403 lines
12 KiB
JavaScript
403 lines
12 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.TokenData = void 0;
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exports.parse = parse;
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exports.compile = compile;
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exports.match = match;
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exports.pathToRegexp = pathToRegexp;
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exports.stringify = stringify;
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const DEFAULT_DELIMITER = "/";
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const NOOP_VALUE = (value) => value;
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const ID_START = /^[$_\p{ID_Start}]$/u;
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const ID_CONTINUE = /^[$\u200c\u200d\p{ID_Continue}]$/u;
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const DEBUG_URL = "https://git.new/pathToRegexpError";
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const SIMPLE_TOKENS = {
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// Groups.
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"{": "{",
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"}": "}",
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// Reserved.
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"(": "(",
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")": ")",
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"[": "[",
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"]": "]",
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"+": "+",
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"?": "?",
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"!": "!",
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};
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/**
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* Escape text for stringify to path.
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*/
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function escapeText(str) {
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return str.replace(/[{}()\[\]+?!:*]/g, "\\$&");
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}
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/**
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* Escape a regular expression string.
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*/
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function escape(str) {
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return str.replace(/[.+*?^${}()[\]|/\\]/g, "\\$&");
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}
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/**
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* Tokenize input string.
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*/
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function* lexer(str) {
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const chars = [...str];
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let i = 0;
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function name() {
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let value = "";
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if (ID_START.test(chars[++i])) {
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value += chars[i];
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while (ID_CONTINUE.test(chars[++i])) {
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value += chars[i];
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}
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}
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else if (chars[i] === '"') {
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let pos = i;
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while (i < chars.length) {
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if (chars[++i] === '"') {
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i++;
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pos = 0;
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break;
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}
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if (chars[i] === "\\") {
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value += chars[++i];
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}
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else {
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value += chars[i];
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}
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}
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if (pos) {
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throw new TypeError(`Unterminated quote at ${pos}: ${DEBUG_URL}`);
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}
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}
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if (!value) {
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throw new TypeError(`Missing parameter name at ${i}: ${DEBUG_URL}`);
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}
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return value;
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}
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while (i < chars.length) {
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const value = chars[i];
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const type = SIMPLE_TOKENS[value];
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if (type) {
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yield { type, index: i++, value };
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}
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else if (value === "\\") {
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yield { type: "ESCAPED", index: i++, value: chars[i++] };
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}
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else if (value === ":") {
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const value = name();
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yield { type: "PARAM", index: i, value };
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}
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else if (value === "*") {
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const value = name();
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yield { type: "WILDCARD", index: i, value };
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}
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else {
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yield { type: "CHAR", index: i, value: chars[i++] };
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}
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}
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return { type: "END", index: i, value: "" };
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}
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class Iter {
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constructor(tokens) {
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this.tokens = tokens;
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}
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peek() {
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if (!this._peek) {
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const next = this.tokens.next();
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this._peek = next.value;
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}
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return this._peek;
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}
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tryConsume(type) {
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const token = this.peek();
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if (token.type !== type)
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return;
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this._peek = undefined; // Reset after consumed.
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return token.value;
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}
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consume(type) {
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const value = this.tryConsume(type);
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if (value !== undefined)
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return value;
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const { type: nextType, index } = this.peek();
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throw new TypeError(`Unexpected ${nextType} at ${index}, expected ${type}: ${DEBUG_URL}`);
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}
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text() {
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let result = "";
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let value;
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while ((value = this.tryConsume("CHAR") || this.tryConsume("ESCAPED"))) {
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result += value;
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}
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return result;
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}
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}
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/**
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* Tokenized path instance.
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*/
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class TokenData {
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constructor(tokens) {
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this.tokens = tokens;
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}
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}
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exports.TokenData = TokenData;
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/**
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* Parse a string for the raw tokens.
