Sindbad~EG File Manager

{
  "version": 3,
  "sources": ["../../../src/dialects/mssql/async-queue.ts"],
  "sourcesContent": ["import BaseError from '../../errors/base-error';\nimport ConnectionError from '../../errors/connection-error';\n\n/**\n * Thrown when a connection to a database is closed while an operation is in progress\n */\nexport class AsyncQueueError extends BaseError {\n  constructor(message: string) {\n    super(message);\n    this.name = 'SequelizeAsyncQueueError';\n  }\n}\n\nclass AsyncQueue {\n  previous: Promise<unknown>;\n  closed: boolean;\n  rejectCurrent: (reason?: any) => void;\n\n  constructor() {\n    this.previous = Promise.resolve();\n    this.closed = false;\n    this.rejectCurrent = () => {\n      /** do nothing */\n    };\n  }\n\n  close() {\n    this.closed = true;\n    this.rejectCurrent(\n      new ConnectionError(\n        new AsyncQueueError(\n          'the connection was closed before this query could finish executing'\n        )\n      )\n    );\n  }\n\n  enqueue(asyncFunction: (...args: any[]) => Promise<unknown>) {\n    // This outer promise might seems superflous since down below we return asyncFunction().then(resolve, reject).\n    // However, this ensures that this.previous will never be a rejected promise so the queue will\n    // always keep going, while still communicating rejection from asyncFunction to the user.\n    return new Promise((resolve, reject) => {\n      this.previous = this.previous.then(() => {\n        this.rejectCurrent = reject;\n        if (this.closed) {\n          return reject(\n            new ConnectionError(\n              new AsyncQueueError(\n                'the connection was closed before this query could be executed'\n              )\n            )\n          );\n        }\n        return asyncFunction().then(resolve, reject);\n      });\n    });\n  }\n}\n\nexport default AsyncQueue;\n"],
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