non-functional wip state

app/sync.go

@@ -0,0 +1,67 @@
+package app
+
+import (
+	"fmt"
+	"os"
+	"path"
+
+	"git.blackforestbytes.com/BlackForestBytes/goext/exerr"
+	"mikescher.com/kpsync/assets"
+	"mikescher.com/kpsync/log"
+)
+
+func (app *Application) initSync() error {
+
+	err := os.MkdirAll(app.config.WorkDir, os.ModePerm)
+	if err != nil {
+		return exerr.Wrap(err, "").Build()
+	}
+
+	app.dbFile = path.Join(app.config.WorkDir, path.Base(app.config.LocalFallback))
+	app.stateFile = path.Join(app.config.WorkDir, "kpsync.state")
+
+	state := app.readState()
+
+	needsDownload := true
+
+	if state != nil && fileExists(app.dbFile) {
+		localCS, err := app.calcLocalChecksum()
+		if err != nil {
+			log.LogError("Failed to calculate local database checksum", err)
+		} else if localCS == state.Checksum {
+			remoteETag, err := app.getRemoteETag()
+			if err != nil {
+				log.LogError("Failed to get remote ETag", err)
+			} else if remoteETag == state.ETag {
+
+				log.LogInfo(fmt.Sprintf("Found local database matching remote database - skip initial download"))
+				log.LogInfo(fmt.Sprintf("Checksum (cached)  := %s", state.Checksum))
+				log.LogInfo(fmt.Sprintf("Checksum (local)   := %s", localCS))
+				log.LogInfo(fmt.Sprintf("ETag (cached)      := %s", state.ETag))
+				log.LogInfo(fmt.Sprintf("ETag (remote)      := %s", remoteETag))
+				needsDownload = false
+
+			}
+		}
+	}
+
+	if needsDownload {
+		func() {
+			fin := app.setTrayState("Downloading database", assets.IconDefault)
+			defer fin()
+
+			log.LogInfo(fmt.Sprintf("Downloading remote database to %s", app.dbFile))
+
+			etag, err := app.downloadDatabase()
+			if err != nil {
+				log.LogError("Failed to download remote database", err)
+				app.sigErrChan <- exerr.Wrap(err, "Failed to download remote database").Build()
+				return
+			}
+		}()
+	}
+}
+
+func (app *Application) runSyncLoop() error {
+
+}