news/utils/build.js

import { join } from "https://deno.land/std@0.208.0/path/mod.ts";
import { emptyDir } from "https://deno.land/std@0.196.0/fs/empty_dir.ts";
import { addDays, format, nextMonday, setWeek } from "npm:date-fns";
import { marked } from "npm:marked";
import matter from "npm:front-matter";

const SRC_DIR = "./data";
const DEST_DIR = "./dist";

async function build() {
  let issues = [];
  for await (const dirEntry of Deno.readDir(SRC_DIR)) {
    if (!dirEntry.isDirectory || !dirEntry.name.match(/^\d{4}$/)) {
      continue;
    }
    //const [fn, ext] = dirEntry.name.split(".");
    const year = dirEntry.name;
    const yearDir = join(SRC_DIR, year);
    console.log(`Processing year: ${year}`);
    for await (const dirEntry of Deno.readDir(yearDir)) {
      const [fn, ext] = dirEntry.name.split(".");
      const weekMatch = fn.match(/^week(\d{2})$/);
      if (!weekMatch || ext !== "md") {
        continue;
      }
      const week = weekMatch[1];
      const mdPath = join(SRC_DIR, year, dirEntry.name);
      const source = await Deno.readTextFile(mdPath);

      const issue = {
        week: `${year}-${week}`,
        period: calcPeriod(year, week),
      };

      await renderData(issue, source);
      issues.push(issue);
    }
  }

  await emptyDir(DEST_DIR);
  const imgDir = join(DEST_DIR, "img");
  await emptyDir(imgDir);

  // get images
  for (const issue of issues) {
    await genImage(
      `https://news.web3privacy.info/image/${issue.week}?${
        new Date().valueOf()
      }`,
      join(imgDir, `${issue.week}.png`),
    );
  }

  // make cover
  await genImage(
    `https://news.web3privacy.info/cover`,
    join(imgDir, "cover.png"),
  );

  const outputFn = join(DEST_DIR, "index.json");
  await writeJSONFile(outputFn, issues);
}

async function renderData(issue, source) {
  const fm = matter(source);

  const parsed = marked.parse(fm.body);
  return Object.assign(issue, fm.attributes, {
    newsMd: fm.body,
    newsHtml: parsed,
  });

  //const fm = matter(issue.source)
  //console.log(fm)
  //console.log(parsed)
  //return
}

function calcPeriod(year, week) {
  const weekStart = setWeek(
    nextMonday(new Date(Number(year), 0, 4)),
    Number(week),
    {
      weekStartsOn: 1,
      firstWeekContainsDate: 4,
    },
  );
  const weekEnd = addDays(weekStart, 6);

  return [weekStart, weekEnd];
}

async function writeJSONFile(fn, data) {
  console.log(`File written: ${fn}`);
  return Deno.writeTextFile(fn, JSON.stringify(data, null, 2));
}

async function genImage(url, fn) {
  const imgResp = await fetch("https://html2svg.gwei.cz", {
    method: "POST",
    body: JSON.stringify({
      url,
      format: "png",
      width: 1920,
      height: 960,
    }),
  });

  if (imgResp.body) {
    const file = await Deno.open(fn, { write: true, create: true });
    await imgResp.body.pipeTo(file.writable);
  }
}

build();