feat(euler): add problem generator

-

challenges/euler/constants.js

@@ -0,0 +1,6 @@
+const path = require('path');
+
+module.exports = {
+    resources: path.join(__dirname, 'resources'),
+    src: path.join(__dirname, 'src')
+};

challenges/euler/constants.ts

@@ -1,3 +0,0 @@
-import path from 'path';
-
-export const resources = path.join(__dirname, 'resources');

challenges/euler/package.json

@@ -2,13 +2,16 @@
     "name": "project-euler",
     "scripts": {
         "build": "gulp build",
-        "start": "node run.js"
+        "start": "node scripts/run",
+        "new": "node scripts/generate"
     },
     "devDependencies": {
         "@swc/core": "^1.2.125",
         "@swc/helpers": "^0.3.2",
         "@types/node": "^16.11.6",
+        "axios": "^0.24.0",
         "chalk": "^4.1.2",
+        "cheerio": "^1.0.0-rc.10",
         "execution-time": "^1.4.1",
         "regenerator-runtime": "^0.13.9",
         "ts-node": "^10.4.0",

challenges/euler/pnpm-lock.yaml

@@ -4,7 +4,9 @@ specifiers:
     '@swc/core': ^1.2.125
     '@swc/helpers': ^0.3.2
     '@types/node': ^16.11.6
+    axios: ^0.24.0
     chalk: ^4.1.2
+    cheerio: ^1.0.0-rc.10
     execution-time: ^1.4.1
     regenerator-runtime: ^0.13.9
     ts-node: ^10.4.0
@@ -14,7 +16,9 @@ devDependencies:
     '@swc/core': 1.2.125
     '@swc/helpers': 0.3.2
     '@types/node': 16.11.6
+    axios: 0.24.0
     chalk: 4.1.2
+    cheerio: 1.0.0-rc.10
     execution-time: 1.4.1
     regenerator-runtime: 0.13.9
     ts-node: 10.4.0_626351e049b80b142acb2ce48a7f5656
@@ -311,6 +315,21 @@ packages:
             }
         dev: true
 
+    /axios/0.24.0:
+        resolution:
+            {
+                integrity: sha512-Q6cWsys88HoPgAaFAVUb0WpPk0O8iTeisR9IMqy9G8AbO4NlpVknrnQS03zzF9PGAWgO3cgletO3VjV/P7VztA==
+            }
+        dependencies:
+            follow-redirects: 1.14.6
+        transitivePeerDependencies:
+            - debug
+        dev: true
+
+    /boolbase/1.0.0:
+        resolution: { integrity: sha1-aN/1++YMUes3cl6p4+0xDcwed24= }
+        dev: true
+
     /chalk/4.1.2:
         resolution:
             {
@@ -322,6 +341,35 @@ packages:
             supports-color: 7.2.0
         dev: true
 
+    /cheerio-select/1.5.0:
+        resolution:
+            {
+                integrity: sha512-qocaHPv5ypefh6YNxvnbABM07KMxExbtbfuJoIie3iZXX1ERwYmJcIiRrr9H05ucQP1k28dav8rpdDgjQd8drg==
+            }
+        dependencies:
+            css-select: 4.2.1
+            css-what: 5.1.0
+            domelementtype: 2.2.0
+            domhandler: 4.3.0
+            domutils: 2.8.0
+        dev: true
+
+    /cheerio/1.0.0-rc.10:
+        resolution:
+            {
+                integrity: sha512-g0J0q/O6mW8z5zxQ3A8E8J1hUgp4SMOvEoW/x84OwyHKe/Zccz83PVT4y5Crcr530FV6NgmKI1qvGTKVl9XXVw==
+            }
+        engines: { node: '>= 6' }
+        dependencies:
+            cheerio-select: 1.5.0
+            dom-serializer: 1.3.2
+            domhandler: 4.3.0
+            htmlparser2: 6.1.0
+            parse5: 6.0.1
+            parse5-htmlparser2-tree-adapter: 6.0.1
+            tslib: 2.3.1
+        dev: true
+
     /color-convert/2.0.1:
         resolution:
             {
@@ -346,6 +394,27 @@ packages:
             }
         dev: true
 
