Re-add the ability to view or edit the latest zet

Signed-off-by: Oliver Davies <oliver@oliverdavies.uk>

cmd/view.go

@@ -14,19 +14,29 @@ var viewCmd = &cobra.Command{
 	Use:     "view",
 	Aliases: []string{"v"},
 	Short:   "View a specific zettel",
-	Long:    `zet view|v ID`,
+	Long: `zet view|v ID
+zet view|v latest
+	`,
 	Run: func(cmd *cobra.Command, args []string) {
 		if len(args) < 1 {
 			fmt.Println("Error: No id provided")
 			os.Exit(1)
 		}
 
-		idInt, err := strconv.Atoi(args[0])
+		var id int
 
-		if err != nil {
-			os.Exit(1)
+		if args[0] == "latest" {
+			id = lib.GetLatestZet()
+		} else {
+			i, err := strconv.Atoi(args[0])
+
+			if err != nil {
+				os.Exit(1)
+			}
+
+			id = i
 		}
 
-		fmt.Println(lib.ViewZet(idInt))
+		fmt.Println(lib.ViewZet(id))
 	},
 }