cloudfunctions/ClearingRedundantFolders/node_modules/atomically/src/utils/temp.ts

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/* IMPORT */

import * as path from 'path';
import {LIMIT_BASENAME_LENGTH} from '../consts';
import {Disposer} from '../types';
import FS from './fs';

/* TEMP */

//TODO: Maybe publish this as a standalone package

const Temp = {

  store: <Record<string, boolean>> {}, // filePath => purge

  create: ( filePath: string ): string => {

    const randomness = `000000${Math.floor ( Math.random () * 16777215 ).toString ( 16 )}`.slice ( -6 ), // 6 random-enough hex characters
          timestamp = Date.now ().toString ().slice ( -10 ), // 10 precise timestamp digits
          prefix = 'tmp-',
          suffix = `.${prefix}${timestamp}${randomness}`,
          tempPath = `${filePath}${suffix}`;

    return tempPath;

  },

  get: ( filePath: string, creator: ( filePath: string ) => string, purge: boolean = true ): [string, Disposer] => {

    const tempPath = Temp.truncate ( creator ( filePath ) );

    if ( tempPath in Temp.store ) return Temp.get ( filePath, creator, purge ); // Collision found, try again

    Temp.store[tempPath] = purge;

    const disposer = () => delete Temp.store[tempPath];

    return [tempPath, disposer];

  },

  purge: ( filePath: string ): void => {

    if ( !Temp.store[filePath] ) return;

    delete Temp.store[filePath];

    FS.unlinkAttempt ( filePath );

  },

  purgeSync: ( filePath: string ): void => {

    if ( !Temp.store[filePath] ) return;

    delete Temp.store[filePath];

    FS.unlinkSyncAttempt ( filePath );