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import { assertType } from '../crud/util';
import { FLAG } from '../consts/FLAG';
import { newExistsError, newFile404Error, newFolder404Error, newMissingError } from '../fsa-to-crud/util';
import type { FsPromisesApi } from '../node/types';
import type * as crud from '../crud/types';
import type { IDirent } from '../node/types/misc';
export interface NodeCrudOptions {
readonly fs: FsPromisesApi;
readonly dir: string;
readonly separator?: string;
}
export class NodeCrud implements crud.CrudApi {
protected readonly fs: FsPromisesApi;
protected readonly dir: string;
protected readonly separator: string;
public constructor(protected readonly options: NodeCrudOptions) {
this.separator = options.separator ?? '/';
let dir = options.dir;
const last = dir[dir.length - 1];
if (last !== this.separator) dir = dir + this.separator;
this.dir = dir;
this.fs = options.fs;
}
protected async checkDir(collection: crud.CrudCollection): Promise<string> {
const dir = this.dir + (collection.length ? collection.join(this.separator) + this.separator : '');
const fs = this.fs;
try {
const stats = await fs.stat(dir);
Iif (!stats.isDirectory()) throw newFolder404Error(collection);
return dir;
} catch (error) {
if (error && typeof error === 'object') {
switch (error.code) {
case 'ENOENT':
case 'ENOTDIR':
throw newFolder404Error(collection);
}
}
throw error;
}
}
public readonly put = async (
collection: crud.CrudCollection,
id: string,
data: Uint8Array,
options?: crud.CrudPutOptions,
): Promise<void> => {
assertType(collection, 'put', 'crudfs');
assertName(id, 'put', 'crudfs');
const dir = this.dir + (collection.length ? collection.join(this.separator) + this.separator : '');
const fs = this.fs;
if (dir.length > 1) await fs.mkdir(dir, { recursive: true });
const filename = dir + id;
switch (options?.throwIf) {
case 'exists': {
try {
await fs.writeFile(filename, data, { flag: FLAG.O_CREAT | FLAG.O_EXCL });
} catch (error) {
if (error && typeof error === 'object' && error.code === 'EEXIST') throw newExistsError();
throw error;
}
break;
}
case 'missing': {
try {
await fs.writeFile(filename, data, { flag: FLAG.O_RDWR });
} catch (error) {
if (error && typeof error === 'object' && error.code === 'ENOENT') throw newMissingError();
throw error;
}
break;
}
default: {
await fs.writeFile(filename, data);
}
}
};
public readonly get = async (collection: crud.CrudCollection, id: string): Promise<Uint8Array> => {
assertType(collection, 'get', 'crudfs');
assertName(id, 'get', 'crudfs');
const dir = await this.checkDir(collection);
const filename = dir + id;
const fs = this.fs;
try {
const buf = (await fs.readFile(filename)) as Buffer;
return new Uint8Array(buf.buffer, buf.byteOffset, buf.byteLength);
} catch (error) {
if (error && typeof error === 'object') {
switch (error.code) {
case 'ENOENT':
throw newFile404Error(collection, id);
}
}
throw error;
}
};
public readonly del = async (collection: crud.CrudCollection, id: string, silent?: boolean): Promise<void> => {
assertType(collection, 'del', 'crudfs');
assertName(id, 'del', 'crudfs');
try {
const dir = await this.checkDir(collection);
const filename = dir + id;
await this.fs.unlink(filename);
} catch (error) {
if (!!silent) return;
if (error && typeof error === 'object') {
switch (error.code) {
case 'ENOENT':
throw newFile404Error(collection, id);
}
}
throw error;
}
};
public readonly info = async (collection: crud.CrudCollection, id?: string): Promise<crud.CrudResourceInfo> => {
assertType(collection, 'info', 'crudfs');
if (id) {
assertName(id, 'info', 'crudfs');
await this.checkDir(collection);
try {
const stats = await this.fs.stat(this.dir + collection.join(this.separator) + this.separator + id);
Iif (!stats.isFile()) throw newFile404Error(collection, id);
return {
type: 'resource',
id,
size: <number>stats.size,
modified: <number>stats.mtimeMs,
};
} catch (error) {
if (error && typeof error === 'object') {
switch (error.code) {
case 'ENOENT':
throw newFile404Error(collection, id);
}
}
throw error;
}
} else {
await this.checkDir(collection);
try {
const stats = await this.fs.stat(this.dir + collection.join(this.separator));
Iif (!stats.isDirectory()) throw newFolder404Error(collection);
return {
type: 'collection',
id: '',
};
} catch (error) {
Iif (error && typeof error === 'object') {
switch (error.code) {
case 'ENOENT':
case 'ENOTDIR':
throw newFolder404Error(collection);
}
}
throw error;
}
}
};
public readonly drop = async (collection: crud.CrudCollection, silent?: boolean): Promise<void> => {
assertType(collection, 'drop', 'crudfs');
try {
const dir = await this.checkDir(collection);
const isRoot = dir === this.dir;
if (isRoot) {
const list = (await this.fs.readdir(dir)) as string[];
for (const entry of list) await this.fs.rmdir(dir + entry, { recursive: true });
} else {
await this.fs.rmdir(dir, { recursive: true });
}
} catch (error) {
if (!silent) throw error;
}
};
public readonly scan = async function* (
collection: crud.CrudCollection,
): AsyncIterableIterator<crud.CrudCollectionEntry> {
assertType(collection, 'scan', 'crudfs');
const dir = await this.checkDir(collection);
const dirents = (await this.fs.readdir(dir, { withFileTypes: true })) as IDirent[];
for await (const entry of dirents) {
if (entry.isFile()) {
yield {
type: 'resource',
id: '' + entry.name,
};
} else if (entry.isDirectory()) {
yield {
type: 'collection',
id: '' + entry.name,
};
}
}
};
public readonly list = async (collection: crud.CrudCollection): Promise<crud.CrudCollectionEntry[]> => {
const entries: crud.CrudCollectionEntry[] = [];
for await (const entry of this.scan(collection)) entries.push(entry);
return entries;
};
public readonly from = async (collection: crud.CrudCollection): Promise<crud.CrudApi> => {
assertType(collection, 'from', 'crudfs');
const dir = this.dir + (collection.length ? collection.join(this.separator) + this.separator : '');
const fs = this.fs;
Iif (dir.length > 1) await fs.mkdir(dir, { recursive: true });
await this.checkDir(collection);
return new NodeCrud({
dir,
fs: this.fs,
separator: this.separator,
});
};
}
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