POC Umbraco edit bookmarklet

uBookmarklet.js

/*
    Install from here: https://codepen.io/filipbech/full/RwarLVL
    
    Before this becomes external, we should probably make the bookmarklet a loader and have the 
    source somewhere remote, so we can update it withot people having to re-install
    
*/

(async () => {
    const pageIdMetaTag = document.querySelector('meta[name=umb-page-id]');
    const backOfficeUrlMetaTag = document.querySelector('meta[name=umb-backoffice-url]'); 

    let backofficeUrl = location.origin+'/umbraco'; //default
    if(backOfficeUrlMetaTag && backOfficeUrlMetaTag.getAttribute('content')) {
        backofficeUrl = backOfficeUrlMetaTag.getAttribute('content');
    };

    const go = id => window.open(`${backofficeUrl}/#/content/${ id ? `content/edit/${id}` : ''}`);

    if(pageIdMetaTag && pageIdMetaTag.getAttribute('content')) {
        return go(pageIdMetaTag.getAttribute('content'));
    }

    const locationParts = location.pathname.replace(/^\/|\/$/g,'').split('/');
    const query = locationParts[locationParts.length-1];

    const cookies = document.cookie
        .split(';')
        .map(v => v.split('='))
        .reduce((acc, v) => {
            acc[decodeURIComponent(v[0].trim())] = decodeURIComponent(v[1].trim());
            return acc;
        }, {});

    const response = await fetch(`${backofficeUrl}/backoffice/UmbracoApi/Entity/SearchAll?query=${query}`, {
            headers: {
                accept: 'application/json, text/plain, */*',
                'x-umb-xsrf-token': cookies['UMB-XSRF-TOKEN']
            },
            "mode": "cors",
            "credentials": "include"
        });

    if(response.status === 404) {
        return alert('Doesnt seem to be an umbraco site');
    }

    if(!query && document.body.dataset.siteid) {
        //empty frontpage (so "/" pathname, use uno specific siteId if present)
        return go(document.body.dataset.siteid);
    }

    if(response.status === 200) {
        const resultAsText = await response.text();
        const result = JSON.parse(resultAsText.substr(6));
        if(result && result.Content && result.Content.results) {
            const page = result.Content.results.find(res => res.metaData.Url === location.pathname);
            
            if(page) {
                // Umbraco page found - go to that one
                return go(page.id);
            }
        }
    }
    // most like an umbraco site that is unauthorized (or down)

    return go(null);
})();