vercel__next.js/examples/cms-webiny/lib/api.ts

async function fetchAPI(
  query: string,
  { variables } = {} as any,
  preview: boolean,
) {
  const url = preview
    ? `${process.env.NEXT_PUBLIC_WEBINY_PREVIEW_API_URL}`
    : `${process.env.NEXT_PUBLIC_WEBINY_API_URL}`;

  const res = await fetch(url, {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      Authorization: `Bearer ${process.env.WEBINY_API_SECRET}`,
    },
    body: JSON.stringify({
      query,
      variables,
    }),
  });

  const json = await res.json();
  if (json.errors) {
    console.error(json.errors);
    throw new Error("Failed to fetch API");
  }

  return json.data;
}

export async function getAllPostsWithSlug() {
  const data = await fetchAPI(
    `
      query PostSlugs {
        listPosts {
          data {
            slug
          }
        }
      }
    `,
    {},
    false,
  );
  return data?.listPosts.data;
}

export async function getAllPostsForHome(preview) {
  const data = await fetchAPI(
    `
      query Posts {
        listPosts {
          data {
            id
            title
            slug
            description
            createdOn
            featuredImage
            author {
              name
              picture
            }
          }
        }
      }
    `,
    {},
    preview,
  );
  return data.listPosts.data;
}

export async function getPostBySlug(slug, preview) {
  const data = await fetchAPI(
    `
      query PostBySlug( $PostsGetWhereInput: PostsGetWhereInput!) {
        post: getPosts( where: $PostsGetWhereInput ) {
          data {
            id
            title
            slug
            description
            createdOn
            featuredImage
            body
            author {
              name
              picture
            }
          }
        }
        morePosts: listPosts(limit: 2, sort: createdOn_ASC) {
          data {
            id
            title
            slug
            description
            createdOn
            featuredImage
            author {
              name
              picture
      
            }
          }
        }
      }
    `,
    {
      variables: {
        PostsGetWhereInput: {
          slug: slug,
        },
      },
    },
    preview,
  );
  return data;
}