From 4309035aec9ffa194c5163da93c6ba8e6242b887 Mon Sep 17 00:00:00 2001
From: Determinant <tederminant@gmail.com>
Date: Mon, 9 Sep 2024 12:06:42 -0700
Subject: ...

---
 app.mjs | 80 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 76 insertions(+), 4 deletions(-)

(limited to 'app.mjs')

diff --git a/app.mjs b/app.mjs
index 3c81877..12bd171 100755
--- a/app.mjs
+++ b/app.mjs
@@ -2,13 +2,18 @@
 
 const csUrl = "https://aeronav.faa.gov/upload_313-d/supplements/";
 const tppUrl = "https://aeronav.faa.gov/upload_313-d/terminal/";
+const ifrEnrouteUrl = "https://aeronav.faa.gov/enroute/";
 
 import { JSDOM } from "jsdom";
 import moment from "moment";
 import fs from "node:fs/promises";
+import decompress from "decompress";
+import { waitForDebugger } from "node:inspector";
 
 const csRegions = ["SW"];
 const tppRegions = ["SW1", "SW2", "SW3", "SW4"];
+const ifrEnrouteLow = [2, 3, 4];
+const ifrEnrouteHigh = [];
 
 const getChartSupplementDiretory = async () => {
     const dom = await JSDOM.fromURL(csUrl, {});
@@ -29,7 +34,10 @@ const getChartSupplementDiretory = async () => {
                 if (files[region]) {
                     files[region].push({ url, date });
                     if (moment() >= date) {
-                        files[region].current = { url, date: date.format('YYYY-MM-DD') };
+                        files[region].current = {
+                            url,
+                            date: date.format("YYYY-MM-DD"),
+                        };
                     }
                 }
             }
@@ -80,14 +88,69 @@ const getTerminalProcedurePublication = async () => {
     return files;
 };
 
+const getIFREnroute = async () => {
+    const dom = await JSDOM.fromURL(ifrEnrouteUrl, {});
+    let chd = dom.window.document.querySelector("pre").children;
+    const files = {};
+    for (const i of ifrEnrouteLow) {
+        files[`L${i.toFixed(0).padStart(2, "0")}`] = [];
+    }
+    for (const i of ifrEnrouteHigh) {
+        files[`H${i.toFixed(0).padStart(2, "0")}`] = [];
+    }
+
+    const pattern = /([0-9]{2}-[0-9]{2}-[0-9]{4})/;
+    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(`${ifrEnrouteUrl}${m[1]}`, {});
+                const date = moment(m[1], "MM-DD-YYYY");
+                const items = dom.window.document.querySelector("pre").children;
+                const pattern = /ENR_([A-Z0-9]+).zip/;
+                if (moment() >= date) {
+                    for (let j = 0; j < items.length; j++) {
+                        const file = items[j].textContent;
+                        const m = file.match(pattern);
+                        const url = `${ifrEnrouteUrl}/${folder}/${file}`;
+                        if (m) {
+                            const region = m[1];
+                            const unzip = {};
+                            unzip[`ENR_${region}.tif`] = ".tif";
+                            if (files[region]) {
+                                files[region].push({ url, date });
+                                files[region].current = {
+                                    url,
+                                    date: date.format("YYYY-MM-DD"),
+                                    unzip,
+                                };
+                            }
+                        }
+                    }
+                } else {
+                    console.log(`skipped ${folder}: in the future`);
+                }
+            }
+        }
+    }
+    return files;
+};
+
 const res = [
-    { prefix: "cs", files: await getChartSupplementDiretory() },
-    { prefix: "tpp", files: await getTerminalProcedurePublication() },
+    //{ prefix: "cs", files: await getChartSupplementDiretory() },
+    //{ prefix: "tpp", files: await getTerminalProcedurePublication() },
+    { prefix: "ifr-enroute-low", files: await getIFREnroute() },
 ];
+
+//console.log(res);
 for (let r of res) {
     for (let region of Object.keys(r.files)) {
         const cur = r.files[region].current;
-        const file = `${r.prefix}-${region.toLowerCase()}-${cur.date}.pdf`;
+        if (!cur) {
+            continue;
+        }
+        const file = `${r.prefix}-${region.toLowerCase()}-${cur.date}.${cur.unzip ? "zip" : "pdf"}`;
         const fileExists = (path) =>
             fs.stat(path).then(
                 () => true,
@@ -100,6 +163,15 @@ for (let r of res) {
             await fetch(cur.url)
                 .then((r) => r.arrayBuffer())
                 .then((bytes) => fs.writeFile(file, new Uint8Array(bytes)));
+            if (cur.unzip) {
+                await decompress(file, "./", {
+                    filter: (f) => cur.unzip[f.path] != null,
+                    map: (f) => {
+                        f.path = `${r.prefix}-${region.toLowerCase()}-${cur.date}${cur.unzip[f.path]}`;
+                        return f;
+                    },
+                });
+            }
         }
     }
 }
-- 
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