status-go/geth/api/connection.go

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package api
import (
"fmt"
)
// ConnectionState represents device connection state and type,
// as reported by mobile framework.
//
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// Zero value represents default assumption about network (online and unknown type).
type ConnectionState struct {
Offline bool `json:"offline"`
Type ConnectionType `json:"type"`
Expensive bool `json:"expensive"`
}
// ConnectionType represents description of available
// connection types as reported by React Native (see
// https://facebook.github.io/react-native/docs/netinfo.html)
// We're interested mainly in 'wifi' and 'cellular', but
// other types are also may be used.
type ConnectionType byte
// NewConnectionType creates new ConnectionType from string.
func NewConnectionType(s string) ConnectionType {
switch s {
case "cellular":
return ConnectionCellular
case "wifi":
return ConnectionWifi
}
return ConnectionUnknown
}
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// ConnectionType constants
const (
ConnectionUnknown ConnectionType = iota
ConnectionCellular // cellular, LTE, 4G, 3G, EDGE, etc.
ConnectionWifi // WIFI or iOS simulator
)
// String formats ConnectionState for logs. Implements Stringer.
func (c ConnectionState) String() string {
if c.Offline {
return "offline"
}
var typ string
switch c.Type {
case ConnectionWifi:
typ = "wifi"
case ConnectionCellular:
typ = "cellular"
default:
typ = "unknown"
}
if c.Expensive {
return fmt.Sprintf("%s (expensive)", typ)
}
return typ
}