First commit

part3-taskcli/main.go

@@ -0,0 +1,68 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strings"
+)
+
+func main() {
+	store := NewStore()
+	fmt.Println("taskcli — commands: add <title>, done <id>, list, quit")
+	scanner := bufio.NewScanner(os.Stdin)
+	for {
+		fmt.Print("> ")
+		if !scanner.Scan() {
+			return
+		}
+		line := strings.TrimSpace(scanner.Text())
+		if line == "" {
+			continue
+		}
+		command, rest, _ := strings.Cut(line, " ")
+		switch command {
+		case "add":
+			if rest == "" {
+				fmt.Println("usage: add <title>")
+				continue
+			}
+			task := store.Add(rest)
+			fmt.Printf("added #%d %s\n", task.ID, task.Title)
+		case "done":
+			id, err := ParseID(rest)
+			if err != nil {
+				fmt.Println("error:", err)
+				continue
+			}
+			if err := store.Complete(id); err != nil {
+				fmt.Println("error:", err)
+				continue
+			}
+			fmt.Printf("completed #%d\n", id)
+		case "list":
+			printList(store)
+		case "quit":
+			return
+		default:
+			fmt.Println("unknown command:", command)
+		}
+	}
+}
+
+func printList(store *Store) {
+	widest := 0
+	for _, task := range store.All() {
+		if w := task.TitleWidth(); w > widest {
+			widest = w
+		}
+	}
+	for _, task := range store.All() {
+		mark := " "
+		if task.Done {
+			mark = "x"
+		}
+		padding := strings.Repeat(" ", widest-task.TitleWidth())
+		fmt.Printf("#%d %s%s [%s]\n", task.ID, task.Title, padding, mark)
+	}
+}