client

type Emoji struct {
	EmojiPair
	Created  time.Time     `firestore:"created"`
	Uses     int           `firestore:"uses"`               // total use count
	Last     time.Time     `firestore:"last,omitempty"`     // last use at
	Recent   float64       `firestore:"recent"`             // recent use count
	RecentAt time.Time     `firestore:"recentAt,omitempty"` // recent use adjusted at
	Duration time.Duration `firestore:"duration"`           // drifted time between use
	Source   string        `firestore:"source,omitempty"`   // original import source
	Length   int           `firestore:"len,omitempty"`      // emoji visible length
	Version  int           `firestore:"v,omitempty"`        // revision in db

	Index map[string]float64 `firestore:"i,omitempty"` // all index components by prefix
}

type EmojiClient struct {
	Context context.Context
	Client  *firestore.Client
	Count   func(string) int
}

type EmojiPair struct {
	Name  string `firestore:"name" json:"name"`
	Emoji string `firestore:"emoji" json:"emoji"`
}