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package caveats
import (
"fmt"
"strings"
"github.com/authzed/spicedb/pkg/caveats/types"
core "github.com/authzed/spicedb/pkg/proto/core/v1"
)
// UnknownParameterOption is the option to ConvertContextToParameters around handling
// of unknown parameters.
type UnknownParameterOption int
const (
// SkipUnknownParameters indicates that unknown parameters should be skipped in conversion.
SkipUnknownParameters UnknownParameterOption = 0
// ErrorForUnknownParameters indicates that unknown parameters should return an error.
ErrorForUnknownParameters UnknownParameterOption = 1
)
// ConvertContextToParameters converts the given context into parameters of the types specified.
// Returns a type error if type conversion failed.
func ConvertContextToParameters(
ts *types.TypeSet,
contextMap map[string]any,
parameterTypes map[string]*core.CaveatTypeReference,
unknownParametersOption UnknownParameterOption,
) (map[string]any, error) {
if len(contextMap) == 0 {
return nil, nil
}
if len(parameterTypes) == 0 {
return nil, fmt.Errorf("missing parameters for caveat")
}
converted := make(map[string]any, len(contextMap))
for key, value := range contextMap {
paramType, ok := parameterTypes[key]
if !ok {
if unknownParametersOption == ErrorForUnknownParameters {
return nil, fmt.Errorf("unknown parameter `%s`", key)
}
continue
}
varType, err := types.DecodeParameterType(ts, paramType)
if err != nil {
return nil, err
}
convertedParam, err := varType.ConvertValue(value)
if err != nil {
return nil, ParameterConversionError{fmt.Errorf("could not convert context parameter `%s`: %w", key, err), key}
}
converted[key] = convertedParam
}
return converted, nil
}
// ParameterTypeString returns the string form of the type reference.
func ParameterTypeString(typeRef *core.CaveatTypeReference) string {
var sb strings.Builder
sb.WriteString(typeRef.TypeName)
if len(typeRef.ChildTypes) > 0 {
sb.WriteString("<")
for idx, childType := range typeRef.ChildTypes {
if idx > 0 {
sb.WriteString(", ")
}
sb.WriteString(ParameterTypeString(childType))
}
sb.WriteString(">")
}
return sb.String()
}
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