Feature/swagger UI (#34)

.github/workflows/pr_checks.yml

@@ -5,10 +5,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - name: Set up JDK 1.14
-        uses: actions/setup-java@v1
+      - name: Set up JDK 11
+        uses: actions/setup-java@v2
         with:
-          java-version: 1.14
+          distribution: 'adopt'
+          java-version: '11'
       - name: Cache Gradle packages
         uses: actions/cache@v2
         with:
@@ -21,10 +22,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - name: Set up JDK 1.14
-        uses: actions/setup-java@v1
+      - name: Set up JDK 11
+        uses: actions/setup-java@v2
         with:
-          java-version: 1.14
+          distribution: 'adopt'
+          java-version: '11'
       - name: Cache Gradle packages
         uses: actions/cache@v2
         with:

.github/workflows/publish.yml

@@ -7,9 +7,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-java@v1
+      - uses: actions/setup-java@v2
         with:
-          java-version: 1.14
+          distribution: 'adopt'
+          java-version: '11'
       - name: Cache Gradle packages
         uses: actions/cache@v2
         with:

CHANGELOG.md

@@ -1,5 +1,16 @@
 # Changelog
 
+## [0.6.1] - April 23rd, 2021
+
+### Added
+
+- Added support for Swagger ui
+
+### Changed
+
+- Set jvm target to 11
+- Resolved bug for empty params and/or empty response body 
+
 ## [0.6.0] - April 21st, 2021
 
