next.js/examples/cms-buttercms/lib/api.js

import Butter from "buttercms";

let butter;

const previewSetting = process.env.PREVIEW;
// make preview mode by default
const preview =
  previewSetting === "true" || previewSetting === undefined ? 1 : 0;

try {
  butter = Butter(process.env.NEXT_PUBLIC_BUTTER_CMS_API_KEY, preview);
} catch (e) {
  console.log(e);
}

const defaultPageSize = 100;
const defaultPostCount = 10;

async function getLandingPagesData(page, pageSize = defaultPageSize) {
  try {
    const params = {
      page,
      page_size: pageSize,
    };
    const response = await butter.page.list("landing-page", params);

    return {
      pages: response?.data?.data,
      prevPage: response?.data?.meta.previous_page,
      nextPage: response?.data?.meta.next_page,
    };
  } catch (e) {
    throw e.response.data.detail;
  }
}

export async function getLandingPage(slug) {
  try {
    const page = await butter.page.retrieve("landing-page", slug);

    return page?.data?.data;
  } catch (e) {
    throw e.response.data.detail;
  }
}

export async function getLandingPages() {
  let paginatedLandingPages = [];
  let currentPage = 1;
  while (!!currentPage) {
    const landingPagesData = await getLandingPagesData(currentPage);
    paginatedLandingPages.push(...landingPagesData.pages);
    currentPage = landingPagesData.nextPage;
  }

  return paginatedLandingPages;
}

export async function getPostsData(
  { page, pageSize, tag, category } = { page: 1, pageSize: defaultPostCount },
) {
  try {
    // https://buttercms.com/docs/api/node?javascript#get-your-blog-posts
    const params = {
      page_size: pageSize || defaultPostCount,
      page: page || 1,
    };

    if (tag) {
      params.tag_slug = tag;
    }

    if (category) {
      params.category_slug = category;
    }
    const response = await butter.post.list(params);

    return {
      posts: response?.data?.data,
      prevPage: response?.data?.meta.previous_page,
      nextPage: response?.data?.meta.next_page,
    };
  } catch (e) {
    throw e.response.data.detail;
  }
}

export async function getPost(slug) {
  try {
    const response = await butter.post.retrieve(slug);

    return response?.data?.data;
  } catch (e) {
    throw e.response.data.detail;
  }
}

export async function getMainMenu() {
  try {
    const response = await butter.content.retrieve(["navigation_menu"]);

    const mainMenu = response?.data?.data?.navigation_menu.find(
      (menu) => menu.name === "Main menu",
    );

    return mainMenu ? mainMenu.menu_items : [];
  } catch (e) {
    throw e.response.data.detail;
  }
}

export async function getCategories() {
  try {
    const response = await butter.category.list();

    return response?.data?.data;
  } catch (e) {
    throw e.response.data.detail;
  }
}

export async function getTags() {
  try {
    const response = await butter.tag.list();

    return response?.data?.data;
  } catch (e) {
    throw e.response.data.detail;
  }
}

export async function searchPosts({ query }) {
  try {
    const response = await butter.post.search(query);

    return response?.data?.data;
  } catch (e) {
    throw e.response.data.detail;
  }
}