Improve editor package and add-task command

cmd/addTask.go

@@ -28,33 +28,34 @@ And add a task using the editor.
 				return err
 			}
 
-			name := strings.Join(args, " ")
-			if name != "" {
-				err = task.AddTask(config.TaskFile, name)
+			var newTasks []string
+
+			if len(args) > 0 {
+				newTasks = append(newTasks, strings.Join(args, " "))
+			}
+
+			if len(newTasks) == 0 {
+				lines, err := editor.ContentsByLine(initialText)
 				if err != nil {
 					return err
 				}
-				fmt.Printf("add %s\n", name)
-				return nil
-			}
 
-			ts, err := editor.GetSliceText(initialText)
-			if err != nil {
-				return err
-			}
+				for _, l := range lines {
+					// ignore empty string and comment
+					if l == "" || strings.HasPrefix(l, "#") {
+						continue
+					}
 
-			for _, t := range ts {
-				if t == "" {
-					continue
-				}
-				if strings.HasPrefix(t, "#") {
-					continue
+					newTasks = append(newTasks, l)
 				}
-				err = task.AddTask(config.TaskFile, t)
-				if err != nil {
+			}
+
+			for _, newTask := range newTasks {
+				if err := task.AddTask(config.TaskFile, newTask); err != nil {
 					return err
 				}
-				fmt.Printf("add %s\n", t)
+
+				fmt.Printf("added '%s'\n", newTask)
 			}
 
 			return nil

internal/editor/editor.go

@@ -2,13 +2,13 @@
 package editor
 
 import (
-	"bufio"
 	"os"
 	"os/exec"
+	"strings"
 )
 
-// GetSliceText get slice text edited with editor.
-func GetSliceText(initialText string) ([]string, error) {
+// ContentsByLine gets contents edited with editor by line.
+func ContentsByLine(initialText string) ([]string, error) {
 	tmpfile, err := os.CreateTemp("", "gomodoro")
 	if err != nil {
 		return nil, err
@@ -24,32 +24,19 @@ func GetSliceText(initialText string) ([]string, error) {
 		return nil, err
 	}
 
-	if err = openEditor(tmpfile.Name()); err != nil {
+	if err = edit(tmpfile.Name()); err != nil {
 		return nil, err
 	}
 
-	f, err := os.Open(tmpfile.Name())
+	b, err := os.ReadFile(tmpfile.Name())
 	if err != nil {
 		return nil, err
 	}
-	defer func() {
-		_ = f.Close()
-	}()
-
-	ts := make([]string, 0)
-	scanner := bufio.NewScanner(f)
-	for scanner.Scan() {
-		ts = append(ts, scanner.Text())
-	}
-
-	if err := scanner.Err(); err != nil {
-		return nil, err
-	}
 
-	return ts, nil
+	return strings.Split(string(b), "\n"), nil
 }
 
-func openEditor(filepath string) error {
+func edit(filepath string) error {
 	cmdName := "vi"
 	if e := os.Getenv("EDITOR"); e != "" {
 		cmdName = e