Implement reading in file lists

cmd/cloudbox/sync.go

@@ -39,7 +39,7 @@ func execSync() error {
 		return errors.Wrap(err, "Unable to establish database connection")
 	}
 
-	s := sync.New(local, remote, db, conf.Sync.Settings)
+	s := sync.New(local, remote, db, conf.Sync.Settings, log.NewEntry(log.StandardLogger()))
 
 	sigchan := make(chan os.Signal, 1)
 	signal.Notify(sigchan, syscall.SIGINT, syscall.SIGTERM)

providers/local/provider.go

@@ -6,6 +6,7 @@ import (
 	"io"
 	"os"
 	"path"
+	"path/filepath"
 	"strings"
 	"time"
 
@@ -31,7 +32,36 @@ func (p Provider) Name() string                       { return "local" }
 func (p Provider) GetChecksumMethod() hash.Hash       { return sha256.New() }
 
 func (p Provider) ListFiles() ([]providers.File, error) {
-	return nil, errors.New("Not implemented")
+	var (
+		absPath string
+		err     error
+		files   []providers.File
+	)
+
+	if absPath, err = filepath.Abs(p.directory); err != nil {
+		return nil, errors.Wrap(err, "Unable to calculate absolute path")
+	}
+
+	err = filepath.Walk(absPath, func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+
+		if info.IsDir() {
+			// We behave like git: We don't care about dirs themselves
+			return nil
+		}
+
+		files = append(files, File{
+			info:         info,
+			relativeName: strings.TrimLeft(strings.TrimPrefix(path, absPath), "/"),
+			fullPath:     path,
+		})
+
+		return nil
+	})
+
+	return files, errors.Wrap(err, "File listing failed")
 }
 
 func (p Provider) DeleteFile(relativeName string) error {

sync/db.go

@@ -62,3 +62,23 @@ func (s *Sync) setDBFileInfo(side, info providers.FileInfo) error {
 	_, err = stmt.Exec(info.RelativeName, info.LastModified, info.Checksum, info.Size)
 	return errors.Wrap(err, "Unable to upsert file info")
 }
+
+func (s *Sync) updateStateFromDatabase(st *state) error {
+	for _, table := range []string{sideLocal, sideRemote} {
+		rows, err := s.db.Query(fmt.Sprintf("SELECT * FROM %s_state", table))
+		if err != nil {
+			return errors.Wrapf(err, "Unable to query table %s", table)
+		}
+		defer rows.Close()
+
+		for rows.Next() {
+			info := providers.FileInfo{}
+			if err = rows.Scan(&info.RelativeName, &info.LastModified, &info.Checksum, &info.Size); err != nil {
+				return errors.Wrap(err, "Unable to read response")
+			}
+			st.Set(table, sourceDB, info)
+		}
+	}
+
+	return nil
+}

sync/state.go

@@ -27,8 +27,13 @@ func (c *Change) Register(add Change) {
 	*c = *c | add
 }
 
-func (c Change) Has(test Change) bool {
-	return c&test != 0
+func (c Change) HasOne(test ...Change) bool {
+	for _, t := range test {
+		if c&t != 0 {
+			return true
+		}
+	}
+	return false
 }
 
 func (c Change) Is(test Change) bool {
@@ -36,10 +41,10 @@ func (c Change) Is(test Change) bool {
 }
 
 const (
-	SideLocal  string = "local"
-	SideRemote string = "remote"
-	SourceDB   string = "db"
-	SourceScan string = "scan"
+	sideLocal  string = "local"
+	sideRemote string = "remote"
+	sourceDB   string = "db"
+	sourceScan string = "scan"
 )
 
 type stateDetail struct {
@@ -120,22 +125,22 @@ func (s *state) GetRelativeNames() []string {
 	return out
 }
 
-func (s *state) Set(side, source, relativeName string, info providers.FileInfo) {
+func (s *state) Set(side, source string, info providers.FileInfo) {
 	s.lock.Lock()
 	defer s.lock.Unlock()
 
