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/*
* This file is part of LibEuFin.
* Copyright (C) 2019 Stanisci and Dold.
* LibEuFin is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation; either version 3, or
* (at your option) any later version.
* LibEuFin is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General
* Public License for more details.
* You should have received a copy of the GNU Affero General Public
* License along with LibEuFin; see the file COPYING. If not, see
* <http://www.gnu.org/licenses/>
*/
package tech.libeufin.nexus
import com.github.ajalt.clikt.output.CliktHelpFormatter
import com.github.ajalt.clikt.parameters.arguments.argument
import org.jetbrains.exposed.sql.transactions.transaction
import org.slf4j.Logger
import org.slf4j.LoggerFactory
import tech.libeufin.util.CryptoUtil.hashpw
import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
import com.github.ajalt.clikt.parameters.types.int
import execThrowableOrTerminate
import com.github.ajalt.clikt.core.*
import com.github.ajalt.clikt.parameters.options.*
import io.ktor.server.application.*
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.launch
import startServer
import tech.libeufin.nexus.iso20022.NexusPaymentInitiationData
import tech.libeufin.nexus.iso20022.createPain001document
import tech.libeufin.nexus.iso20022.parseCamtMessage
import tech.libeufin.nexus.server.EbicsDialects
import tech.libeufin.nexus.server.nexusApp
import tech.libeufin.util.*
import java.io.File
import kotlin.system.exitProcess
val logger: Logger = LoggerFactory.getLogger("tech.libeufin.nexus")
const val NEXUS_DB_ENV_VAR_NAME = "LIBEUFIN_NEXUS_DB_CONNECTION"
class NexusCommand : CliktCommand() {
init { versionOption(getVersion()) }
override fun run() = Unit
}
class Serve : CliktCommand("Run nexus HTTP server") {
init {
context {
helpFormatter = CliktHelpFormatter(showDefaultValues = true)
}
}
private val localhostOnly by option(
"--localhost-only",
help = "Bind only to localhost. On all interfaces otherwise"
).flag("--no-localhost-only", default = true)
private val ipv4Only by option(
"--ipv4-only",
help = "Bind only to ipv4"
).flag(default = false)
// Prevent IPv6 mode:
// private val host by option().default("127.0.0.1")
private val port by option().int().default(5001)
private val withUnixSocket by option(
help = "Bind the Sandbox to the Unix domain socket at PATH. Overrides" +
" --port, when both are given", metavar = "PATH"
)
private val logLevel by option()
override fun run() {
setLogLevel(logLevel)
execThrowableOrTerminate { dbCreateTables(getDbConnFromEnv(NEXUS_DB_ENV_VAR_NAME)) }
CoroutineScope(Dispatchers.IO).launch(fallback) { whileTrueOperationScheduler() }
if (withUnixSocket != null) {
startServer(
withUnixSocket!!,
app = nexusApp
)
exitProcess(0)
}
logger.info("Starting Nexus on port ${this.port}")
startServerWithIPv4Fallback(
options = StartServerOptions(
ipv4OnlyOpt = this.ipv4Only,
localhostOnlyOpt = this.localhostOnly,
portOpt = this.port
),
app = nexusApp
)
}
}
/**
* This command purpose is to let the user then _manually_
* tune the pain.001, to upload it to online verifiers.
*/
class GenPain : CliktCommand(
"Generate random pain.001 document for 'pf' dialect, printing to STDOUT."
) {
private val logLevel by option(
help = "Set the log level to: 'off', 'error', 'warn', 'info', 'debug', 'trace', 'all'"
)
private val dialect by option(
help = "EBICS dialect using the pain.001 being generated. Defaults to 'pf' (PostFinance)",
).default("pf")
override fun run() {
setLogLevel(logLevel)
val pain001 = createPain001document(
NexusPaymentInitiationData(
debtorIban = "CH0889144371988976754",
debtorBic = "POFICHBEXXX",
debtorName = "Sample Debtor Name",
currency = "CHF",
amount = "5.00",
creditorIban = "CH9789144829733648596",
creditorName = "Sample Creditor Name",
creditorBic = "POFICHBEXXX",
paymentInformationId = "8aae7a2ded2f",
preparationTimestamp = getNow().toInstant().toEpochMilli(),
subject = "Unstructured remittance information",
instructionId = "InstructionId",
endToEndId = "71cfbdaf901f",
messageId = "2a16b35ed69c"
),
dialect = this.dialect
)
println(pain001)
}
}
class ParseCamt : CliktCommand("Parse camt.05x file, outputs JSON in libEufin internal representation.") {
private val logLevel by option(
help = "Set the log level to: 'off', 'error', 'warn', 'info', 'debug', 'trace', 'all'"
)
private val withPfDialect by option(
help = "Set the dialect to 'pf' (PostFinance). If not given, it defaults to GLS."
).flag(default = false)
private val filename by argument("FILENAME", "File in CAMT format")
override fun run() {
setLogLevel(logLevel)
val camtText = File(filename).readText(Charsets.UTF_8)
val dialect = if (withPfDialect) EbicsDialects.POSTFINANCE.dialectName else null
val res = parseCamtMessage(XMLUtil.parseStringIntoDom(camtText), dialect)
println(jacksonObjectMapper().writerWithDefaultPrettyPrinter().writeValueAsString(res))
}
}
class ResetTables : CliktCommand("Drop all the tables from the database") {
init {
context {
helpFormatter = CliktHelpFormatter(showDefaultValues = true)
}
}
override fun run() {
val dbConnString = getDbConnFromEnv(NEXUS_DB_ENV_VAR_NAME)
execThrowableOrTerminate {
dbDropTables(dbConnString)
dbCreateTables(dbConnString)
}
}
}
class Superuser : CliktCommand("Add superuser or change pw") {
private val username by argument("USERNAME", "User name of superuser")
private val password by option().prompt(requireConfirmation = true, hideInput = true)
override fun run() {
execThrowableOrTerminate {
dbCreateTables(getDbConnFromEnv(NEXUS_DB_ENV_VAR_NAME))
}
transaction {
val hashedPw = hashpw(password)
val user = NexusUserEntity.find { NexusUsersTable.username eq username }.firstOrNull()
if (user == null) {
NexusUserEntity.new {
this.username = this@Superuser.username
this.passwordHash = hashedPw
this.superuser = true
}
} else {
if (!user.superuser) {
System.err.println("Can only change password for superuser with this command.")
throw ProgramResult(1)
}
user.passwordHash = hashedPw
}
}
}
}
fun main(args: Array<String>) {
NexusCommand()
.subcommands(Serve(), Superuser(), ParseCamt(), ResetTables(), GenPain())
.main(args)
}
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