+    /css-select/4.2.1:
+        resolution:
+            {
+                integrity: sha512-/aUslKhzkTNCQUB2qTX84lVmfia9NyjP3WpDGtj/WxhwBzWBYUV3DgUpurHTme8UTPcPlAD1DJ+b0nN/t50zDQ==
+            }
+        dependencies:
+            boolbase: 1.0.0
+            css-what: 5.1.0
+            domhandler: 4.3.0
+            domutils: 2.8.0
+            nth-check: 2.0.1
+        dev: true
+
+    /css-what/5.1.0:
+        resolution:
+            {
+                integrity: sha512-arSMRWIIFY0hV8pIxZMEfmMI47Wj3R/aWpZDDxWYCPEiOMv6tfOrnpDtgxBYPEQD4V0Y/958+1TdC3iWTFcUPw==
+            }
+        engines: { node: '>= 6' }
+        dev: true
+
     /diff/4.0.2:
         resolution:
             {
@@ -354,6 +423,52 @@ packages:
         engines: { node: '>=0.3.1' }
         dev: true
 
+    /dom-serializer/1.3.2:
+        resolution:
+            {
+                integrity: sha512-5c54Bk5Dw4qAxNOI1pFEizPSjVsx5+bpJKmL2kPn8JhBUq2q09tTCa3mjijun2NfK78NMouDYNMBkOrPZiS+ig==
+            }
+        dependencies:
+            domelementtype: 2.2.0
+            domhandler: 4.3.0
+            entities: 2.2.0
+        dev: true
+
+    /domelementtype/2.2.0:
+        resolution:
+            {
+                integrity: sha512-DtBMo82pv1dFtUmHyr48beiuq792Sxohr+8Hm9zoxklYPfa6n0Z3Byjj2IV7bmr2IyqClnqEQhfgHJJ5QF0R5A==
+            }
+        dev: true
+
+    /domhandler/4.3.0:
+        resolution:
+            {
+                integrity: sha512-fC0aXNQXqKSFTr2wDNZDhsEYjCiYsDWl3D01kwt25hm1YIPyDGHvvi3rw+PLqHAl/m71MaiF7d5zvBr0p5UB2g==
+            }
+        engines: { node: '>= 4' }
+        dependencies:
+            domelementtype: 2.2.0
+        dev: true
+
+    /domutils/2.8.0:
+        resolution:
+            {
+                integrity: sha512-w96Cjofp72M5IIhpjgobBimYEfoPjx1Vx0BSX9P30WBdZW2WIKU0T1Bd0kz2eNZ9ikjKgHbEyKx8BB6H1L3h3A==
+            }
+        dependencies:
+            dom-serializer: 1.3.2
+            domelementtype: 2.2.0
+            domhandler: 4.3.0
+        dev: true
+
+    /entities/2.2.0:
+        resolution:
+            {
+                integrity: sha512-p92if5Nz619I0w+akJrLZH0MX0Pb5DX39XOwQTtXSdQQOaYH03S1uIQp4mhOZtAXrxq4ViO67YTiLBo2638o9A==
+            }
+        dev: true
+
     /execution-time/1.4.1:
         resolution:
             {
@@ -363,6 +478,19 @@ packages:
             pretty-hrtime: 1.0.3
         dev: true
 
+    /follow-redirects/1.14.6:
+        resolution:
+            {
+                integrity: sha512-fhUl5EwSJbbl8AR+uYL2KQDxLkdSjZGR36xy46AO7cOMTrCMON6Sa28FmAnC2tRTDbd/Uuzz3aJBv7EBN7JH8A==
+            }
+        engines: { node: '>=4.0' }
+        peerDependencies:
+            debug: '*'
+        peerDependenciesMeta:
+            debug:
+                optional: true
+        dev: true
+
     /has-flag/4.0.0:
         resolution:
             {
@@ -371,6 +499,18 @@ packages:
         engines: { node: '>=8' }
         dev: true
 
+    /htmlparser2/6.1.0:
+        resolution:
+            {
+                integrity: sha512-gyyPk6rgonLFEDGoeRgQNaEUvdJ4ktTmmUh/h2t7s+M8oPpIPxgNACWa+6ESR57kXstwqPiCut0V8NRpcwgU7A==
+            }
+        dependencies:
+            domelementtype: 2.2.0
+            domhandler: 4.3.0
+            domutils: 2.8.0
+            entities: 2.2.0
+        dev: true
+
     /make-error/1.3.6:
         resolution:
             {
@@ -378,6 +518,31 @@ packages:
             }
         dev: true
 
