127 lines
3.5 KiB
TypeScript
Executable File
127 lines
3.5 KiB
TypeScript
Executable File
#!/usr/bin/env -S deno run --unstable --allow-env --allow-read --allow-write --allow-net
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import { createHash } from "https://deno.land/std@0.165.0/node/crypto.ts";
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import { homedir } from "https://deno.land/std@0.165.0/node/os.ts";
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import { join } from "https://deno.land/std@0.165.0/path/mod.ts";
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import {
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readFileSync,
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mkdirSync,
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statSync,
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writeFileSync,
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existsSync,
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} from "https://deno.land/std@0.165.0/node/fs.ts";
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import openingHours from "npm:opening_hours@^3.8.0";
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import yargs from "https://deno.land/x/yargs/deno.ts";
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import { Arguments } from "https://deno.land/x/yargs/deno-types.ts";
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const CACHE_AGE = 12 * 60 * 60 * 1000;
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interface OsmNode {
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lat: number;
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lon: number;
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tags: { [tag: string]: string };
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}
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const md5 = (text: string) => createHash("md5").update(text).digest("hex");
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const getCachePath = (query: string) => {
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const cacheDirectory =
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Deno.env.get("CACHE_DIR") ||
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join(homedir() || ".", ".cache", "osm-restaurants");
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if (!existsSync(cacheDirectory)) mkdirSync(cacheDirectory);
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return join(cacheDirectory, md5(query) + ".json");
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};
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const randomElement = (array: any[]): any =>
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array[Math.floor(array.length * Math.random())];
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const argv = yargs(Deno.args)
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.option("checkOpen", {
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alias: "o",
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default: true,
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type: "boolean",
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description: "Only show restaurants that are open",
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})
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.option("radius", {
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alias: "r",
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description: "Radius around the location (metres)",
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type: "number",
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default: 500,
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})
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.option("latitude", {
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description: "The latitude coordinates to search around",
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type: "number",
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demandOption: true,
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})
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.option("longitude", {
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description: "The latitude coordinates to search around",
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type: "number",
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demandOption: true,
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})
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.option("endpoint", {
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description: "The Overpass API endpoint",
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type: "string",
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default: "http://overpass-api.de/api/interpreter",
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})
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.option("country", {
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description: "The country you are in (two letter code)",
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type: "string",
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default: "de",
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})
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.help()
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.alias("help", "h").argv;
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const overpassQuery = `
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[out:json];
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(
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node(around:${argv.radius},${argv.latitude},${argv.longitude})[amenity=fast_food];
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node(around:${argv.radius},${argv.latitude},${argv.longitude})[amenity=restaurant];
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);
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out;
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`;
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const restaurantOpen = (restaurant: OsmNode) =>
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"opening_hours" in restaurant.tags
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? new openingHours(restaurant.tags.opening_hours, {
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lat: restaurant.lat,
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lon: restaurant.lon,
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address: {
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country_code:
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"addr:country" in restaurant.tags
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? restaurant.tags["addr:country"].toLowerCase()
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: argv.country,
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},
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}).getState()
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: true;
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const withRestaurants = (callback: (restaurants: OsmNode[]) => any) => {
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const cachePath = getCachePath(overpassQuery);
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if (
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existsSync(cachePath) &&
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+new Date() - statSync(cachePath).mtime < CACHE_AGE
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)
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callback(JSON.parse(readFileSync(cachePath)));
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else {
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console.log("fetching");
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return fetch(argv.endpoint, {
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method: "POST",
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body: overpassQuery,
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})
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.then((response) => response.json())
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.then((responseJson) => {
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const restaurants = responseJson.elements;
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writeFileSync(cachePath, JSON.stringify(restaurants));
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callback(restaurants);
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})
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.catch(console.error);
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}
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};
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withRestaurants((restaurants) => {
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const randomOpenRestaurant = randomElement(
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argv.checkOpen ? restaurants.filter(restaurantOpen) : restaurants
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);
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console.log(JSON.stringify(randomOpenRestaurant));
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});
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