@descope/sdk-mixins/dist/esm/mixins/injectNpmLibMixin/helpers.js

Descope JavaScript SDK mixins

const getExistingScript = (scriptId) => {
    return document.querySelector(`script#${scriptId}`);
};
const isScriptLoaded = (script) => {
    return script.getAttribute('status') === 'loaded';
};
const isScriptError = (script) => {
    return script.getAttribute('status') === 'error';
};
const hashUrl = (url) => {
    let hash = 0;
    const urlStr = url.toString();
    for (let i = 0; i < urlStr.length; i++) {
        const char = urlStr.charCodeAt(i);
        hash = (hash << 5) - hash + char;
        hash = hash & hash; // Convert to 32-bit integer
    }
    return `${Math.abs(hash).toString()}`;
};
const setupScript = (id, integrity) => {
    const scriptEle = document.createElement('script');
    scriptEle.id = id;
    if (integrity) {
        scriptEle.integrity = integrity;
        scriptEle.crossOrigin = 'anonymous';
    }
    if (window.DESCOPE_NONCE) {
        scriptEle.setAttribute('nonce', window.DESCOPE_NONCE);
    }
    return scriptEle;
};
const injectScript = (scriptId, url, integrity) => {
    return new Promise((res, rej) => {
        const scriptEle = setupScript(scriptId, integrity);
        scriptEle.onerror = (error) => {
            scriptEle.setAttribute('status', 'error');
            rej(error);
        };
        scriptEle.onload = () => {
            scriptEle.setAttribute('status', 'loaded');
            res(scriptEle);
        };
        scriptEle.src = url.toString();
        document.body.appendChild(scriptEle);
    });
};
const handleExistingScript = (existingScript, expectedIntegrity) => {
    if (expectedIntegrity) {
        const actualIntegrity = existingScript.integrity;
        if (actualIntegrity !== expectedIntegrity) {
            return Promise.reject(new Error(`Integrity mismatch: expected ${expectedIntegrity}, found ${actualIntegrity}`));
        }
    }
    if (isScriptLoaded(existingScript)) {
        return Promise.resolve(existingScript);
    }
    if (isScriptError(existingScript)) {
        return Promise.reject();
    }
    return new Promise((res, rej) => {
        existingScript.addEventListener('load', () => {
            res(existingScript);
        });
        existingScript.addEventListener('error', (error) => {
            rej(error);
        });
    });
};
const injectScriptWithFallbacks = async (scriptsData, onError) => {
    for (const scriptData of scriptsData) {
        const { id, url, integrity } = scriptData;
        const existingScript = getExistingScript(id);
        if (existingScript) {
            try {
                await handleExistingScript(existingScript, integrity);
                return scriptData;
            }
            catch (e) {
                onError(scriptData, true);
            }
        }
        else {
            try {
                await injectScript(id, url, integrity);
                return scriptData;
            }
            catch (e) {
                onError(scriptData, false);
            }
        }
    }
    throw new Error('All scripts failed to load');
};
const generateLibUrls = (baseUrls, libName, version, path = '', integrity) => baseUrls.reduce((prev, curr) => {
    const baseUrl = curr;
    if (!baseUrl) {
        return prev;
    }
    let url;
    try {
        url = new URL(baseUrl);
    }
    catch (e) {
        throw new Error(`Invalid URL: ${baseUrl}`);
    }
    const isUrlIncludesPath = url.pathname !== '/';
    if (!isUrlIncludesPath) {
        url.pathname = `/npm/${libName}@${version}/${path}`;
    }
    const scriptData = {
        url: url,
        id: `npmlib-${libName.replaceAll('@', '').replaceAll('/', '_')}-${hashUrl(url)}`,
    };
    if (integrity) {
        scriptData.integrity = integrity;
    }
    return [...prev, scriptData];
}, []);

export { generateLibUrls, injectScriptWithFallbacks };
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