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Edit File: blob.js

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/************************************************************************/
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/************************************************************************/
var __webpack_exports__ = {};
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   createBlobURL: () => (/* binding */ createBlobURL),
/* harmony export */   downloadBlob: () => (/* binding */ downloadBlob),
/* harmony export */   getBlobByURL: () => (/* binding */ getBlobByURL),
/* harmony export */   getBlobTypeByURL: () => (/* binding */ getBlobTypeByURL),
/* harmony export */   isBlobURL: () => (/* binding */ isBlobURL),
/* harmony export */   revokeBlobURL: () => (/* binding */ revokeBlobURL)
/* harmony export */ });
/* wp:polyfill */
const cache = {};

/**
 * Create a blob URL from a file.
 *
 * @param file The file to create a blob URL for.
 *
 * @return The blob URL.
 */
function createBlobURL(file) {
  const url = window.URL.createObjectURL(file);
  cache[url] = file;
  return url;
}

/**
 * Retrieve a file based on a blob URL. The file must have been created by
 * `createBlobURL` and not removed by `revokeBlobURL`, otherwise it will return
 * `undefined`.
 *
 * @param url The blob URL.
 *
 * @return The file for the blob URL.
 */
function getBlobByURL(url) {
  return cache[url];
}

/**
 * Retrieve a blob type based on URL. The file must have been created by
 * `createBlobURL` and not removed by `revokeBlobURL`, otherwise it will return
 * `undefined`.
 *
 * @param url The blob URL.
 *
 * @return The blob type.
 */
function getBlobTypeByURL(url) {
  return getBlobByURL(url)?.type.split('/')[0]; // 0: media type , 1: file extension eg ( type: 'image/jpeg' ).
}

/**
 * Remove the resource and file cache from memory.
 *
 * @param url The blob URL.
 */
function revokeBlobURL(url) {
  if (cache[url]) {
    window.URL.revokeObjectURL(url);
  }
  delete cache[url];
}

/**
 * Check whether a url is a blob url.
 *
 * @param url The URL.
 *
 * @return Is the url a blob url?
 */
function isBlobURL(url) {
  if (!url || !url.indexOf) {
    return false;
  }
  return url.indexOf('blob:') === 0;
}

/**
 * Downloads a file, e.g., a text or readable stream, in the browser.
 * Appropriate for downloading smaller file sizes, e.g., < 5 MB.
 *
 * Example usage:
 *
 * ```js
 * 	const fileContent = JSON.stringify(
 * 		{
 * 			"title": "My Post",
 * 		},
 * 		null,
 * 		2
 * 	);
 * 	const filename = 'file.json';
 *
 * 	downloadBlob( filename, fileContent, 'application/json' );
 * ```
 *
 * @param filename    File name.
 * @param content     File content (BufferSource | Blob | string).
 * @param contentType (Optional) File mime type. Default is `''`.
 */
function downloadBlob(filename, content, contentType = '') {
  if (!filename || !content) {
    return;
  }
  const file = new window.Blob([content], {
    type: contentType
  });
  const url = window.URL.createObjectURL(file);
  const anchorElement = document.createElement('a');
  anchorElement.href = url;
  anchorElement.download = filename;
  anchorElement.style.display = 'none';
  document.body.appendChild(anchorElement);
  anchorElement.click();
  document.body.removeChild(anchorElement);
  window.URL.revokeObjectURL(url);
}

(window.wp = window.wp || {}).blob = __webpack_exports__;
/******/ })()
;