sangria.schema.package.scala Maven / Gradle / Ivy
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Scala GraphQL implementation
package sangria
import sangria.marshalling.MarshallerCapability
import sangria.validation._
package object schema {
def valueOutput[T](value: T, capabilities: Set[MarshallerCapability]): T = value
implicit val IntType = ScalarType[Int]("Int",
description = Some(
"The `Int` scalar type represents non-fractional signed whole numeric values. " +
"Int can represent values between -(2^31) and 2^31 - 1."),
coerceOutput = valueOutput,
coerceUserInput = {
case i: Int ⇒ Right(i)
case i: Long if i.isValidInt ⇒ Right(i.toInt)
case i: BigInt if !i.isValidInt ⇒ Left(BigIntCoercionViolation)
case i: BigInt ⇒ Right(i.intValue)
case _ ⇒ Left(IntCoercionViolation)
},
coerceInput = {
case ast.IntValue(i, _) ⇒ Right(i)
case ast.BigIntValue(i, _) if !i.isValidInt ⇒ Left(BigIntCoercionViolation)
case ast.BigIntValue(i, _) ⇒ Right(i.intValue)
case _ ⇒ Left(IntCoercionViolation)
})
implicit val LongType = ScalarType[Long]("Long",
description = Some(
"The `Long` scalar type represents non-fractional signed whole numeric values. " +
"Long can represent values between -(2^63) and 2^63 - 1."),
coerceOutput = valueOutput,
coerceUserInput = {
case i: Int ⇒ Right(i: Long)
case i: Long ⇒ Right(i)
case i: BigInt if !i.isValidLong ⇒ Left(BigLongCoercionViolation)
case i: BigInt ⇒ Right(i.longValue)
case _ ⇒ Left(LongCoercionViolation)
},
coerceInput = {
case ast.IntValue(i, _) ⇒ Right(i: Long)
case ast.BigIntValue(i, _) if !i.isValidLong ⇒ Left(BigLongCoercionViolation)
case ast.BigIntValue(i, _) ⇒ Right(i.longValue)
case _ ⇒ Left(LongCoercionViolation)
})
implicit val BigIntType = ScalarType[BigInt]("BigInt",
description = Some(
"The `BigInt` scalar type represents non-fractional signed whole numeric values. " +
"BigInt can represent arbitrary big values."),
coerceOutput = valueOutput,
coerceUserInput = {
case i: Int ⇒ Right(BigInt(i))
case i: Long ⇒ Right(BigInt(i))
case i: BigInt ⇒ Right(i)
case _ ⇒ Left(IntCoercionViolation)
},
coerceInput = {
case ast.IntValue(i, _) ⇒ Right(i)
case ast.BigIntValue(i, _) ⇒ Right(i)
case _ ⇒ Left(IntCoercionViolation)
})
implicit val FloatType = ScalarType[Double]("Float",
description = Some(
"The `Float` scalar type represents signed double-precision fractional " +
"values as specified by [IEEE 754](http://en.wikipedia.org/wiki/IEEE_floating_point)."),
coerceOutput = valueOutput,
coerceUserInput = {
case i: Int ⇒ Right(i.toDouble)
case i: Long ⇒ Right(i.toDouble)
case i: BigInt if !i.isValidDouble ⇒ Left(BigDecimalCoercionViolation)
case i: BigInt ⇒ Right(i.doubleValue())
case d: Double ⇒ Right(d)
case d: BigDecimal if !d.isDecimalDouble ⇒ Left(BigDecimalCoercionViolation)
case d: BigDecimal ⇒ Right(d.doubleValue())
case _ ⇒ Left(FloatCoercionViolation)
},
coerceInput = {
case ast.FloatValue(d, _) ⇒ Right(d)
case ast.BigDecimalValue(d, _) if !d.isDecimalDouble ⇒ Left(BigDecimalCoercionViolation)
case ast.BigDecimalValue(d, _) ⇒ Right(d.doubleValue)
case ast.IntValue(i, _) ⇒ Right(i)
case ast.BigIntValue(i, _) if !i.isValidDouble ⇒ Left(BigDecimalCoercionViolation)
case ast.BigIntValue(i, _) ⇒ Right(i.doubleValue)
case _ ⇒ Left(FloatCoercionViolation)
})
implicit val BigDecimalType = ScalarType[BigDecimal]("BigDecimal",
description = Some("The `BigDecimal` scalar type represents signed fractional values with arbitrary precision."),
coerceOutput = valueOutput,
coerceUserInput = {
case i: Int ⇒ Right(BigDecimal(i))
