Form validation

I have an challance with a form validation:. This is the situation:

• company offers services
• these services belong to groups of kind of services
• the company has to select a minimal amount of services within each of these group
• the services have a relation with the company (stored in an pivot table)
• each service has an service_parent (parent of the service group)

my question: how can i validate that the user/company has selected

• an certain amount
• service_id's
• within a group of service_id,s (for example 1,2,3,4,5,6,7,8)
• and how to arrange the specific error messages

When i run dd of the request from an update i get the following (only relevant data)

Request {#43 ▼
  #json: null
  #convertedFiles: null
  #userResolver: Closure {#439 ▶}
  #routeResolver: Closure {#433 ▶}
  +attributes: ParameterBag {#45 ▶}
  +request: ParameterBag {#44 ▼
    #parameters: array:26 [▼
      "_method" => "PUT"
      "_token" => "bKZjDRiqSWg"
      "dp_name" => " Test"
       "dp_street" => "Heaat"
      "dp_housenum" => "59"
      "dp_zipcode" => "9 LC"
      "dp_facebook" => ""
      "dp_twitter" => ""
      "csrf-token" => "bKZj53hd9PRiqSWg"
      "services" => array:178 [▼
        3 => array:2 [▼
          "service_check" => "3"
          "service_id" => "3"
        ]
        4 => array:1 [▼
          "service_check" => "4"
        ]
        5 => array:1 [▶]
        6 => array:1 [▶]
        7 => array:2 [▼
          "service_check" => "7"
          "service_id" => "7"
        ]
        8 => array:1 [▶]
        9 => array:1 [▶]
        10 => array:1 [▶]
        11 => array:2 [▶]
        12 => array:1 [▶]
        13 => array:1 [▶]
        14 => array:1 [▶]
        15 => array:2 [▶]
        16 => array:1 [▶]
        17 => array:1 [▶]
        19 => array:1 [▶]
        18 => array:2 [▶]
        20 => array:1 [▶]
        21 => array:1 [▶]
        22 => array:1 [▶]
        23 => array:2 [▶]
        24 => array:1 [▶]
        25 => array:1 [▶]
        28 => array:2 [▶]
        29 => array:1 [▶]
        30 => array:1 [▶]
        31 => array:1 [▶]


```