func parseValueLiteral(parser *Parser, isConst bool) (ast.Value, error) {
token := parser.Token
switch token.Kind {
case lexer.TokenKind[lexer.BRACKET_L]:
return parseList(parser, isConst)
case lexer.TokenKind[lexer.BRACE_L]:
return parseObject(parser, isConst)
case lexer.TokenKind[lexer.INT]:
advance(parser)
return ast.NewIntValue(&ast.IntValue{
Value: token.Value,
Loc: loc(parser, token.Start),
}), nil
case lexer.TokenKind[lexer.FLOAT]:
advance(parser)
return ast.NewFloatValue(&ast.FloatValue{
Value: token.Value,
Loc: loc(parser, token.Start),
}), nil
case lexer.TokenKind[lexer.STRING]:
advance(parser)
return ast.NewStringValue(&ast.StringValue{
Value: token.Value,
Loc: loc(parser, token.Start),
}), nil
case lexer.TokenKind[lexer.NAME]:
if token.Value == "true" || token.Value == "false" {
advance(parser)
value := true
if token.Value == "false" {
value = false
}
return ast.NewBooleanValue(&ast.BooleanValue{
Value: value,
Loc: loc(parser, token.Start),
}), nil
} else if token.Value != "null" {
advance(parser)
return ast.NewEnumValue(&ast.EnumValue{
Value: token.Value,
Loc: loc(parser, token.Start),
}), nil
}
case lexer.TokenKind[lexer.DOLLAR]:
if !isConst {
return parseVariable(parser)
}
}
if err := unexpected(parser, lexer.Token{}); err != nil {
return nil, err
}
return nil, nil
}
/**
* Produces a GraphQL Value AST given a Golang value.
*
* Optionally, a GraphQL type may be provided, which will be used to
* disambiguate between value primitives.
*
* | JSON Value | GraphQL Value |
* | ------------- | -------------------- |
* | Object | Input Object |
* | Array | List |
* | Boolean | Boolean |
* | String | String / Enum Value |
* | Number | Int / Float |
*
*/
func astFromValue(value interface{}, ttype Type) ast.Value {
if ttype, ok := ttype.(*NonNull); ok {
// Note: we're not checking that the result is non-null.
// This function is not responsible for validating the input value.
val := astFromValue(value, ttype.OfType)
return val
}
if isNullish(value) {
return nil
}
valueVal := reflect.ValueOf(value)
if !valueVal.IsValid() {
return nil
}
if valueVal.Type().Kind() == reflect.Ptr {
valueVal = valueVal.Elem()
}
if !valueVal.IsValid() {
return nil
}
// Convert Golang slice to GraphQL list. If the Type is a list, but
// the value is not an array, convert the value using the list's item type.
if ttype, ok := ttype.(*List); ok {
if valueVal.Type().Kind() == reflect.Slice {
itemType := ttype.OfType
values := []ast.Value{}
for i := 0; i < valueVal.Len(); i++ {
item := valueVal.Index(i).Interface()
itemAST := astFromValue(item, itemType)
if itemAST != nil {
values = append(values, itemAST)
}
}
return ast.NewListValue(&ast.ListValue{
Values: values,
})
} else {
// Because GraphQL will accept single values as a "list of one" when
// expecting a list, if there's a non-array value and an expected list type,
// create an AST using the list's item type.
val := astFromValue(value, ttype.OfType)
return val
}
}
if valueVal.Type().Kind() == reflect.Map {
// TODO: implement astFromValue from Map to Value
}
if value, ok := value.(bool); ok {
return ast.NewBooleanValue(&ast.BooleanValue{
Value: value,
})
}
if value, ok := value.(int); ok {
if ttype == Float {
return ast.NewIntValue(&ast.IntValue{
Value: fmt.Sprintf("%v.0", value),
})
}
return ast.NewIntValue(&ast.IntValue{
Value: fmt.Sprintf("%v", value),
})
}
if value, ok := value.(float32); ok {
return ast.NewFloatValue(&ast.FloatValue{
Value: fmt.Sprintf("%v", value),
})
}
if value, ok := value.(float64); ok {
return ast.NewFloatValue(&ast.FloatValue{
Value: fmt.Sprintf("%v", value),
})
}
if value, ok := value.(string); ok {
if _, ok := ttype.(*Enum); ok {
return ast.NewEnumValue(&ast.EnumValue{
Value: fmt.Sprintf("%v", value),
})
}
return ast.NewStringValue(&ast.StringValue{
Value: fmt.Sprintf("%v", value),
})
}
// fallback, treat as string
return ast.NewStringValue(&ast.StringValue{
Value: fmt.Sprintf("%v", value),
})
}