discourse/vendor/assets/javascripts/route-recognizer.js

694 lines
23 KiB
JavaScript

(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
typeof define === 'function' && define.amd ? define('route-recognizer', factory) :
(global.RouteRecognizer = factory());
}(this, (function () { 'use strict';
var createObject = Object.create;
function createMap() {
var map = createObject(null);
map["__"] = undefined;
delete map["__"];
return map;
}
var Target = function Target(path, matcher, delegate) {
this.path = path;
this.matcher = matcher;
this.delegate = delegate;
};
Target.prototype.to = function to (target, callback) {
var delegate = this.delegate;
if (delegate && delegate.willAddRoute) {
target = delegate.willAddRoute(this.matcher.target, target);
}
this.matcher.add(this.path, target);
if (callback) {
if (callback.length === 0) {
throw new Error("You must have an argument in the function passed to `to`");
}
this.matcher.addChild(this.path, target, callback, this.delegate);
}
};
var Matcher = function Matcher(target) {
this.routes = createMap();
this.children = createMap();
this.target = target;
};
Matcher.prototype.add = function add (path, target) {
this.routes[path] = target;
};
Matcher.prototype.addChild = function addChild (path, target, callback, delegate) {
var matcher = new Matcher(target);
this.children[path] = matcher;
var match = generateMatch(path, matcher, delegate);
if (delegate && delegate.contextEntered) {
delegate.contextEntered(target, match);
}
callback(match);
};
function generateMatch(startingPath, matcher, delegate) {
function match(path, callback) {
var fullPath = startingPath + path;
if (callback) {
callback(generateMatch(fullPath, matcher, delegate));
}
else {
return new Target(fullPath, matcher, delegate);
}
}
return match;
}
function addRoute(routeArray, path, handler) {
var len = 0;
for (var i = 0; i < routeArray.length; i++) {
len += routeArray[i].path.length;
}
path = path.substr(len);
var route = { path: path, handler: handler };
routeArray.push(route);
}
function eachRoute(baseRoute, matcher, callback, binding) {
var routes = matcher.routes;
var paths = Object.keys(routes);
for (var i = 0; i < paths.length; i++) {
var path = paths[i];
var routeArray = baseRoute.slice();
addRoute(routeArray, path, routes[path]);
var nested = matcher.children[path];
if (nested) {
eachRoute(routeArray, nested, callback, binding);
}
else {
callback.call(binding, routeArray);
}
}
}
var map = function (callback, addRouteCallback) {
var matcher = new Matcher();
callback(generateMatch("", matcher, this.delegate));
eachRoute([], matcher, function (routes) {
if (addRouteCallback) {
addRouteCallback(this, routes);
}
else {
this.add(routes);
}
}, this);
};
// Normalizes percent-encoded values in `path` to upper-case and decodes percent-encoded
// values that are not reserved (i.e., unicode characters, emoji, etc). The reserved
// chars are "/" and "%".
// Safe to call multiple times on the same path.
// Normalizes percent-encoded values in `path` to upper-case and decodes percent-encoded
function normalizePath(path) {
return path.split("/")
.map(normalizeSegment)
.join("/");
}
// We want to ensure the characters "%" and "/" remain in percent-encoded
// form when normalizing paths, so replace them with their encoded form after
// decoding the rest of the path
var SEGMENT_RESERVED_CHARS = /%|\//g;
function normalizeSegment(segment) {
if (segment.length < 3 || segment.indexOf("%") === -1)
{ return segment; }
return decodeURIComponent(segment).replace(SEGMENT_RESERVED_CHARS, encodeURIComponent);
}
// We do not want to encode these characters when generating dynamic path segments
// See https://tools.ietf.org/html/rfc3986#section-3.3
// sub-delims: "!", "$", "&", "'", "(", ")", "*", "+", ",", ";", "="
// others allowed by RFC 3986: ":", "@"
//
// First encode the entire path segment, then decode any of the encoded special chars.