 ### Added

README.md

@@ -146,11 +146,11 @@ A minimal example would be:
   install(Authentication) {
     notarizedBasic("basic") {
       realm = "Ktor realm 1"
-    // ...
+      // configure basic authentication provider..
     }
     notarizedJwt("jwt") {
       realm = "Ktor realm 2"
-      // ...
+      // configure jwt authentication provider...
     }
   }
   routing {
@@ -181,7 +181,17 @@ A minimal example would be:
   }
 ```
 
-
+### Enabling Swagger ui
+To enable Swagger UI, `kompendium-swagger-ui` needs to be added.
+This will also add the [ktor webjars feature](https://ktor.io/docs/webjars.html) to your classpath as it is required for swagger ui.
+Minimal Example:
+```kotlin
+  install(Webjars)
+  routing {
+    openApi()
+    swaggerUI()
+  }
+```
 
 ## Limitations
 

build.gradle.kts

@@ -25,7 +25,7 @@ allprojects {
 
   tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile>().configureEach {
     kotlinOptions {
-      jvmTarget = "14"
+      jvmTarget = "11"
     }
   }
 

gradle.properties

@@ -1,5 +1,5 @@
 # Kompendium
-project.version=0.6.0
+project.version=0.6.1
 # Kotlin
 kotlin.code.style=official
 # Gradle

gradle/libs.versions.toml

@@ -3,6 +3,7 @@ kotlin = "1.4.32"
 ktor = "1.5.3"
 slf4j = "1.7.30"
 logback = "1.2.3"
+swagger-ui = "3.47.1"
 
 [libraries]
 # API
@@ -12,12 +13,16 @@ ktor-jackson = { group = "io.ktor", name = "ktor-jackson", version.ref = "ktor"
 ktor-html-builder = { group = "io.ktor", name = "ktor-html-builder", version.ref = "ktor" }
 ktor-auth-lib = { group = "io.ktor", name = "ktor-auth", version.ref = "ktor" }
 ktor-auth-jwt = { group = "io.ktor", name = "ktor-auth-jwt", version.ref = "ktor" }
+ktor-webjars = { group = "io.ktor", name = "ktor-webjars", version.ref = "ktor" }
 
 # Logging
 slf4j = { group = "org.slf4j", name = "slf4j-api", version.ref = "slf4j" }
 logback-classic = { group = "ch.qos.logback", name = "logback-classic", version.ref = "logback" }
 logback-core = { group = "ch.qos.logback", name = "logback-core", version.ref = "logback" }
 
+# webjars
+webjars-swagger-ui = { group "org.webjars", name = "swagger-ui", version.ref = "swagger-ui" }
+
 [bundles]
 ktor = [ "ktor-server-core", "ktor-server-netty", "ktor-jackson", "ktor-html-builder" ]
 ktorAuth = [ "ktor-auth-lib", "ktor-auth-jwt" ]

kompendium-core/src/main/kotlin/org/leafygreens/kompendium/Kompendium.kt

@@ -33,6 +33,7 @@ import org.leafygreens.kompendium.models.oas.OpenApiSpecResponse
 import org.leafygreens.kompendium.models.oas.OpenApiSpecSchemaRef
 import org.leafygreens.kompendium.path.CorePathCalculator
 import org.leafygreens.kompendium.path.PathCalculator
+import org.leafygreens.kompendium.util.Helpers
 import org.leafygreens.kompendium.util.Helpers.getReferenceSlug
 
 object Kompendium {
@@ -123,37 +124,36 @@ object Kompendium {
   }
 
   // TODO These two lookin' real similar 👀 Combine?
-  private fun KType.toRequestSpec(requestInfo: RequestInfo?): OpenApiSpecRequest? = when (this) {
-    Unit::class -> null
-    else -> when (requestInfo) {
+  private fun KType.toRequestSpec(requestInfo: RequestInfo?): OpenApiSpecRequest? = when (requestInfo) {
     null -> null
-      else -> OpenApiSpecRequest(
+    else -> {
+      OpenApiSpecRequest(
         description = requestInfo.description,
-        content = requestInfo.mediaTypes.associateWith {
-          val ref = getReferenceSlug()
-          OpenApiSpecMediaType.Referenced(OpenApiSpecReferenceObject(ref))
-        }
+        content = resolveContent(requestInfo.mediaTypes) ?: mapOf()
       )
     }
   }
 
-  private fun KType.toResponseSpec(responseInfo: ResponseInfo?): Pair<Int, OpenApiSpecResponse>? = when (this) {
-    Unit::class -> null // TODO Maybe not though? could be unit but 200 🤔
-    else -> when (responseInfo) {
+  private fun KType.toResponseSpec(responseInfo: ResponseInfo?): Pair<Int, OpenApiSpecResponse>? = when (responseInfo) {
     null -> null // TODO again probably revisit this
     else -> {
-        val content = responseInfo.mediaTypes.associateWith {
