package entity

import "fmt"

// Message is a persisted IM body. Content is serialized JSON bytes, not a string.
type Message struct {
	ID             int64
	ConversationID int64
	SenderID       int64
	ClientMsgID    string
	Type           Type
	Content        []byte
	Status         int
	CreatedAtMS    int64
}

func (m *Message) Payload() (*Content, error) {
	if m == nil {
		return nil, nil
	}
	c, err := UnmarshalContent(m.Content)
	if err != nil {
		return nil, err
	}
	if c.Type != m.Type {
		return nil, fmt.Errorf("content: column type %d != payload %d", m.Type, c.Type)
	}
	return c, nil
}