joannangx/visionaria_app

'use strict';
var path = require('path');
var fs = require('graceful-fs');
var osenv = require('osenv');
var assign = require('object-assign');
var mkdirp = require('mkdirp');
var uuid = require('uuid');
var xdgBasedir = require('xdg-basedir');
var osTmpdir = require('os-tmpdir');
var writeFileAtomic = require('write-file-atomic');
var dotProp = require('dot-prop');

var user = (osenv.user() || uuid.v4()).replace(/\\/g, '');
var configDir = xdgBasedir.config || path.join(osTmpdir(), user, '.config');
var permissionError = 'You don\'t have access to this file.';
var defaultPathMode = parseInt('0700', 8);
var writeFileOptions = {mode: parseInt('0600', 8)};

function Configstore(id, defaults, opts) {
    opts = opts || {};

    var pathPrefix = opts.globalConfigPath ?
        path.join(id, 'config.json') :
        path.join('configstore', id + '.json');

    this.path = path.join(configDir, pathPrefix);

    this.all = assign({}, defaults || {}, this.all || {});
}

Configstore.prototype = Object.create(Object.prototype, {
    all: {
        get: function () {
            try {
                return JSON.parse(fs.readFileSync(this.path, 'utf8'));
            } catch (err) {
                // create dir if it doesn't exist
                if (err.code === 'ENOENT') {
                    mkdirp.sync(path.dirname(this.path), defaultPathMode);
                    return {};
                }

                // improve the message of permission errors
                if (err.code === 'EACCES') {
                    err.message = err.message + '\n' + permissionError + '\n';
                }

                // empty the file if it encounters invalid JSON
                if (err.name === 'SyntaxError') {
                    writeFileAtomic.sync(this.path, '', writeFileOptions);
                    return {};
                }

                throw err;
            }
        },
        set: function (val) {
            try {
                // make sure the folder exists as it
                // could have been deleted in the meantime
                mkdirp.sync(path.dirname(this.path), defaultPathMode);

                writeFileAtomic.sync(this.path, JSON.stringify(val, null, '\t'), writeFileOptions);
            } catch (err) {
                // improve the message of permission errors
                if (err.code === 'EACCES') {
                    err.message = err.message + '\n' + permissionError + '\n';
                }

                throw err;
            }
        }
    },
    size: {
        get: function () {
            return Object.keys(this.all || {}).length;
        }
    }
});

Configstore.prototype.get = function (key) {
    return dotProp.get(this.all, key);
};

Configstore.prototype.set = function (key, val) {
    var config = this.all;
    if (arguments.length === 1) {
        Object.keys(key).forEach(function (k) {
            dotProp.set(config, k, key[k]);
        });
    } else {
        dotProp.set(config, key, val);
    }
    this.all = config;
};

Configstore.prototype.has = function (key) {
    return dotProp.has(this.all, key);
};

Configstore.prototype.delete = Configstore.prototype.del = function (key) {
    var config = this.all;
    dotProp.delete(config, key);
    this.all = config;
};

Configstore.prototype.clear = function () {
    this.all = {};
};

module.exports = Configstore;