Get Tags #157 (#176)

src/main/kotlin/io/github/nomisrev/env/Dependencies.kt

@@ -3,7 +3,9 @@ package io.github.nomisrev.env
 import arrow.fx.coroutines.continuations.ResourceScope
 import com.sksamuel.cohort.HealthCheckRegistry
 import com.sksamuel.cohort.hikari.HikariConnectionsHealthCheck
+import io.github.nomisrev.repo.TagPersistence
 import io.github.nomisrev.repo.articleRepo
+import io.github.nomisrev.repo.tagPersistence
 import io.github.nomisrev.repo.userPersistence
 import io.github.nomisrev.service.ArticleService
 import io.github.nomisrev.service.JwtService
@@ -19,14 +21,16 @@ class Dependencies(
   val userService: UserService,
   val jwtService: JwtService,
   val articleService: ArticleService,
-  val healthCheck: HealthCheckRegistry
+  val healthCheck: HealthCheckRegistry,
+  val tagPersistence: TagPersistence
 )
 
 suspend fun ResourceScope.dependencies(env: Env): Dependencies {
   val hikari = hikari(env.dataSource)
   val sqlDelight = sqlDelight(hikari)
   val userRepo = userPersistence(sqlDelight.usersQueries)
   val articleRepo = articleRepo(sqlDelight.articlesQueries, sqlDelight.tagsQueries)
+  val tagPersistence = tagPersistence(sqlDelight.tagsQueries)
   val jwtService = jwtService(env.auth, userRepo)
   val slugGenerator = slugifyGenerator()
   val userService = userService(userRepo, jwtService)
@@ -40,6 +44,7 @@ suspend fun ResourceScope.dependencies(env: Env): Dependencies {
     userService,
     jwtService,
     articleService(slugGenerator, articleRepo, userRepo),
-    checks
+    checks,
+    tagPersistence
   )
 }

src/main/kotlin/io/github/nomisrev/main.kt

@@ -8,6 +8,7 @@ import io.github.nomisrev.env.Env
 import io.github.nomisrev.env.configure
 import io.github.nomisrev.env.dependencies
 import io.github.nomisrev.routes.health
+import io.github.nomisrev.routes.tagRoutes
 import io.github.nomisrev.routes.userRoutes
 import io.ktor.server.application.Application
 import io.ktor.server.netty.Netty
@@ -26,4 +27,5 @@ fun Application.app(module: Dependencies) {
   configure()
   userRoutes(module.userService, module.jwtService)
   health(module.healthCheck)
+  tagRoutes(module.tagPersistence)
 }

src/main/kotlin/io/github/nomisrev/repo/TagPersistence.kt

@@ -0,0 +1,13 @@
+package io.github.nomisrev.repo
+
+import io.github.nomisrev.sqldelight.TagsQueries
+
+interface TagPersistence {
+  /** List all tags * */
+  suspend fun selectTags(): List<String>
+}
+
+fun tagPersistence(tags: TagsQueries) =
+  object : TagPersistence {
+    override suspend fun selectTags() = tags.selectTags().executeAsList()
+  }

src/main/kotlin/io/github/nomisrev/routes/tags.kt

@@ -0,0 +1,24 @@
+@file:Suppress("MatchingDeclarationName")
+
+package io.github.nomisrev.routes
+
+import io.github.nomisrev.repo.TagPersistence
+import io.ktor.server.application.Application
+import io.ktor.server.application.call
+import io.ktor.server.response.respond
+import io.ktor.server.routing.get
+import io.ktor.server.routing.route
+import io.ktor.server.routing.routing
+import kotlinx.serialization.Serializable
+
+@Serializable data class TagsResponse(val tags: List<String>)
+
+fun Application.tagRoutes(tagPersistence: TagPersistence) = routing {
+  route("/tags") {
+    /* Registration: GET /api/tags */
+    get {
+      val tags = tagPersistence.selectTags()
+      call.respond(TagsResponse(tags))
+    }
+  }
+}

src/main/kotlin/io/github/nomisrev/service/ArticleService.kt

@@ -32,7 +32,9 @@ fun articleService(
     override suspend fun createArticle(input: CreateArticle): Either<DomainError, Article> =
       either {
         val slug =
-          slugGenerator.generateSlug(input.title) { slug -> articlePersistence.exists(slug) }.bind()
+          slugGenerator
+            .generateSlug(input.title) { slug -> articlePersistence.exists(slug).not() }
+            .bind()
         val createdAt = OffsetDateTime.now()
         val articleId =
           articlePersistence

src/test/kotlin/io/github/nomisrev/routes/TagRouteSpec.kt

@@ -0,0 +1,63 @@
+package io.github.nomisrev.routes
+
+import arrow.core.flatMap
+import io.github.nefilim.kjwt.JWSHMAC512Algorithm
+import io.github.nefilim.kjwt.JWT
+import io.github.nomisrev.repo.UserId
+import io.github.nomisrev.service.CreateArticle
+import io.github.nomisrev.service.RegisterUser
+import io.github.nomisrev.withServer
+import io.kotest.assertions.arrow.core.shouldBeRight
+import io.kotest.assertions.arrow.core.shouldBeSome
+import io.kotest.core.spec.style.StringSpec
+import io.kotest.matchers.collections.shouldHaveSize
+import io.kotest.matchers.shouldBe
+import io.ktor.client.call.body
+import io.ktor.client.request.get
+import io.ktor.http.ContentType
+import io.ktor.http.HttpStatusCode
+import io.ktor.http.contentType
+
+class TagRouteSpec :
+  StringSpec({
+    // User
+    val validUsername = "username2"
+    val validEmail = "[email protected]"
+    val validPw = "123456789"
+    // Article
+    val validTags = setOf("arrow", "ktor", "kotlin", "sqldelight")
+    val validTitle = "Fake Article Arrow "
+    val validDescription = "This is a fake article description."
+    val validBody = "Lorem ipsum dolor sit amet, consectetur adipiscing elit."
+
+    "Check for empty list retrieval" {
+      withServer {
+        val response = get("/tags") { contentType(ContentType.Application.Json) }
+
+        response.status shouldBe HttpStatusCode.OK
+        response.body<TagsResponse>().tags.toSet() shouldBe validTags
+      }
+    }
+
+    "Can get all tags" {
+      withServer { dependencies ->
+        val userId =
+          dependencies.userService
+            .register(RegisterUser(validUsername, validEmail, validPw))
+            .flatMap { JWT.decodeT(it.value, JWSHMAC512Algorithm) }
+            .map { it.claimValueAsLong("id").shouldBeSome() }
+            .shouldBeRight()
+
+        dependencies.articleService
+          .createArticle(
+            CreateArticle(UserId(userId), validTitle, validDescription, validBody, validTags)
+          )
+          .shouldBeRight()
+
+        val response = get("/tags") { contentType(ContentType.Application.Json) }
+
+        response.status shouldBe HttpStatusCode.OK
+        response.body<TagsResponse>().tags shouldHaveSize 4
+      }
+    }
+  })