filter

type Chain struct {
	Filter Filter
	Next   *Chain
}

type Exp struct {
	Begin string `json:"begin"`
	End   string `json:"end"`
}

type Filter interface {
	Allow(phone string, template t.Name) bool
	WhichType() Type
	Apply(strategies []Strategy)
	Resolve(expression string) (interface{}, error)
}

type PostponeFilter struct {
	Type       Type                        `bson:"type" json:"type"`
	Strategies map[t.Name]PostponeStrategy `bson:"strategies" json:"strategies"`
}

type PostponeStrategy struct {
	Begin time.Time
	End   time.Time
}

type RateLimitFilter struct {
	Type       Type                         `bson:"type" json:"type"`
	Strategies map[t.Name]RateLimitStrategy `bson:"strategies" json:"strategies"`
}

type RateLimitStrategy struct {
	Duration time.Duration `json:"duration"`
	Count    uint32        `json:"count"`
}

type Strategy struct {
	Type       Type   `bson:"type" json:"type"`
	Template   t.Name `bson:"template" json:"template"`
	Expression string `bson:"expression" json:"expression"`
	Enabled    bool   `bson:"enabled" json:"enabled"`
}

type Type int

type UnsubscribeFilter struct {
	Type Type `bson:"type" json:"type"`
}