feature #9: Add routes for login

src/main/kotlin/fr/dcproject/routes/Auth.kt

@@ -0,0 +1,29 @@
+package fr.dcproject.routes
+
+import Paths
+import com.fasterxml.jackson.databind.exc.MismatchedInputException
+import fr.dcproject.JwtConfig
+import io.ktor.application.call
+import io.ktor.auth.UserPasswordCredential
+import io.ktor.features.BadRequestException
+import io.ktor.locations.KtorExperimentalLocationsAPI
+import io.ktor.locations.post
+import io.ktor.request.receive
+import io.ktor.response.respondText
+import io.ktor.routing.Route
+import io.ktor.util.KtorExperimentalAPI
+import fr.dcproject.repository.User as UserRepository
+
+@KtorExperimentalLocationsAPI
+@KtorExperimentalAPI
+fun Route.auth(repo: UserRepository) {
+    post <Paths.LoginRequest> {
+        try {
+            val credentials = call.receive<UserPasswordCredential>()
+            val user = repo.findByCredentials(credentials) ?: throw BadRequestException("Username not exist or password is wrong")
+            call.respondText(JwtConfig.makeToken(user))
+        } catch (e: MismatchedInputException) {
+            throw BadRequestException("You must be send name and password to the request")
+        }
+    }
+}