var fs = require('fs');
var R = require('ramda');

function readFile(path) {
    return fs.readFileSync(path).toString('utf-8');
}

var getContent = R.memoize(R.compose(JSON.parse, readFile));

var getPermissions = R.compose(R.prop('permissions'), getContent);
var getContentScripts = R.compose(R.prop('content_scripts'), getContent);
var getIcons = R.compose(R.prop('icons'), getContent);

var isValidField = R.compose(Boolean, R.prop('length'), R.match(/^[\w\d:\/\*]+$/));
var isValidList = R.compose(R.reduce(R.and, true), R.map(isValidField));


console.log(isValidList(getPermissions('./manifest.json')));
console.log(isValidList(getIcons('./manifest.json')));