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Adding ability to convert play responses and parsers.
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Flavian Alexandru
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Mar 15, 2016
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14 changes: 14 additions & 0 deletions
14
util-domain/src/main/scala/com/websudos/util/domain/ApiError.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,14 @@ | ||
| package com.websudos.util.domain | ||
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| case class ApiErrorResponse( | ||
| code: Int, | ||
| messages: List[String] | ||
| ) | ||
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| case class ApiError(error: ApiErrorResponse) | ||
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| object ApiError { | ||
| def fromArgs(code: Int, messages: List[String]): ApiError = { | ||
| ApiError(ApiErrorResponse(code, messages)) | ||
| } | ||
| } |
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80 changes: 80 additions & 0 deletions
80
util-play/src/main/scala/com/websudos/util/play/package.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| package com.websudos.util | ||
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| import _root_.play.api.data.validation.ValidationError | ||
| import _root_.play.api.libs.json.{JsValue, JsPath, Json} | ||
| import _root_.play.api.mvc.{Results, Result} | ||
| import com.websudos.util.domain.{ApiErrorResponse, ApiError} | ||
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| import scala.concurrent.Future | ||
| import scala.util.control.NoStackTrace | ||
| import scalaz.NonEmptyList | ||
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| package object play { | ||
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| protected[this] final val defaultErrorCode = 400 | ||
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| implicit val apiErrorResponseFormat = Json.format[ApiErrorResponse] | ||
| implicit val apiErrorFormat = Json.format[ApiError] | ||
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| implicit class NelAugmenter(val list: NonEmptyList[String]) extends AnyVal { | ||
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| def response: Result = { | ||
| Results.BadRequest(Json.toJson(ApiError(ApiErrorResponse(defaultErrorCode, list.list)))) | ||
| } | ||
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| def futureResponse(): Future[Result] = { | ||
| Future.successful(response) | ||
| } | ||
| } | ||
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| implicit class ParseErrorAugmenter(val errors: Seq[(JsPath, Seq[ValidationError])]) extends AnyVal { | ||
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| def errorMessages: List[String] = errors.toList.map { | ||
| case (path, validations) => { | ||
| s"${path.toJsonString} -> ${validations.map(_.message).mkString(", ")}" | ||
| } | ||
| } | ||
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| def asException: Exception with NoStackTrace = { | ||
| new RuntimeException(errorMessages.mkString(", ")) with NoStackTrace | ||
| } | ||
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| /** | ||
| * This will transform a list of accumulated errors to a JSON body that's usable as a response format. | ||
| * From a non empty liust of errors this will produce something in the following format: | ||
| * | ||
| * {{{ | ||
| * { | ||
| * "error": { | ||
| * "code": 400, | ||
| * "messages": [ | ||
| * "this is an error message", | ||
| * "this is another error message | ||
| * ] | ||
| * } | ||
| * } | ||
| * }}} | ||
| * | ||
| * @return | ||
| */ | ||
| def apiError: ApiError = ApiError.fromArgs(defaultErrorCode, errorMessages) | ||
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| def toJson: JsValue = Json.toJson(apiError) | ||
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| def response: Result = Results.BadRequest(toJson) | ||
| } | ||
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| def errorResponse(msg: String, code: Int = defaultErrorCode): Result = { | ||
| Results.BadRequest(Json.toJson(ApiError.fromArgs(code, List(msg)))) | ||
| } | ||
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| implicit class ResultAugmenter(val res: Result) { | ||
| def future: Future[Result] = { | ||
| Future.successful(res) | ||
| } | ||
| } | ||
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| def malformedJson(): Result = { | ||
| errorResponse("Malformed or missing JSON body") | ||
| } | ||
| } |
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