selectPopulatedFields.js•1.68 kB
'use strict';
const isExclusive = require('../projection/isExclusive');
const isInclusive = require('../projection/isInclusive');
/*!
* ignore
*/
module.exports = function selectPopulatedFields(fields, userProvidedFields, populateOptions) {
if (populateOptions == null) {
return;
}
const paths = Object.keys(populateOptions);
userProvidedFields = userProvidedFields || {};
if (isInclusive(fields)) {
for (const path of paths) {
if (!isPathInFields(userProvidedFields, path)) {
fields[path] = 1;
} else if (userProvidedFields[path] === 0) {
delete fields[path];
}
const refPath = populateOptions[path]?.refPath;
if (typeof refPath === 'string') {
if (!isPathInFields(userProvidedFields, refPath)) {
fields[refPath] = 1;
} else if (userProvidedFields[refPath] === 0) {
delete fields[refPath];
}
}
}
} else if (isExclusive(fields)) {
for (const path of paths) {
if (userProvidedFields[path] == null) {
delete fields[path];
}
const refPath = populateOptions[path]?.refPath;
if (typeof refPath === 'string' && userProvidedFields[refPath] == null) {
delete fields[refPath];
}
}
}
};
/*!
* ignore
*/
function isPathInFields(userProvidedFields, path) {
const pieces = path.split('.');
const len = pieces.length;
let cur = pieces[0];
for (let i = 1; i < len; ++i) {
if (userProvidedFields[cur] != null || userProvidedFields[cur + '.$'] != null) {
return true;
}
cur += '.' + pieces[i];
}
return userProvidedFields[cur] != null || userProvidedFields[cur + '.$'] != null;
}