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モジュール間で値を共有しよう.js

var get = exports.get = function(name, key, fs, path){
	
	fs = fs ? fs : require('fs');
	path = path ? path : require('path');
	
	var file = path.resolve(__dirname, name + '.json')

	if(!fs.existsSync(file)){
		console.error('File', file,'does not exist.');
		return null;
	}

	var json = fs.readFileSync(file, 'utf8');
	var data;

	try{
		data = JSON.parse(json);
	}catch(err){
		console.error('Failed to parse', file, ':', err.message);
		return null;
	}

	return data[key] || null;

};

var set = exports.set = function(name, key, value, fs, path){

	fs = fs ? fs : require('fs');
	path = path ? path : require('path');
	
	var file = path.resolve(__dirname, name + '.json')

	if(!fs.existsSync(file)){
		console.error('File', file,'does not exist.');
		return null;
	}

	var json = fs.readFileSync(file, 'utf8');
	var data;

	try{
		data = JSON.parse(json);
	}catch(err){
		console.error('Failed to parse', file, ':', err.message);
		return null;
	}

	data[key] = value;
	var newJson;

	try{
		newJson = JSON.stringify(data, null, '\t');
	}catch(err){
		console.error('Failed to stringify data.', err.message);
		return null;
	}

	try{
		fs.writeFileSync(file, newJson, 'utf8');
	}catch(err){
		console.error('Failed to write JSON to', file, '. :', err.message);
		return null;
	}

	return value;

};