440 lines
14 KiB
TypeScript
440 lines
14 KiB
TypeScript
// classes.bucket.ts
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import * as plugins from './plugins.js';
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import * as helpers from './helpers.js';
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import * as interfaces from './interfaces.js';
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import { SmartBucket } from './classes.smartbucket.js';
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import { Directory } from './classes.directory.js';
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import { File } from './classes.file.js';
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import { Trash } from './classes.trash.js';
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/**
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* The bucket class exposes the basic functionality of a bucket.
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* The functions of the bucket alone are enough to
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* operate in S3 basic fashion on blobs of data.
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*/
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export class Bucket {
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public static async getBucketByName(smartbucketRef: SmartBucket, bucketNameArg: string) {
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const command = new plugins.s3.ListBucketsCommand({});
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const buckets = await smartbucketRef.s3Client.send(command);
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const foundBucket = buckets.Buckets.find((bucket) => bucket.Name === bucketNameArg);
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if (foundBucket) {
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console.log(`bucket with name ${bucketNameArg} exists.`);
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console.log(`Taking this as base for new Bucket instance`);
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return new this(smartbucketRef, bucketNameArg);
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} else {
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return null;
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}
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}
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public static async createBucketByName(smartbucketRef: SmartBucket, bucketName: string) {
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const command = new plugins.s3.CreateBucketCommand({ Bucket: bucketName });
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await smartbucketRef.s3Client.send(command).catch((e) => console.log(e));
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return new Bucket(smartbucketRef, bucketName);
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}
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public static async removeBucketByName(smartbucketRef: SmartBucket, bucketName: string) {
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const command = new plugins.s3.DeleteBucketCommand({ Bucket: bucketName });
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await smartbucketRef.s3Client.send(command).catch((e) => console.log(e));
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}
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public smartbucketRef: SmartBucket;
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public name: string;
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constructor(smartbucketRef: SmartBucket, bucketName: string) {
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this.smartbucketRef = smartbucketRef;
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this.name = bucketName;
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}
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/**
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* gets the base directory of the bucket
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*/
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public async getBaseDirectory(): Promise<Directory> {
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return new Directory(this, null, '');
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}
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/**
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* gets the trash directory
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*/
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public async getTrash(): Promise<Trash> {
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const trash = new Trash(this);
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return trash;
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}
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public async getDirectoryFromPath(
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pathDescriptorArg: interfaces.IPathDecriptor
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): Promise<Directory> {
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if (!pathDescriptorArg.path && !pathDescriptorArg.directory) {
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return this.getBaseDirectory();
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}
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const checkPath = await helpers.reducePathDescriptorToPath(pathDescriptorArg);
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const baseDirectory = await this.getBaseDirectory();
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return await baseDirectory.getSubDirectoryByName(checkPath);
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}
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// ===============
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// Fast Operations
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// ===============
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/**
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* store file
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*/
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public async fastPut(
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optionsArg: interfaces.IPathDecriptor & {
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contents: string | Buffer;
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overwrite?: boolean;
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}
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): Promise<File> {
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try {
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const reducedPath = await helpers.reducePathDescriptorToPath(optionsArg);
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const exists = await this.fastExists({ path: reducedPath });
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if (exists && !optionsArg.overwrite) {
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console.error(`Object already exists at path '${reducedPath}' in bucket '${this.name}'.`);
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return;
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} else if (exists && optionsArg.overwrite) {
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console.log(
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`Overwriting existing object at path '${reducedPath}' in bucket '${this.name}'.`
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);
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} else {
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console.log(`Creating new object at path '${reducedPath}' in bucket '${this.name}'.`);
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}
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const command = new plugins.s3.PutObjectCommand({
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Bucket: this.name,
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Key: reducedPath,
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Body: optionsArg.contents,
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});
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await this.smartbucketRef.s3Client.send(command);
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console.log(`Object '${reducedPath}' has been successfully stored in bucket '${this.name}'.`);
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const parsedPath = plugins.path.parse(reducedPath);
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return new File({
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directoryRefArg: await this.getDirectoryFromPath({
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path: parsedPath.dir,
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}),
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fileName: parsedPath.base,
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});
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} catch (error) {
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console.error(
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`Error storing object at path '${optionsArg.path}' in bucket '${this.name}':`,
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error
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);
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throw error;
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}
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}
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/**
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* get file
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*/
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public async fastGet(optionsArg: { path: string }): Promise<Buffer> {
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const done = plugins.smartpromise.defer();
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let completeFile: Buffer;
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const replaySubject = await this.fastGetReplaySubject(optionsArg);
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const subscription = replaySubject.subscribe({
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next: (chunk) => {
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if (completeFile) {
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completeFile = Buffer.concat([completeFile, chunk]);
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} else {
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completeFile = chunk;
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}
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},
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complete: () => {
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done.resolve();
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subscription.unsubscribe();
