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#!/usr/bin/env node
const csUrl = "https://aeronav.faa.gov/upload_313-d/supplements/";
const tppUrl = "https://aeronav.faa.gov/upload_313-d/terminal/";
import { JSDOM } from "jsdom";
import moment from "moment";
import fs from "node:fs/promises";
const csRegions = ["SW"];
const tppRegions = ["SW1", "SW2", "SW3", "SW4"];
const getChartSupplementDiretory = async () => {
const dom = await JSDOM.fromURL(csUrl, {});
let chd = dom.window.document.querySelector("pre").children;
const files = {};
for (let i = 0; i < csRegions.length; i++) {
files[csRegions[i]] = [];
}
const pattern = /CS_([A-Z]+)_([0-9]{8}).pdf/;
for (let i = 0; i < chd.length; i++) {
if (chd[i] instanceof dom.window.HTMLAnchorElement) {
const file = chd[i].textContent;
const m = file.match(pattern);
if (m) {
const region = m[1];
const date = moment(m[2], "YYYYMMDD");
const url = `${csUrl}${file}`;
if (files[region]) {
files[region].push({ url, date });
if (moment() >= date) {
files[region].current = { url, date: m[2] };
}
}
}
}
}
return files;
};
const getTerminalProcedurePublication = async () => {
const dom = await JSDOM.fromURL(tppUrl, {});
let chd = dom.window.document.querySelector("pre").children;
const files = {};
for (let i = 0; i < tppRegions.length; i++) {
files[tppRegions[i]] = [];
}
const pattern = /([0-9]{4}-[0-9]{2}-[0-9]{2})/;
for (let i = 0; i < chd.length; i++) {
if (chd[i] instanceof dom.window.HTMLAnchorElement) {
const folder = chd[i].textContent;
const m = folder.match(pattern);
if (m) {
const dom = await JSDOM.fromURL(`${tppUrl}${m[1]}`, {});
const date = moment(m[1], "YYYY-MM-DD");
const items = dom.window.document.querySelector("pre").children;
const pattern = /([A-Z1-9]+).pdf/;
if (moment() >= date) {
for (let j = 0; j < items.length; j++) {
const file = items[j].textContent;
const m = file.match(pattern);
const url = `${tppUrl}/${folder}/${file}`;
if (m) {
const region = m[1];
if (files[region]) {
files[region].push({ url, date });
files[region].current = {
url,
date: date.format("YYYYMMDD"),
};
}
}
}
} else {
console.log(`skipped ${folder}: in the future`);
}
}
}
}
return files;
};
const res = [
{ prefix: "cs", files: await getChartSupplementDiretory() },
{ prefix: "tpp", files: await getTerminalProcedurePublication() },
];
for (let r of res) {
for (let region of Object.keys(r.files)) {
const cur = r.files[region].current;
const file = `${r.prefix}-${region}-${cur.date}.pdf`;
const fileExists = (path) =>
fs.stat(path).then(
() => true,
() => false,
);
if (await fileExists(file)) {
console.log(`file "${file}" already exists`);
} else {
console.log(`downloading "${file}"`);
await fetch(cur.url)
.then((r) => r.arrayBuffer())
.then((bytes) => fs.writeFile(file, new Uint8Array(bytes)));
}
}
}
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