A social knowledge tool for researchers built on ATProto
cosmik.network
1import { Result, ok, err } from '../../../../shared/core/Result';
2import { IMetadataService } from '../../domain/services/IMetadataService';
3import { UrlMetadata } from '../../domain/value-objects/UrlMetadata';
4import { URL } from '../../domain/value-objects/URL';
5
6export class FakeMetadataService implements IMetadataService {
7 private metadataMap: Map<string, UrlMetadata> = new Map();
8 private shouldFail: boolean = false;
9 private available: boolean = true;
10
11 async fetchMetadata(url: URL): Promise<Result<UrlMetadata>> {
12 if (!this.available) {
13 return err(new Error('Metadata service is not available'));
14 }
15
16 if (this.shouldFail) {
17 return err(new Error('Failed to fetch metadata'));
18 }
19
20 // Check if we have pre-configured metadata for this URL
21 const existingMetadata = this.metadataMap.get(url.value);
22 if (existingMetadata) {
23 return ok(existingMetadata);
24 }
25
26 // Generate fake metadata
27 const metadataResult = UrlMetadata.create({
28 url: url.value,
29 title: `Fake Title for ${url.value}`,
30 description: `Fake description for ${url.value}`,
31 author: 'Fake Author',
32 siteName: 'Fake Site',
33 retrievedAt: new Date(),
34 });
35
36 if (metadataResult.isErr()) {
37 return err(
38 new Error(`Failed to create metadata: ${metadataResult.error.message}`),
39 );
40 }
41
42 return ok(metadataResult.value);
43 }
44
45 async isAvailable(): Promise<boolean> {
46 return this.available;
47 }
48
49 // Test helper methods
50 public setMetadata(url: string, metadata: UrlMetadata): void {
51 this.metadataMap.set(url, metadata);
52 }
53
54 public setShouldFail(shouldFail: boolean): void {
55 this.shouldFail = shouldFail;
56 }
57
58 public setAvailable(available: boolean): void {
59 this.available = available;
60 }
61
62 public clear(): void {
63 this.metadataMap.clear();
64 this.shouldFail = false;
65 this.available = true;
66 }
67}