+    /nth-check/2.0.1:
+        resolution:
+            {
+                integrity: sha512-it1vE95zF6dTT9lBsYbxvqh0Soy4SPowchj0UBGj/V6cTPnXXtQOPUbhZ6CmGzAD/rW22LQK6E96pcdJXk4A4w==
+            }
+        dependencies:
+            boolbase: 1.0.0
+        dev: true
+
+    /parse5-htmlparser2-tree-adapter/6.0.1:
+        resolution:
+            {
+                integrity: sha512-qPuWvbLgvDGilKc5BoicRovlT4MtYT6JfJyBOMDsKoiT+GiuP5qyrPCnR9HcPECIJJmZh5jRndyNThnhhb/vlA==
+            }
+        dependencies:
+            parse5: 6.0.1
+        dev: true
+
+    /parse5/6.0.1:
+        resolution:
+            {
+                integrity: sha512-Ofn/CTFzRGTTxwpNEs9PP93gXShHcTq255nzRYSKe8AkVpZY7e1fpmTfOyoIvjP5HG7Z2ZM7VS9PPhQGW2pOpw==
+            }
+        dev: true
+
     /pretty-hrtime/1.0.3:
         resolution: { integrity: sha1-t+PqQkNaTJsnWdmeDyAesZWALuE= }
         engines: { node: '>= 0.8' }
@@ -434,6 +599,13 @@ packages:
             yn: 3.1.1
         dev: true
 
+    /tslib/2.3.1:
+        resolution:
+            {
+                integrity: sha512-77EbyPPpMz+FRFRuAFlWMtmgUWGe9UOG2Z25NqCwiIjRhOf5iKGuzSe5P2w1laq+FkRy4p+PCuVkJSGkzTEKVw==
+            }
+        dev: true
+
     /typescript/4.4.4:
         resolution:
             {

challenges/euler/scripts/generate.js

@@ -0,0 +1,51 @@
+const inquirer = require('inquirer');
+const fs = require('fs');
+const path = require('path');
+const { src } = require('../constants');
+const axios = require('axios');
+const cheerio = require('cheerio');
+
+const problems = fs
+    .readFileSync(path.join(__dirname, '..', 'readme.md'))
+    .toString()
+    .match(/^-   \[.] (?:\[(.*)\]|(.*))/gm)
+    .map(res => {
+        const sanitised = res.substring(8).replace('[', '').replace(']', '');
+        return sanitised.match(/[0-9]* - (.*)/)[1];
+    });
+
+inquirer
+    .prompt([
+        {
+            name: 'problemNumber',
+            message: 'Which problem would you like to solve?',
+            type: 'number',
+            validate: input =>
+                parseInt(input) > 100
+                    ? 'Please make sure you choose a number between 1 and 100!'
+                    : true
+        }
+    ])
+    .then(async ({ problemNumber }) => {
+        const problemName = problems[problemNumber - 1];
+
+        // Fetch the problem data off of projecteuler.net
+        axios.get(`https://projecteuler.net/problem=${problemNumber}`).then(({ data }) => {
+            const $ = cheerio.load(data);
+            const problemContent = $('.problem_content')
+                .text()
+                .trim()
+                .split('\n')
+                .map(r => `// ${r}`)
+                .join('\n');
+
+            fs.writeFileSync(
+                path.join(src, `${problemNumber} - ${problemName}.ts`),
+                `${problemContent}
+export = {};
+
+// Output
+console.log();`
+            );
+        });
+    });

challenges/euler/src/67 - Maximum path sum II.ts

@@ -8,7 +8,7 @@
 
 import fs from 'fs';
 import path from 'path';
-import { resources } from '../constants';
+import { resources } from '../constants.js';
 export {};
 
 // Same method as 18 - Maximum path sum I

challenges/euler/tsconfig.json

@@ -3,7 +3,8 @@
         "target": "es5",
         "module": "commonjs",
         "outDir": "build",
-        "esModuleInterop": true
+        "esModuleInterop": true,
+        "allowJs": true
     },
     "include": ["src/**/*.ts"],
     "ts-node": {