//
// The chars "!", "'", "(", ")", "*" do not get changed by `encodeURIComponent`,
// so the possible encoded chars are:
// ['%24', '%26', '%2B', '%2C', '%3B', '%3D', '%3A', '%40'].
var PATH_SEGMENT_ENCODINGS = /%(?:2(?:4|6|B|C)|3(?:B|D|A)|40)/g;
function encodePathSegment(str) {
return encodeURIComponent(str).replace(PATH_SEGMENT_ENCODINGS, decodeURIComponent);
}
var escapeRegex = /(\/|\.|\*|\+|\?|\||\(|\)|\[|\]|\{|\}|\\)/g;
var isArray = Array.isArray;
var hasOwnProperty = Object.prototype.hasOwnProperty;
function getParam(params, key) {
if (typeof params !== "object" || params === null) {
throw new Error("You must pass an object as the second argument to `generate`.");
}
if (!hasOwnProperty.call(params, key)) {
throw new Error("You must provide param `" + key + "` to `generate`.");
}
var value = params[key];
var str = typeof value === "string" ? value : "" + value;
if (str.length === 0) {
throw new Error("You must provide a param `" + key + "`.");
}
return str;
}
var eachChar = [];
eachChar[0 /* Static */] = function (segment, currentState) {
var state = currentState;
var value = segment.value;
for (var i = 0; i < value.length; i++) {
var ch = value.charCodeAt(i);
state = state.put(ch, false, false);
}
return state;
};
eachChar[1 /* Dynamic */] = function (_, currentState) {
return currentState.put(47 /* SLASH */, true, true);
};
eachChar[2 /* Star */] = function (_, currentState) {
return currentState.put(-1 /* ANY */, false, true);
};
eachChar[4 /* Epsilon */] = function (_, currentState) {
return currentState;
};
var regex = [];
regex[0 /* Static */] = function (segment) {
return segment.value.replace(escapeRegex, "\\$1");
};
regex[1 /* Dynamic */] = function () {
return "([^/]+)";
};
regex[2 /* Star */] = function () {
return "(.+)";
};
regex[4 /* Epsilon */] = function () {
return "";
};
var generate = [];
generate[0 /* Static */] = function (segment) {
return segment.value;
};
generate[1 /* Dynamic */] = function (segment, params) {
var value = getParam(params, segment.value);
if (RouteRecognizer.ENCODE_AND_DECODE_PATH_SEGMENTS) {
return encodePathSegment(value);
}
else {
return value;
}
};
generate[2 /* Star */] = function (segment, params) {
return getParam(params, segment.value);
};
generate[4 /* Epsilon */] = function () {
return "";
};
var EmptyObject = Object.freeze({});
var EmptyArray = Object.freeze([]);
// The `names` will be populated with the paramter name for each dynamic/star
// segment. `shouldDecodes` will be populated with a boolean for each dyanamic/star
// segment, indicating whether it should be decoded during recognition.
function parse(segments, route, types) {
// normalize route as not starting with a "/". Recognition will
// also normalize.
if (route.length > 0 && route.charCodeAt(0) === 47 /* SLASH */) {
route = route.substr(1);
}
var parts = route.split("/");
var names = undefined;
var shouldDecodes = undefined;
for (var i = 0; i < parts.length; i++) {
var part = parts[i];
var flags = 0;
var type = 0;
if (part === "") {
type = 4 /* Epsilon */;
}
else if (part.charCodeAt(0) === 58 /* COLON */) {
type = 1 /* Dynamic */;
}
else if (part.charCodeAt(0) === 42 /* STAR */) {
type = 2 /* Star */;
}
else {
type = 0 /* Static */;
}
flags = 2 << type;
if (flags & 12 /* Named */) {
part = part.slice(1);
names = names || [];
names.push(part);
shouldDecodes = shouldDecodes || [];
shouldDecodes.push((flags & 4 /* Decoded */) !== 0);
}
if (flags & 14 /* Counted */) {
types[type]++;
}
segments.push({
type: type,
value: normalizeSegment(part)
});
}
return {
names: names || EmptyArray,
shouldDecodes: shouldDecodes || EmptyArray,
};
}
function isEqualCharSpec(spec, char, negate) {
return spec.char === char && spec.negate === negate;
}
// A State has a character specification and (`charSpec`) and a list of possible
// subsequent states (`nextStates`).
