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zio.http.gen.scala.Code.scala Maven / Gradle / Ivy
package zio.http.gen.scala
import scala.meta.Term
import scala.meta.prettyprinters.XtensionSyntax
import zio.http.gen.openapi
import zio.http.gen.openapi.Config.NormalizeFields
import zio.http.{Method, Status}
sealed trait Code extends Product with Serializable
object Code {
sealed trait ScalaType extends Code { self =>
def seq(nonEmpty: Boolean): Collection.Seq = Collection.Seq(self, nonEmpty)
def set(nonEmpty: Boolean): Collection.Set = Collection.Set(self, nonEmpty)
def map: Collection.Map = Collection.Map(self, None)
def opt: Collection.Opt = Collection.Opt(self)
}
object ScalaType {
case object Inferred extends ScalaType
case object Unit extends ScalaType
case object JsonAST extends ScalaType
final case class Or(left: ScalaType, right: ScalaType) extends ScalaType
}
final case class TypeRef(name: String) extends ScalaType
final case class Files(files: List[File]) extends Code
final case class File(
path: List[String],
pkgPath: List[String],
imports: List[Import],
objects: List[Object],
caseClasses: List[CaseClass],
enums: List[Enum],
) extends Code
sealed trait Import extends Code
object Import {
def apply(name: String): Import = Absolute(name)
final case class Absolute(path: String) extends Import
final case class FromBase(path: String) extends Import
}
final case class Object(
name: String,
extensions: List[String],
schema: Option[Object.SchemaCode],
endpoints: Map[Field, EndpointCode],
objects: List[Object],
caseClasses: List[CaseClass],
enums: List[Enum],
) extends ScalaType
object Object {
/**
* This is a means to provide implicit codec/schema in different ways. e.g.
* deriving with macros, or manual transforming on a primitive type.
*/
sealed trait SchemaCode {
def codecLineWithStringBuilder(typeName: String, sb: StringBuilder): Unit
}
object SchemaCode {
case object DeriveSchemaGen extends SchemaCode {
override def codecLineWithStringBuilder(typeName: String, sb: StringBuilder): Unit = {
sb ++= " implicit val codec: Schema["
sb ++= typeName
sb ++= "] = DeriveSchema.gen["
sb ++= typeName
sb += ']'
}
}
case class AliasedNewtype(primitiveType: String) extends SchemaCode {
override def codecLineWithStringBuilder(typeName: String, sb: StringBuilder): Unit = {
sb ++= " implicit val schema: Schema["
sb ++= typeName
sb ++= ".Type] = Schema.primitive["
sb ++= primitiveType
sb ++= "].transform(wrap, unwrap)"
}
}
}
def withDefaultSchemaDerivation(
name: String,
extensions: List[String],
endpoints: Map[Field, EndpointCode],
objects: List[Object],
caseClasses: List[CaseClass],
enums: List[Enum],
): Object =
Object(name, extensions, Some(SchemaCode.DeriveSchemaGen), endpoints, objects, caseClasses, enums)
def schemaCompanion(str: String): Object = withDefaultSchemaDerivation(
name = str,
extensions = Nil,
endpoints = Map.empty,
objects = Nil,
caseClasses = Nil,
enums = Nil,
)
def apply(name: String, endpoints: Map[Field, EndpointCode]): Object =
new Object(
name = name,
extensions = Nil,
schema = None,
endpoints = endpoints,
objects = Nil,
caseClasses = Nil,
enums = Nil,
)
}
final case class CaseClass(name: String, fields: List[Field], companionObject: Option[Object], mixins: List[String])
extends ScalaType
object CaseClass {
def apply(name: String, mixins: List[String]): CaseClass = CaseClass(name, Nil, None, mixins)
}
final case class Enum(
name: String,
cases: List[CaseClass],
caseNames: List[String] = Nil,
discriminator: Option[String] = None,
noDiscriminator: Boolean = false,
schema: Boolean = true,
abstractMembers: List[Field] = Nil,
) extends ScalaType
final case class Annotation(value: String, imports: List[Code.Import]) extends Code
sealed abstract case class Field private (name: String, fieldType: ScalaType, annotations: List[Annotation])
extends Code {
// only allow copy on fieldType, since name is mangled to be valid in smart constructor
def copy(fieldType: ScalaType = fieldType, annotations: List[Annotation] = annotations): Field =
new Field(name, fieldType, annotations) {}
}
object Field {
def apply(name: String): Field =
apply(name, ScalaType.Inferred)
def apply(name: String, conf: NormalizeFields): Field =
apply(name, ScalaType.Inferred, conf)
def apply(name: String, fieldType: ScalaType): Field =
apply(name, fieldType, openapi.Config.default.fieldNamesNormalization)
def apply(name: String, fieldType: ScalaType, conf: NormalizeFields): Field =
apply(name, fieldType, Nil, conf)
def apply(name: String, fieldType: ScalaType, annotation: Annotation, conf: NormalizeFields): Field =
apply(name, fieldType, List(annotation), conf)
def apply(name: String, fieldType: ScalaType, annotations: List[Annotation], conf: NormalizeFields): Field = {
def mkValidScalaTermName(term: String) = Term.Name(term).syntax
val (validScalaTermName, originalFieldNameAnnotation) = conf.manualOverrides
.get(name)
.orElse(if (conf.enableAutomatic) normalize(name) else None)
.fold(mkValidScalaTermName(name) -> Option.empty[Annotation]) { maybeValidScala =>
val valid = mkValidScalaTermName(maybeValidScala)
// if modified name is an invalid scala term,
// then no reason to use backticks wrapped non-original name.
