cli.ts

// deno-lint-ignore-file camelcase no-dupe-else-if
import {
  base85decode,
  base85encode,
  Command,
  getStdinBufferSync,
  readAllSync,
  version,
} from "./deps.ts";

try {
  let file: Uint8Array;
  let stdin: Uint8Array;
  let filled: boolean;
  let args_judge: boolean;
  const isatty: boolean = Deno.isatty(Deno.stdin.rid);
  if (!isatty) {
    const input = getStdinBufferSync({ exitOnEnter: false });
    if (input.length !== 0) {
      stdin = input;
      filled = stdin.length! !== 0 ? true : false;
    } else if (!Deno.args[0].match(/-d|--decode|-h|--help|-V|--version/)) {
      try {
        args_judge = true;
        stdin = readAllSync(Deno.openSync(Deno.args[0]));
        Deno.close(Deno.openSync(Deno.args[0]).rid);
        filled = stdin.length !== 0 ? true : false;
      } catch {
        throw new Error("base85: No such file or directory");
      }
    } else if (Deno.args[1]) {
      try {
        args_judge = false;
        stdin = readAllSync(Deno.openSync(Deno.args[1]));
        Deno.close(Deno.openSync(Deno.args[1]).rid);
        filled = stdin.length !== 0 ? true : false;
      } catch {
        throw new Error("base85: No such file or directory");
      }
    }
  } else if (Deno.args[0] !== undefined) {
    args_judge = Deno.args[0].match(/-d|--decode|-h|--help|-V|--version/)
      ? true
      : false;
    if (!args_judge) {
      try {
        file = readAllSync(Deno.openSync(Deno.args[0]));
        Deno.close(Deno.openSync(Deno.args[0]).rid);
        filled = file.length !== 0 ? true : false;
      } catch {
        throw new Error("base85: No such file or directory");
      }
    } else if (Deno.args[1]) {
      try {
        file = readAllSync(Deno.openSync(Deno.args[1]));
        Deno.close(Deno.openSync(Deno.args[1]).rid);
        filled = file.length !== 0 ? true : false;
      } catch {
        throw new Error("base85: No such file or directory");
      }
    }
  }
  const { options, args } = await new Command()
    .name("base85")
    .description(
      "Base85 (Ascii85 with Adobe Escape Sequence) encode or decode FILE, or standard input, to standard output.",
    )
    .version(version())
    .option("-d, --decode", "Decode data")
    .arguments("<option>")
    .parse(
      !isatty
        ? (args_judge!
          ? [[...stdin!].join(",")]
          : [Deno.args[0], [...stdin!].join(",")].filter(Boolean))
        : !file!
        ? Deno.args
        : !args_judge!
        ? [[...file!].join(",")]
        : [Deno.args[0], [...file!].join(",")],
    );
  const { decode } = options;
  const runner: ((str: string) => Uint8Array) | ((byte: Uint8Array) => string) =
    decode ? base85decode : base85encode;
  const convert: () => void = (): void => {
    const args2Unit8Array: Uint8Array = new Uint8Array(args[0].split(","));
    const input: Uint8Array | string = decode
      ? new TextDecoder().decode(args2Unit8Array).replace(/\n$/g, "")
      : args2Unit8Array;
    const result: string | Uint8Array = runner(input! as Uint8Array & string);
    typeof result === "string"
      ? console.log(result)
      : Deno.stdout.writeSync(result);
  };
  if (filled!) {
    convert();
  } else if (!isatty && filled!) {
    convert();
  } else if (file! && filled!) {
    convert();
  } else {
    throw new Error("base85: No such file or directory");
  }
} catch (e) {
  console.error(e.message);
  Deno.exit(1);
}