forked from keybase/client
/
appstate.go
246 lines (220 loc) · 6.45 KB
/
appstate.go
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package libkb
import (
"fmt"
"sync"
"time"
"github.com/keybase/client/go/protocol/keybase1"
"github.com/keybase/go-framed-msgpack-rpc/rpc"
)
// MobileAppState tracks the state of foreground/background status of the app
// in which the service is running in.
type MobileAppState struct {
Contextified
sync.Mutex
state keybase1.MobileAppState
updateChs []chan keybase1.MobileAppState
// mtime is the time at which the appstate first switched to the current state.
// It is a monotonic timestamp and should only be used relatively.
mtime *time.Time
}
func NewMobileAppState(g *GlobalContext) *MobileAppState {
return &MobileAppState{
Contextified: NewContextified(g),
state: keybase1.MobileAppState_FOREGROUND,
mtime: nil,
}
}
// NextUpdate returns a channel that triggers when the app state changes
func (a *MobileAppState) NextUpdate(lastState *keybase1.MobileAppState) chan keybase1.MobileAppState {
a.Lock()
defer a.Unlock()
ch := make(chan keybase1.MobileAppState, 1)
if lastState != nil && *lastState != a.state {
ch <- a.state
} else {
a.updateChs = append(a.updateChs, ch)
}
return ch
}
func (a *MobileAppState) updateLocked(state keybase1.MobileAppState) {
if a.state != state {
a.G().Log.Debug("MobileAppState.Update: useful update: %v, we are currently in state: %v",
state, a.state)
a.G().PerfLog.Debug("MobileAppState.Update: useful update: %v, we are currently in state: %v",
state, a.state)
a.state = state
t := time.Now()
a.mtime = &t // only update mtime if we're changing state
for _, ch := range a.updateChs {
ch <- state
}
a.updateChs = nil
// cancel RPCs if we go into the background
switch a.state {
case keybase1.MobileAppState_BACKGROUND:
a.G().RPCCanceler.CancelLiveContexts(RPCCancelerReasonBackground)
default:
// Nothing to do for other states.
}
} else {
a.G().Log.Debug("MobileAppState.Update: ignoring update: %v, we are currently in state: %v",
state, a.state)
}
}
func (a *MobileAppState) UpdateWithCheck(state keybase1.MobileAppState,
check func(keybase1.MobileAppState) bool) {
defer a.G().Trace(fmt.Sprintf("MobileAppState.UpdateWithCheck(%v)", state), nil)()
a.Lock()
defer a.Unlock()
if check(a.state) {
a.updateLocked(state)
} else {
a.G().Log.Debug("MobileAppState.UpdateWithCheck: skipping update, failed check")
}
}
// Update updates the current app state, and notifies any waiting calls from NextUpdate
func (a *MobileAppState) Update(state keybase1.MobileAppState) {
defer a.G().Trace(fmt.Sprintf("MobileAppState.Update(%v)", state), nil)()
a.Lock()
defer a.Unlock()
a.updateLocked(state)
}
// State returns the current app state
func (a *MobileAppState) State() keybase1.MobileAppState {
a.Lock()
defer a.Unlock()
return a.state
}
func (a *MobileAppState) StateAndMtime() (keybase1.MobileAppState, *time.Time) {
a.Lock()
defer a.Unlock()
return a.state, a.mtime
}
// --------------------------------------------------
// MobileNetState tracks the state of the network status of the app in which
// the service is running in.
type MobileNetState struct {
Contextified
sync.Mutex
state keybase1.MobileNetworkState
updateChs []chan keybase1.MobileNetworkState
}
func NewMobileNetState(g *GlobalContext) *MobileNetState {
return &MobileNetState{
Contextified: NewContextified(g),
state: keybase1.MobileNetworkState_NOTAVAILABLE,
}
}
// NextUpdate returns a channel that triggers when the network state changes
func (a *MobileNetState) NextUpdate(lastState *keybase1.MobileNetworkState) chan keybase1.MobileNetworkState {
a.Lock()
defer a.Unlock()
ch := make(chan keybase1.MobileNetworkState, 1)
if lastState != nil && *lastState != a.state {
ch <- a.state
} else {
a.updateChs = append(a.updateChs, ch)
}
return ch
}
// Update updates the current network state, and notifies any waiting calls
// from NextUpdate
func (a *MobileNetState) Update(state keybase1.MobileNetworkState) {
defer a.G().Trace(fmt.Sprintf("MobileNetState.Update(%v)", state), nil)()
a.Lock()
defer a.Unlock()
if a.state != state {
a.G().Log.Debug("MobileNetState.Update: useful update: %v, we are currently in state: %v",
state, a.state)
a.state = state
for _, ch := range a.updateChs {
ch <- state
}
a.updateChs = nil
} else {
a.G().Log.Debug("MobileNetState.Update: ignoring update: %v, we are currently in state: %v",
state, a.state)
}
}
// State returns the current network state
func (a *MobileNetState) State() keybase1.MobileNetworkState {
a.Lock()
defer a.Unlock()
return a.state
}
// --------------------------------------------------
type DesktopAppState struct {
Contextified
sync.Mutex
provider rpc.Transporter
suspended bool
locked bool
updateSuspendChs []chan bool
}
func NewDesktopAppState(g *GlobalContext) *DesktopAppState {
d := &DesktopAppState{Contextified: NewContextified(g)}
g.PushShutdownHook(func(mctx MetaContext) error {
d.Lock()
defer d.Unlock()
// reset power state on shutdown
d.resetLocked()
return nil
})
return d
}
func (a *DesktopAppState) NextSuspendUpdate(lastState *bool) chan bool {
a.Lock()
defer a.Unlock()
ch := make(chan bool, 1)
if lastState != nil && *lastState != a.suspended {
ch <- a.suspended
} else {
a.updateSuspendChs = append(a.updateSuspendChs, ch)
}
return ch
}
// event from power monitor
// https://electronjs.org/docs/api/power-monitor
func (a *DesktopAppState) Update(mctx MetaContext, event string, provider rpc.Transporter) {
mctx.Debug("DesktopAppState.Update(%v)", event)
a.Lock()
defer a.Unlock()
a.provider = provider
switch event {
case "suspend":
a.suspended = true
case "resume":
a.suspended = false
case "shutdown":
case "lock-screen":
a.locked = true
case "unlock-screen":
a.suspended = false
a.locked = false
}
for _, ch := range a.updateSuspendChs {
ch <- a.suspended
}
a.updateSuspendChs = nil
}
func (a *DesktopAppState) Disconnected(provider rpc.Transporter) {
a.Lock()
defer a.Unlock()
theProvider := provider == a.provider
a.G().Log.Debug("DesktopAppState.Disconnected(%v)", theProvider)
if theProvider {
a.provider = nil
// The connection to electron has been severed. We won't get any more power
// status updates from it. So act as though the machine is on in the default state.
a.resetLocked()
}
}
func (a *DesktopAppState) AwakeAndUnlocked(mctx MetaContext) bool {
a.Lock()
defer a.Unlock()
return !a.suspended && !a.locked
}
func (a *DesktopAppState) resetLocked() {
a.suspended = false
a.locked = false
}