selectPopulatedFields.js
1.18 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
'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];
}
}
} else if (isExclusive(fields)) {
for (const path of paths) {
if (userProvidedFields[path] == null) {
delete fields[path];
}
}
}
};
/*!
* 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;
}