84 lines
1.8 KiB
Go
84 lines
1.8 KiB
Go
package redis
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import (
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"errors"
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"github.com/redis/go-redis/v9"
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"code.icb4dc0.de/prskr/nurse/grammar"
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"code.icb4dc0.de/prskr/nurse/validation"
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)
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var (
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_ CmdValidator = (*GenericCmdValidator)(nil)
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registry = validation.NewRegistry[redis.Cmder]()
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)
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func init() {
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registry.Register("equals", func() validation.FromCall[redis.Cmder] {
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return new(GenericCmdValidator)
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})
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}
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type CmdValidator interface {
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Validate(cmder redis.Cmder) error
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}
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func GenericCommandValidatorFor[T validation.Value](want T) (*GenericCmdValidator, error) {
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comparator, err := validation.JSONValueComparatorFor(want)
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if err != nil {
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return nil, err
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}
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return &GenericCmdValidator{
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comparator: comparator,
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}, nil
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}
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type GenericCmdValidator struct {
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comparator validation.ValueComparator
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}
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func (g *GenericCmdValidator) UnmarshalCall(c grammar.Call) error {
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if err := grammar.ValidateParameterCount(c.Params, 1); err != nil {
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return err
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}
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var err error
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switch c.Params[0].Type() {
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case grammar.ParamTypeInt:
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if g.comparator, err = validation.JSONValueComparatorFor(*c.Params[0].Int); err != nil {
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return err
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}
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case grammar.ParamTypeFloat:
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if g.comparator, err = validation.JSONValueComparatorFor(*c.Params[0].Float); err != nil {
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return err
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}
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case grammar.ParamTypeString:
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if g.comparator, err = validation.JSONValueComparatorFor(*c.Params[0].String); err != nil {
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return err
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}
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case grammar.ParamTypeUnknown:
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fallthrough
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default:
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return errors.New("param type is unknown")
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}
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return nil
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}
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func (g *GenericCmdValidator) Validate(cmder redis.Cmder) error {
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if err := cmder.Err(); err != nil {
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return err
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}
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if in, ok := cmder.(*redis.StringCmd); ok {
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res, err := in.Result()
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if err != nil {
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return err
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}
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return g.comparator.Equals(res)
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}
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return nil
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}
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