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import { Subject, BehaviorSubject } from 'rxjs';
import { IPFSStorageService } from './ipfs-storage.service';
export interface UploadQueueItem {
id: string;
path: string;
data: Uint8Array;
status: 'pending' | 'uploading' | 'completed' | 'failed';
progress: number;
cid?: string;
error?: string;
timestamp: Date;
}
export interface UploadQueueStatus {
total: number;
pending: number;
uploading: number;
completed: number;
failed: number;
}
@Injectable({
providedIn: 'root'
})
export class IPFSUploadQueueService {
private queue: Map<string, UploadQueueItem> = new Map();
private queueSubject = new BehaviorSubject<UploadQueueItem[]>([]);
private statusSubject = new BehaviorSubject<UploadQueueStatus>({
total: 0,
pending: 0,
uploading: 0,
completed: 0,
failed: 0
});
private uploadProgressSubject = new Subject<UploadQueueItem>();
private maxConcurrentUploads = 3;
private activeUploads = 0;
private autoProcess = true;
queue$ = this.queueSubject.asObservable();
status$ = this.statusSubject.asObservable();
uploadProgress$ = this.uploadProgressSubject.asObservable();
constructor(private ipfsStorage: IPFSStorageService) {}
/**
* Enable or disable automatic processing (useful for testing)
*/
setAutoProcess(enabled: boolean): void {
this.autoProcess = enabled;
if (enabled) {
this.processQueue();
}
}
/**
* Add a file to the upload queue
*/
addToQueue(path: string, data: Uint8Array): string {
const id = this.generateId();
const item: UploadQueueItem = {
id,
path,
data,
status: 'pending',
progress: 0,
timestamp: new Date()
};
this.queue.set(id, item);
this.updateQueueState();
if (this.autoProcess) {
this.processQueue();
}
return id;
}
/**
* Add multiple files to the queue
*/
addMultipleToQueue(files: Array<{ path: string; data: Uint8Array }>): string[] {
const ids = files.map(file => this.addToQueue(file.path, file.data));
return ids;
}
/**
* Cancel an upload
*/
cancelUpload(id: string): void {
const item = this.queue.get(id);
if (item && item.status === 'pending') {
this.queue.delete(id);
this.updateQueueState();
}
}
/**
* Clear completed uploads from the queue
*/
clearCompleted(): void {
Array.from(this.queue.entries()).forEach(([id, item]) => {
if (item.status === 'completed') {
this.queue.delete(id);
}
});
this.updateQueueState();
}
/**
* Retry failed uploads
*/
retryFailed(): void {
Array.from(this.queue.values()).forEach(item => {
if (item.status === 'failed') {
item.status = 'pending';
item.progress = 0;
delete item.error;
}
});
this.updateQueueState();
Iif (this.autoProcess) {
this.processQueue();
}
}
/**
* Get upload item by ID
*/
getUpload(id: string): UploadQueueItem | undefined {
return this.queue.get(id);
}
private async processQueue(): Promise<void> {
if (this.activeUploads >= this.maxConcurrentUploads) {
return;
}
const pendingItems = Array.from(this.queue.values())
.filter(item => item.status === 'pending')
.sort((a, b) => a.timestamp.getTime() - b.timestamp.getTime());
if (pendingItems.length === 0) {
return;
}
const item = pendingItems[0];
await this.uploadItem(item);
}
private async uploadItem(item: UploadQueueItem): Promise<void> {
try {
this.activeUploads++;
item.status = 'uploading';
item.progress = 0;
this.updateQueueState();
this.uploadProgressSubject.next(item);
// Simulate progress updates
const progressInterval = setInterval(() => {
if (item.progress < 90) {
item.progress += Math.random() * 20;
this.uploadProgressSubject.next(item);
}
}, 500);
await this.ipfsStorage.write(item.path, item.data);
clearInterval(progressInterval);
item.status = 'completed';
item.progress = 100;
item.cid = this.ipfsStorage.getCidForPath(item.path);
this.uploadProgressSubject.next(item);
} catch (error) {
item.status = 'failed';
item.error = error instanceof Error ? error.message : 'Upload failed';
this.uploadProgressSubject.next(item);
} finally {
this.activeUploads--;
this.updateQueueState();
// Process next item in queue
setTimeout(() => this.processQueue(), 100);
}
}
private updateQueueState(): void {
const items = Array.from(this.queue.values());
this.queueSubject.next(items);
const status: UploadQueueStatus = {
total: items.length,
pending: items.filter(i => i.status === 'pending').length,
uploading: items.filter(i => i.status === 'uploading').length,
completed: items.filter(i => i.status === 'completed').length,
failed: items.filter(i => i.status === 'failed').length
};
this.statusSubject.next(status);
}
private generateId(): string {
return `upload-${Date.now()}-${Math.random().toString(36).substr(2, 9)}`;
}
} |