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import { HttpClient } from '@angular/common/http';
import { firstValueFrom } from 'rxjs';
import { IStorageProvider } from '../../domain/interfaces/storage.interface';
import { IPFSConfig } from '../../domain/interfaces/ipfs.interface';
import { IPFSClient } from './ipfs-client.service';
import { IndexedDbStorageService } from '../indexed-db-storage.service';
import { IPFSShareLinkService } from './ipfs-share-link.service';
export const IPFS_CONFIG = 'IPFS_CONFIG';
@Injectable({
providedIn: 'root'
})
export class IPFSStorageService implements IStorageProvider {
private ipfsClient: IPFSClient;
private localCache: IndexedDbStorageService;
private cidToPathMap = new Map<string, string>();
private pathToCidMap = new Map<string, string>();
constructor(
@Inject(IPFS_CONFIG) config: IPFSConfig,
http: HttpClient,
localCache: IndexedDbStorageService,
private shareLinkService: IPFSShareLinkService
) {
this.ipfsClient = new IPFSClient(http, config);
this.localCache = localCache;
this.loadCidMappings();
}
async write(path: string, data: Uint8Array): Promise<void> {
try {
// Write to local cache first for immediate availability
await this.localCache.write(path, data);
// Upload to IPFS
const result = await firstValueFrom(this.ipfsClient.add(data));
// Store CID mapping
this.cidToPathMap.set(result.cid, path);
this.pathToCidMap.set(path, result.cid);
await this.saveCidMappings();
console.log(`Stored ${path} with CID: ${result.cid}`);
} catch (error) {
console.error('Failed to write to IPFS:', error);
// Local cache still has the data, so operation is partially successful
throw error;
}
}
async read(path: string): Promise<Uint8Array> {
try {
// Try local cache first
if (await this.localCache.exists(path)) {
return await this.localCache.read(path);
}
// If not in cache, try IPFS
const cid = this.pathToCidMap.get(path);
if (!cid) {
throw new Error(`No CID mapping found for path: ${path}`);
}
const data = await firstValueFrom(this.ipfsClient.get(cid));
// Cache locally for future reads
await this.localCache.write(path, data);
return data;
} catch (error) {
console.error('Failed to read from IPFS:', error);
throw error;
}
}
async exists(path: string): Promise<boolean> {
// Check local cache first
if (await this.localCache.exists(path)) {
return true;
}
// Check if we have a CID mapping
return this.pathToCidMap.has(path);
}
async delete(path: string): Promise<void> {
// Delete from local cache
await this.localCache.delete(path);
// Remove CID mapping (but don't unpin from IPFS as others might use it)
const cid = this.pathToCidMap.get(path);
if (cid) {
this.pathToCidMap.delete(path);
this.cidToPathMap.delete(cid);
await this.saveCidMappings();
}
}
async list(): Promise<string[]> {
// Return paths from both local cache and CID mappings
const localPaths = await this.localCache.list();
const ipfsPaths = Array.from(this.pathToCidMap.keys());
// Combine and deduplicate
return Array.from(new Set([...localPaths, ...ipfsPaths]));
}
private async loadCidMappings(): Promise<void> {
try {
const mappingsData = await this.localCache.read('_ipfs_mappings');
const mappings = JSON.parse(new TextDecoder().decode(mappingsData));
this.cidToPathMap = new Map(mappings.cidToPath);
this.pathToCidMap = new Map(mappings.pathToCid);
} catch (error) {
// No mappings yet, start fresh
console.log('No existing CID mappings found');
}
}
private async saveCidMappings(): Promise<void> {
const mappings = {
cidToPath: Array.from(this.cidToPathMap.entries()),
pathToCid: Array.from(this.pathToCidMap.entries())
};
const data = new TextEncoder().encode(JSON.stringify(mappings));
await this.localCache.write('_ipfs_mappings', data);
}
/**
* Get the CID for a given path
*/
getCidForPath(path: string): string | undefined {
return this.pathToCidMap.get(path);
}
/**
* Check if IPFS client is healthy
*/
async isHealthy(): Promise<boolean> {
try {
return await firstValueFrom(this.ipfsClient.isHealthy());
} catch {
return false;
}
}
/**
* Generate a shareable link for content
*/
generateShareLink(path: string, filename?: string): string | null {
const cid = this.getCidForPath(path);
if (!cid) {
return null;
}
return this.shareLinkService.generateShareLink(cid, { filename });
}
/**
* Generate multiple share links for different gateways
*/
generateMultipleShareLinks(path: string, filename?: string): string[] {
const cid = this.getCidForPath(path);
if (!cid) {
return [];
}
return this.shareLinkService.generateMultipleShareLinks(cid, { filename });
}
/**
* Get share link service for advanced operations
*/
getShareLinkService(): IPFSShareLinkService {
return this.shareLinkService;
}
} |