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package main
import (
"fmt"
)
// State represents a type-safe enum in Go which corresponds to the State enum in the GraphQL schema.
type State int
const (
Backlog State = iota // default value
TODO
InProg
Done
)
// the items in this array must have the exact same order as the corresponding constants above
var states = [...]string{"BACKLOG", "TODO", "INPROG", "DONE"}
func (s State) String() string { return states[s] }
func (s *State) Deserialize(str string) {
var found bool
for i, st := range states {
if st == str {
found = true
(*s) = State(i)
}
}
if !found {
panic("invalid value for enum State: " + str)
}
}
// ImplementsGraphQLType instructs the GraphQL server that the State enum can be represented by the State type in Golang.
// If this method is missing we would get a runtime error that the State type can't be assigned a string. However, since
// this type implements the State enum, the server will try to call its [State.UnmarshalGraphQL] method to set a value.
func (State) ImplementsGraphQLType(name string) bool {
return name == "State"
}
// UnmarshalGraphQL tries to unmarshal a type from a given GraphQL value.
func (s *State) UnmarshalGraphQL(input interface{}) error {
var err error
switch input := input.(type) {
case string:
s.Deserialize(input)
default:
err = fmt.Errorf("wrong type for State: %T", input)
}
return err
}
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