{
    "type": "object",
    "required": ["results"],
    "properties": {
        "results": {
            "type": "array",
            "minItems": 1,
            "items": {
                "type": "object",
                "$ref": "#/definitions/genericComponent"
            }
        }
    },
    "definitions": {
        "genericComponent": {
            "type": "object",
            "$id": "#/definitions/genericComponent",
            "required":[
                "class",
                "children"
            ],
            "properties":{
                "class":{
                    "type": "string"
                },
                "children":{
                    "type": "array",
                    "items": {
                        "type": "object",
                        "anyOf":[
                            {"$ref":"#/definitions/genericComponent"},
                            {"$ref":"#/definitions/button"}
                        ]
                    }
                }
            }
        },
        "button": {
            "type": "object",
            "$id": "#/definitions/button",
            "required":[
                "class",
                "children"
            ],
            "properties":{
                "class":{
                    "type": "string",
                    "pattern": "(button)"
                },
                "children":{
                    "type": "array",
                    "items": {
                        "type": "object",
                        "anyOf":[
                            {"$ref":"#/definitions/genericComponent"},
                            {"$ref":"#/definitions/button"}
                        ]
                        "minItems": 1
                    }
                }
            }
        }
    }
}

{
    "type": "object",
    "required": ["results"],
    "properties": {
        "results": {
            "type": "array",
            "minItems": 1,
            "items": {
                "type": "object",
                "$ref": "#/definitions/genericComponent"
            }
        }
    },
    "definitions": {
        "genericComponent": {
            "type": "object",
            "$id": "#/definitions/genericComponent",
            "required":[
                "class",
                "children"
            ],
            "properties":{
                "class":{
                    "type": "string"
                },
                "children":{
                    "type": "array",
                    "items": {
                        "type": "object",
                        "anyOf":[
                            {"$ref":"#/definitions/genericComponent"},
                            {"$ref":"#/definitions/button"}
                        ]
                    }
                }
            },
            "if": {
                "properties": {"class": {"pattern": "^button-rect$"}}
            },
            "then": {
                "properties": {
                    "children":{
                        "type": "array",
                        "items": {
                            "type": "object",
                            "$ref": "#/definitions/genericComponent"
                         },
                         "minItems": 1,
                    }
                }
            },
            "else": {
                "properties": {
                    "children":{
                        "type": "array",
                        "items": {
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                            "$ref": "#/definitions/genericComponent"
                        }
                    }
                }
            }
        }
    }
}