-          val ref = getReferenceSlug()
-          OpenApiSpecMediaType.Referenced(OpenApiSpecReferenceObject(ref))
-        }
       val specResponse = OpenApiSpecResponse(
         description = responseInfo.description,
-          content = content.ifEmpty { null }
+        content = resolveContent(responseInfo.mediaTypes)
       )
       Pair(responseInfo.status, specResponse)
     }
   }
+
+  private fun KType.resolveContent(mediaTypes: List<String>): Map<String, OpenApiSpecMediaType>? {
+    return if (this != Helpers.UNIT_TYPE && mediaTypes.isNotEmpty()) {
+      mediaTypes.associateWith {
+        val ref = getReferenceSlug()
+        OpenApiSpecMediaType.Referenced(OpenApiSpecReferenceObject(ref))
       }
+    } else null
+  }
+
 
   // TODO God these annotations make this hideous... any way to improve?
   private fun KType.toParameterSpec(): List<OpenApiSpecParameter> {

kompendium-core/src/main/kotlin/org/leafygreens/kompendium/util/Helpers.kt

@@ -11,6 +11,7 @@ import kotlin.reflect.KProperty
 import kotlin.reflect.KType
 import kotlin.reflect.jvm.javaField
 import org.slf4j.LoggerFactory
+import kotlin.reflect.full.createType
 
 object Helpers {
 
@@ -18,6 +19,7 @@ object Helpers {
 
   const val COMPONENT_SLUG = "#/components/schemas"
 
+  val UNIT_TYPE by lazy { Unit::class.createType() }
 
   /**
    * Simple extension function that will take a [Pair] and place it (if absent) into a [MutableMap].

kompendium-core/src/test/kotlin/org/leafygreens/kompendium/KompendiumTest.kt

@@ -324,6 +324,22 @@ internal class KompendiumTest {
     }
   }
 
+  @Test
+  fun `Can notarize route with no request params and no response body`() {
+    withTestApplication({
+      configModule()
+      docs()
+      emptyGet()
+    }) {
+      // do
+      val json = handleRequest(HttpMethod.Get, "/openapi.json").response.content
+
+      // expect
+      val expected = TestData.getFileSnapshot("no_request_params_and_no_response_body.json").trim()
+      assertEquals(expected, json, "The received json spec should match the expected content")
+    }
+  }
+
   @Test
   fun `Generates the expected redoc`() {
     withTestApplication({
@@ -351,6 +367,7 @@ internal class KompendiumTest {
     val testPostInfo = MethodInfo("Test post endpoint", "Post your tests here!", testPostResponse, testRequest)
     val testPutInfo = MethodInfo("Test put endpoint", "Put your tests here!", testPostResponse, testRequest)
     val testDeleteInfo = MethodInfo("Test delete endpoint", "testing my deletes", testDeleteResponse)
+    val emptyTestGetInfo = MethodInfo("No request params and response body", "testing more")
   }
 
   private fun Application.configModule() {
@@ -486,6 +503,16 @@ internal class KompendiumTest {
     }
   }
 
+  private fun Application.emptyGet() {
+    routing {
+      route("/test/empty") {
+        notarizedGet<Unit, Unit>(emptyTestGetInfo) {
+          call.respond(HttpStatusCode.OK)
+        }
+      }
+    }
+  }
+
   private val oas = Kompendium.openApiSpec.copy(
     info = OpenApiSpecInfo(
       title = "Test API",

kompendium-core/src/test/resources/no_request_params_and_no_response_body.json

@@ -0,0 +1,42 @@
+{
+  "openapi" : "3.0.3",
+  "info" : {
+    "title" : "Test API",
+    "version" : "1.33.7",
+    "description" : "An amazing, fully-ish \uD83D\uDE09 generated API spec",
+    "termsOfService" : "https://example.com",
+    "contact" : {
+      "name" : "Homer Simpson",
+      "url" : "https://gph.is/1NPUDiM",
+      "email" : "chunkylover53@aol.com"
+    },
+    "license" : {
+      "name" : "MIT",
+      "url" : "https://github.com/lg-backbone/kompendium/blob/main/LICENSE"
+    }
+  },
+  "servers" : [ {
+    "url" : "https://myawesomeapi.com",
+    "description" : "Production instance of my API"
+  }, {
+    "url" : "https://staging.myawesomeapi.com",
+    "description" : "Where the fun stuff happens"
+  } ],
+  "paths" : {
+    "/test/empty" : {
+      "get" : {
+        "tags" : [ ],
+        "summary" : "No request params and response body",
+        "description" : "testing more",
