Feat/low resources mode (#61)

* Add a flag to disable resources which are not supported in low level
machines

* Rename variable to make it clear

src/main/resources/application.conf

@@ -5,6 +5,11 @@ server {
   port = ${?PORT}
 }
 
+app {
+  lowResourcesMode = false
+  lowResourcesMode = ${?LOW_RESOURCES}
+}
+
 api {
   service = "pitaya"
   context = "api"

src/main/scala/org/juanitodread/pitayafinch/model/Errors.scala

@@ -0,0 +1,10 @@
+package org.juanitodread.pitayafinch.model
+
+sealed abstract class PitayaError(title: String, msg: String) extends Exception(msg) {
+  def getTitle: String = title
+  def message: String
+}
+
+case class ResourceNotAvailable(
+  title: String = "ResourceNotAvailable",
+  message: String) extends PitayaError(title, message)

src/main/scala/org/juanitodread/pitayafinch/routes/Endpoints.scala

@@ -8,6 +8,7 @@ import io.circe.{ Encoder, Json }
 import io.finch._
 import io.finch.circe.dropNullValues._
 
+import org.juanitodread.pitayafinch.model.PitayaError
 import org.juanitodread.pitayafinch.routes.cookbook.CookbookEndpoints
 import org.juanitodread.pitayafinch.routes.nlp.NlpEndpoints
 
@@ -36,6 +37,12 @@ object HandleErrorsAsJson extends Logging {
       toJson("InvalidJSONProperty", error.getMessage)
   }
 
+  def pitayaErrorToJson(ex: PitayaError): Json = ex match {
+    case _ =>
+      info(ex)
+      toJson(ex.getTitle, ex.message)
+  }
+
   private def toJson(error: String, message: String) = {
     Json.obj(
       "error" -> Json.fromString(error),
@@ -45,5 +52,6 @@ object HandleErrorsAsJson extends Logging {
   implicit val errorEncoder: Encoder[Exception] = Encoder.instance {
     case error: Error => errorToJson(error)
     case Errors(errors) => Json.arr(errors.toList.map(errorToJson): _*)
+    case ex: PitayaError => pitayaErrorToJson(ex)
   }
 }

src/main/scala/org/juanitodread/pitayafinch/routes/nlp/tools/entities/EntitiesEndpoint.scala

@@ -6,17 +6,23 @@ import io.finch._
 import io.finch.catsEffect._
 import io.finch.circe._
 
+import org.juanitodread.pitayafinch.model.ResourceNotAvailable
 import org.juanitodread.pitayafinch.model.nlp.entities._
 import org.juanitodread.pitayafinch.nlp.tools.entities._
 import org.juanitodread.pitayafinch.routes.nlp.NlpEndpoint
+import org.juanitodread.pitayafinch.utils.AppConf
 
-object EntitiesEndpoint extends NlpEndpoint {
+object EntitiesEndpoint extends NlpEndpoint with AppConf {
   private final val entitiesPath = basePath :: "entities"
 
   private val postedEntities: Endpoint[IO, EntitiesRequest] = jsonBody[EntitiesRequest]
   def getEntities(): Endpoint[IO, EntitiesResponse] = post(entitiesPath :: postedEntities) { request: EntitiesRequest =>
-    Ok(EntitiesResponse(
-      request.text,
-      EntityRecognizer(request.text)))
+    if (lowResourcesMode) {
+      Conflict(ResourceNotAvailable(message = "This resource is not allowed when running in low resources mode"))
+    } else {
+      Ok(EntitiesResponse(
+        request.text,
+        EntityRecognizer(request.text)))
+    }
   }
 }

src/main/scala/org/juanitodread/pitayafinch/utils/AppConf.scala

@@ -1,19 +1,25 @@
 package org.juanitodread.pitayafinch.utils
 
-import com.typesafe.config.ConfigFactory
+import com.typesafe.config.{ Config, ConfigFactory }
 
 trait AppConf {
   private[this] val config = ConfigFactory.load()
 
+  // app
+  private[this] val appCfg: Config = config.getConfig("app")
+
   // server
-  private[this] val server = config.getConfig("server")
+  private[this] val server: Config = config.getConfig("server")
 
   // api
-  private[this] val apiCfg = config.getConfig("api")
+  private[this] val apiCfg: Config = config.getConfig("api")
+
+  // public app conf
+  val lowResourcesMode = appCfg.getBoolean("lowResourcesMode")
 
   // public server conf
-  val serverCtx = server.getString("context")
-  val port = server.getString("port")
+  val serverCtx: String = server.getString("context")
+  val port: String = server.getString("port")
 
   // public api conf
   val serviceName = apiCfg.getString("service")

src/test/scala/org/juanitodread/pitayafinch/nlp/tools/entities/fixtures/EntityRecognizerFixture.scala

@@ -6,7 +6,6 @@ import org.juanitodread.pitayafinch.nlp.tools.entities.EntityRecognizer
 import org.juanitodread.pitayafinch.nlp.tools.entities.models._
 
 object EntityRecognizerFixture extends NumberFormatter {
-  println("ENTRE AL FIXTURE: EntityRecognizerFixture")
   private final val recognizers = List(
     DateEntityModel(),
     LocationEntityModel(),