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import { IPv4, IPv6, parse, subnetMatch } from 'ipaddr.js'
import { CONFIG } from '../initializers/config'
import { UserModel } from '../models/user/user'
const isCidr = require('is-cidr')
async function isSignupAllowed (): Promise<{ allowed: boolean, errorMessage?: string }> {
if (CONFIG.SIGNUP.ENABLED === false) {
return { allowed: false }
}
// No limit and signup is enabled
if (CONFIG.SIGNUP.LIMIT === -1) {
return { allowed: true }
}
const totalUsers = await UserModel.countTotal()
return { allowed: totalUsers < CONFIG.SIGNUP.LIMIT }
}
function isSignupAllowedForCurrentIP (ip: string) {
if (!ip) return false
const addr = parse(ip)
const excludeList = [ 'blacklist' ]
let matched = ''
// if there is a valid, non-empty whitelist, we exclude all unknown adresses too
if (CONFIG.SIGNUP.FILTERS.CIDR.WHITELIST.filter(cidr => isCidr(cidr)).length > 0) {
excludeList.push('unknown')
}
if (addr.kind() === 'ipv4') {
const addrV4 = IPv4.parse(ip)
const rangeList = {
whitelist: CONFIG.SIGNUP.FILTERS.CIDR.WHITELIST.filter(cidr => isCidr.v4(cidr))
.map(cidr => IPv4.parseCIDR(cidr)),
blacklist: CONFIG.SIGNUP.FILTERS.CIDR.BLACKLIST.filter(cidr => isCidr.v4(cidr))
.map(cidr => IPv4.parseCIDR(cidr))
}
matched = subnetMatch(addrV4, rangeList, 'unknown')
} else if (addr.kind() === 'ipv6') {
const addrV6 = IPv6.parse(ip)
const rangeList = {
whitelist: CONFIG.SIGNUP.FILTERS.CIDR.WHITELIST.filter(cidr => isCidr.v6(cidr))
.map(cidr => IPv6.parseCIDR(cidr)),
blacklist: CONFIG.SIGNUP.FILTERS.CIDR.BLACKLIST.filter(cidr => isCidr.v6(cidr))
.map(cidr => IPv6.parseCIDR(cidr))
}
matched = subnetMatch(addrV6, rangeList, 'unknown')
}
return !excludeList.includes(matched)
}
// ---------------------------------------------------------------------------
export {
isSignupAllowed,
isSignupAllowedForCurrentIP
}
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