inputHandler.js

const program = require("commander");
const ll = require("lazylines");
const R = require("ramda");
const { changeFileTags, fileSatisfiesFilter } = require("./helpers.js");

const changeTagsOnInput = (changeFileFunc) => (process, tags, fileName) => {
  const message = changeFileTags(R.partial(changeFileFunc, [tags]), fileName);
  console.log(message);
};

const filterOnInput = (process, tags, fileName) => {
  if (fileSatisfiesFilter(tags, fileName)) {
    process.stdout.write(`${fileName}\n`);
  }
};

const onLine = (process, givenTags, onInputFunc) => (line) => {
  const fileName = ll.chomp(line);
  onInputFunc(process, givenTags, fileName);
};

const handleInput = (onInputFunc) => {
  program.parse(process.argv);
  const givenTags = program.args[0].split(",").map((tag) => tag.trim());
  process.stdin.resume();
  process.stdin.setEncoding("utf8");
  const inp = new ll.LineReadStream(process.stdin);
  inp.on("line", onLine(process, givenTags, onInputFunc));
};

const changeTags = (changeFileFunc) =>
  handleInput(changeTagsOnInput(changeFileFunc));

const filterTags = () => handleInput(filterOnInput);

module.exports = { changeTags, filterTags };