//
// If a State is an accepting state, it will also have several additional
// properties:
//
// * `regex`: A regular expression that is used to extract parameters from paths
// that reached this accepting state.
// * `handlers`: Information on how to convert the list of captures into calls
// to registered handlers with the specified parameters
// * `types`: How many static, dynamic or star segments in this route. Used to
// decide which route to use if multiple registered routes match a path.
//
// Currently, State is implemented naively by looping over `nextStates` and
// comparing a character specification against a character. A more efficient
// implementation would use a hash of keys pointing at one or more next states.
var State = function State(states, id, char, negate, repeat) {
this.states = states;
this.id = id;
this.char = char;
this.negate = negate;
this.nextStates = repeat ? id : null;
this.pattern = "";
this._regex = undefined;
this.handlers = undefined;
this.types = undefined;
};
State.prototype.regex = function regex$1 () {
if (!this._regex) {
this._regex = new RegExp(this.pattern);
}
return this._regex;
};
State.prototype.get = function get (char, negate) {
var this$1 = this;
var nextStates = this.nextStates;
if (nextStates === null)
{ return; }
if (isArray(nextStates)) {
for (var i = 0; i < nextStates.length; i++) {
var child = this$1.states[nextStates[i]];
if (isEqualCharSpec(child, char, negate)) {
return child;
}
}
}
else {
var child$1 = this.states[nextStates];
if (isEqualCharSpec(child$1, char, negate)) {
return child$1;
}
}
};
State.prototype.put = function put (char, negate, repeat) {
var state;
// If the character specification already exists in a child of the current
// state, just return that state.
if (state = this.get(char, negate)) {
return state;
}
// Make a new state for the character spec
var states = this.states;
state = new State(states, states.length, char, negate, repeat);
states[states.length] = state;
// Insert the new state as a child of the current state
if (this.nextStates == null) {
this.nextStates = state.id;
}
else if (isArray(this.nextStates)) {
this.nextStates.push(state.id);
}
else {
this.nextStates = [this.nextStates, state.id];
}
// Return the new state
return state;
};
// Find a list of child states matching the next character
State.prototype.match = function match (ch) {
var this$1 = this;
var nextStates = this.nextStates;
if (!nextStates)
{ return []; }
var returned = [];
if (isArray(nextStates)) {
for (var i = 0; i < nextStates.length; i++) {
var child = this$1.states[nextStates[i]];
if (isMatch(child, ch)) {
returned.push(child);
}
}
}
else {
var child$1 = this.states[nextStates];
if (isMatch(child$1, ch)) {
returned.push(child$1);
}
}
return returned;
};
function isMatch(spec, char) {
return spec.negate ? spec.char !== char && spec.char !== -1 /* ANY */ : spec.char === char || spec.char === -1 /* ANY */;
}
// This is a somewhat naive strategy, but should work in a lot of cases
// A better strategy would properly resolve /posts/:id/new and /posts/edit/:id.
//
// This strategy generally prefers more static and less dynamic matching.
