refactoring, adding cli to edit config

cmd/cli/commands/edit/edit.go

@@ -0,0 +1,99 @@
+package edit
+
+import (
+	"context"
+	"downloadhub/pkg/data"
+	"flag"
+	"fmt"
+	"os"
+
+	"github.com/google/subcommands"
+)
+
+type (
+	EditCmd struct {
+		slug        string
+		name        string
+		description string
+		version     string
+		iconURL     string
+		out         string
+	}
+)
+
+func (*EditCmd) Name() string     { return "edit" }
+func (*EditCmd) Synopsis() string { return "edit an entry" }
+func (*EditCmd) Usage() string {
+	return `Usage: ./cli edit [OPTIONS] SLUG
+
+Options:
+`
+}
+
+func (p *EditCmd) SetFlags(f *flag.FlagSet) {
+	f.StringVar(&p.slug, "slug", "", "")
+	f.StringVar(&p.name, "name", "", "")
+	f.StringVar(&p.description, "description", "", "")
+	f.StringVar(&p.version, "version", "0.0.0", "")
+	f.StringVar(&p.iconURL, "icon", "", "an url or a path to the icon")
+	f.StringVar(&p.out, "out", "./config.json", "path to the configuration file")
+}
+
+func (p *EditCmd) Execute(_ context.Context, f *flag.FlagSet, _ ...interface{}) subcommands.ExitStatus {
+	if f.NArg() == 0 {
+		fmt.Fprintln(os.Stderr, "error: slug cannot be empty")
+		return subcommands.ExitUsageError
+	}
+
+	if f.NArg() > 1 {
+		fmt.Fprintln(os.Stderr, "error: this command cannot take more than 1 argument")
+		return subcommands.ExitUsageError
+	}
+
+	d, err := data.Load(p.out)
+	if err != nil {
+		fmt.Fprintln(os.Stderr, "error:", err)
+		return subcommands.ExitFailure
+	}
+
+	var found bool
+	for i, soft := range d.Softwares {
+		if soft.Slug == f.Arg(0) {
+			if len(p.slug) > 0 {
+				soft.Slug = p.slug
+			}
+
+			if len(p.name) > 0 {
+				soft.Name = p.name
+			}
+
+			if len(p.description) > 0 {
+				soft.Description = p.description
+			}
+
+			if len(p.version) > 0 {
+				soft.Version = p.version
+			}
+
+			if len(p.iconURL) > 0 {
+				soft.IconURL = p.iconURL
+			}
+
+			d.Softwares[i] = soft
+			found = true
+			break
+		}
+	}
+
+	if !found {
+		fmt.Fprintf(os.Stderr, "error: slug '%s' cannot be found\n", f.Arg(0))
+		return subcommands.ExitFailure
+	}
+
+	if err := data.Save(d, p.out); err != nil {
+		fmt.Fprintln(os.Stderr, "error:", err)
+		return subcommands.ExitFailure
+	}
+
+	return subcommands.ExitSuccess
+}