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import { BehaviorSubject, Observable } from 'rxjs';
import { map } from 'rxjs/operators';
export interface CIDMapping {
cid: string;
path: string;
hash: string;
timestamp: Date;
size?: number;
mimeType?: string;
pinned?: boolean;
}
export interface CIDMappingStats {
totalMappings: number;
totalSize: number;
pinnedCount: number;
oldestMapping?: Date;
newestMapping?: Date;
}
@Injectable({
providedIn: 'root'
})
export class IPFSCIDMappingService {
private mappings = new Map<string, CIDMapping>();
private mappingsByPath = new Map<string, string>(); // path -> cid
private mappingsByHash = new Map<string, string>(); // hash -> cid
private mappingsSubject = new BehaviorSubject<CIDMapping[]>([]);
private statsSubject = new BehaviorSubject<CIDMappingStats>({
totalMappings: 0,
totalSize: 0,
pinnedCount: 0
});
mappings$ = this.mappingsSubject.asObservable();
stats$ = this.statsSubject.asObservable();
constructor() {
this.loadMappings();
}
/**
* Add a new CID mapping
*/
addMapping(mapping: CIDMapping): void {
this.mappings.set(mapping.cid, mapping);
this.mappingsByPath.set(mapping.path, mapping.cid);
this.mappingsByHash.set(mapping.hash, mapping.cid);
this.saveMappings();
this.updateState();
}
/**
* Get mapping by CID
*/
getMappingByCID(cid: string): CIDMapping | undefined {
return this.mappings.get(cid);
}
/**
* Get mapping by path
*/
getMappingByPath(path: string): CIDMapping | undefined {
const cid = this.mappingsByPath.get(path);
return cid ? this.mappings.get(cid) : undefined;
}
/**
* Get mapping by content hash
*/
getMappingByHash(hash: string): CIDMapping | undefined {
const cid = this.mappingsByHash.get(hash);
return cid ? this.mappings.get(cid) : undefined;
}
/**
* Update mapping information
*/
updateMapping(cid: string, updates: Partial<CIDMapping>): void {
const mapping = this.mappings.get(cid);
if (mapping) {
Object.assign(mapping, updates);
this.saveMappings();
this.updateState();
}
}
/**
* Remove a mapping
*/
removeMapping(cid: string): void {
const mapping = this.mappings.get(cid);
if (mapping) {
this.mappings.delete(cid);
this.mappingsByPath.delete(mapping.path);
this.mappingsByHash.delete(mapping.hash);
this.saveMappings();
this.updateState();
}
}
/**
* Search mappings by various criteria
*/
searchMappings(query: string): Observable<CIDMapping[]> {
const lowerQuery = query.toLowerCase();
return this.mappings$.pipe(
map(mappings => mappings.filter(mapping =>
mapping.cid.toLowerCase().includes(lowerQuery) ||
mapping.path.toLowerCase().includes(lowerQuery) ||
mapping.hash.toLowerCase().includes(lowerQuery) ||
(mapping.mimeType && mapping.mimeType.toLowerCase().includes(lowerQuery))
))
);
}
/**
* Get mappings by date range
*/
getMappingsByDateRange(startDate: Date, endDate: Date): Observable<CIDMapping[]> {
return this.mappings$.pipe(
map(mappings => mappings.filter(mapping =>
mapping.timestamp >= startDate && mapping.timestamp <= endDate
))
);
}
/**
* Get pinned mappings
*/
getPinnedMappings(): Observable<CIDMapping[]> {
return this.mappings$.pipe(
map(mappings => mappings.filter(mapping => mapping.pinned))
);
}
/**
* Export mappings as JSON
*/
exportMappings(): string {
const data = {
version: '1.0',
timestamp: new Date().toISOString(),
mappings: Array.from(this.mappings.values())
};
return JSON.stringify(data, null, 2);
}
/**
* Import mappings from JSON
*/
importMappings(jsonData: string): void {
try {
const data = JSON.parse(jsonData);
if (data.mappings && Array.isArray(data.mappings)) {
data.mappings.forEach((mapping: any) => {
if (mapping.cid && mapping.path && mapping.hash) {
this.addMapping({
...mapping,
timestamp: new Date(mapping.timestamp)
});
}
});
}
} catch (error) {
console.error('Failed to import mappings:', error);
throw new Error('Invalid mapping data format');
}
}
/**
* Clear all mappings
*/
clearMappings(): void {
this.mappings.clear();
this.mappingsByPath.clear();
this.mappingsByHash.clear();
this.saveMappings();
this.updateState();
}
private loadMappings(): void {
try {
const savedData = localStorage.getItem('ipfs-cid-mappings');
if (savedData) {
const data = JSON.parse(savedData);
data.mappings.forEach((mapping: any) => {
const mappingObj: CIDMapping = {
...mapping,
timestamp: new Date(mapping.timestamp)
};
this.mappings.set(mappingObj.cid, mappingObj);
this.mappingsByPath.set(mappingObj.path, mappingObj.cid);
this.mappingsByHash.set(mappingObj.hash, mappingObj.cid);
});
this.updateState();
}
} catch (error) {
console.error('Failed to load CID mappings:', error);
}
}
private saveMappings(): void {
try {
const data = {
version: '1.0',
mappings: Array.from(this.mappings.values())
};
localStorage.setItem('ipfs-cid-mappings', JSON.stringify(data));
} catch (error) {
console.error('Failed to save CID mappings:', error);
}
}
private updateState(): void {
const mappingsArray = Array.from(this.mappings.values());
this.mappingsSubject.next(mappingsArray);
const stats: CIDMappingStats = {
totalMappings: mappingsArray.length,
totalSize: mappingsArray.reduce((sum, m) => sum + (m.size || 0), 0),
pinnedCount: mappingsArray.filter(m => m.pinned).length
};
if (mappingsArray.length > 0) {
const timestamps = mappingsArray.map(m => m.timestamp);
stats.oldestMapping = new Date(Math.min(...timestamps.map(d => d.getTime())));
stats.newestMapping = new Date(Math.max(...timestamps.map(d => d.getTime())));
}
this.statsSubject.next(stats);
}
} |