+        "parameters" : [ ],
+        "deprecated" : false
+      }
+    }
+  },
+  "components" : {
+    "schemas" : { },
+    "securitySchemes" : { }
+  },
+  "security" : [ ],
+  "tags" : [ ]
+}

kompendium-playground/build.gradle.kts

@@ -8,6 +8,7 @@ dependencies {
 
   implementation(projects.kompendiumCore)
   implementation(projects.kompendiumAuth)
+  implementation(projects.kompendiumSwaggerUi)
 
   implementation(libs.bundles.ktor)
   implementation(libs.bundles.ktorAuth)

kompendium-playground/src/main/kotlin/org/leafygreens/kompendium/playground/Main.kt

@@ -9,12 +9,15 @@ import io.ktor.auth.Authentication
 import io.ktor.auth.authenticate
 import io.ktor.auth.UserIdPrincipal
 import io.ktor.features.ContentNegotiation
+import io.ktor.http.HttpStatusCode
 import io.ktor.jackson.jackson
+import io.ktor.response.respond
 import io.ktor.response.respondText
 import io.ktor.routing.route
 import io.ktor.routing.routing
 import io.ktor.server.engine.embeddedServer
 import io.ktor.server.netty.Netty
+import io.ktor.webjars.Webjars
 import java.net.URI
 import org.leafygreens.kompendium.Kompendium
 import org.leafygreens.kompendium.Kompendium.notarizedDelete
@@ -40,6 +43,7 @@ import org.leafygreens.kompendium.playground.KompendiumTOC.testSinglePostInfo
 import org.leafygreens.kompendium.playground.KompendiumTOC.testSinglePutInfo
 import org.leafygreens.kompendium.routes.openApi
 import org.leafygreens.kompendium.routes.redoc
+import org.leafygreens.kompendium.swagger.swaggerUI
 import org.leafygreens.kompendium.util.KompendiumHttpCodes
 
 private val oas = Kompendium.openApiSpec.copy(
@@ -100,11 +104,13 @@ fun Application.mainModule() {
         }
       }
     }
+    install(Webjars)
     featuresInstalled = true
   }
   routing {
     openApi(oas)
     redoc(oas)
+    swaggerUI()
     route("/test") {
       route("/{id}") {
         notarizedGet<ExampleParams, ExampleResponse>(testIdGetInfo) {
@@ -128,7 +134,7 @@ fun Application.mainModule() {
       authenticate("basic") {
         route("/authenticated/single") {
           notarizedGet<Unit, Unit>(testAuthenticatedSingleGetInfo) {
-            call.respondText("get authentiticated single")
+            call.respond(HttpStatusCode.OK)
           }
         }
       }

kompendium-swagger-ui/build.gradle.kts

@@ -0,0 +1,39 @@
+plugins {
+  `java-library`
+  `maven-publish`
+}
+
+dependencies {
+  implementation(platform("org.jetbrains.kotlin:kotlin-bom"))
+  implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
+  implementation(libs.bundles.ktor)
+  api(libs.ktor.webjars)
+  implementation(libs.webjars.swagger.ui)
+  testImplementation("org.jetbrains.kotlin:kotlin-test")
+  testImplementation("org.jetbrains.kotlin:kotlin-test-junit")
+  testImplementation("com.fasterxml.jackson.module:jackson-module-kotlin:2.12.0")
+  testImplementation("io.ktor:ktor-server-test-host:1.5.3")
+}
+
+java {
+  withSourcesJar()
+}
+
+publishing {
+  repositories {
+    maven {
+      name = "GithubPackages"
+      url = uri("https://maven.pkg.github.com/lg-backbone/kompendium")
+      credentials {
+        username = System.getenv("GITHUB_ACTOR")
+        password = System.getenv("GITHUB_TOKEN")
+      }
+    }
+  }
+  publications {
+    create<MavenPublication>("kompendium") {
+      from(components["kotlin"])
+      artifact(tasks.sourcesJar)
+    }
+  }
+}

kompendium-swagger-ui/src/main/kotlin/org/leafygreens/kompendium/swagger/SwaggerUI.kt

@@ -0,0 +1,12 @@
+package org.leafygreens.kompendium.swagger
+
+import io.ktor.application.call
+import io.ktor.response.respondRedirect
+import io.ktor.routing.Routing
+import io.ktor.routing.get
+
+fun Routing.swaggerUI(openApiJsonUrl: String = "/openapi.json") {
+  get("/swagger-ui") {
+    call.respondRedirect("/webjars/swagger-ui/index.html?url=$openApiJsonUrl", true)
+  }
+}

settings.gradle.kts

@@ -1,6 +1,7 @@
 rootProject.name = "kompendium"
 include("kompendium-core")
 include("kompendium-auth")
+include("kompendium-swagger-ui")
 include("kompendium-playground")
 
 // Feature Previews