import type { Signal } from '@nonoun/native-core';
export interface GatewayOptions {
    /** Parse the fetch response into a string. Default: `res.text()` */
    parse?: (res: Response) => Promise<string>;
    /** Build the save request body from content. Default: plain text body */
    serialize?: (content: string) => BodyInit;
    /** Content-Type header for save requests. Default: `text/plain` */
    contentType?: string;
}
export declare class GatewayController {
    #private;
    readonly host: HTMLElement;
    /** True while a load request is in-flight. */
    readonly loading: Signal<boolean>;
    /** True while a save request is in-flight. */
    readonly saving: Signal<boolean>;
    /** Last error message, or null. */
    readonly error: Signal<string | null>;
    /** True when content has changed since the last load or save. */
    readonly dirty: Signal<boolean>;
    constructor(host: HTMLElement, options?: GatewayOptions);
    load(url: string): Promise<string | null>;
    save(url: string, content: string): Promise<boolean>;
    markDirty(): void;
    markClean(): void;
    abort(): void;
    destroy(): void;
}
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