kruk/src/crux-output.js

Command Line Tool for CrUX Rest API

import { green, red, yellow, bold } from "./utils/format.js";
import { table } from "table";

function drawDistribution(histogram) {
  function colorize(index, value) {
    if (index === 0) {
      return green(value);
    }

    if (index === 1) {
      return yellow(value);
    }

    if (index === 2) {
      return red(value);
    }
  }

  function draw(value) {
    let line = "";
    for (let i = 0; i < value; i++) {
      line += "\u25AA";
    }

    return line;
  }

  const distributionLine = histogram
    .map((value, index) => {
      return colorize(index, draw(Math.round(value)));
    })
    .join("")
    .padEnd(128, "\u25AA");
  const distributionValue = histogram
    .map((value, index) => colorize(index, (value + "").padStart(5)))
    .join(" ");

  return distributionLine + " " + distributionValue + "\n";
}

function colorizeValue(value, rank, pad = 0) {
  const v = (value + "").padEnd(pad);

  if (rank === "poor") {
    return red(v);
  } else if (rank === "average") {
    return yellow(v);
  } else {
    return green(v);
  }
}

function printTable(data) {
  const headings = Object.keys(data[0]).filter(
    (item) => item !== "minimalGood",
  );
  const values = data.map((item) =>
    Object.entries(item)
      .filter((entry) => entry[0] !== "minimalGood")
      .map((entry) => {
        const it = entry[1];

        return typeof it === "object" ? colorizeValue(it.p75, it.rank) : it;
      }),
  );
  const tableData = [headings].concat(values);
  const output = table(tableData);

  console.log(output);
}

function printDistribution(data) {
  const headings = Object.keys(data[0]);
  const values = data
    .map((item) =>
      Object.entries(item)
        .map((entry, i) => {
          const [key, it] = entry;

          if (key === "minimalGood") return;

          if (typeof it === "object") {
            return (
              bold(headings[i].padStart(4)) +
              "" +
              colorizeValue(it.p75, it.rank, 6) +
              drawDistribution(it.histogram)
            );
          } else {
            return "\n" + bold(it) + "\n";
          }
        })
        .join(""),
    )
    .join("");

  console.log(values);
}

function printCSV(data) {
  const titleRow = ["url", "metric", "p75", "good", "average", "poor"].join(
    ";",
  );
  const headings = Object.keys(data[0]);
  const values = data
    .map((item) => {
      const url = item.url;

      return Object.values(item)
        .map((it, i) => {
          if (typeof it === "object") {
            return [url, headings[i], it.p75, it.histogram.join(";")].join(";");
          }
        })
        .join("\n");
    })
    .join("\n");

  console.log(titleRow + values);
}

//output

function printHeading(params) {
  const heading = `\u001b[32m\nChrome UX Report \u001b[0m ${JSON.stringify(
    params,
  )}`;

  console.log(heading);
}

export { printTable, printDistribution, printCSV, printHeading };