// Package models provides the models for the KermaGo application
package models

import (
	"github.com/docker/go/canonical/json"
)

/*
A Chaintip is an object that has a type "chaintip" and a block ID
*/
type Chaintip struct {
	Type    string `json:"type" binding:"required"`
	BlockID string `json:"blockid" binding:"required"`
}

/*
Construct creates a new Chaintip object for this instance
*/
func (c *Chaintip) Construct(bid string) {
	c.Type = "chaintip"
	c.BlockID = bid
}

/*
MarshalJson returns the canonical json of the chaintip object
*/
func (c *Chaintip) MarshalJson() ([]byte, error) {
	return json.MarshalCanonical(c)
}

/*
UnmarshalJSON returns a new Chaintip object from a byte array
*/
func (c *Chaintip) UnmarshalJSON(data []byte) error {
	if len(data) == 0 {
		return nil
	}

	type tmp Chaintip
	err := json.Unmarshal(data, (*tmp)(c))
	if err != nil {
		return err
	}

	return nil
}