SDEQ321A-NodeJs-AWS-DesignDoc-MahabubElahi

index.js

// Author      : Mahabub Elahi
// Email       : shojibmahabub630@gmail.com
// Description : A function that will accept the list of folders and will return another list that contains the number of descendent folders each folder has.
// Run         : node index.js

getSummary(Folder);

// @param Folder
// @return Array
function getSummary(Folder)
{
    let summary = []
    Folder.forEach(element =>
    {
        let current_id = element.Id
        let filter = Folder.filter(e => e.Id !== element.Id && e.ParentId === element.Id)
        summary.push({'Id': current_id, 'Count': filter.length})
    });
    return summary;
}


// folder array
const Folder = [
    {
        'Id': '0',
        'Name': 'root',
        'ParentId': '0'
    },
    {
        'Id': '1',
        'Name': 'apache2',
        'ParentId': '7'
    },
    {
        'Id': '2',
        'Name': 'site-available',
        'ParentId': '1'
    },
    {
        'Id': '3',
        'Name': 'sites-enabled',
        'ParentId': '1'
    },
    {
        'Id': '4',
        'Name': 'ports.conf',
        'ParentId': '1'
    },
    {
        'Id': '5',
        'Name': 'google-drive-service.conf',
        'ParentId': '2'
    },
    {
        'Id': '6',
        'Name': 'drop-box-service.conf',
        'ParentId': '3'
    },
    {
        'Id': '7',
        'Name': 'etc',
        'ParentId': '0'
    },
    {
        'Id': '8',
        'Name': 'var',
        'ParentId': '0'
    },
]

Output:
[
{ Id: '0', Count: 2 },
{ Id: '1', Count: 3 },
{ Id: '2', Count: 1 },
{ Id: '3', Count: 1 },
{ Id: '4', Count: 0 },
{ Id: '5', Count: 0 },
{ Id: '6', Count: 0 },
{ Id: '7', Count: 1 },
{ Id: '8', Count: 0 }
]