| 'use strict'; |
|
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| const Assert = require('@hapi/hoek/lib/assert'); |
|
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| const Uri = require('./uri'); |
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| const internals = {}; |
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| exports.regex = function (options = {}) { |
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| |
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| Assert(options.cidr === undefined || typeof options.cidr === 'string', 'options.cidr must be a string'); |
| const cidr = options.cidr ? options.cidr.toLowerCase() : 'optional'; |
| Assert(['required', 'optional', 'forbidden'].includes(cidr), 'options.cidr must be one of required, optional, forbidden'); |
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| |
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| Assert(options.version === undefined || typeof options.version === 'string' || Array.isArray(options.version), 'options.version must be a string or an array of string'); |
| let versions = options.version || ['ipv4', 'ipv6', 'ipvfuture']; |
| if (!Array.isArray(versions)) { |
| versions = [versions]; |
| } |
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| Assert(versions.length >= 1, 'options.version must have at least 1 version specified'); |
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| for (let i = 0; i < versions.length; ++i) { |
| Assert(typeof versions[i] === 'string', 'options.version must only contain strings'); |
| versions[i] = versions[i].toLowerCase(); |
| Assert(['ipv4', 'ipv6', 'ipvfuture'].includes(versions[i]), 'options.version contains unknown version ' + versions[i] + ' - must be one of ipv4, ipv6, ipvfuture'); |
| } |
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| versions = Array.from(new Set(versions)); |
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| |
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| const parts = versions.map((version) => { |
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| |
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| if (cidr === 'forbidden') { |
| return Uri.ip[version]; |
| } |
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| |
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| const cidrpart = `\\/${version === 'ipv4' ? Uri.ip.v4Cidr : Uri.ip.v6Cidr}`; |
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| if (cidr === 'required') { |
| return `${Uri.ip[version]}${cidrpart}`; |
| } |
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| |
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| return `${Uri.ip[version]}(?:${cidrpart})?`; |
| }); |
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| const raw = `(?:${parts.join('|')})`; |
| const regex = new RegExp(`^${raw}$`); |
| return { cidr, versions, regex, raw }; |
| }; |
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|
