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peersRatingMonitor.go
92 lines (74 loc) · 2.5 KB
/
peersRatingMonitor.go
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package rating
import (
"encoding/json"
"fmt"
"github.com/bhagyaraj1208117/andes-abc-1/core"
"github.com/bhagyaraj1208117/andes-abc-1/core/check"
"github.com/bhagyaraj1208117/andes-communication-go/p2p"
"github.com/bhagyaraj1208117/andes-storage-go/types"
)
const unknownRating = "unknown"
// ArgPeersRatingMonitor is the DTO used to create a new peers rating monitor
type ArgPeersRatingMonitor struct {
TopRatedCache types.Cacher
BadRatedCache types.Cacher
}
type peersRatingMonitor struct {
topRatedCache types.Cacher
badRatedCache types.Cacher
}
// NewPeersRatingMonitor returns a new peers rating monitor
func NewPeersRatingMonitor(args ArgPeersRatingMonitor) (*peersRatingMonitor, error) {
err := checkMonitorArgs(args)
if err != nil {
return nil, err
}
return &peersRatingMonitor{
topRatedCache: args.TopRatedCache,
badRatedCache: args.BadRatedCache,
}, nil
}
func checkMonitorArgs(args ArgPeersRatingMonitor) error {
if check.IfNil(args.TopRatedCache) {
return fmt.Errorf("%w for TopRatedCache", p2p.ErrNilCacher)
}
if check.IfNil(args.BadRatedCache) {
return fmt.Errorf("%w for BadRatedCache", p2p.ErrNilCacher)
}
return nil
}
// GetConnectedPeersRatings returns the ratings of the current connected peers
func (monitor *peersRatingMonitor) GetConnectedPeersRatings(connectionsHandler p2p.ConnectionsHandler) (string, error) {
if check.IfNil(connectionsHandler) {
return "", p2p.ErrNilConnectionsHandler
}
connectedPeersRatings := monitor.extractConnectedPeersRatings(connectionsHandler)
jsonMap, err := json.Marshal(&connectedPeersRatings)
if err != nil {
return "", err
}
return string(jsonMap), nil
}
func (monitor *peersRatingMonitor) extractConnectedPeersRatings(connectionsHandler p2p.ConnectionsHandler) map[string]string {
connectedPeers := connectionsHandler.ConnectedPeers()
connectedPeersRatings := make(map[string]string, len(connectedPeers))
for _, connectedPeer := range connectedPeers {
connectedPeersRatings[connectedPeer.Pretty()] = monitor.fetchRating(connectedPeer)
}
return connectedPeersRatings
}
func (monitor *peersRatingMonitor) fetchRating(pid core.PeerID) string {
rating, found := monitor.topRatedCache.Get(pid.Bytes())
if found {
return fmt.Sprintf("%d", rating)
}
rating, found = monitor.badRatedCache.Get(pid.Bytes())
if found {
return fmt.Sprintf("%d", rating)
}
return unknownRating
}
// IsInterfaceNil returns true if there is no value under the interface
func (monitor *peersRatingMonitor) IsInterfaceNil() bool {
return monitor == nil
}