packages/node_modules/pouchdb-errors/src/index.js

class PouchError extends Error {
  constructor(status, error, reason) {
    super();
    Error(reason);
    this.status = status;
    this.name = error;
    this.message = reason;
    this.error = true;
  }

  toString() {
    return JSON.stringify({
      status: this.status,
      name: this.name,
      message: this.message,
      reason: this.reason
    });
  }
}

var UNAUTHORIZED = new PouchError(401, 'unauthorized', "Name or password is incorrect.");
var MISSING_BULK_DOCS = new PouchError(400, 'bad_request', "Missing JSON list of 'docs'");
var MISSING_DOC = new PouchError(404, 'not_found', 'missing');
var REV_CONFLICT = new PouchError(409, 'conflict', 'Document update conflict');
var INVALID_ID = new PouchError(400, 'bad_request', '_id field must contain a string');
var MISSING_ID = new PouchError(412, 'missing_id', '_id is required for puts');
var RESERVED_ID = new PouchError(400, 'bad_request', 'Only reserved document ids may start with underscore.');
var NOT_OPEN = new PouchError(412, 'precondition_failed', 'Database not open');
var UNKNOWN_ERROR = new PouchError(500, 'unknown_error', 'Database encountered an unknown error');
var BAD_ARG = new PouchError(500, 'badarg', 'Some query argument is invalid');
var INVALID_REQUEST = new PouchError(400, 'invalid_request', 'Request was invalid');
var QUERY_PARSE_ERROR = new PouchError(400, 'query_parse_error', 'Some query parameter is invalid');
var DOC_VALIDATION = new PouchError(500, 'doc_validation', 'Bad special document member');
var BAD_REQUEST = new PouchError(400, 'bad_request', 'Something wrong with the request');
var NOT_AN_OBJECT = new PouchError(400, 'bad_request', 'Document must be a JSON object');
var DB_MISSING = new PouchError(404, 'not_found', 'Database not found');
var IDB_ERROR = new PouchError(500, 'indexed_db_went_bad', 'unknown');
var WSQ_ERROR = new PouchError(500, 'web_sql_went_bad', 'unknown');
var LDB_ERROR = new PouchError(500, 'levelDB_went_went_bad', 'unknown');
var FORBIDDEN = new PouchError(403, 'forbidden', 'Forbidden by design doc validate_doc_update function');
var INVALID_REV = new PouchError(400, 'bad_request', 'Invalid rev format');
var FILE_EXISTS = new PouchError(412, 'file_exists', 'The database could not be created, the file already exists.');
var MISSING_STUB = new PouchError(412, 'missing_stub', 'A pre-existing attachment stub wasn\'t found');
var INVALID_URL = new PouchError(413, 'invalid_url', 'Provided URL is invalid');

function createError(error, reason) {
  function CustomPouchError(reason) {
    // inherit error properties from our parent error manually
    // so as to allow proper JSON parsing.
    var names = Object.getOwnPropertyNames(error);
    for (var i = 0, len = names.length; i < len; i++) {
      if (typeof error[names[i]] !== 'function') {
        this[names[i]] = error[names[i]];
      }
    }

    if (this.stack === undefined) {
      this.stack = (new Error()).stack;
    }

    if (reason !== undefined) {
      this.reason = reason;
    }
  }
  CustomPouchError.prototype = PouchError.prototype;
  return new CustomPouchError(reason);
}

function generateErrorFromResponse(err) {

  if (typeof err !== 'object') {
    var data = err;
    err = UNKNOWN_ERROR;
    err.data = data;
  }

  if ('error' in err && err.error === 'conflict') {
    err.name = 'conflict';
    err.status = 409;
  }

  if (!('name' in err)) {
    err.name = err.error || 'unknown';
  }

  if (!('status' in err)) {
    err.status = 500;
  }

  if (!('message' in err)) {
    err.message = err.message || err.reason;
  }

  if (!('stack' in err)) {
    err.stack = (new Error()).stack;
  }

  return err;
}

export {
  UNAUTHORIZED,
  MISSING_BULK_DOCS,
  MISSING_DOC,
  REV_CONFLICT,
  INVALID_ID,
  MISSING_ID,
  RESERVED_ID,
  NOT_OPEN,
  UNKNOWN_ERROR,
  BAD_ARG,
  INVALID_REQUEST,
  QUERY_PARSE_ERROR,
  DOC_VALIDATION,
  BAD_REQUEST,
  NOT_AN_OBJECT,
  DB_MISSING,
  WSQ_ERROR,
  LDB_ERROR,
  FORBIDDEN,
  INVALID_REV,
  FILE_EXISTS,
  MISSING_STUB,
  IDB_ERROR,
  INVALID_URL,
  createError,
  generateErrorFromResponse
};