new line on terminal size

cmd/ls.go

@@ -18,9 +18,11 @@ package cmd
 
 import (
 	"os"
+	"time"
 
 	"github.com/jedib0t/go-pretty/v6/table"
 	"github.com/spf13/cobra"
+	"golang.org/x/sys/unix"
 )
 
 // lsCmd represents the ls command
@@ -35,17 +37,40 @@ This application is a tool to generate the needed files
 to quickly create a Cobra application.`,
 	Run: func(cmd *cobra.Command, args []string) {
 		todos := getAllTodos()
+		ws, err := unix.IoctlGetWinsize(int(os.Stdin.Fd()), unix.TIOCGWINSZ)
+		errPanic(err, "failed to determine terminal width")
+		cols := int(ws.Col)
 		t := table.NewWriter()
 		t.SetOutputMirror(os.Stdout)
 		t.AppendHeader(table.Row{"#", "Description", "Due date"})
 		for _, todo := range todos {
-			t.AppendRow([]interface{}{todo.ID, todo.Desc, todo.DueDate.Format("02/01/2006 15:04")})
+			date := todo.DueDate.Format("02/01/2006 15:04")
+			d := time.Time{}
+			if todo.DueDate == d {
+				date = ""
+			}
+			desc := todo.Desc
+			if len(desc) > (cols - 20) {
+				desc = insertNth(desc, cols-20)
+			}
+			t.AppendRow([]interface{}{todo.ID, desc, date})
 			// data[i] = []string{strconv.FormatUint(todo.ID, 10), todo.Desc, todo.DueDate.Format("")}
 		}
+		t.SetStyle(table.StyleLight)
+		t.SetAllowedRowLength(cols)
 		t.Render()
 	},
 }
 
+// insertNth inserts new line on each nth position.
+func insertNth(s string, n int) string {
+	for i := n - 1; i < len(s); i += n {
+		s = s[:i] + "\n" + s[i:]
+	}
+
+	return s
+}
+
 func init() {
 	rootCmd.AddCommand(lsCmd)