Add CLI commands and improve project functionality

Author: s1thu

cmd/add.go

@@ -0,0 +1,44 @@
+package cmd
+
+import (
+	"fmt"
+	"to_do_cli/todo"
+
+	"github.com/spf13/cobra"
+)
+
+var addCmd = &cobra.Command{
+	Use:   "add [task description]",
+	Short: "Add a new task to the todo list",
+	Args:  cobra.ExactArgs(1),
+	Run: func(cmd *cobra.Command, args []string) {
+		taskName := args[0]
+
+		tasks, err := todo.LoadTasks("tasks.json")
+		if err != nil {
+			fmt.Printf("Error loading tasks: %v\n", err)
+			return
+		}
+
+		m := todo.NewManager()
+		for _, t := range tasks {
+			m.AddTask(t.Name)
+			if t.Completed {
+				_ = m.CompletedTask(t.ID)
+			}
+		}
+
+		task := m.AddTask(taskName)
+		err = todo.SaveTasks("tasks.json", m.GetTasks())
+		if err != nil {
+			fmt.Println("Error saving tasks:", err)
+			return
+		}
+
+		fmt.Println("✅ Added task:", task.Name)
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(addCmd)
+}

cmd/list.go

@@ -0,0 +1,26 @@
+package cmd
+
+import (
+	"fmt"
+	"to_do_cli/todo"
+
+	"github.com/spf13/cobra"
+)
+
+var listCmd = &cobra.Command{
+	Use:   "list",
+	Short: "List all tasks in the todo list",
+	Run: func(cmd *cobra.Command, args []string) {
+		tasks, err := todo.LoadTasks("tasks.json")
+		if err != nil {
+			fmt.Printf("Error loading tasks: %v\n", err)
+			return
+		}
+
+		fmt.Println(tasks)
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(listCmd)
+}

cmd/root.go

@@ -0,0 +1,16 @@
+package cmd
+
+import "github.com/spf13/cobra"
+
+var rootCmd = &cobra.Command{
+	Use:   "todo",
+	Short: "A simple command line todo application",
+	Long:  `A simple command line todo application to manage your tasks.`,
+	Run: func(cmd *cobra.Command, args []string) {
+		cmd.Help() // Display help if no subcommand is provided
+	},
+}
+
+func Execute() error {
+	return rootCmd.Execute()
+}

go.mod

@@ -1,3 +1,9 @@
 module to_do_cli
 
 go 1.24.1
+
+require (
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/spf13/cobra v1.9.1 // indirect
+	github.com/spf13/pflag v1.0.6 // indirect
+)

go.sum

@@ -0,0 +1,10 @@
+github.com/cpuguy83/go-md2man/v2 v2.0.6/go.mod h1:oOW0eioCTA6cOiMLiUPZOpcVxMig6NIQQ7OS05n1F4g=
+github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
+github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
+github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
+github.com/spf13/cobra v1.9.1 h1:CXSaggrXdbHK9CF+8ywj8Amf7PBRmPCOJugH954Nnlo=
+github.com/spf13/cobra v1.9.1/go.mod h1:nDyEzZ8ogv936Cinf6g1RU9MRY64Ir93oCnqb9wxYW0=
+github.com/spf13/pflag v1.0.6 h1:jFzHGLGAlb3ruxLB8MhbI6A8+AQX/2eW4qeyNZXNp2o=
+github.com/spf13/pflag v1.0.6/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

main.go

@@ -1 +1,13 @@
 package main
+
+import (
+	"fmt"
+	"to_do_cli/cmd"
+)
+
+func main() {
+	err := cmd.Execute()
+	if err != nil {
+		fmt.Printf("Error executing command: %v\n", err)
+	}
+}

tasks.json

@@ -0,0 +1,16 @@
+[
+  {
+    "id": 1,
+    "name": "hello",
+    "completed": false,
+    "created_at": "2025-07-27T20:30:05.4113+06:30",
+    "updated_at": "2025-07-27T20:30:05.4113+06:30"
+  },
+  {
+    "id": 2,
+    "name": "Complete project documentation",
+    "completed": false,
+    "created_at": "2025-07-27T20:30:05.4113+06:30",
+    "updated_at": "2025-07-27T20:30:05.4113+06:30"
+  }
+]

to_do_cli

@@ -1 +1,40 @@
 package todo
+
+import (
+	"encoding/json"
+	"os"
+)
+
+func SaveTasks(filename string, tasks []Task) error {
+	data, err := json.Marshal(tasks)
+	if err != nil {
+		return err
+	}
+	return os.WriteFile(filename, data, 0644)
+}
+
+func LoadTasks(filename string) ([]Task, error) {
+	_, err := os.Stat(filename) // Ensure the file exists
+	if os.IsNotExist(err) {
+		return nil, nil // Return empty slice if file does not exist
+	}
+	if err != nil {
+		return nil, err // Return error if there is another issue
+	}
+
+	data, err := os.ReadFile(filename)
+	if err != nil {
+		return nil, err
+	}
+
+	if len(data) == 0 {
+		return []Task{}, nil // 🛠️ <- Fix: Handle empty file
+	}
+
+	var tasks []Task
+	err = json.Unmarshal(data, &tasks)
+	if err != nil {
+		return nil, err
+	}
+	return tasks, nil
+}

todo/storage.go

@@ -1 +1,30 @@
 package todo
+
+import "testing"
+
+func TestSaveTask(t *testing.T) {
+	tasks := []Task{
+		{ID: 1, Name: "Test Task 1", Completed: false},
+		{ID: 2, Name: "Test Task 2", Completed: true},
+	}
+
+	err := SaveTasks("test_tasks.json", tasks)
+	if err != nil {
+		t.Fatalf("Failed to save tasks: %v", err)
+	}
+}
+
+func TestLoadTask(t *testing.T) {
+	tasks, err := LoadTasks("test_tasks.json")
+	if err != nil {
+		t.Fatalf("Failed to load tasks: %v", err)
+	}
+
+	if len(tasks) != 2 {
+		t.Fatalf("Expected 2 tasks, got %d", len(tasks))
+	}
+
+	if tasks[0].Name != "Test Task 1" || tasks[1].Name != "Test Task 2" {
+		t.Fatalf("Loaded tasks do not match expected values")
+	}
+}