Write this as one method

put that in common method and call it with different parameter.. like

public function albumArt($request, $s3)
    {
        $albumArtName = md5($request->albumArtName . microtime()) . '.jpg';
        $albumArt = Image::make(base64_decode(preg_replace('#^data:image/\w+;base64,#i', '', $request->albumArtImage)))->stream();
        $albumArtPath = 'albumarts/' . $albumArtName;
        $s3->put($albumArtPath, (string)$albumArt, 'public');
        return $albumArtPath;
    }

public function uploadAlbumArt(StoreMessageRequest $request, $s3)
    {
        $this->albumArt( $request, $s3);
    }

public function updateAlbumArt(StoreMessageRequest $request, $s3)
    {
        $this->albumArt( $request, $s3);
    }

Can you have one class called MessageRequest that would handle both store and update functionalities?

To expand on @arthurvillar's answer, you can check the request method in your request class if you need to conditionally add rules depending on whether it's a POST or PATCH request.

    public function rules()
    {
        $rules = [
            'first_name' => 'required|max:255',
            'last_name' => 'required|max:255',
        ];

        if ($this->isMethod('POST')) {
            $rules['referral'] = 'required';
        }

        if ($this->isMethod('PATCH')) {
            $rules['field'] = 'required';
        }

        return $rules;
    }

Not sure if this is a good practice or not but I've found it useful in a few cases.

It will be really cool if I could have it as just one Form request class but that Form Request class would become messy. Because each of those Form request classes are already adding extra parameters to the request based on if else conditions...

I think I'm gonna go with @biishmar's reply... Thanks guys

@arthurvillar I would really love to see that implementation

Edit

This is what I ended up writing.

    /**
     * @param $request
     * @param $s3
     * @return string
     */
    public function uploadAlbumArt($request, $s3)
    {
        $albumArtName = md5($request->albumArtName . microtime()) . '.jpg';
        $albumArt = Image::make(base64_decode(preg_replace('#^data:image/\w+;base64,#i', '', $request->albumArtImage)))->stream();
        $albumArtPath = 'albumarts/' . $albumArtName;
        $s3->put($albumArtPath, (string)$albumArt, 'public');
        return $albumArtPath;
    }