// Specifically, it
//
// * prefers fewer stars to more, then
// * prefers using stars for less of the match to more, then
// * prefers fewer dynamic segments to more, then
// * prefers more static segments to more
function sortSolutions(states) {
return states.sort(function (a, b) {
var ref = a.types || [0, 0, 0];
var astatics = ref[0];
var adynamics = ref[1];
var astars = ref[2];
var ref$1 = b.types || [0, 0, 0];
var bstatics = ref$1[0];
var bdynamics = ref$1[1];
var bstars = ref$1[2];
if (astars !== bstars) {
return astars - bstars;
}
if (astars) {
if (astatics !== bstatics) {
return bstatics - astatics;
}
if (adynamics !== bdynamics) {
return bdynamics - adynamics;
}
}
if (adynamics !== bdynamics) {
return adynamics - bdynamics;
}
if (astatics !== bstatics) {
return bstatics - astatics;
}
return 0;
});
}
function recognizeChar(states, ch) {
var nextStates = [];
for (var i = 0, l = states.length; i < l; i++) {
var state = states[i];
nextStates = nextStates.concat(state.match(ch));
}
return nextStates;
}
var RecognizeResults = function RecognizeResults(queryParams) {
this.length = 0;
this.queryParams = queryParams || {};
};
RecognizeResults.prototype.splice = Array.prototype.splice;
RecognizeResults.prototype.slice = Array.prototype.slice;
RecognizeResults.prototype.push = Array.prototype.push;
function findHandler(state, originalPath, queryParams) {
var handlers = state.handlers;
var regex = state.regex();
if (!regex || !handlers)
{ throw new Error("state not initialized"); }
var captures = originalPath.match(regex);
var currentCapture = 1;
var result = new RecognizeResults(queryParams);
result.length = handlers.length;
for (var i = 0; i < handlers.length; i++) {
var handler = handlers[i];
var names = handler.names;
var shouldDecodes = handler.shouldDecodes;
var params = EmptyObject;
var isDynamic = false;
if (names !== EmptyArray && shouldDecodes !== EmptyArray) {
for (var j = 0; j < names.length; j++) {
isDynamic = true;
var name = names[j];
var capture = captures && captures[currentCapture++];
if (params === EmptyObject) {
params = {};
}
if (RouteRecognizer.ENCODE_AND_DECODE_PATH_SEGMENTS && shouldDecodes[j]) {
params[name] = capture && decodeURIComponent(capture);
}
else {
params[name] = capture;
}
}
}
result[i] = {
handler: handler.handler,
params: params,
isDynamic: isDynamic
};
}
return result;
}
function decodeQueryParamPart(part) {
// http://www.w3.org/TR/html401/interact/forms.html#h-17.13.4.1
part = part.replace(/\+/gm, "%20");
var result;
try {
result = decodeURIComponent(part);
}
catch (error) {
result = "";
}
return result;
}
var RouteRecognizer = function RouteRecognizer() {
this.names = createMap();
var states = [];
var state = new State(states, 0, -1 /* ANY */, true, false);
states[0] = state;
this.states = states;
this.rootState = state;
};
RouteRecognizer.prototype.add = function add (routes, options) {
var currentState = this.rootState;
var pattern = "^";
var types = [0, 0, 0];
var handlers = new Array(routes.length);
var allSegments = [];
var isEmpty = true;
var j = 0;
for (var i = 0; i < routes.length; i++) {
var route = routes[i];
var ref = parse(allSegments, route.path, types);
var names = ref.names;
var shouldDecodes = ref.shouldDecodes;
// preserve j so it points to the start of newly added segments
for (; j < allSegments.length; j++) {
var segment = allSegments[j];
if (segment.type === 4 /* Epsilon */) {
continue;
}
isEmpty = false;
// Add a "/" for the new segment
currentState = currentState.put(47 /* SLASH */, false, false);
pattern += "/";
// Add a representation of the segment to the NFA and regex
currentState = eachChar[segment.type](segment, currentState);
pattern += regex[segment.type](segment);
}
handlers[i] = {
handler: route.handler,
names: names,
shouldDecodes: shouldDecodes
};
}
if (isEmpty) {
currentState = currentState.put(47 /* SLASH */, false, false);
pattern += "/";
}
currentState.handlers = handlers;
currentState.pattern = pattern + "$";
currentState.types = types;
var name;
if (typeof options === "object" && options !== null && options.as) {
name = options.as;
}
if (name) {
// if (this.names[name]) {
// throw new Error("You may not add a duplicate route named `" + name + "`.");
// }
this.names[name] = {
segments: allSegments,
handlers: handlers
};
}
};
