77 lines
1.5 KiB
Go
77 lines
1.5 KiB
Go
package connection
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import (
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"fmt"
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)
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// State represents device connection state and type,
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// as reported by mobile framework.
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//
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// Zero value represents default assumption about network (online and unknown type).
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type State struct {
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Offline bool `json:"offline"`
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Type Type `json:"type"`
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Expensive bool `json:"expensive"`
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}
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// Type represents description of available
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// connection types as reported by React Native (see
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// https://facebook.github.io/react-native/docs/netinfo.html)
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// We're interested mainly in 'wifi' and 'cellular', but
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// other types are also may be used.
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type Type byte
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const (
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Offline = "offline"
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Wifi = "wifi"
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Cellular = "cellular"
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Unknown = "unknown"
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None = "none"
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)
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// NewType creates new Type from string.
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func NewType(s string) Type {
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switch s {
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case Cellular:
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return connectionCellular
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case Wifi:
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return connectionWifi
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}
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return connectionUnknown
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}
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// Type constants
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const (
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connectionUnknown Type = iota
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connectionCellular // cellular, LTE, 4G, 3G, EDGE, etc.
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connectionWifi // WIFI or iOS simulator
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)
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func (c State) IsExpensive() bool {
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return c.Expensive || c.Type == connectionCellular
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}
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// string formats ConnectionState for logs. Implements Stringer.
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func (c State) String() string {
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if c.Offline {
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return Offline
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}
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var typ string
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switch c.Type {
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case connectionWifi:
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typ = Wifi
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case connectionCellular:
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typ = Cellular
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default:
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typ = Unknown
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}
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if c.Expensive {
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return fmt.Sprintf("%s (expensive)", typ)
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}
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return typ
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}
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