How can I add friend's friends to my friend list?

Working with Data
1

I have a aggregate statement that returns following result. I want to change this result-1 to result-2. How can I make do it? Please teach me that pipeline.
result-1

[
    {
        _id: "sdfsdfasdasdfasdf",
        name: "Robot James"
        friends: [
  
        ]
    }    
    {
        _id: "sdfsdfasdasdfasdf",
        name: "John Wu"
        friends: [
            {
                id: "asdfasdfasdfaadsf",
                name: "John Wu-1"
                friends: [
                    {
                        id: "asdfasdfasdfaadsf",
                        name: "John Wu-1-1"
                        friends: [
                            
                        ]
                    },
                    {
                        id: "asdfasdfasdfaadsf",
                        name: "John Wu-1-2"
                        friends: [
                            
                        ]
                    }                                  
                ]
            }
        ]
    }
]

Here, Robot James and John Wu are my friends, Robot James hasn’t any friends, but John wu has friends.
If my friends has their friends, I want to add their friends to my friends list, but instead of him, like following,.

[
    {
        _id: "sdfsdfasdasdfasdf",
        name: "Robot James"
        friends: [
  
        ]
    }    
    {
        id: "asdfasdfasdfaadsf",
        name: "John Wu-1"
        friends: [
            {
                id: "asdfasdfasdfaadsf",
                name: "John Wu-1-1"
                friends: [
                    
                ]
            },
            {
                id: "asdfasdfasdfaadsf",
                name: "John Wu-1-2"
                friends: [
                    
                ]
            }                                  
        ]
    }
]
2

Hi @bill_oneil ,

Welcome to MongoDB community.

In order to provide a pipeline we need to see some base documents example and not just a pipeline result. Additionally please provide the query that creates this result.

I believe you will need a $graphLookup to support this but need more info to really help.

Thanks
Pav