{
  "title": "Factorio Campaign description.json",
  "$schema": "https://json-schema.org/draft-07/schema#",
  "oneOf": [
    {
      "allOf":[
        {
          "$ref": "scenario.json"
        },
        {
          "type":"object",
          "required":[
            "starting-level"
          ],
          "properties": {
            "starting-level":{
              "type": "string"
            },
            "dependencies":{
              "type":"array",
              "description": "List of campaigns that must be completed before this one",
              "items": {
                "type":"string"
              }
            },
            "difficulties":{
              "type":"array",
              "description": "List of difficulties this campaign supports",
              "items": {
                "enum": ["easy","normal","hard"]
              },
              "default": ["normal"]
            }
          }
        }
      ]
    },
    {
      "type":"null"
    }
  ]
}