

    this.splice = Array.prototype.splice;
    this.slice = Array.prototype.slice;
    this.push = Array.prototype.push;
    this.length = 0;
    this.queryParams = queryParams || {};
  };

  function parse(route, names, types, caseSensitive) {
    var normalizedRoute = route;
    if (route.charAt(0) === '/') {
      normalizedRoute = route.substr(1);
    }

    var results = [];

    var splitRoute = normalizedRoute.split('/');
    for (var i = 0, ii = splitRoute.length; i < ii; ++i) {
      var segment = splitRoute[i];
      var match = segment.match(/^:([^\/]+)$/);
      if (match) {
        results.push(new DynamicSegment(match[1]));
        names.push(match[1]);
        types.dynamics++;
        continue;
      }

      match = segment.match(/^\*([^\/]+)$/);
      if (match) {
        results.push(new StarSegment(match[1]));
        names.push(match[1]);
        types.stars++;
      } else if (segment === '') {
        results.push(new EpsilonSegment());
      } else {
        results.push(new StaticSegment(segment, caseSensitive));
        types.statics++;
      }
    }

    return results;
  }

  function sortSolutions(states) {
    return states.sort(function (a, b) {
      if (a.types.stars !== b.types.stars) {
        return a.types.stars - b.types.stars;
      }

      if (a.types.stars) {
        if (a.types.statics !== b.types.statics) {
          return b.types.statics - a.types.statics;
        }
        if (a.types.dynamics !== b.types.dynamics) {
          return b.types.dynamics - a.types.dynamics;
        }
      }

      if (a.types.dynamics !== b.types.dynamics) {
        return a.types.dynamics - b.types.dynamics;
      }

      if (a.types.statics !== b.types.statics) {
        return b.types.statics - a.types.statics;
      }

      return 0;
    });
  }

  function recognizeChar(states, ch) {
    var nextStates = [];

    for (var i = 0, l = states.length; i < l; i++) {
      var state = states[i];
      nextStates.push.apply(nextStates, state.match(ch));
    }

    return nextStates;
  }

  function findHandler(state, path, queryParams) {
    var handlers = state.handlers;
    var regex = state.regex;
    var captures = path.match(regex);
    var currentCapture = 1;
    var result = new RecognizeResults(queryParams);

    for (var i = 0, l = handlers.length; i < l; i++) {
      var _handler = handlers[i];
      var _names = _handler.names;
      var _params = {};

      for (var j = 0, m = _names.length; j < m; j++) {
        _params[_names[j]] = captures[currentCapture++];
      }

      result.push({ handler: _handler.handler, params: _params, isDynamic: !!_names.length });
    }

    return result;
  }

  function addSegment(currentState, segment) {
    var state = currentState;
    segment.eachChar(function (ch) {
      state = state.put(ch);
    });

    return state;
  }
});