-	if _, ok := s.files[relativeName]; !ok {
-		s.files[relativeName] = &stateDetail{}
+	if _, ok := s.files[info.RelativeName]; !ok {
+		s.files[info.RelativeName] = &stateDetail{}
 	}
 
 	switch strings.Join([]string{side, source}, "::") {
 	case "local::db":
-		s.files[relativeName].LocalDB = &info
+		s.files[info.RelativeName].LocalDB = &info
 	case "local::scan":
-		s.files[relativeName].LocalScan = &info
+		s.files[info.RelativeName].LocalScan = &info
 	case "remote::db":
-		s.files[relativeName].RemoteDB = &info
+		s.files[info.RelativeName].RemoteDB = &info
 	case "remote::scan":
-		s.files[relativeName].RemoteScan = &info
+		s.files[info.RelativeName].RemoteScan = &info
 	}
 }

sync/sync.go

@@ -2,9 +2,11 @@ package sync
 
 import (
 	"database/sql"
+	"hash"
 	"time"
 
 	"github.com/pkg/errors"
+	log "github.com/sirupsen/logrus"
 
 	"github.com/Luzifer/cloudbox/providers"
 )
@@ -19,16 +21,20 @@ type Sync struct {
 	conf          SyncConfig
 	local, remote providers.CloudProvider
 
+	log *log.Entry
+
 	stop chan struct{}
 }
 
-func New(local, remote providers.CloudProvider, db *sql.DB, conf SyncConfig) *Sync {
+func New(local, remote providers.CloudProvider, db *sql.DB, conf SyncConfig, logger *log.Entry) *Sync {
 	return &Sync{
 		db:     db,
 		conf:   conf,
 		local:  local,
 		remote: remote,
 
+		log: logger,
+
 		stop: make(chan struct{}),
 	}
 }
@@ -38,16 +44,14 @@ func (s *Sync) Run() error {
 		return errors.Wrap(err, "Unable to initialize database schema")
 	}
 
-	var (
-		hashMethod  = s.remote.GetChecksumMethod()
-		refresh     = time.NewTimer(s.conf.ScanInterval)
-		useChecksum = s.remote.Capabilities().Has(providers.CapAutoChecksum) || s.conf.ForceUseChecksum
-	)
+	var refresh = time.NewTimer(s.conf.ScanInterval)
 
 	for {
 		select {
 		case <-refresh.C:
-			// TODO: Execute rescan & sync
+			if err := s.runSync(); err != nil {
+				return errors.Wrap(err, "Sync failed")
+			}
 			refresh.Reset(s.conf.ScanInterval)
 
 		case <-s.stop:
@@ -57,3 +61,50 @@ func (s *Sync) Run() error {
 }
 
 func (s *Sync) Stop() { s.stop <- struct{}{} }
+
+func (s *Sync) fillStateFromProvider(syncState *state, provider providers.CloudProvider, side string, useChecksum bool, hashMethod hash.Hash) error {
+	files, err := provider.ListFiles()
+	if err != nil {
+		return errors.Wrap(err, "Unable to list files")
+	}
+
+	for _, f := range files {
+		info := f.Info()
+		if useChecksum && info.Checksum == "" {
+			cs, err := f.Checksum(hashMethod)
+			if err != nil {
+				return errors.Wrap(err, "Unable to fetch checksum")
+			}
+			info.Checksum = cs
+		}
+
+		syncState.Set(side, sourceScan, info)
+	}
+
+	return nil
+}
+
+func (s *Sync) runSync() error {
+	var (
+		hashMethod  = s.remote.GetChecksumMethod()
+		syncState   = newState()
+		useChecksum = s.remote.Capabilities().Has(providers.CapAutoChecksum) || s.conf.ForceUseChecksum
+	)
+
+	if err := s.updateStateFromDatabase(syncState); err != nil {
+		return errors.Wrap(err, "Unable to load database state")
+	}
+
+	if err := s.fillStateFromProvider(syncState, s.local, sideLocal, useChecksum, hashMethod); err != nil {
+		return errors.Wrap(err, "Unable to load local files")
+	}
+
+	if err := s.fillStateFromProvider(syncState, s.remote, sideRemote, useChecksum, hashMethod); err != nil {
+		return errors.Wrap(err, "Unable to load remote files")
+	}
+
+	// TODO: Do something with sync database
+	s.log.Printf("%#v", syncState)
+
+	return nil
+}