feat: add confirmation for delete store

Close #23

cmd/store/delete.go

@@ -22,6 +22,7 @@ import (
 	"os"
 
 	"github.com/openfga/cli/internal/cmdutils"
+	"github.com/openfga/cli/internal/confirmation"
 	"github.com/openfga/cli/internal/output"
 	"github.com/spf13/cobra"
 )
@@ -34,6 +35,25 @@ var deleteCmd = &cobra.Command{
 	Example: "fga store delete --store-id=01H0H015178Y2V4CX10C2KGHF4",
 	RunE: func(cmd *cobra.Command, args []string) error {
 		clientConfig := cmdutils.GetClientConfig(cmd)
+		// First, confirm whether this is intended
+		force, err := cmd.Flags().GetBool("force")
+		if err != nil {
+			return fmt.Errorf("failed to obtain force flag %w", err)
+		}
+		if !force {
+			confirmation, err := confirmation.AskForConfirmation("Confirm you want to delete store:")
+			if err != nil {
+				return fmt.Errorf("prompt failed due to %w", err)
+			}
+			if !confirmation {
+				type returnMessage struct {
+					Message string
+				}
+
+				return output.Display(returnMessage{Message: "Delete store cancelled"}) //nolint:wrapcheck
+			}
+		}
+
 		fgaClient, err := clientConfig.GetFgaClient()
 		if err != nil {
 			return fmt.Errorf("failed to initialize FGA Client due to %w", err)
@@ -49,8 +69,10 @@ var deleteCmd = &cobra.Command{
 
 func init() {
 	deleteCmd.Flags().String("store-id", "", "Store ID")
+	deleteCmd.Flags().Bool("force", false, "Force delete without confirmation")
+
 	err := deleteCmd.MarkFlagRequired("store-id")
-	if err != nil { //nolint:wsl
+	if err != nil {
 		fmt.Print(err)
 		os.Exit(1)
 	}

internal/confirmation/confirmation.go

@@ -0,0 +1,56 @@
+/*
+Copyright © 2023 OpenFGA
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+	http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package confirmation
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strings"
+)
+
+// askForConfirmation is the internal implementation that prompt user to confirm their choice.
+// Default answer is no.
+func askForConfirmation(ioReader *bufio.Reader, question string) (bool, error) {
+	for {
+		_, err := fmt.Fprintln(os.Stdout, question+"(y/N)")
+		if err != nil {
+			return false, fmt.Errorf("unable to ask for confirmation with error %w", err)
+		}
+
+		s, err := ioReader.ReadString('\n')
+		if err != nil {
+			return false, fmt.Errorf("unable to read string with error %w", err)
+		}
+
+		trimmedString := strings.ToLower(strings.TrimSpace(s))
+		switch trimmedString {
+		case "":
+			return false, nil
+		case "y", "yes":
+			return true, nil
+		case "n", "no":
+			return false, nil
+		}
+	}
+}
+
+// AskForConfirmation will prompt user to confirm their choice.
+// Default answer is no.
+func AskForConfirmation(question string) (bool, error) {
+	return askForConfirmation(bufio.NewReader(os.Stdin), question)
+}

internal/confirmation/confirmation_test.go

@@ -0,0 +1,64 @@
+package confirmation
+
+import (
+	"bufio"
+	"strings"
+	"testing"
+)
+
+func TestConfirmation(t *testing.T) {
+	t.Parallel()
+
+	type test struct {
+		_name  string
+		input  string
+		result bool
+	}
+
+	tests := []test{
+		{
+			_name:  "default",
+			input:  "\n",
+			result: false,
+		},
+		{
+			_name:  "yes",
+			input:  "  Yes\n",
+			result: true,
+		},
+
+		{
+			_name:  "Y",
+			input:  "y\n",
+			result: true,
+		},
+		{
+			_name:  "NO",
+			input:  "NO\n",
+			result: false,
+		},
+		{
+			_name:  "n",
+			input:  "n\n",
+			result: false,
+		},
+		{
+			_name:  "other answer then no",
+			input:  "other\nn\n",
+			result: false,
+		},
+	}
+	for _, test := range tests {
+		test := test
+		t.Run(test._name, func(t *testing.T) {
+			t.Parallel()
+			result, err := askForConfirmation(bufio.NewReader(strings.NewReader(test.input)), "test")
+			if err != nil {
+				t.Error(err)
+			}
+			if result != test.result {
+				t.Errorf("Expect result %v actual %v", test.result, result)
+			}
+		})
+	}
+}