Simple Chat Room in NodeJS, expressJS and mongoDB in Docker Swarm
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4 years ago
'use strict';
const isDefiningProjection = require('./isDefiningProjection');
/*!
* Determines if `path` is excluded by `projection`
*
* @param {Object} projection
* @param {string} path
* @return {Boolean}
*/
module.exports = function isPathExcluded(projection, path) {
if (path === '_id') {
return projection._id === 0;
}
const paths = Object.keys(projection);
let type = null;
for (const _path of paths) {
if (isDefiningProjection(projection[_path])) {
type = projection[path] === 1 ? 'inclusive' : 'exclusive';
break;
}
}
if (type === 'inclusive') {
return projection[path] !== 1;
}
if (type === 'exclusive') {
return projection[path] === 0;
}
return false;
};