next/dist/shared/lib/router/utils/route-regex.js

The React Framework

"use strict";
Object.defineProperty(exports, "__esModule", {
    value: true
});
exports.getRouteRegex = getRouteRegex;
exports.getNamedRouteRegex = getNamedRouteRegex;
exports.getMiddlewareRegex = getMiddlewareRegex;
exports.getNamedMiddlewareRegex = getNamedMiddlewareRegex;
var _extends = require("@swc/helpers/lib/_extends.js").default;
var _escapeRegexp = require("../../escape-regexp");
var _removeTrailingSlash = require("./remove-trailing-slash");
function getRouteRegex(normalizedRoute) {
    const { parameterizedRoute , groups  } = getParametrizedRoute(normalizedRoute);
    return {
        re: new RegExp(`^${parameterizedRoute}(?:/)?$`),
        groups: groups
    };
}
function getNamedRouteRegex(normalizedRoute) {
    const result = getNamedParametrizedRoute(normalizedRoute);
    return _extends({}, getRouteRegex(normalizedRoute), {
        namedRegex: `^${result.namedParameterizedRoute}(?:/)?$`,
        routeKeys: result.routeKeys
    });
}
function getParametrizedRoute(route) {
    const segments = (0, _removeTrailingSlash).removeTrailingSlash(route).slice(1).split('/');
    const groups = {};
    let groupIndex = 1;
    return {
        parameterizedRoute: segments.map((segment)=>{
            if (segment.startsWith('[') && segment.endsWith(']')) {
                const { key , optional , repeat  } = parseParameter(segment.slice(1, -1));
                groups[key] = {
                    pos: groupIndex++,
                    repeat,
                    optional
                };
                return repeat ? optional ? '(?:/(.+?))?' : '/(.+?)' : '/([^/]+?)';
            } else {
                return `/${(0, _escapeRegexp).escapeStringRegexp(segment)}`;
            }
        }).join(''),
        groups
    };
}
function getNamedParametrizedRoute(route) {
    const segments = (0, _removeTrailingSlash).removeTrailingSlash(route).slice(1).split('/');
    const getSafeRouteKey = buildGetSafeRouteKey();
    const routeKeys = {};
    return {
        namedParameterizedRoute: segments.map((segment)=>{
            if (segment.startsWith('[') && segment.endsWith(']')) {
                const { key , optional , repeat  } = parseParameter(segment.slice(1, -1));
                // replace any non-word characters since they can break
                // the named regex
                let cleanedKey = key.replace(/\W/g, '');
                let invalidKey = false;
                // check if the key is still invalid and fallback to using a known
                // safe key
                if (cleanedKey.length === 0 || cleanedKey.length > 30) {
                    invalidKey = true;
                }
                if (!isNaN(parseInt(cleanedKey.slice(0, 1)))) {
                    invalidKey = true;
                }
                if (invalidKey) {
                    cleanedKey = getSafeRouteKey();
                }
                routeKeys[cleanedKey] = key;
                return repeat ? optional ? `(?:/(?<${cleanedKey}>.+?))?` : `/(?<${cleanedKey}>.+?)` : `/(?<${cleanedKey}>[^/]+?)`;
            } else {
                return `/${(0, _escapeRegexp).escapeStringRegexp(segment)}`;
            }
        }).join(''),
        routeKeys
    };
}
/**
 * Parses a given parameter from a route to a data structure that can be used
 * to generate the parametrized route. Examples:
 *   - `[...slug]` -> `{ name: 'slug', repeat: true, optional: true }`
 *   - `[foo]` -> `{ name: 'foo', repeat: false, optional: true }`
 *   - `bar` -> `{ name: 'bar', repeat: false, optional: false }`
 */ function parseParameter(param) {
    const optional = param.startsWith('[') && param.endsWith(']');
    if (optional) {
        param = param.slice(1, -1);
    }
    const repeat = param.startsWith('...');
    if (repeat) {
        param = param.slice(3);
    }
    return {
        key: param,
        repeat,
        optional
    };
}
/**
 * Builds a function to generate a minimal routeKey using only a-z and minimal
 * number of characters.
 */ function buildGetSafeRouteKey() {
    let routeKeyCharCode = 97;
    let routeKeyCharLength = 1;
    return ()=>{
        let routeKey = '';
        for(let i = 0; i < routeKeyCharLength; i++){
            routeKey += String.fromCharCode(routeKeyCharCode);
            routeKeyCharCode++;
            if (routeKeyCharCode > 122) {
                routeKeyCharLength++;
                routeKeyCharCode = 97;
            }
        }
        return routeKey;
    };
}
function getMiddlewareRegex(normalizedRoute, options) {
    const { parameterizedRoute , groups  } = getParametrizedRoute(normalizedRoute);
    const { catchAll =true  } = options != null ? options : {};
    if (parameterizedRoute === '/') {
        let catchAllRegex = catchAll ? '.*' : '';
        return {
            groups: {},
            re: new RegExp(`^/${catchAllRegex}$`)
        };
    }
    let catchAllGroupedRegex = catchAll ? '(?:(/.*)?)' : '';
    return {
        groups: groups,
        re: new RegExp(`^${parameterizedRoute}${catchAllGroupedRegex}$`)
    };
}
function getNamedMiddlewareRegex(normalizedRoute, options) {
    const { parameterizedRoute  } = getParametrizedRoute(normalizedRoute);
    const { catchAll =true  } = options;
    if (parameterizedRoute === '/') {
        let catchAllRegex = catchAll ? '.*' : '';
        return {
            namedRegex: `^/${catchAllRegex}$`
        };
    }
    const { namedParameterizedRoute  } = getNamedParametrizedRoute(normalizedRoute);
    let catchAllGroupedRegex = catchAll ? '(?:(/.*)?)' : '';
    return {
        namedRegex: `^${namedParameterizedRoute}${catchAllGroupedRegex}$`
    };
}

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