public object CoerceValue(ISchema schema, GraphType type, object input, Variables variables = null)
{
if (type is NonNullGraphType)
{
var nonNull = type as NonNullGraphType;
return(CoerceValue(schema, schema.FindType(nonNull.Type), input, variables));
}
if (input == null)
{
return(null);
}
var variable = input as Variable;
if (variable != null)
{
return(variables != null
? variables.ValueFor(variable.Name)
: null);
}
if (type is ListGraphType)
{
var listType = type as ListGraphType;
var listItemType = schema.FindType(listType.Type);
var list = input as IEnumerable;
return(list != null && !(input is string)
? list.Map(item => CoerceValue(schema, listItemType, item, variables)).ToArray()
: new[] { CoerceValue(schema, listItemType, input, variables) });
}
if (type is ObjectGraphType || type is InputObjectGraphType)
{
var obj = new Dictionary <string, object>();
if (input is KeyValuePair <string, object> )
{
var kvp = (KeyValuePair <string, object>)input;
input = new Dictionary <string, object> {
{ kvp.Key, kvp.Value }
};
}
var kvps = input as IEnumerable <KeyValuePair <string, object> >;
if (kvps != null)
{
input = kvps.ToDictionary(kvp => kvp.Key, kvp => kvp.Value);
}
var dict = input as Dictionary <string, object>;
if (dict == null)
{
return(null);
}
type.Fields.Apply(field =>
{
object inputValue;
if (dict.TryGetValue(field.Name, out inputValue))
{
var fieldValue = CoerceValue(schema, schema.FindType(field.Type), inputValue, variables);
obj[field.Name] = fieldValue ?? field.DefaultValue;
}
});
return(obj);
}
if (type is ScalarGraphType)
{
var scalarType = type as ScalarGraphType;
return(scalarType.Coerce(input));
}
return(input);
}
public object CoerceValue(ISchema schema, GraphType type, IValue input, Variables variables = null)
{
if (type is NonNullGraphType)
{
var nonNull = type as NonNullGraphType;
return(CoerceValue(schema, schema.FindType(nonNull.Type), input, variables));
}
if (input == null)
{
return(null);
}
var variable = input as VariableReference;
if (variable != null)
{
return(variables != null
? variables.ValueFor(variable.Name)
: null);
}
if (type is ListGraphType)
{
var listType = type as ListGraphType;
var listItemType = schema.FindType(listType.Type);
var list = input as ListValue;
return(list != null
? list.Values.Map(item => CoerceValue(schema, listItemType, item, variables)).ToArray()
: new[] { CoerceValue(schema, listItemType, input, variables) });
}
if (type is ObjectGraphType || type is InputObjectGraphType)
{
var obj = new Dictionary <string, object>();
var objectValue = input as ObjectValue;
if (objectValue == null)
{
return(null);
}
type.Fields.Apply(field =>
{
var objectField = objectValue.Field(field.Name);
if (objectField != null)
{
var fieldValue = CoerceValue(schema, schema.FindType(field.Type), objectField.Value, variables);
fieldValue = fieldValue ?? field.DefaultValue;
obj[field.Name] = fieldValue;
}
});
return(obj);
}
if (type is ScalarGraphType)
{
var scalarType = type as ScalarGraphType;
return(scalarType.ParseLiteral(input));
}
return(null);
}
public Dictionary <string, object> GetArgumentValues(ISchema schema, QueryArguments definitionArguments, Arguments astArguments, Variables variables)
{
if (definitionArguments == null || !definitionArguments.Any())
{
return(null);
}
return(definitionArguments.Aggregate(new Dictionary <string, object>(), (acc, arg) =>
{
var value = astArguments != null ? astArguments.ValueFor(arg.Name) : null;
var type = schema.FindType(arg.Type);
var coercedValue = CoerceValue(schema, type, value, variables);
acc[arg.Name] = IsValidValue(schema, type, coercedValue)
? coercedValue ?? arg.DefaultValue
: arg.DefaultValue;
return acc;
}));
}
public Dictionary <string, object> GetArgumentValues(ISchema schema, QueryArguments definitionArguments, Arguments astArguments, Variables variables)
{
if (definitionArguments == null || !definitionArguments.Any())
{
return(null);
}
return(definitionArguments.Aggregate(new Dictionary <string, object>(StringComparer.OrdinalIgnoreCase), (acc, arg) =>
{
var value = astArguments?.ValueFor(arg.Name);
var type = arg.ResolvedType;
var coercedValue = CoerceValue(schema, type, value, variables);
coercedValue = coercedValue ?? arg.DefaultValue;
acc[arg.Name] = coercedValue;
return acc;
}));
}