/
feed.go
61 lines (51 loc) · 1.29 KB
/
feed.go
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package order
import (
"github.com/rodrigo-brito/ninjabot/model"
)
type DataFeed struct {
Data chan model.Order
Err chan error
}
type FeedConsumer func(order model.Order)
type Feed struct {
OrderFeeds map[string]*DataFeed
SubscriptionsBySymbol map[string][]Subscription
}
type Subscription struct {
onlyNewOrder bool
consumer FeedConsumer
}
func NewOrderFeed() *Feed {
return &Feed{
OrderFeeds: make(map[string]*DataFeed),
SubscriptionsBySymbol: make(map[string][]Subscription),
}
}
func (d *Feed) Subscribe(pair string, consumer FeedConsumer, onlyNewOrder bool) {
if _, ok := d.OrderFeeds[pair]; !ok {
d.OrderFeeds[pair] = &DataFeed{
Data: make(chan model.Order),
Err: make(chan error),
}
}
d.SubscriptionsBySymbol[pair] = append(d.SubscriptionsBySymbol[pair], Subscription{
onlyNewOrder: onlyNewOrder,
consumer: consumer,
})
}
func (d *Feed) Publish(order model.Order, _ bool) {
if _, ok := d.OrderFeeds[order.Pair]; ok {
d.OrderFeeds[order.Pair].Data <- order
}
}
func (d *Feed) Start() {
for pair := range d.OrderFeeds {
go func(pair string, feed *DataFeed) {
for order := range feed.Data {
for _, subscription := range d.SubscriptionsBySymbol[pair] {
subscription.consumer(order)
}
}
}(pair, d.OrderFeeds[pair])
}
}