Backend PUT Controller for Episode instance with extract src attribute logic

dummy_copy_podcast_v2.2

// import statements and other controllers clipped out...

// @desc    Update single episode
// @route   PUT /api/admin/episodes/:id
// @access  Private/Admin Only
// *** TO DO: Add validation and sanitization ***
export const updateEpisode = asyncHandler( async (req, res) => {
    
     let {
        title, 
        subtitle, 
        linkPodBean,
        image, 
        isReleased
     } = req.body;

    //  Extract the src attribute value from iframe string argument.
    // If match is found and there is a captured value, it returns that value. Otherwise returns empty string.
    const extractSrcFromIframe = (iframeString) => {
        // Regular expression pattern to match the src attribute value in the iframe string.
        const srcRegex = /src="([^"]*)"/;
        // Use match method to find the src attribute value and store it in the match array.
        const match = iframeString.match(srcRegex);
        // Check if the match array exists and contains the captured value.
        // That captured value we want is at index[1]
        if (match && match[1]) {
            // Return the captured src attribute value.
            return match[1];
        };
       // Return an empty string if no match was found.
       return '';
    };
 
    // Conditionally run the extractSrcFromIframe function to handle cases where the embed code already contains the src attribute.
    // If the src attribute is found, it replaces the linkPodBean with the extracted src value, ensuring smooth database entry.
    if (linkPodBean.includes('<iframe') || linkPodBean.includes('</iframe>')
        || linkPodBean.includes('iframe')) {
        const extractedSrc = extractSrcFromIframe(linkPodBean);
        if(extractedSrc) {
            linkPodBean = extractedSrc;
            console.log('extractedSrc: ', linkPodBean)
        } else {
            console.log('unable to extract src from iframe')
        };
    };
     
     const episode = await Episode.findById(req.params.id);
 
     if(episode) {
 
         episode.title = title
         episode.subtitle = subtitle
         episode.linkPodBean = linkPodBean
         episode.image = image
         episode.isReleased = isReleased
 
         const updatedEpisode =  await episode.save();
         res.status(201).json(updatedEpisode);
 
     } else {
         res.status(404)
         throw new Error('Episode not found')
     }
 
});

// Continued controllers clipped out...