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const _ = require("lodash");
/**
* Mimicry of Headers class from WebAPI for Batch responses
* keep current behavior by dynamic properties
*
* @public
*
* @class Headers
*/
class Headers {
/**
* Create instance of Headers
*
* @param {Array} rawHeaders array of batch response headers
*
* @constructor
*/
constructor(rawHeaders) {
this.headerKeys = [];
this.parseHeadersArray(rawHeaders);
}
/**
* Convert rawHeaders array to instance properties
* and fill headerKeys map
*
* @param {Array} rawHeaders array of batch response headers
*
* @private
*/
parseHeadersArray(rawHeaders) {
_.each(rawHeaders, (headerValue, index) => {
let headerKey;
if (index % 2) {
headerKey = rawHeaders[index - 1];
this[headerKey] = headerValue;
this.headerKeys.push(headerKey);
}
});
}
/**
* Returns content of the header by its name
* the headerName comparation is case-insensitive
*
* @param {String} headerName header name to find
*
* @returns {String} header content
*
* @public
*/
get(headerName) {
const normalizedKey = _.find(
this.headerKeys,
(headerKey) =>
_.isString(headerName) &&
_.isString(headerKey) &&
headerName.toLowerCase() === headerKey.toLowerCase()
);
return this[normalizedKey];
}
}
module.exports = Headers;
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