feat: global structure for the project

gotask-cli.go

@@ -0,0 +1,126 @@
+package main
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"os"
+	"time"
+
+	"github.com/jedib0t/go-pretty/v6/table"
+)
+
+type Status int
+
+const (
+	todo Status = iota
+	doing
+	done
+)
+
+const path string = "./tasks.json"
+
+var statusName = map[Status]string{
+	todo:  "todo",
+	doing: "doing",
+	done:  "done",
+}
+
+type task struct {
+	Id          uint
+	Description string
+	Status      Status
+	Created     int64
+	Updated     int64
+}
+
+var backlog []task
+
+func initBacklog() {
+	if _, err := os.Stat(path); err == nil {
+		loadBacklog()
+
+	} else if errors.Is(err, os.ErrNotExist) {
+		// path does not exist
+		f, err := os.Create(path)
+		check(err)
+		defer f.Close()
+		loadBacklog()
+
+	} else {
+		check(err)
+		os.Exit(1)
+	}
+}
+
+func loadBacklog() {
+	content, err := os.ReadFile(path)
+	check(err)
+	err = json.Unmarshal([]byte(content), &backlog)
+	check(err)
+}
+
+func check(e error) {
+	if e != nil {
+		panic(e)
+	}
+}
+
+func printTasksAsATable(tasks []task) {
+	t := table.NewWriter()
+	t.SetOutputMirror(os.Stdout)
+	t.AppendHeader(table.Row{"Id", "Description", "Status", "Created", "Updated"})
+	for _, v := range tasks {
+		var updated string
+		if v.Updated == -1 {
+			updated = ""
+		} else {
+			updated = time.Unix(v.Updated, 0).Format(time.DateTime)
+		}
+		t.AppendRow([]interface{}{
+			v.Id,
+			v.Description,
+			statusName[v.Status],
+			time.Unix(v.Created, 0).Format(time.DateTime),
+			updated,
+		})
+	}
+	t.Render()
+}
+
+func addTask(desc string) {
+
+	newtask := task{
+		Id:          1,
+		Description: desc,
+		Status:      0,
+		Created:     time.Now().Unix(),
+		Updated:     -1}
+
+	fmt.Printf("New task \"%s\" added to do @ id=%d", newtask.Description, newtask.Id)
+
+}
+
+func main() {
+	initBacklog()
+	if len(os.Args[1:]) >= 1 {
+		switch os.Args[1] {
+		case "help":
+			fmt.Println("S.O.S!")
+		case "add":
+			if len(os.Args[1:]) >= 2 {
+				addTask(os.Args[2])
+			} else {
+				fmt.Println("Missing argument")
+			}
+
+		case "list":
+			printTasksAsATable(backlog)
+		default:
+			fmt.Println("NO !")
+		}
+		// saveBacklog()
+	} else {
+		fmt.Println("Missing argument")
+	}
+}