feature #7: Add routes for comment article

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

@@ -0,0 +1,55 @@
+package fr.dcproject.routes
+
+import fr.dcproject.citizen
+import fr.dcproject.entity.Citizen
+import fr.dcproject.security.voter.CommentVoter.Action.CREATE
+import fr.dcproject.security.voter.CommentVoter.Action.VIEW
+import fr.dcproject.security.voter.assertCan
+import io.ktor.application.call
+import io.ktor.http.HttpStatusCode
+import io.ktor.locations.KtorExperimentalLocationsAPI
+import io.ktor.locations.Location
+import io.ktor.locations.get
+import io.ktor.locations.post
+import io.ktor.request.receive
+import io.ktor.response.respond
+import io.ktor.routing.Route
+import fr.dcproject.entity.Article as ArticleEntity
+import fr.dcproject.entity.Comment as CommentEntity
+import fr.dcproject.repository.CommentArticle as CommentArticleRepository
+
+@KtorExperimentalLocationsAPI
+object CommentArticlePaths {
+    @Location("/articles/{article}/comments") class ArticleCommentRequest(val article: ArticleEntity)
+    @Location("/citizens/{citizen}/comments/articles") class CitizenCommentArticleRequest(val citizen: Citizen)
+}
+
+@KtorExperimentalLocationsAPI
+fun Route.commentArticle(repo: CommentArticleRepository) {
+    get<CommentArticlePaths.ArticleCommentRequest> {
+        assertCan(VIEW, it.article)
+
+        val comment = repo.findByTarget(it.article)
+
+        call.respond(HttpStatusCode.OK, comment)
+    }
+
+    post<CommentArticlePaths.ArticleCommentRequest> {
+        assertCan(CREATE, it.article)
+
+        val content = call.receive<String>()
+        val comment = CommentEntity(
+            target = it.article,
+            createdBy = citizen,
+            content = content
+        )
+        repo.comment(comment)
+
+        call.respond(HttpStatusCode.Created, comment)
+    }
+
+    get<CommentArticlePaths.CitizenCommentArticleRequest> {
+        val comments = repo.findByCitizen(it.citizen)
+        call.respond(comments)
+    }
+}