laconicd/gql/scalar.go

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package gql
import (
"context"
"encoding/json"
"fmt"
"io"
)
// Represents an IPLD link. Links are generally but not necessarily implemented as CIDs
type Link string
func (l Link) String() string {
return string(l)
}
// UnmarshalGQLContext implements the graphql.ContextUnmarshaler interface
func (l *Link) UnmarshalGQLContext(_ context.Context, v interface{}) error {
s, ok := v.(string)
if !ok {
return fmt.Errorf("Link must be a string")
}
*l = Link(s)
return nil
}
// MarshalGQLContext implements the graphql.ContextMarshaler interface
func (l Link) MarshalGQLContext(_ context.Context, w io.Writer) error {
encodable := map[string]string{
"/": l.String(),
}
return json.NewEncoder(w).Encode(encodable)
}