app/assets/javascripts/download_util.js

   1 (function () {
   2   OSM.downloadBlob = function (blob, filename) {
   3     const url = URL.createObjectURL(blob);
   4     const a = document.createElement("a");
   5     a.href = url;
   6     a.download = filename;
   7     document.body.appendChild(a);
   8     a.click();
   9     document.body.removeChild(a);
  10     URL.revokeObjectURL(url);
  11   };
  12
  13   class DownloadUtil {
  14     static async handleExportSuccess(fetchResponse, filename) {
  15       try {
  16         const blob = await fetchResponse.response.blob();
  17         OSM.downloadBlob(blob, filename);
  18       } catch (err) {
  19         // eslint-disable-next-line no-alert
  20         alert(OSM.i18n.t("javascripts.share.export_failed", { reason: "(blob error)" }));
  21       }
  22     }
  23
  24     static async handleExportError(event) {
  25       let detailMessage;
  26       try {
  27         detailMessage = event?.detail?.error?.message;
  28         if (!detailMessage) {
  29           const responseText = await event.detail.fetchResponse.responseText;
  30           const parser = new DOMParser();
  31           const doc = parser.parseFromString(responseText, "text/html");
  32           detailMessage = doc.body ? doc.body.textContent.trim() : "(unknown)";
  33         }
  34       } catch (err) {
  35         detailMessage = "(unknown)";
  36       }
  37       // eslint-disable-next-line no-alert
  38       alert(OSM.i18n.t("javascripts.share.export_failed", { reason: detailMessage }));
  39     }
  40
  41     static getTurboBlobHandler(filename) {
  42       return function (event) {
  43         if (event.detail.success) {
  44           DownloadUtil.handleExportSuccess(event.detail.fetchResponse, filename);
  45         } else {
  46           DownloadUtil.handleExportError(event);
  47         }
  48       };
  49     }
  50   }
  51
  52   OSM.getTurboBlobHandler = DownloadUtil.getTurboBlobHandler;
  53 }());