// In this case we return the original name,
// after possibly wrapping with backticks.
if (valid != maybeValidScala) mkValidScalaTermName(name) -> Option.empty[Annotation]
else {
val annotationString = "@fieldName(\"" + name + "\")"
val annotationImport = List(Import("zio.schema.annotation.fieldName"))
maybeValidScala -> Some(Annotation(annotationString, annotationImport))
}
}
val allAnnotations = originalFieldNameAnnotation.fold(annotations)(annotations.::)
new Field(validScalaTermName, fieldType, allAnnotations.sortBy(_.value)) {}
}
private val regex = "(?<=[a-z0-9])(?=[A-Z0-9])|(?<=[A-Z0-9])(?=[A-Z0-9][a-z0-9])|[^a-zA-Z0-9]+"
def normalize(name: String): Option[String] = {
name
.split(regex)
.toList match {
case Nil => None
case head :: tail =>
val normalized = (head.toLowerCase :: tail.map(_.capitalize)).mkString
// no need to normalize if the name is already normalized
// returning None here will signal there's no need for annotation.
if (normalized == name) None
else Some(normalized)
}
}
}
sealed trait Collection extends ScalaType {
def elementType: ScalaType
}
object Collection {
final case class Seq(elementType: ScalaType, nonEmpty: Boolean) extends Collection
final case class Set(elementType: ScalaType, nonEmpty: Boolean) extends Collection
final case class Map(elementType: ScalaType, keysType: Option[ScalaType]) extends Collection
final case class Opt(elementType: ScalaType) extends Collection
}
sealed trait Primitive extends ScalaType
object Primitive {
case object ScalaInt extends Primitive
case object ScalaLong extends Primitive
case object ScalaDouble extends Primitive
case object ScalaFloat extends Primitive
case object ScalaChar extends Primitive
case object ScalaByte extends Primitive
case object ScalaShort extends Primitive
case object ScalaBoolean extends Primitive
case object ScalaUnit extends Primitive
case object ScalaUUID extends Primitive
case object ScalaString extends Primitive
}
final case class EndpointCode(
method: Method,
pathPatternCode: PathPatternCode,
queryParamsCode: Set[QueryParamCode],
headersCode: HeadersCode,
inCode: InCode,
outCodes: List[OutCode],
errorsCode: List[OutCode],
) extends Code
final case class PathPatternCode(segments: List[PathSegmentCode])
final case class PathSegmentCode(name: String, segmentType: CodecType)
object PathSegmentCode {
def apply(name: String): PathSegmentCode = PathSegmentCode(name, CodecType.Literal)
}
sealed trait CodecType
object CodecType {
case object Boolean extends CodecType
case object Int extends CodecType
case object Literal extends CodecType
case object Long extends CodecType
case object String extends CodecType
case object UUID extends CodecType
case class Aliased(underlying: CodecType, newtypeName: String) extends CodecType
}
final case class QueryParamCode(name: String, queryType: CodecType)
final case class HeadersCode(headers: List[HeaderCode])
object HeadersCode { val empty: HeadersCode = HeadersCode(Nil) }
final case class HeaderCode(name: String)
final case class InCode(
inType: String,
name: Option[String],
doc: Option[String],
streaming: Boolean,
)
object InCode { def apply(inType: String): InCode = InCode(inType, None, None, streaming = false) }
final case class OutCode(
outType: String,
status: Status,
mediaType: Option[String],
doc: Option[String],
streaming: Boolean,
)
object OutCode {
def apply(outType: String, status: Status): OutCode = OutCode(outType, status, None, None, streaming = false)
def json(outType: String, status: Status): OutCode =
OutCode(outType, status, Some("application/json"), None, streaming = false)
}
}
