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import utils from '../utils.js';
import AxiosHeaders from './AxiosHeaders.js';
const headersToObject = (thing) => (thing instanceof AxiosHeaders ? { ...thing } : thing);
/**
* Config-specific merge-function which creates a new config-object
* by merging two configuration objects together.
*
* @param {Object} config1
* @param {Object} config2
*
* @returns {Object} New object resulting from merging config2 to config1
*/
export default function mergeConfig(config1, config2) {
// eslint-disable-next-line no-param-reassign
config1 = config1 || {};
config2 = config2 || {};
// Use a null-prototype object so that downstream reads such as `config.auth`
// or `config.baseURL` cannot inherit polluted values from Object.prototype.
// `hasOwnProperty` is restored as a non-enumerable own slot to preserve
// ergonomics for user code that relies on it.
const config = Object.create(null);
Object.defineProperty(config, 'hasOwnProperty', {
// Null-proto descriptor so a polluted Object.prototype.get cannot turn
// this data descriptor into an accessor descriptor on the way in.
__proto__: null,
value: Object.prototype.hasOwnProperty,
enumerable: false,
writable: true,
configurable: true,
});
function getMergedValue(target, source, prop, caseless) {
if (utils.isPlainObject(target) && utils.isPlainObject(source)) {
return utils.merge.call({ caseless }, target, source);
} else if (utils.isPlainObject(source)) {
return utils.merge({}, source);
} else if (utils.isArray(source)) {
return source.slice();
}
return source;
}
function mergeDeepProperties(a, b, prop, caseless) {
if (!utils.isUndefined(b)) {
return getMergedValue(a, b, prop, caseless);
} else if (!utils.isUndefined(a)) {
return getMergedValue(undefined, a, prop, caseless);
}
}
// eslint-disable-next-line consistent-return
function valueFromConfig2(a, b) {
if (!utils.isUndefined(b)) {
return getMergedValue(undefined, b);
}
}
// eslint-disable-next-line consistent-return
function defaultToConfig2(a, b) {
if (!utils.isUndefined(b)) {
return getMergedValue(undefined, b);
} else if (!utils.isUndefined(a)) {
return getMergedValue(undefined, a);
}
}
function getMergedTransitionalOption(prop) {
const transitional2 = utils.hasOwnProp(config2, 'transitional') ? config2.transitional : undefined;
if (!utils.isUndefined(transitional2)) {
if (utils.isPlainObject(transitional2)) {
if (utils.hasOwnProp(transitional2, prop)) {
return transitional2[prop];
}
} else {
return undefined;
}
}
const transitional1 = utils.hasOwnProp(config1, 'transitional') ? config1.transitional : undefined;
if (utils.isPlainObject(transitional1) && utils.hasOwnProp(transitional1, prop)) {
return transitional1[prop];
}
return undefined;
}
// eslint-disable-next-line consistent-return
function mergeDirectKeys(a, b, prop) {
if (utils.hasOwnProp(config2, prop)) {
return getMergedValue(a, b);
} else if (utils.hasOwnProp(config1, prop)) {
return getMergedValue(undefined, a);
}
}
const mergeMap = {
url: valueFromConfig2,
method: valueFromConfig2,
data: valueFromConfig2,
baseURL: defaultToConfig2,
transformRequest: defaultToConfig2,
transformResponse: defaultToConfig2,
paramsSerializer: defaultToConfig2,
timeout: defaultToConfig2,
timeoutMessage: defaultToConfig2,
withCredentials: defaultToConfig2,
withXSRFToken: defaultToConfig2,
adapter: defaultToConfig2,
responseType: defaultToConfig2,
xsrfCookieName: defaultToConfig2,
xsrfHeaderName: defaultToConfig2,
onUploadProgress: defaultToConfig2,
onDownloadProgress: defaultToConfig2,
decompress: defaultToConfig2,
maxContentLength: defaultToConfig2,
maxBodyLength: defaultToConfig2,
beforeRedirect: defaultToConfig2,
transport: defaultToConfig2,
httpAgent: defaultToConfig2,
httpsAgent: defaultToConfig2,
cancelToken: defaultToConfig2,
socketPath: defaultToConfig2,
allowedSocketPaths: defaultToConfig2,
responseEncoding: defaultToConfig2,
validateStatus: mergeDirectKeys,
headers: (a, b, prop) =>
mergeDeepProperties(headersToObject(a), headersToObject(b), prop, true),
};
utils.forEach(Object.keys({ ...config1, ...config2 }), function computeConfigValue(prop) {
if (prop === '__proto__' || prop === 'constructor' || prop === 'prototype') return;
const merge = utils.hasOwnProp(mergeMap, prop) ? mergeMap[prop] : mergeDeepProperties;
const a = utils.hasOwnProp(config1, prop) ? config1[prop] : undefined;
const b = utils.hasOwnProp(config2, prop) ? config2[prop] : undefined;
const configValue = merge(a, b, prop);
(utils.isUndefined(configValue) && merge !== mergeDirectKeys) || (config[prop] = configValue);
});
if (
utils.hasOwnProp(config2, 'validateStatus') &&
utils.isUndefined(config2.validateStatus) &&
getMergedTransitionalOption('validateStatusUndefinedResolves') === false
) {
if (utils.hasOwnProp(config1, 'validateStatus')) {
config.validateStatus = getMergedValue(undefined, config1.validateStatus);
} else {
delete config.validateStatus;
}
}
return config;
}
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