RouteRecognizer.prototype.handlersFor = function handlersFor (name) {
var route = this.names[name];
if (!route) {
throw new Error("There is no route named " + name);
}
var result = new Array(route.handlers.length);
for (var i = 0; i < route.handlers.length; i++) {
var handler = route.handlers[i];
result[i] = handler;
}
return result;
};
RouteRecognizer.prototype.hasRoute = function hasRoute (name) {
return !!this.names[name];
};
RouteRecognizer.prototype.generate = function generate$1 (name, params) {
var route = this.names[name];
var output = "";
if (!route) {
throw new Error("There is no route named " + name);
}
var segments = route.segments;
for (var i = 0; i < segments.length; i++) {
var segment = segments[i];
if (segment.type === 4 /* Epsilon */) {
continue;
}
output += "/";
output += generate[segment.type](segment, params);
}
if (output.charAt(0) !== "/") {
output = "/" + output;
}
if (params && params.queryParams) {
output += this.generateQueryString(params.queryParams);
}
return output;
};
RouteRecognizer.prototype.generateQueryString = function generateQueryString (params) {
var pairs = [];
var keys = Object.keys(params);
keys.sort();
for (var i = 0; i < keys.length; i++) {
var key = keys[i];
var value = params[key];
if (value == null) {
continue;
}
var pair = encodeURIComponent(key);
if (isArray(value)) {
for (var j = 0; j < value.length; j++) {
var arrayPair = key + "[]" + "=" + encodeURIComponent(value[j]);
pairs.push(arrayPair);
}
}
else {
pair += "=" + encodeURIComponent(value);
pairs.push(pair);
}
}
if (pairs.length === 0) {
return "";
}
return "?" + pairs.join("&");
};
RouteRecognizer.prototype.parseQueryString = function parseQueryString (queryString) {
var pairs = queryString.split("&");
var queryParams = {};
for (var i = 0; i < pairs.length; i++) {
var pair = pairs[i].split("="), key = decodeQueryParamPart(pair[0]), keyLength = key.length, isArray = false, value = (void 0);
if (pair.length === 1) {
value = "true";
}
else {
// Handle arrays
if (keyLength > 2 && key.slice(keyLength - 2) === "[]") {
isArray = true;
key = key.slice(0, keyLength - 2);
if (!queryParams[key]) {
queryParams[key] = [];
}
}
value = pair[1] ? decodeQueryParamPart(pair[1]) : "";
}
if (isArray) {
queryParams[key].push(value);
}
else {
queryParams[key] = value;
}
}
return queryParams;
};
RouteRecognizer.prototype.recognize = function recognize (path) {
var results;
var states = [this.rootState];
var queryParams = {};
var isSlashDropped = false;
var hashStart = path.indexOf("#");
if (hashStart !== -1) {
path = path.substr(0, hashStart);
}
var queryStart = path.indexOf("?");
if (queryStart !== -1) {
var queryString = path.substr(queryStart + 1, path.length);
path = path.substr(0, queryStart);
queryParams = this.parseQueryString(queryString);
}
if (path.charAt(0) !== "/") {
path = "/" + path;
}
var originalPath = path;
if (RouteRecognizer.ENCODE_AND_DECODE_PATH_SEGMENTS) {
path = normalizePath(path);
}
else {
path = decodeURI(path);
originalPath = decodeURI(originalPath);
}
var pathLen = path.length;
if (pathLen > 1 && path.charAt(pathLen - 1) === "/") {
path = path.substr(0, pathLen - 1);
originalPath = originalPath.substr(0, originalPath.length - 1);
isSlashDropped = true;
}
for (var i = 0; i < path.length; i++) {
states = recognizeChar(states, path.charCodeAt(i));
if (!states.length) {
break;
}
}
var solutions = [];
for (var i$1 = 0; i$1 < states.length; i$1++) {
if (states[i$1].handlers) {
solutions.push(states[i$1]);
}
}
states = sortSolutions(solutions);
var state = solutions[0];
if (state && state.handlers) {
// if a trailing slash was dropped and a star segment is the last segment
// specified, put the trailing slash back
if (isSlashDropped && state.pattern && state.pattern.slice(-5) === "(.+)$") {
originalPath = originalPath + "/";
}
results = findHandler(state, originalPath, queryParams);
}
return results;
};
RouteRecognizer.VERSION = "0.3.4";
// Set to false to opt-out of encoding and decoding path segments.
// See https://github.com/tildeio/route-recognizer/pull/55
RouteRecognizer.ENCODE_AND_DECODE_PATH_SEGMENTS = true;
RouteRecognizer.Normalizer = {
normalizeSegment: normalizeSegment, normalizePath: normalizePath, encodePathSegment: encodePathSegment
};
RouteRecognizer.prototype.map = map;
return RouteRecognizer;
})));
//# sourceMappingURL=route-recognizer.js.map