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*/
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function parse(str, options = {}) {
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const { encodePath = NOOP_VALUE } = options;
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const it = new Iter(lexer(str));
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function consume(endType) {
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const tokens = [];
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while (true) {
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const path = it.text();
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if (path)
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tokens.push({ type: "text", value: encodePath(path) });
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const param = it.tryConsume("PARAM");
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if (param) {
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tokens.push({
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type: "param",
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name: param,
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});
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continue;
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}
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const wildcard = it.tryConsume("WILDCARD");
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if (wildcard) {
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tokens.push({
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type: "wildcard",
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name: wildcard,
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});
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continue;
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}
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const open = it.tryConsume("{");
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if (open) {
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tokens.push({
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type: "group",
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tokens: consume("}"),
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});
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continue;
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}
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it.consume(endType);
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return tokens;
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}
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}
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const tokens = consume("END");
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return new TokenData(tokens);
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}
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/**
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* Compile a string to a template function for the path.
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*/
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function compile(path, options = {}) {
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const { encode = encodeURIComponent, delimiter = DEFAULT_DELIMITER } = options;
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const data = path instanceof TokenData ? path : parse(path, options);
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const fn = tokensToFunction(data.tokens, delimiter, encode);
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return function path(data = {}) {
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const [path, ...missing] = fn(data);
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if (missing.length) {
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throw new TypeError(`Missing parameters: ${missing.join(", ")}`);
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}
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return path;
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};
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}
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function tokensToFunction(tokens, delimiter, encode) {
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const encoders = tokens.map((token) => tokenToFunction(token, delimiter, encode));
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return (data) => {
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const result = [""];
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for (const encoder of encoders) {
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const [value, ...extras] = encoder(data);
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result[0] += value;
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result.push(...extras);
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}
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return result;
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};
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}
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/**
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* Convert a single token into a path building function.
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*/
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function tokenToFunction(token, delimiter, encode) {
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if (token.type === "text")
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return () => [token.value];
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if (token.type === "group") {
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const fn = tokensToFunction(token.tokens, delimiter, encode);
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return (data) => {
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const [value, ...missing] = fn(data);
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if (!missing.length)
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return [value];
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return [""];
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};
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}
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const encodeValue = encode || NOOP_VALUE;
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if (token.type === "wildcard" && encode !== false) {
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return (data) => {
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const value = data[token.name];
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if (value == null)
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return ["", token.name];
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if (!Array.isArray(value) || value.length === 0) {
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throw new TypeError(`Expected "${token.name}" to be a non-empty array`);
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}
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return [
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value
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.map((value, index) => {
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if (typeof value !== "string") {
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throw new TypeError(`Expected "${token.name}/${index}" to be a string`);
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}
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return encodeValue(value);
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})
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.join(delimiter),
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];
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};
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}
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return (data) => {
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const value = data[token.name];
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if (value == null)
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return ["", token.name];
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if (typeof value !== "string") {
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throw new TypeError(`Expected "${token.name}" to be a string`);
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}
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return [encodeValue(value)];
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};
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}
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/**
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* Transform a path into a match function.
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*/
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function match(path, options = {}) {
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const { decode = decodeURIComponent, delimiter = DEFAULT_DELIMITER } = options;
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const { regexp, keys } = pathToRegexp(path, options);
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const decoders = keys.map((key) => {
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if (decode === false)
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return NOOP_VALUE;
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if (key.type === "param")
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return decode;
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return (value) => value.split(delimiter).map(decode);
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});
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return function match(input) {
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const m = regexp.exec(input);
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if (!m)
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return false;
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const path = m[0];
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const params = Object.create(null);
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for (let i = 1; i < m.length; i++) {
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if (m[i] === undefined)
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continue;
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const key = keys[i - 1];
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const decoder = decoders[i - 1];
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params[key.name] = decoder(m[i]);
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}
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return { path, params };
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};
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}
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function pathToRegexp(path, options = {}) {
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const { delimiter = DEFAULT_DELIMITER, end = true, sensitive = false, trailing = true, } = options;
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const keys = [];
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const sources = [];
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const flags = sensitive ? "" : "i";
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const paths = Array.isArray(path) ? path : [path];
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const items = paths.map((path) => path instanceof TokenData ? path : parse(path, options));
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for (const { tokens } of items) {
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for (const seq of flatten(tokens, 0, [])) {
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const regexp = sequenceToRegExp(seq, delimiter, keys);
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sources.push(regexp);
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}
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}
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let pattern = `^(?:${sources.join("|")})`;
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if (trailing)
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pattern += `(?:${escape(delimiter)}$)?`;
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pattern += end ? "$" : `(?=${escape(delimiter)}|$)`;
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const regexp = new RegExp(pattern, flags);
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return { regexp, keys };
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}
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/**
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* Generate a flat list of sequence tokens from the given tokens.
