import { ContentFilterScalarOperator } from '../../common/constants/content.constant';
/**
 * A single filter condition: `field:op:value`.
 *
 * `field` is the JSONB leaf (or built-in column) addressed with its **storage
 * casing** and, for JSONB leaves, the `data.` prefix — e.g. `'data.symbol'`,
 * `'data.category'`, `'data.user_id'`. The builder does not auto-prefix
 * `data.` so non-JSONB columns (e.g. `'created_at'`) can also be addressed.
 */
export interface ContentFilterCondition {
    field: string;
    op: ContentFilterScalarOperator;
    /**
     * A `string` or `number`; numbers are stringified, never quoted.
     *
     * For the `in` operator an array of values may be supplied instead — it is
     * serialized comma-separated (`v1,v2,v3`), with each item quoted
     * individually when it contains whitespace. Arrays are only valid with
     * `in` and must not be empty.
     */
    value: string | number | readonly (string | number)[];
}
/**
 * Build an eaera-cms filter DSL string from conditions joined by ` AND `.
 *
 * @example
 *   buildFilter([{ field: 'data.symbol', op: 'eq', value: 'EURUSD' }])
 *   // → 'data.symbol:eq:EURUSD'
 * @example
 *   buildFilter([{ field: 'data.category', op: 'eq', value: 'CFDs on Stocks' }])
 *   // → 'data.category:eq:"CFDs on Stocks"'   (whitespace → quoted)
 * @example
 *   buildFilter([
 *     { field: 'data.symbol', op: 'contains', value: 'BTC' },
 *     { field: 'data.category', op: 'neq', value: 'Kalshi' },
 *   ])
 *   // → 'data.symbol:contains:BTC AND data.category:neq:Kalshi'
 * @example
 *   buildFilter([{ field: 'data.symbol', op: 'in', value: ['EURUSD', 'XAUUSD'] }])
 *   // → 'data.symbol:in:EURUSD,XAUUSD'
 *
 * @returns the DSL string, or `undefined` for an empty list (so callers can
 *   assign the result directly to a `filter?: string` param and omit it).
 */
export declare const buildFilter: (conditions: readonly ContentFilterCondition[]) => string | undefined;
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