@codefast/image-loader/dist/cjs/base-loader.d.ts

Flexible image loader for Next.js supporting multiple CDN providers

import type { ImageLoaderProps } from "next/image";
import type { ImageLoader } from "./types";
/**
 * Abstract base class for image loaders
 * Implements the Template Method pattern and follows the Open/Closed Principle
 */
export declare abstract class BaseImageLoader implements ImageLoader {
    protected readonly config?: {
        defaultQuality?: number;
    } | undefined;
    protected readonly defaultQuality: number;
    constructor(config?: {
        defaultQuality?: number;
    } | undefined);
    /**
     * Template method that defines the algorithm for loading images
     * Follows the Template Method pattern
     */
    load(config: ImageLoaderProps): string;
    /**
     * Abstract method to check if this loader can handle the given URL
     * Each loader defines its own domain/pattern matching logic
     */
    abstract canHandle(source: string): boolean;
    /**
     * Abstract method to get the loader name
     * Each loader provides its own identifier
     */
    abstract getName(): string;
    /**
     * Abstract method to be implemented by concrete loaders
     * Each loader defines its own URL transformation logic
     */
    protected abstract transformUrl(config: ImageLoaderProps): string;
    /**
     * Validates the input configuration
     * Common validation logic for all loaders
     */
    protected validateConfig(config: ImageLoaderProps): void;
    /**
     * Normalizes the configuration by applying defaults
     * Common normalization logic for all loaders
     */
    protected normalizeConfig(config: ImageLoaderProps): ImageLoaderProps;
    /**
     * Utility method to extract domain from URL
     * Helper method for domain-based loader selection
     */
    protected extractDomain(url: string): string;
    /**
     * Utility method to build query parameters using query-string library
     * Helper method for URL construction
     */
    protected buildQueryParams(params: Record<string, number | string | undefined>): string;
    /**
     * Utility method to ensure URL has protocol
     * Helper method for URL normalization
     */
    protected ensureProtocol(url: string, defaultProtocol?: string): string;
}
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