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*/
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function* flatten(tokens, index, init) {
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if (index === tokens.length) {
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return yield init;
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}
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const token = tokens[index];
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if (token.type === "group") {
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const fork = init.slice();
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for (const seq of flatten(token.tokens, 0, fork)) {
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yield* flatten(tokens, index + 1, seq);
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}
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}
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else {
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init.push(token);
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}
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yield* flatten(tokens, index + 1, init);
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}
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/**
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* Transform a flat sequence of tokens into a regular expression.
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*/
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function sequenceToRegExp(tokens, delimiter, keys) {
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let result = "";
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let backtrack = "";
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let isSafeSegmentParam = true;
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for (let i = 0; i < tokens.length; i++) {
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const token = tokens[i];
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if (token.type === "text") {
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result += escape(token.value);
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backtrack += token.value;
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isSafeSegmentParam || (isSafeSegmentParam = token.value.includes(delimiter));
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continue;
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}
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if (token.type === "param" || token.type === "wildcard") {
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if (!isSafeSegmentParam && !backtrack) {
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throw new TypeError(`Missing text after "${token.name}": ${DEBUG_URL}`);
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}
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if (token.type === "param") {
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result += `(${negate(delimiter, isSafeSegmentParam ? "" : backtrack)}+)`;
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}
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else {
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result += `([\\s\\S]+)`;
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}
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keys.push(token);
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backtrack = "";
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isSafeSegmentParam = false;
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continue;
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}
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}
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return result;
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}
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function negate(delimiter, backtrack) {
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if (backtrack.length < 2) {
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if (delimiter.length < 2)
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return `[^${escape(delimiter + backtrack)}]`;
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return `(?:(?!${escape(delimiter)})[^${escape(backtrack)}])`;
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}
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if (delimiter.length < 2) {
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return `(?:(?!${escape(backtrack)})[^${escape(delimiter)}])`;
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}
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return `(?:(?!${escape(backtrack)}|${escape(delimiter)})[\\s\\S])`;
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}
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/**
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* Stringify token data into a path string.
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*/
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function stringify(data) {
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return data.tokens
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.map(function stringifyToken(token, index, tokens) {
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if (token.type === "text")
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return escapeText(token.value);
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if (token.type === "group") {
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return `{${token.tokens.map(stringifyToken).join("")}}`;
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}
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const isSafe = isNameSafe(token.name) && isNextNameSafe(tokens[index + 1]);
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const key = isSafe ? token.name : JSON.stringify(token.name);
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if (token.type === "param")
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return `:${key}`;
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if (token.type === "wildcard")
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|
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return `*${key}`;
|
||
|
|
throw new TypeError(`Unexpected token: ${token}`);
|
||
|
|
})
|
||
|
|
.join("");
|
||
|
|
}
|
||
|
|
function isNameSafe(name) {
|
||
|
|
const [first, ...rest] = name;
|
||
|
|
if (!ID_START.test(first))
|
||
|
|
return false;
|
||
|
|
return rest.every((char) => ID_CONTINUE.test(char));
|
||
|
|
}
|
||
|
|
function isNextNameSafe(token) {
|
||
|
|
if ((token === null || token === void 0 ? void 0 : token.type) !== "text")
|
||
|
|
return true;
|
||
|
|
return !ID_CONTINUE.test(token.value[0]);
|
||
|
|
}
|
||
|
|
//# sourceMappingURL=index.js.map
|