feature #14: Add routes for get follows of one citizen

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

@@ -0,0 +1,43 @@
+package fr.dcproject.routes
+
+import Paths
+import fr.dcproject.entity.Citizen
+import fr.dcproject.entity.User
+import io.ktor.application.call
+import io.ktor.http.HttpStatusCode
+import io.ktor.locations.KtorExperimentalLocationsAPI
+import io.ktor.locations.delete
+import io.ktor.locations.get
+import io.ktor.locations.post
+import io.ktor.response.respond
+import io.ktor.routing.Route
+import org.joda.time.DateTime
+import java.util.*
+import fr.dcproject.entity.Follow as FollowEntity
+import fr.dcproject.repository.FollowArticle as FollowArticleRepository
+
+// TODO get current citizen
+val currentCitizen = Citizen(
+    id = UUID.fromString("64b7b379-2298-43ec-b428-ba134930cabd"),
+    name = Citizen.Name("todo", "todo"),
+    birthday = DateTime.now(),
+    user = User(username = "plop", plainPassword = "plip")
+)
+
+@KtorExperimentalLocationsAPI
+fun Route.followArticle(repo: FollowArticleRepository) {
+    post<Paths.ArticleFollowRequest> {
+        repo.follow(FollowEntity(target = it.article, citizen = currentCitizen))
+        call.respond(HttpStatusCode.Created)
+    }
+
+    delete<Paths.ArticleFollowRequest> {
+        repo.unfollow(FollowEntity(target = it.article, citizen = currentCitizen))
+        call.respond(HttpStatusCode.NoContent)
+    }
+
+    get<Paths.CitizenFollowArticleRequest> {
+        val follows = repo.findByCitizenId(it.citizen)
+        call.respond(follows)
+    }
+}