haushaltsdaten-supabase/scripts/convert-encoding.js at main · berlin/haushaltsdaten-supabase · GitHub

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#!/usr/bin/env node
//@ts-check
import iconv from "iconv-lite";
import { parseArgs } from "node:util";
import { existsSync, readFileSync, writeFileSync } from "node:fs";
import { resolve } from "path";

function help() {
  console.log(`
	=========================================================================================
	convert-encoding.js - Converts the encoding of a file

	USAGE:
			node convert-encoding.js --file <filename> --source-encoding <source-encoding> --target-encoding <target-encoding>

	OPTIONS:
			--file, -f <filename>           Specify the file to convert
			--source-encoding, -s <source-encoding>  Specify the source encoding
			--target-encoding, -t <target-encoding>  Specify the target encoding (default: utf-8)
			--help, -h                      Display this help message
	`);
  process.exit(0);
}
async function main() {
  try {
    const { values } = parseArgs({
      options: {
        help: {
          type: "boolean",
          short: "h",
        },
        file: {
          type: "string",
          short: "f",
        },
        "source-encoding": {
          type: "string",
          short: "s",
        },
        "target-encoding": {
          type: "string",
          short: "t",
          default: "utf-8",
        },
      },
    });

    // sanity checks

    if (values.help) {
      help();
    }
    if (typeof values.file !== "string") {
      throw new Error("file must be a string");
    }
    const filePath = resolve(process.cwd(), values.file);
    if (!existsSync(filePath)) {
      throw new Error("file does not exist");
    }

    if (!values["source-encoding"]) {
      throw new Error("source-encoding must be a string");
    }

    if (typeof values["source-encoding"] !== "string") {
      throw new Error("source-encoding must be a string");
    }

    if (typeof values["target-encoding"] !== "string") {
      throw new Error("target-encoding must be a string");
    }

    const sourceEncoding = values["source-encoding"];
    const targetEncoding = values["target-encoding"];

    const buffer = readFileSync(filePath);
    const str = iconv.decode(buffer, sourceEncoding);
    const targetFilePath = filePath
      .split(".")
      .map((e, i, a) => {
        if (i === a.length - 1) {
          return `${targetEncoding}.${e}`;
        }
        return `${e}`;
      })
      .join(".");

    writeFileSync(targetFilePath, str);
  } catch (error) {
    console.error(error.message);
    help();
    process.exit(1);
  }
}

main().catch(console.error);