feat: Add delete command

Ref: #26

src/delete.go

@@ -0,0 +1,107 @@
+package src
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"regexp"
+	"strings"
+
+	"github.com/caffeine-addictt/video-manager/src/utils"
+	"github.com/spf13/cobra"
+)
+
+var deleteFlags struct {
+	yes bool
+}
+
+var deleteCommand = &cobra.Command{
+	Use:     "delete [pattern]",
+	Aliases: []string{"del", "rm"},
+	Short:   "Delete videos from the source directory",
+	Args:    cobra.ExactArgs(1),
+	ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
+		filenames, err := utils.ReadDirectory(workingDir, 0)
+		if err != nil {
+			fmt.Println("Failed to read source directory:", err.Error())
+			os.Exit(1)
+		}
+
+		if toComplete == "" {
+			return filenames, cobra.ShellCompDirectiveNoFileComp
+		}
+
+		for i := 0; i < len(filenames); i++ {
+			match, err := regexp.MatchString(listFlags.query, filenames[i])
+			if err != nil {
+				return []string{"RegExp failed to match " + filenames[i] + ": " + err.Error()}, cobra.ShellCompDirectiveNoFileComp
+			}
+
+			if !match || strings.HasPrefix(filenames[i], toComplete) {
+				filenames[len(filenames)-1], filenames[i], filenames = "", filenames[len(filenames)-1], filenames[:len(filenames)-1]
+				i--
+			}
+		}
+
+		return filenames, cobra.ShellCompDirectiveNoFileComp
+	},
+	Run: func(cmd *cobra.Command, args []string) {
+		Info("Reading source directory")
+		filenames, err := utils.ReadDirectory(workingDir, 0)
+		if err != nil {
+			fmt.Println("Failed to read source directory:", err.Error())
+			os.Exit(1)
+		}
+
+		query := args[0]
+		if query == "" {
+			fmt.Println(utils.Multiline(
+				"Argument '' passed is too vague.",
+				"If you'd like to delete all files in the source directory, please pass the -a/--all flag or pass '.*' as the argument.",
+				"",
+				"See -h or --help for usage.",
+			))
+		}
+
+		for i := 0; i < len(filenames); i++ {
+			match, err := regexp.MatchString(query, filenames[i])
+
+			if (err != nil && !match) || (err == nil && !strings.HasPrefix(filenames[i], query)) {
+				Debug(fmt.Sprintf("%s does not contain or match %s", filenames[i], listFlags.query))
+				filenames[len(filenames)-1], filenames[i], filenames = "", filenames[len(filenames)-1], filenames[:len(filenames)-1]
+				i--
+				continue
+			}
+		}
+
+		if len(filenames) == 0 {
+			fmt.Println("No matching files found.")
+			os.Exit(1)
+		}
+
+		if !deleteFlags.yes {
+			fmt.Println(strings.Join(filenames, "\n"))
+			response := utils.InputPrompt("Delete these files? [y/N]")
+			switch strings.ToLower(response) {
+			case "y", "yes":
+				break
+			default:
+				os.Exit(0)
+			}
+		}
+
+		// Delete files
+		for _, filename := range filenames {
+			fileFullPath := filepath.Join(workingDir, filename)
+			if err := os.Remove(fileFullPath); err != nil {
+				fmt.Printf("Failed to delete %s: %s", filename, err.Error())
+				os.Exit(1)
+			}
+		}
+	},
+}
+
+func init() {
+	rootCommand.AddCommand(deleteCommand)
+	deleteCommand.Flags().BoolVarP(&deleteFlags.yes, "yes", "y", false, "Skip confirmation prompt (defaults to false)")
+}