'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

var shared = require('@vue/shared');

function getError(action, option, xhr) {
  let msg;
  if (xhr.response) {
    msg = `${xhr.response.error || xhr.response}`;
  } else if (xhr.responseText) {
    msg = `${xhr.responseText}`;
  } else {
    msg = `fail to ${option.method} ${action} ${xhr.status}`;
  }
  const err = new Error(msg);
  err.status = xhr.status;
  err.method = option.method;
  err.url = action;
  return err;
}
function getBody(xhr) {
  const text = xhr.responseText || xhr.response;
  if (!text) {
    return text;
  }
  try {
    return JSON.parse(text);
  } catch (e) {
    return text;
  }
}
function upload(option) {
  if (typeof XMLHttpRequest === "undefined") {
    return;
  }
  const xhr = new XMLHttpRequest();
  const action = option.action;
  if (xhr.upload) {
    xhr.upload.onprogress = function progress(e) {
      if (e.total > 0) {
        ;
        e.percent = e.loaded / e.total * 100;
      }
      option.onProgress(e);
    };
  }
  const formData = new FormData();
  if (option.data) {
    Object.keys(option.data).forEach((key) => {
      formData.append(key, option.data[key]);
    });
  }
  formData.append(option.filename, option.file, option.file.name);
  xhr.onerror = function error() {
    option.onError(getError(action, option, xhr));
  };
  xhr.onload = function onload() {
    if (xhr.status < 200 || xhr.status >= 300) {
      return option.onError(getError(action, option, xhr));
    }
    option.onSuccess(getBody(xhr));
  };
  xhr.open(option.method, action, true);
  if (option.withCredentials && "withCredentials" in xhr) {
    xhr.withCredentials = true;
  }
  const headers = option.headers || {};
  for (const item in headers) {
    if (shared.hasOwn(headers, item) && headers[item] !== null) {
      xhr.setRequestHeader(item, headers[item]);
    }
  }
  if (headers instanceof Headers) {
    headers.forEach((value, key) => {
      xhr.setRequestHeader(key, value);
    });
  }
  xhr.send(formData);
  return xhr;
}

exports["default"] = upload;
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