contentful-content-management-api.js

// Next.js API route support: https://nextjs.org/docs/api-routes/introduction
// Create a file in your pages folder and define what actions to take on your content

import * as contentful from "contentful-management";

export default async (req, res) => {
  console.log("whats in request body", typeof req.body);
  const client = contentful.createClient({
    // This is the access token for this space. Normally you get the token in the Contentful web app
    accessToken: "ppfbfBBbqdaC4KTIqne8rtJhU_XXChx6rBzXbX6x8gI",
  });

  try {
    // This API call will request a space with the specified ID
    const space = await client.getSpace("f4l65z8z9erw");
    // This API call will request an environment with the specified ID
    const env = await space.getEnvironment("master");
    // Now that we have an environment, we can get entries from that space
    for (let product of JSON.parse(req.body)) {
      const entry = await env.getEntry(product.id);
      //if the user is trying to buy more of the item than there is in stock, throw an error
      if ((entry.fields.quantityInStock["en-US"] - parseInt(product.quantity)) < 0) {
        console.log("inside the if, less than 0");
        res.status(500).json({
          success: false,
          message: "=============Not enough products in stock===============",
        });
      } else {
        entry.fields.quantityInStock["en-US"] =
          entry.fields.quantityInStock["en-US"] - parseInt(product.quantity);
        console.log(entry);
        const updatedProduct = await entry.update();
        await updatedProduct.publish();
        res.status(200).json({ success: true });
      }
    }
  } catch (error) {
    console.log(error);
    res.status(500).json({ success: false, message: "Error updating product" });
  }
};


----------------------------------------------------------------------------------------------------------------------
//In your react component that will be triggering a content update (sale of a product in this case)
//Pass a function that calls your API as an onClick so call this when the user clicks "Checkout"

    async function handleCheckout(){
        //call api and reroute people to thank you screen
        const response = await fetch("/api/updateProductQuantity", {
            method: "POST",
            body: JSON.stringify(cartItems),
        });
        console.log("this is the response from our API call", response);
        if (response.status === 200) {
            //display thank you component OR redirect to thank you page
        } else {
            //display error component
        }
    }