88 lines
2.4 KiB
TypeScript
88 lines
2.4 KiB
TypeScript
/**
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* Use Case: GetMediaUseCase
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*
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* Handles the business logic for retrieving media information.
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*/
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import type { IMediaRepository } from '../../domain/repositories/IMediaRepository';
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import type { Logger, UseCaseOutputPort } from '@core/shared/application';
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import { Result } from '@core/shared/application/Result';
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import type { ApplicationErrorCode } from '@core/shared/errors/ApplicationErrorCode';
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export interface GetMediaInput {
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mediaId: string;
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}
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export interface GetMediaResult {
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media: {
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id: string;
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filename: string;
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originalName: string;
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mimeType: string;
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size: number;
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url: string;
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type: string;
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uploadedBy: string;
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uploadedAt: Date;
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metadata?: Record<string, any>;
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};
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}
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export type GetMediaErrorCode = 'MEDIA_NOT_FOUND' | 'REPOSITORY_ERROR';
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export class GetMediaUseCase {
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constructor(
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private readonly mediaRepo: IMediaRepository,
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private readonly output: UseCaseOutputPort<GetMediaResult>,
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private readonly logger: Logger,
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) {}
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async execute(
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input: GetMediaInput,
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): Promise<Result<void, ApplicationErrorCode<GetMediaErrorCode, { message: string }>>> {
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this.logger.info('[GetMediaUseCase] Getting media', {
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mediaId: input.mediaId,
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});
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try {
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const media = await this.mediaRepo.findById(input.mediaId);
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if (!media) {
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return Result.err<void, ApplicationErrorCode<GetMediaErrorCode, { message: string }>>({
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code: 'MEDIA_NOT_FOUND',
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details: { message: 'Media not found' },
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});
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}
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const mediaResult: GetMediaResult['media'] = {
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id: media.id,
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filename: media.filename,
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originalName: media.originalName,
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mimeType: media.mimeType,
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size: media.size,
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url: media.url.value,
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type: media.type,
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uploadedBy: media.uploadedBy,
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uploadedAt: media.uploadedAt,
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};
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if (media.metadata !== undefined) {
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mediaResult.metadata = media.metadata;
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}
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this.output.present({ media: mediaResult });
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return Result.ok(undefined);
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} catch (error) {
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const err = error instanceof Error ? error : new Error(String(error));
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this.logger.error('[GetMediaUseCase] Error getting media', err, {
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mediaId: input.mediaId,
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});
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return Result.err<void, ApplicationErrorCode<GetMediaErrorCode, { message: string }>>({
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code: 'REPOSITORY_ERROR',
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details: { message: err.message },
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});
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}
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}
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} |