Api endpoint for image crops

media-api/app/MediaApiComponents.scala

@@ -37,6 +37,7 @@ class MediaApiComponents(context: Context) extends GridComponents(context, new M
   val usageController = new UsageController(auth, config, elasticSearch, usageQuota, controllerComponents)
   val elasticSearchHealthCheck = new ElasticSearchHealthCheck(controllerComponents, elasticSearch)
   val healthcheckController = new Management(controllerComponents, buildInfo)
+  val configurationController = new ConfigurationController(controllerComponents)
   val InnerServiceStatusCheckController = new InnerServiceStatusCheckController(auth, controllerComponents, config.services, wsClient)
 
   override val router = new Routes(
@@ -45,6 +46,7 @@ class MediaApiComponents(context: Context) extends GridComponents(context, new M
     suggestionController,
     aggController,
     usageController,
+    configurationController,
     elasticSearchHealthCheck,
     healthcheckController,
     InnerServiceStatusCheckController

media-api/app/controllers/ConfigurationController.scala

@@ -0,0 +1,11 @@
+package controllers
+
+import lib.crops.CropOption
+import play.api.libs.json.Json
+import play.api.mvc.{BaseController, ControllerComponents}
+
+class ConfigurationController(override val controllerComponents: ControllerComponents) extends BaseController {
+    // The contents of this endpoint is not sensitive, so to avoid unnecessary complexity we have not
+    // put authentication on this
+    def cropVariations = Action { _ => Ok(Json.toJson(CropOption.supported)) }
+}

media-api/app/lib/crops/CropOption.scala

@@ -0,0 +1,15 @@
+package lib.crops
+
+import play.api.libs.json.{Json, OFormat}
+
+case class CropOption(key: String, ratio: String, ratioString: String)
+
+object CropOption {
+  implicit val jf: OFormat[CropOption] = Json.format[CropOption]
+  val supported = List(
+    CropOption("landscape", "5 / 4", "5:4"),
+    CropOption("portrait", "4 / 5", "4:5"),
+    CropOption("video", "16 / 9", "16:9"),
+    CropOption("square", "1", "1:1"),
+  )
+}

media-api/conf/routes

@@ -39,6 +39,9 @@ GET     /usage/suppliers/:id                                        controllers.
 GET     /usage/quotas                                               controllers.UsageController.quotas
 GET     /usage/quotas/:id                                           controllers.UsageController.quotaForImage(id: String)
 
+# configuration
+GET     /configuration/crop-variations                              controllers.ConfigurationController.cropVariations
+
 # Management
 GET     /management/healthcheck                                     com.gu.mediaservice.lib.management.ElasticSearchHealthCheck.healthCheck
 GET     /management/manifest                                        com.gu.mediaservice.lib.management.Management.manifest