edgerender/request.js

Render at the edge

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.as_path_view = exports.clean_path = void 0;
const utils_1 = require("./utils");
const MethodStrings = ['GET', 'POST', 'PUT', 'PATCH', 'DELETE', 'OPTIONS'];
const clean_path = (pathname) => pathname.replace(/\/+$/, '') || '/';
exports.clean_path = clean_path;
function as_path_view([key, view]) {
    if (typeof view == 'function') {
        view = { view };
    }
    let allow;
    if (view.allow == undefined) {
        allow = new Set(['GET']);
    }
    else if (typeof view.allow == 'string') {
        allow = new Set([view.allow]);
    }
    else {
        allow = new Set(view.allow);
    }
    const invalid = [...allow].filter(m => !MethodStrings.includes(m));
    if (invalid.length) {
        throw new Error(`${invalid.join(', ')} is not a valid method, should be: ${MethodStrings.join(', ')}`);
    }
    return { path: parse_path(key), view: view.view, allow };
}
exports.as_path_view = as_path_view;
const group_regex = /{(\w+)(?::(.+?))?}([^{]*)/g;
function parse_path(path) {
    if (!path.startsWith('/')) {
        path = '/' + path;
    }
    if (!path.includes('{')) {
        if (path.includes('}')) {
            throw new Error(`invalid path "${path}", "}" with no matching start "{"`);
        }
        else {
            return exports.clean_path(path);
        }
    }
    let regex_str = '';
    let first = true;
    let last_ended = 0;
    for (const m of path.matchAll(group_regex)) {
        if (first) {
            regex_str += utils_1.escape_regex(path.substr(0, m.index));
            first = false;
        }
        regex_str += `(?<${m[1]}>${make_regex(m[2])})${utils_1.escape_regex(m[3])}`;
        last_ended = (m.index || 0) + m[0].length;
    }
    if (last_ended != path.length) {
        throw new Error(`invalid path, match expression "${path}" can't be interpreted`);
    }
    regex_str = `^${exports.clean_path(regex_str)}$`;
    return new RegExp(regex_str);
}
const word_regex = '[\\w\\-]+';
function make_regex(group) {
    if (!group || group == 'word') {
        return word_regex;
    }
    else if (group == 'int') {
        return '\\d+';
    }
    else {
        return group;
    }
}
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