KiviGo — Encoders

Pluggable encoders for KiviGo. This small Go module provides a simple Encoder interface and ready-to-use implementations (JSON, YAML) so values can be serialized/deserialized consistently across KiviGo backends.

Features

• Small and dependency-light encoder interface
• Built-in implementations:
  • JSON encoder
  • YAML encoder
• Easy to implement custom encoders (e.g. MsgPack, Gob, etc)
• Unit tested and CI-friendly

Installation

go get github.com/kivigo/encoders/<encoder_name>

Encoder interface

Implementations must satisfy a small interface used by the KiviGo client:

package model

import "context"

// Encoder defines how values are serialized and deserialized when stored or retrieved from a backend in KiviGo.
//
// KiviGo uses encoders to convert Go values (structs, strings, etc.) into a byte slice for storage,
// and to decode byte slices back into Go values when reading from the backend.
// This allows you to use different formats (JSON, YAML, etc.) or implement your own encoding logic.
//
// Example: using the JSON encoder, a struct will be marshaled to JSON before being saved in the database.
type Encoder interface {
    // Encode serializes the given value into a byte slice.
    //
    // Example:
    //   data, err := encoder.Encode("hello world")
    //   if err != nil {
    //       log.Fatal(err)
    //   }
    //   fmt.Println("Encoded:", data)
    Encode(ctx context.Context, v any) ([]byte, error)

    // Decode deserializes the given byte slice into the provided destination.
    //
    // Example:
    //   var s string
    //   err := encoder.Decode([]byte(`"hello world"`), &s)
    //   if err != nil {
    //       log.Fatal(err)
    //   }
    //   fmt.Println("Decoded:", s)
    Decode(ctx context.Context, data []byte, v any) error
}

Usage with KiviGo

Use an encoder when creating the KiviGo client (example with JSON):

import (
    "context"
    "github.com/kivigo/kivigo"
    "github.com/kivigo/encoders/json"
    "github.com/kivigo/kivigo/backend/local"
)

func example() error {
    bk, err := local.New(local.DefaultOptions("/tmp/data"))
    if err != nil { return err }

    c, err := kivigo.New(bk, kivigo.Option{Encoder: json.New()})
    if err != nil { return err }
    defer c.Close()

    if err := c.Set(context.Background(), "key", map[string]string{"foo":"bar"}); err != nil {
        return err
    }
    return nil
}

Included encoders

• encoders/json — JSON encoder using encoding/json (Dependency-free, default)
• encoders/yaml — YAML encoder using github.com/goccy/go-yaml
• encoders/encrypt — Wrapper to encrypt/decrypt data using any other encoder (e.g. JSON + encryption)

Writing a custom encoder

Create a type that implements Encoder and pass it to the client via kivigo.Option{Encoder: myEncoder}. Keep operations context-aware and error-returning.

Tests

Run unit tests:

go test ./...

Contributing

• Follow the project coding & testing guidelines
• Add unit tests for new encoders
• Document encoder-specific quirks in a short README or the project docs

License

MIT — see the root repository LICENSE file.