AdminAuthHandler.kt

@KtorExperimentalAPI
@KtorExperimentalLocationsAPI
fun Route.adminAuthHandler(service: AdminBusinessLogic = AdminService()) {

    post<Admin.Auth.SignIn> {
        val request = call.receive<AdminSignInRequest>()
        if (request.isNotValid())
            throw BadRequestException("Incorrect request")
        val admin = service.authenticate(request.name!!, request.password!!)
        val generatedToken = JwtConfig.makeToken(admin)
        call.respond(AdminSignInResponse(generatedToken, admin))
    }
}

AdminLocations.kt

@KtorExperimentalLocationsAPI
@Location("/admin")
class Admin {

    @Location("/manage")
    data class Manage(val admin: Admin) {

        @Location("/find-user-by-phone")
        data class FindUserByPhone(val manage: Manage, var phoneNumber: String, val page: Int = 1, val count: Int = 10)

        @Location("/parking-contracts")
        data class ParkingContracts(val manage: Manage, val page: Int = 1, val count: Int = 10)

        @Location("/add-user-parking-spot")
        data class AddUserParkingSpot(val manage: Manage, val page: Int = 1, val count: Int = 10)

        @Location("/remove-user-parking-spot")
        data class RemoveUserParkingSpot(val manage: Manage, val page: Int = 1, val count: Int = 10)
    }

    @Location("/auth")
    data class Auth(val admin: Admin) {

        @Location("/sign-in")
        data class SignIn(val auth: Auth)
    }
}

AdminSignInRequest.kt

data class AdminSignInRequest(
    val name: String?,
    val password: String?
){
    fun isValid() = !name.isNullOrBlank() && !password.isNullOrBlank()

}

build.gradle.kts

plugins {
    // Support for Kotlin
    id("org.jetbrains.kotlin.jvm") version "1.3.61"
    // Support for building a CLI application
    application
    // FatJar
    id("com.github.johnrengelman.shadow") version "5.0.0"
    // Documentation
    id("org.jetbrains.dokka") version "0.10.1"
}

application {
    mainClassName = "com.easythings.parkkometr.AppKt"
    group = "com.easythings"
    version = "0.0.1"
}

sourceSets {
    main {
        java.srcDir("app/main/src")
        resources.srcDir("app/main/resources")
    }
    test {
        java.srcDir("app/test/src/")
        resources.srcDir("app/test/resources/")
    }
}

repositories {
    jcenter()
    maven { setUrl("https://kotlin.bintray.com/ktor") }
}

dependencies {
    val ktorVersion: String by project
    val logbackVersion: String by project
    val exposedVersion: String by project
    val pgVersion: String by project
    val spekVersion: String by project
    val sendGridVersion: String by project
    val assertJVersion: String by project

    // Kotlin ==========================================================================================================
    implementation(platform("org.jetbrains.kotlin:kotlin-bom"))
    implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")

    // Libs ============================================================================================================
    // Ktor - framework
    implementation("io.ktor", "ktor-server-jetty", ktorVersion)
    implementation("io.ktor", "ktor-server-core", ktorVersion)
    implementation("io.ktor", "ktor-server-host-common", ktorVersion)
    implementation("io.ktor", "ktor-auth", ktorVersion)
    implementation("io.ktor", "ktor-auth-jwt", ktorVersion)
    implementation("io.ktor", "ktor-gson", ktorVersion)
    implementation("io.ktor", "ktor-network-tls-certificates", ktorVersion)
    implementation("io.ktor", "ktor-locations", ktorVersion)

    // Logback - application logger
    implementation("ch.qos.logback", "logback-classic", logbackVersion)

    // Exposed - orm
    implementation("org.jetbrains.exposed", "exposed-core", exposedVersion)
    implementation("org.jetbrains.exposed", "exposed-dao", exposedVersion)
    implementation("org.jetbrains.exposed", "exposed-jdbc", exposedVersion)
    implementation("org.jetbrains.exposed", "exposed-jodatime", exposedVersion)

    // Postgresql - database driver
    implementation("org.postgresql", "postgresql", pgVersion)

    // SendGrid - mailer
    implementation("com.sendgrid", "sendgrid-java", sendGridVersion)

    // Tests ===========================================================================================================
    testImplementation("org.jetbrains.kotlin", "kotlin-test")
    testImplementation("org.jetbrains.kotlin", "kotlin-test-junit")

    // Ktor test lib - default
    testImplementation("io.ktor", "ktor-server-tests", ktorVersion)

    // Speak - test lib
    testImplementation("org.spekframework.spek2", "spek-dsl-jvm", spekVersion)
    testRuntimeOnly("org.spekframework.spek2", "spek-runner-junit5", spekVersion)

    // Speak requires kotlin-reflect, can be omitted if already in the classpath
    testRuntimeOnly("org.jetbrains.kotlin", "kotlin-reflect")

    // AssertJ - more readable assertion methods
    testImplementation("org.assertj", "assertj-core", assertJVersion)
}

tasks {
    dokka {
        outputDirectory = "$buildDir/docs/dokka"
        outputFormat = "html"
    }

    test {
        useJUnitPlatform {
            includeEngines("spek2")
        }
    }

    shadowJar {
        manifest {
            attributes(
                    mapOf("Main-Class" to application.mainClassName)
            )
        }
        mergeServiceFiles()
    }
}

gradle.properties

kotlin.code.style=official
ktorVersion=1.3.2
kotlinVersion=1.3.61
logbackVersion=1.2.1
exposedVersion=0.21.1
pgVersion=42.2.2
spekVersion=2.0.10
sendGridVersion=4.4.5
assertJVersion=3.15.0