@loopback/rest/dist/router/route-sort.js

"use strict";
// Copyright IBM Corp. and LoopBack contributors 2018,2020. All Rights Reserved.
// Node module: @loopback/rest
// This file is licensed under the MIT License.
// License text available at https://opensource.org/licenses/MIT
Object.defineProperty(exports, "__esModule", { value: true });
exports.compareRoute = void 0;
const path_to_regexp_1 = require("path-to-regexp");
/**
 * Sorting order for http verbs
 */
const HTTP_VERBS = {
    post: 1,
    put: 2,
    patch: 3,
    get: 4,
    head: 5,
    delete: 6,
    options: 7,
};
/**
 * Compare two routes by verb/path for sorting
 * @param route1 - First route entry
 * @param route2 - Second route entry
 */
function compareRoute(route1, route2) {
    // First check the path tokens
    const path1 = route1.path.replace(/{([^}]*)}(\/|$)/g, ':$1$2');
    const path2 = route2.path.replace(/{([^}]*)}(\/|$)/g, ':$1$2');
    const tokensForPath1 = toTokens(path1);
    const tokensForPath2 = toTokens(path2);
    const length = tokensForPath1.length > tokensForPath2.length
        ? tokensForPath1.length
        : tokensForPath2.length;
    for (let i = 0; i < length; i++) {
        const token1 = tokensForPath1[i];
        const token2 = tokensForPath2[i];
        if (token1 === token2)
            continue;
        if (token1 === undefined)
            return 1;
        if (token2 === undefined)
            return -1;
        if (token1 < token2)
            return -1;
        if (token1 > token2)
            return 1;
    }
    // Then check verb
    const verb1 = HTTP_VERBS[route1.verb.toLowerCase()] || HTTP_VERBS.get;
    const verb2 = HTTP_VERBS[route2.verb.toLowerCase()] || HTTP_VERBS.get;
    if (verb1 !== verb2)
        return verb1 - verb2;
    return 0;
}
exports.compareRoute = compareRoute;
/**
 *
 * @param path - Parse a path template into tokens
 */
function toTokens(path) {
    const tokens = [];
    (0, path_to_regexp_1.parse)(path).forEach(p => {
        if (typeof p === 'string') {
            // The string can be /orders/count
            tokens.push(...p.split('/').filter(Boolean));
        }
        else {
            // Use `{}` for wildcard as they are larger than any other ascii chars
            tokens.push(`{}`);
        }
    });
    return tokens;
}
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