/
eventTrigger.go
49 lines (40 loc) · 1.37 KB
/
eventTrigger.go
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package analyser
import (
"github.com/helloworldpark/tickle-stock-watcher/structs"
"github.com/sdcoffey/techan"
)
// EventCallback is a type of callback when the trigger is triggered.
type EventCallback func(price structs.StockPrice, orderSide int, userid int64, repeat bool)
// EventTrigger is an interface for triggering events.
type EventTrigger interface {
OrderSide() techan.OrderSide
IsTriggered(index int, record *techan.TradingRecord) bool
SetCallback(callback EventCallback)
OnEvent(price structs.StockPrice, orderSide int, userid int64, repeat bool)
}
type eventTrigger struct {
orderSide techan.OrderSide
rule techan.Rule
callback EventCallback
}
// newEventTrigger will create an EventTrigger for notifiying price changes
func newEventTrigger(orderSide techan.OrderSide, rule techan.Rule, callback EventCallback) EventTrigger {
return &eventTrigger{
orderSide: orderSide,
rule: rule,
callback: callback,
}
}
// Event
func (e *eventTrigger) OrderSide() techan.OrderSide {
return e.orderSide
}
func (e *eventTrigger) IsTriggered(index int, record *techan.TradingRecord) bool {
return e.rule.IsSatisfied(index, record)
}
func (e *eventTrigger) SetCallback(callback EventCallback) {
e.callback = callback
}
func (e *eventTrigger) OnEvent(price structs.StockPrice, orderSide int, userid int64, repeat bool) {
e.callback(price, orderSide, userid, repeat)
}