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},
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error: (err) => {
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console.log(err);
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},
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});
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await done.promise;
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return completeFile;
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}
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/**
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* good when time to first byte is important
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* and multiple subscribers are expected
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* @param optionsArg
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* @returns
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*/
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public async fastGetReplaySubject(optionsArg: {
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path: string;
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}): Promise<plugins.smartrx.rxjs.ReplaySubject<Buffer>> {
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const command = new plugins.s3.GetObjectCommand({
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Bucket: this.name,
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Key: optionsArg.path,
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});
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const response = await this.smartbucketRef.s3Client.send(command);
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const replaySubject = new plugins.smartrx.rxjs.ReplaySubject<Buffer>();
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// Convert the stream to a format that supports piping
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const stream = response.Body as any; // SdkStreamMixin includes readable stream
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if (typeof stream.pipe === 'function') {
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const duplexStream = new plugins.smartstream.SmartDuplex<Buffer, void>({
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writeFunction: async (chunk) => {
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replaySubject.next(chunk);
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return;
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},
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finalFunction: async (cb) => {
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replaySubject.complete();
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return;
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},
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});
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stream.pipe(duplexStream);
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}
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return replaySubject;
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}
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public fastGetStream(
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optionsArg: {
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path: string;
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},
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typeArg: 'webstream'
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): Promise<ReadableStream>;
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public async fastGetStream(
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optionsArg: {
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path: string;
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},
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typeArg: 'nodestream'
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): Promise<plugins.stream.Readable>;
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public async fastGetStream(
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optionsArg: { path: string },
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typeArg: 'webstream' | 'nodestream' = 'nodestream'
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): Promise<ReadableStream | plugins.stream.Readable> {
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const command = new plugins.s3.GetObjectCommand({
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Bucket: this.name,
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Key: optionsArg.path,
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});
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const response = await this.smartbucketRef.s3Client.send(command);
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const stream = response.Body as any; // SdkStreamMixin includes readable stream
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const duplexStream = new plugins.smartstream.SmartDuplex<Buffer, Buffer>({
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writeFunction: async (chunk) => {
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return chunk;
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},
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finalFunction: async (cb) => {
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return null;
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},
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});
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if (typeof stream.pipe === 'function') {
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stream.pipe(duplexStream);
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}
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if (typeArg === 'nodestream') {
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return duplexStream;
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}
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if (typeArg === 'webstream') {
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return (await duplexStream.getWebStreams()).readable;
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}
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}
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/**
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* store file as stream
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*/
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public async fastPutStream(optionsArg: {
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path: string;
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readableStream: plugins.stream.Readable | ReadableStream;
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nativeMetadata?: { [key: string]: string };
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overwrite?: boolean;
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}): Promise<void> {
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try {
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const exists = await this.fastExists({ path: optionsArg.path });
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if (exists && !optionsArg.overwrite) {
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console.error(
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`Object already exists at path '${optionsArg.path}' in bucket '${this.name}'.`
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);
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return;
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} else if (exists && optionsArg.overwrite) {
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console.log(
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`Overwriting existing object at path '${optionsArg.path}' in bucket '${this.name}'.`
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);
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} else {
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console.log(`Creating new object at path '${optionsArg.path}' in bucket '${this.name}'.`);
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}
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const command = new plugins.s3.PutObjectCommand({
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Bucket: this.name,
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Key: optionsArg.path,
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Body: optionsArg.readableStream,
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Metadata: optionsArg.nativeMetadata,
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});
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await this.smartbucketRef.s3Client.send(command);
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console.log(
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`Object '${optionsArg.path}' has been successfully stored in bucket '${this.name}'.`
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);
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} catch (error) {
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console.error(
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`Error storing object at path '${optionsArg.path}' in bucket '${this.name}':`,
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error
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);
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throw error;
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}
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}
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public async fastCopy(optionsArg: {
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sourcePath: string;
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destinationPath?: string;
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targetBucket?: Bucket;
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nativeMetadata?: { [key: string]: string };
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deleteExistingNativeMetadata?: boolean;
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}): Promise<void> {
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try {
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const targetBucketName = optionsArg.targetBucket ? optionsArg.targetBucket.name : this.name;
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// Retrieve current object information to use in copy conditions
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const currentObjInfo = await this.smartbucketRef.s3Client.send(
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new plugins.s3.HeadObjectCommand({
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Bucket: this.name,
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Key: optionsArg.sourcePath,
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})
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);
