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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495package cli
import ( "fmt" "io" "os" "path/filepath" "unicode/utf8"
"github.com/alyraffauf/tg/internal/app" "github.com/spf13/cobra")
const bytesPerMiB = 1 << 20
// maxStringContents caps string contents at 100 MiB, a client-side sanity// limit for a text record.const maxStringContents = 100 * bytesPerMiB
func newStringCreateCommand(service *app.Service) *cobra.Command { var description, filenameFlag string
command := &cobra.Command{ Use: "create [<file>]", Short: "Create a string on your Tangled account", Long: `Create a string on your Tangled account.
Contents are read from the given file, or from standard input if no fileis given (or the file is "-"). When reading from standard input,--filename is required. Contents must be valid UTF-8, at most 100 MiB.Requires authentication (run "tg auth login" first).`, Args: cobra.MaximumNArgs(1), RunE: func(cmd *cobra.Command, args []string) error { ctx := cmd.Context()
contents, filename, err := stringContents(cmd.InOrStdin(), args, filenameFlag) if err != nil { return err }
result, err := service.CreateString(ctx, app.CreateStringInput{ Filename: filename, Description: description, Contents: contents, }) if err != nil { return err } return output(cmd, result, func(result *app.CreatedRecordResult) { fmt.Fprintf(cmd.OutOrStdout(), "Created string %s\n", result.URI) }) }, } command.Flags().StringVarP(&description, "description", "d", "", "Description of the string") command.Flags().StringVarP(&filenameFlag, "filename", "f", "", "Filename for the string (defaults to the file's basename)") return command}
// stringContents reads string contents from the file named in args (or stdin// when absent or "-") and resolves the filename: the flag wins, then the// file's basename. Contents must be non-empty, valid UTF-8, and within// maxStringContents.func stringContents(stdin io.Reader, args []string, filenameFlag string) (contents, filename string, err error) { if len(args) == 0 || args[0] == "-" { if filenameFlag == "" { return "", "", fmt.Errorf("provide --filename when reading from standard input") } data, err := io.ReadAll(stdin) if err != nil { return "", "", fmt.Errorf("read standard input: %w", err) } contents, filename = string(data), filenameFlag } else { data, err := os.ReadFile(args[0]) if err != nil { return "", "", fmt.Errorf("read file %q: %w", args[0], err) } contents, filename = string(data), filenameFlag if filename == "" { filename = filepath.Base(args[0]) } }
if contents == "" { return "", "", fmt.Errorf("contents must not be empty") } if len(contents) > maxStringContents { return "", "", fmt.Errorf("contents exceed the %d MiB limit", maxStringContents/bytesPerMiB) } if !utf8.ValidString(contents) { return "", "", fmt.Errorf("contents must be valid UTF-8") } return contents, filename, nil}