gotosocial/vendor/github.com/spf13/viper/internal/encoding/encoder.go
tobi 0884f89431
Implement Cobra CLI tooling, Viper config tooling (#336)
* start pulling out + replacing urfave and config

* replace many many instances of config

* move more stuff => viper

* properly remove urfave

* move some flags to root command

* add testrig commands to root

* alias config file keys

* start adding cli parsing tests

* reorder viper init

* remove config path alias

* fmt

* change config file keys to non-nested

* we're more or less in business now

* tidy up the common func

* go fmt

* get tests passing again

* add note about the cliparsing tests

* reorganize

* update docs with changes

* structure cmd dir better

* rename + move some files around

* fix dangling comma
2021-12-07 13:31:39 +01:00

61 lines
1.5 KiB
Go

package encoding
import (
"sync"
)
// Encoder encodes the contents of v into a byte representation.
// It's primarily used for encoding a map[string]interface{} into a file format.
type Encoder interface {
Encode(v interface{}) ([]byte, error)
}
const (
// ErrEncoderNotFound is returned when there is no encoder registered for a format.
ErrEncoderNotFound = encodingError("encoder not found for this format")
// ErrEncoderFormatAlreadyRegistered is returned when an encoder is already registered for a format.
ErrEncoderFormatAlreadyRegistered = encodingError("encoder already registered for this format")
)
// EncoderRegistry can choose an appropriate Encoder based on the provided format.
type EncoderRegistry struct {
encoders map[string]Encoder
mu sync.RWMutex
}
// NewEncoderRegistry returns a new, initialized EncoderRegistry.
func NewEncoderRegistry() *EncoderRegistry {
return &EncoderRegistry{
encoders: make(map[string]Encoder),
}
}
// RegisterEncoder registers an Encoder for a format.
// Registering a Encoder for an already existing format is not supported.
func (e *EncoderRegistry) RegisterEncoder(format string, enc Encoder) error {
e.mu.Lock()
defer e.mu.Unlock()
if _, ok := e.encoders[format]; ok {
return ErrEncoderFormatAlreadyRegistered
}
e.encoders[format] = enc
return nil
}
func (e *EncoderRegistry) Encode(format string, v interface{}) ([]byte, error) {
e.mu.RLock()
encoder, ok := e.encoders[format]
e.mu.RUnlock()
if !ok {
return nil, ErrEncoderNotFound
}
return encoder.Encode(v)
}