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// Prepare new metadata
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const newNativeMetadata = {
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...(optionsArg.deleteExistingNativeMetadata ? {} : currentObjInfo.Metadata),
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...optionsArg.nativeMetadata,
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};
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// Define the copy operation
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const copySource = `${this.name}/${optionsArg.sourcePath}`;
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const command = new plugins.s3.CopyObjectCommand({
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Bucket: targetBucketName,
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CopySource: copySource,
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Key: optionsArg.destinationPath || optionsArg.sourcePath,
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Metadata: newNativeMetadata,
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MetadataDirective: optionsArg.deleteExistingNativeMetadata ? 'REPLACE' : 'COPY',
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});
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await this.smartbucketRef.s3Client.send(command);
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} catch (err) {
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console.error('Error updating metadata:', err);
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throw err; // rethrow to allow caller to handle
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}
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}
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/**
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* Move object from one path to another within the same bucket or to another bucket
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*/
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public async fastMove(optionsArg: {
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sourcePath: string;
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destinationPath: string;
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targetBucket?: Bucket;
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overwrite?: boolean;
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}): Promise<void> {
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try {
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const destinationBucket = optionsArg.targetBucket || this;
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const exists = await destinationBucket.fastExists({ path: optionsArg.destinationPath });
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if (exists && !optionsArg.overwrite) {
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console.error(
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`Object already exists at destination path '${optionsArg.destinationPath}' in bucket '${destinationBucket.name}'.`
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);
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return;
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} else if (exists && optionsArg.overwrite) {
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console.log(
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`Overwriting existing object at destination path '${optionsArg.destinationPath}' in bucket '${destinationBucket.name}'.`
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);
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} else {
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console.log(
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`Moving object to path '${optionsArg.destinationPath}' in bucket '${destinationBucket.name}'.`
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);
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}
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await this.fastCopy(optionsArg);
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await this.fastRemove({ path: optionsArg.sourcePath });
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console.log(
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`Object '${optionsArg.sourcePath}' has been successfully moved to '${optionsArg.destinationPath}' in bucket '${destinationBucket.name}'.`
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);
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} catch (error) {
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console.error(
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`Error moving object from '${optionsArg.sourcePath}' to '${optionsArg.destinationPath}':`,
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error
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);
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throw error;
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}
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}
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/**
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* removeObject
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*/
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public async fastRemove(optionsArg: { path: string }) {
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const command = new plugins.s3.DeleteObjectCommand({
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Bucket: this.name,
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Key: optionsArg.path,
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});
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await this.smartbucketRef.s3Client.send(command);
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}
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/**
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* check whether file exists
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* @param optionsArg
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* @returns
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*/
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public async fastExists(optionsArg: { path: string }): Promise<boolean> {
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try {
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const command = new plugins.s3.HeadObjectCommand({
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Bucket: this.name,
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Key: optionsArg.path,
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});
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await this.smartbucketRef.s3Client.send(command);
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console.log(`Object '${optionsArg.path}' exists in bucket '${this.name}'.`);
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return true;
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} catch (error) {
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if (error.name === 'NotFound') {
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console.log(`Object '${optionsArg.path}' does not exist in bucket '${this.name}'.`);
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return false;
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} else {
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console.error('Error checking object existence:', error);
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throw error; // Rethrow if it's not a NotFound error to handle unexpected issues
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}
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}
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}
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/**
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* deletes this bucket
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*/
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public async delete() {
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await this.smartbucketRef.s3Client.send(
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new plugins.s3.DeleteBucketCommand({ Bucket: this.name })
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);
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}
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public async fastStat(pathDescriptor: interfaces.IPathDecriptor) {
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const checkPath = await helpers.reducePathDescriptorToPath(pathDescriptor);
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const command = new plugins.s3.HeadObjectCommand({
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Bucket: this.name,
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Key: checkPath,
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});
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return this.smartbucketRef.s3Client.send(command);
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}
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public async isDirectory(pathDescriptor: interfaces.IPathDecriptor): Promise<boolean> {
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const checkPath = await helpers.reducePathDescriptorToPath(pathDescriptor);
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const command = new plugins.s3.ListObjectsV2Command({
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Bucket: this.name,
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Prefix: checkPath,
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Delimiter: '/',
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});
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const response = await this.smartbucketRef.s3Client.send(command);
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return response.CommonPrefixes.length > 0;
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}
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public async isFile(pathDescriptor: interfaces.IPathDecriptor): Promise<boolean> {
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const checkPath = await helpers.reducePathDescriptorToPath(pathDescriptor);
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const command = new plugins.s3.ListObjectsV2Command({
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Bucket: this.name,
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Prefix: checkPath,
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Delimiter: '/',
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});
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const response = await this.smartbucketRef.s3Client.send(command);
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return response.Contents.length > 0;
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}
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}
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