const QueryBuilder = {

}
/**
 * Allowed types and their internal representation
 * 允许的类型及其内部表示
 * @type {object.<string, string>}
 * @readonly
 * @private
 */
QueryBuilder.TYPES = {
    'string': 'string',
    'integer': 'number',
    'double': 'number',
    'number': 'number',
    'date': 'datetime',
    'time': 'datetime',
    'datetime': 'datetime',
    'boolean': 'boolean'
}

/**
 * Allowed inputs
 * 允许的默认控件类型，如果扩展请custom
 * @type {string[]}
 * @readonly
 * @private
 */
QueryBuilder.INPUTS = [
    'text',
    'number',
    'textarea',
    'radio',
    'checkbox',
    'select',
    'date',
    'datetime',
    'custom'
]

/**
 *  操作符
 *  type：类型
 *  nb_inputs：有几个输入
 *  multiple：是否多选
 *  apply_to ：应用
 */
QueryBuilder.OPERATORS = {
    equal: { type: 'equal', nb_inputs: 1, multiple: false, apply_to: ['string', 'number', 'datetime', 'boolean'] },
    not_equal: { type: 'not_equal', nb_inputs: 1, multiple: false, apply_to: ['string', 'number', 'datetime', 'boolean'] },
    in: { type: 'in', nb_inputs: 1, multiple: true, apply_to: ['string', 'number', 'datetime'] },
    not_in: { type: 'not_in', nb_inputs: 1, multiple: true, apply_to: ['string', 'number', 'datetime'] },
    less: { type: 'less', nb_inputs: 1, multiple: false, apply_to: ['number', 'datetime'] },
    less_or_equal: { type: 'less_or_equal', nb_inputs: 1, multiple: false, apply_to: ['number', 'datetime'] },
    greater: { type: 'greater', nb_inputs: 1, multiple: false, apply_to: ['number', 'datetime'] },
    greater_or_equal: { type: 'greater_or_equal', nb_inputs: 1, multiple: false, apply_to: ['number', 'datetime'] },
    between: { type: 'between', nb_inputs: 2, multiple: false, apply_to: ['number', 'datetime'] },
    not_between: { type: 'not_between', nb_inputs: 2, multiple: false, apply_to: ['number', 'datetime'] },
    begins_with: { type: 'begins_with', nb_inputs: 1, multiple: false, apply_to: ['string'] },
    not_begins_with: { type: 'not_begins_with', nb_inputs: 1, multiple: false, apply_to: ['string'] },
    contains: { type: 'contains', nb_inputs: 1, multiple: false, apply_to: ['string'] },
    not_contains: { type: 'not_contains', nb_inputs: 1, multiple: false, apply_to: ['string'] },
    ends_with: { type: 'ends_with', nb_inputs: 1, multiple: false, apply_to: ['string'] },
    not_ends_with: { type: 'not_ends_with', nb_inputs: 1, multiple: false, apply_to: ['string'] },
    is_empty: { type: 'is_empty', nb_inputs: 0, multiple: false, apply_to: ['string'] },
    is_not_empty: { type: 'is_not_empty', nb_inputs: 0, multiple: false, apply_to: ['string'] },
    is_null: { type: 'is_null', nb_inputs: 0, multiple: false, apply_to: ['string', 'number', 'datetime', 'boolean'] },
    is_not_null: { type: 'is_not_null', nb_inputs: 0, multiple: false, apply_to: ['string', 'number', 'datetime', 'boolean'] },
    find_in_set: { type: 'find_in_set', nb_inputs: 1, multiple: false, apply_to: ['string', 'number', 'datetime', 'boolean'] }
}
QueryBuilder.SOURCES = {
    'fixed': 'fixed',
    'script': 'script',
    'dynamic': 'dynamic'
}

export default QueryBuilder