From 9b6c569fe8febf4df08a6402a07f1e43f5f453b1 Mon Sep 17 00:00:00 2001
From: Determinant <tederminant@gmail.com>
Date: Mon, 9 Sep 2024 00:33:59 -0700
Subject: init

---
 app.mjs | 105 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 105 insertions(+)
 create mode 100755 app.mjs

(limited to 'app.mjs')

diff --git a/app.mjs b/app.mjs
new file mode 100755
index 0000000..77fa213
--- /dev/null
+++ b/app.mjs
@@ -0,0 +1,105 @@
+#!/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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