case i: Long ⇒ Right(BigDecimal(i))
case i: BigInt ⇒ Right(BigDecimal(i))
case d: Double ⇒ Right(BigDecimal(d))
case d: BigDecimal ⇒ Right(d)
case _ ⇒ Left(FloatCoercionViolation)
},
coerceInput = {
case ast.BigDecimalValue(d, _) ⇒ Right(d)
case ast.FloatValue(d, _) ⇒ Right(BigDecimal(d))
case ast.IntValue(i, _) ⇒ Right(BigDecimal(i))
case ast.BigIntValue(i, _) ⇒ Right(BigDecimal(i))
case _ ⇒ Left(FloatCoercionViolation)
})
implicit val BooleanType = ScalarType[Boolean]("Boolean",
description = Some("The `Boolean` scalar type represents `true` or `false`."),
coerceOutput = valueOutput,
coerceUserInput = {
case b: Boolean ⇒ Right(b)
case _ ⇒ Left(BooleanCoercionViolation)
},
coerceInput = {
case ast.BooleanValue(b, _) ⇒ Right(b)
case _ ⇒ Left(BooleanCoercionViolation)
})
implicit val StringType = ScalarType[String]("String",
description = Some(
"The `String` scalar type represents textual data, represented as UTF-8 " +
"character sequences. The String type is most often used by GraphQL to " +
"represent free-form human-readable text."),
coerceOutput = valueOutput,
coerceUserInput = {
case s: String ⇒ Right(s)
case _ ⇒ Left(StringCoercionViolation)
},
coerceInput = {
case ast.StringValue(s, _) ⇒ Right(s)
case _ ⇒ Left(StringCoercionViolation)
})
val IDType = ScalarType[String]("ID",
description = Some(
"The `ID` scalar type represents a unique identifier, often used to " +
"refetch an object or as key for a cache. The ID type appears in a JSON " +
"response as a String; however, it is not intended to be human-readable. " +
"When expected as an input type, any string (such as `\"4\"`) or integer " +
"(such as `4`) input value will be accepted as an ID."),
coerceOutput = valueOutput,
coerceUserInput = {
case s: String ⇒ Right(s)
case i: Int ⇒ Right(i.toString)
case i: Long ⇒ Right(i.toString)
case i: BigInt ⇒ Right(i.toString)
case _ ⇒ Left(IDCoercionViolation)
},
coerceInput = {
case ast.StringValue(id, _) ⇒ Right(id)
case ast.IntValue(id, _) ⇒ Right(id.toString)
case ast.BigIntValue(id, _) ⇒ Right(id.toString)
case _ ⇒ Left(IDCoercionViolation)
})
val BuiltinScalars: List[ScalarType[_]] =
IntType :: LongType :: BigIntType :: FloatType :: BigDecimalType :: BooleanType :: StringType :: IDType :: Nil
val BuiltinScalarsByName: Map[String, ScalarType[_]] =
BuiltinScalars.groupBy(_.name).mapValues(_.head)
val IfArg = Argument("if", BooleanType, "Included when true.")
val IncludeDirective = Directive("include",
description = Some("Directs the executor to include this field or fragment only when the `if` argument is true."),
arguments = IfArg :: Nil,
locations = Set(DirectiveLocation.Field, DirectiveLocation.FragmentSpread, DirectiveLocation.InlineFragment),
shouldInclude = ctx ⇒ ctx.arg(IfArg))
val SkipDirective = Directive("skip",
description = Some("Directs the executor to skip this field or fragment when the `if` argument is true."),
arguments = IfArg :: Nil,
locations = Set(DirectiveLocation.Field, DirectiveLocation.FragmentSpread, DirectiveLocation.InlineFragment),
shouldInclude = ctx ⇒ !ctx.arg(IfArg))
val BuiltinDirectives = IncludeDirective :: SkipDirective :: Nil
def fields[Ctx, Val](fields: Field[Ctx, Val]*): List[Field[Ctx, Val]] = fields.toList
def interfaces[Ctx, Concrete](interfaces: PossibleInterface[Ctx, Concrete]*): List[PossibleInterface[Ctx, Concrete]] =
interfaces.toList
def possibleTypes[Ctx, Abstract](objectTypes: PossibleObject[Ctx, Abstract]*): List[PossibleObject[Ctx, Abstract]] =
objectTypes.toList
}
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