import type { SelectOptions } from './types';
export default class QuerySerializer {
    static serialize(query: SelectOptions, collectionName: string): Record<string, unknown>;
    private static formatSort;
    /**
     * Serialize filters to JSON with snake_case operators and aggregators.
     *
     * Internally, operators use PascalCase (e.g. `Equal`, `GreaterThan`) to match
     * the datasource-toolkit convention. However, HTTP backends expect snake_case:
     * - Ruby (forest_liana): requires `equal`, `greater_than`, etc.
     * - Node (@forestadmin/agent): accepts snake_case via ConditionTreeParser.toPascalCase()
     *
     * Converting to snake_case here ensures compatibility with both backends.
     */
    private static formatFilters;
    /**
     * Recursively walk the condition tree and convert operators/aggregators to snake_case.
     */
    private static toSnakeCaseOperators;
    /**
     * Convert PascalCase to snake_case.
     * Two passes handle different patterns:
     * - Pass 1: lowercase→uppercase boundaries (e.g. `greaterThan` → `greater_Than`)
     * - Pass 2: uppercase sequences (e.g. `IContains` → `I_Contains`, `PreviousXDays` → `PreviousX_Days`)
     */
    private static toSnakeCase;
    private static formatFields;
}
//# sourceMappingURL=query-serializer.d.ts.map