Refactor: Split into more packages to reduce server binary size

syncserver/server.go

@@ -0,0 +1,60 @@
+package syncserver
+
+import (
+	"fmt"
+	"os"
+	"strings"
+	"time"
+
+	"github.com/rwinkhart/go-boilerplate/back"
+	"github.com/rwinkhart/libmutton/global"
+	"github.com/rwinkhart/libmutton/synccommon"
+)
+
+// GetRemoteDataFromServer prints to stdout the remote entries, mod times, folders, and deletions.
+// Lists in output are separated by FSSpace.
+// Output is meant to be captured over SSH for interpretation by the client.
+func GetRemoteDataFromServer(clientDeviceID string) {
+	entryList, dirList := synccommon.WalkEntryDir()
+	modList := synccommon.GetModTimes(entryList)
+	deletionsList, err := os.ReadDir(global.ConfigDir + global.PathSeparator + "deletions")
+	if err != nil {
+		back.PrintError("Failed to read the deletions directory: "+err.Error(), back.ErrorRead, true)
+	}
+
+	// print the current UNIX timestamp to stdout
+	fmt.Print(time.Now().Unix())
+
+	// print the lists to stdout
+	// entry list
+	fmt.Print(global.FSSpace)
+	for _, entry := range entryList {
+		fmt.Print(global.FSMisc + entry)
+	}
+
+	// modification time list
+	fmt.Print(global.FSSpace)
+	for _, mod := range modList {
+		fmt.Print(global.FSMisc)
+		fmt.Print(mod)
+	}
+
+	// directory/folder list
+	fmt.Print(global.FSSpace)
+	for _, dir := range dirList {
+		fmt.Print(global.FSMisc + dir)
+	}
+
+	// deletions list
+	fmt.Print(global.FSSpace)
+	for _, deletion := range deletionsList {
+		// print deletion if it is relevant to the current client device
+		affectedIDTargetLocationIncomplete := strings.Split(deletion.Name(), global.FSSpace)
+		if affectedIDTargetLocationIncomplete[0] == clientDeviceID {
+			fmt.Print(global.FSMisc + strings.ReplaceAll(affectedIDTargetLocationIncomplete[1], global.FSPath, "/"))
+
+			// assume successful client deletion and remove deletions file (if assumption is somehow false, worst case scenario is that the client will re-upload the deleted entry)
+			_ = os.Remove(global.ConfigDir + global.PathSeparator + "deletions" + global.PathSeparator + deletion.Name()) // error ignored; function not run from a user-facing argument and thus the error would not be visible
+		}
+	}
+}