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cloudbox/sync/state.go
Knut Ahlers c658048ad1
Fix linter advices
Signed-off-by: Knut Ahlers <knut@ahlers.me>
2019-06-16 23:10:54 +02:00

114 lines
2.2 KiB
Go

package sync
import (
"sort"
"strings"
"sync"
"github.com/Luzifer/cloudbox/providers"
)
const (
sideLocal string = "local"
sideRemote string = "remote"
sourceDB string = "db"
sourceScan string = "scan"
)
type stateDetail struct {
LocalDB,
LocalScan,
RemoteDB,
RemoteScan *providers.FileInfo
}
type state struct {
files map[string]*stateDetail
lock sync.Mutex
}
func newState() *state {
return &state{
files: make(map[string]*stateDetail),
}
}
func (s *state) GetChangeFor(relativeName string) (result Change) {
s.lock.Lock()
defer s.lock.Unlock()
d := s.files[relativeName]
// No changes detected
if d.LocalDB.Equal(d.LocalScan) && d.RemoteDB.Equal(d.RemoteScan) {
// Check special case: Something went really wrong and sync state is FUBAR
if d.LocalDB == nil && d.RemoteDB != nil {
result.Register(ChangeRemoteAdd)
}
if d.LocalDB != nil && d.RemoteDB == nil {
result.Register(ChangeLocalAdd)
}
return result
}
// Check for local changes
switch {
case d.LocalDB == nil && d.LocalScan != nil:
result.Register(ChangeLocalAdd)
case d.LocalDB != nil && d.LocalScan == nil:
result.Register(ChangeLocalDelete)
case !d.LocalDB.Equal(d.LocalScan):
result.Register(ChangeLocalUpdate)
}
// Check for remote changes
switch {
case d.RemoteDB == nil && d.RemoteScan != nil:
result.Register(ChangeRemoteAdd)
case d.RemoteDB != nil && d.RemoteScan == nil:
result.Register(ChangeRemoteDelete)
case !d.RemoteDB.Equal(d.RemoteScan):
result.Register(ChangeRemoteUpdate)
}
return result
}
func (s *state) GetRelativeNames() []string {
s.lock.Lock()
defer s.lock.Unlock()
out := []string{}
for k := range s.files {
out = append(out, k)
}
sort.Strings(out)
return out
}
func (s *state) Set(side, source string, info providers.FileInfo) {
s.lock.Lock()
defer s.lock.Unlock()
if _, ok := s.files[info.RelativeName]; !ok {
s.files[info.RelativeName] = &stateDetail{}
}
switch strings.Join([]string{side, source}, "::") {
case "local::db":
s.files[info.RelativeName].LocalDB = &info
case "local::scan":
s.files[info.RelativeName].LocalScan = &info
case "remote::db":
s.files[info.RelativeName].RemoteDB = &info
case "remote::scan":
s.files[info.RelativeName].RemoteScan = &info
}
}