node-gamedig/lib/GameResolver.js

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const Path = require('path'),
fs = require('fs');
class GameResolver {
constructor() {
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const loaded = this._readGames();
this.gamesByKey = loaded.gamesByKey;
this.games = loaded.games;
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}
lookup(type) {
if(!type) throw Error('No game specified');
if(type.substr(0,9) === 'protocol-') {
return {
protocol: type.substr(9)
};
}
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const game = this.gamesByKey.get(type);
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if(!game) throw Error('Invalid game: '+type);
return game.options;
}
printReadme() {
let out = '';
out += '| GameDig Type ID | Name | Notes\n';
out += '|---|---|---\n';
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const sorted = this.games
.filter(game => game.pretty)
.sort((a,b) => {
return a.pretty.localeCompare(b.pretty);
});
for(const game of sorted) {
let keysOut = game.keys.map(key => '`'+key+'`').join('<br>');
out += "| " + keysOut.padEnd(10, " ") + " "
+ "| " + game.pretty;
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if(game.extra.doc_notes)
out += " | [Notes](#"+game.extra.doc_notes+")";
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out += "\n";
}
return out;
}
_readGames() {
const gamesFile = Path.normalize(__dirname+'/../games.txt');
const lines = fs.readFileSync(gamesFile,'utf8').split('\n');
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const gamesByKey = new Map();
const games = [];
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for (let line of lines) {
// strip comments
const comment = line.indexOf('#');
if(comment !== -1) line = line.substr(0,comment);
line = line.trim();
if(!line) continue;
const split = line.split('|');
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const keys = split[0].trim().split(',');
const name = split[1].trim();
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const options = this._parseList(split[3]);
options.protocol = split[2].trim();
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const extra = this._parseList(split[4]);
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const game = {
keys: keys,
pretty: name,
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options: options,
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extra: extra
};
for (const key of keys) {
gamesByKey.set(key, game);
}
games.push(game);
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}
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return { gamesByKey, games };
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}
_parseList(str) {
if(!str) return {};
const out = {};
for (const one of str.split(',')) {
const equals = one.indexOf('=');
const key = equals === -1 ? one : one.substr(0,equals);
/** @type {string|number|boolean} */
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let value = equals === -1 ? '' : one.substr(equals+1);
if(value === 'true' || value === '') value = true;
else if(value === 'false') value = false;
else if(!isNaN(parseInt(value))) value = parseInt(value);
out[key] = value;
}
return out;
}
}
module.exports = GameResolver;