JSON Schema for validating JSON representations of Kendo filters.

kendo-filter.json

{
    "$schema": "http:\/\/json-schema.org\/draft-04\/schema#",
    "definitions": {
        "filter": {
            "oneOf": [
                {
                    "type": "object",
                    "properties": {
                        "field": {
                            "type": "string",
                            "minLength": 1
                        },
                        "operator": {
                            "enum": [
                                "eq",
                                "neq",
                                "lt",
                                "lte",
                                "gt",
                                "gte",
                                "startswith",
                                "endswith",
                                "contains"
                            ]
                        },
                        "value": {
                            "type": [
                                "string",
                                "number"
                            ]
                        }
                    },
                    "required": [
                        "field",
                        "operator",
                        "value"
                    ],
                    "additionalProperties": false
                },
                {
                    "type": "object",
                    "properties": {
                        "field": {
                            "type": "string",
                            "minLength": 1
                        },
                        "operator": {
                            "enum": [
                                "isnull",
                                "isnotnull",
                                "isempty",
                                "isnotempty"
                            ]
                        }
                    },
                    "required": [
                        "field",
                        "operator"
                    ],
                    "additionalProperties": false
                }
            ]
        },
        "combinator": {
            "type": "object",
            "properties": {
                "logic": {
                    "enum": [
                        "and",
                        "or"
                    ]
                },
                "filters": {
                    "type": "array",
                    "items": {
                        "anyOf": [
                            {
                                "$ref": "#\/definitions\/filter"
                            },
                            {
                                "$ref": "#\/definitions\/combinator"
                            }
                        ]
                    }
                }
            },
            "required": [
                "logic",
                "filters"
            ],
            "additionalProperties": false
        }
    },
    "oneOf": [
        {
            "$ref": "#\/definitions\/filter"
        },
        {
            "$ref": "#\/definitions\/combinator"
        }
    ]
}