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server.js
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server.js
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const bodyParser = require('body-parser');
const express = require('express');
const fs = require('fs');
const STATUS_USER_ERROR = 422;
const server = express();
// to enable parsing of json bodies for post requests
server.use(bodyParser.json());
/* Returns a list of dictionary words from the words.txt file. */
const readWords = () => {
const contents = fs.readFileSync('words.txt', 'utf8');
return contents.split('\n');
};
const words = readWords();
const index = Math.floor(Math.random() * words.length);
const word = words[index];
const guesses = {};
server.get('/', (req, res) => {
const wordSoFar = word.split('')
.map((letter) => {
if (guesses[letter]) {
return letter;
}
return '-';
})
.join('');
res.json({ wordSoFar, guesses });
});
server.post('/guess', (req, res) => {
const letter = req.body.letter;
if (!letter) {
res.status(STATUS_USER_ERROR);
res.json({ error: 'Must provide a letter' });
return;
}
if (letter.length !== 1) {
res.status(STATUS_USER_ERROR);
res.json({ error: 'Must guess a single letter' });
return;
}
if (guesses[letter]) {
res.status(STATUS_USER_ERROR);
res.json({ error: `You've already guessed ${letter}!` });
return;
}
guesses[letter] = true;
res.json({ guesses });
});
server.listen(8080);