text: import React from "react";
  import PropTypes from "prop-types";
  import { kebabCase } from "lodash";
  import Helmet from "react-helmet";
  import { graphql, Link } from "gatsby";
  import Layout from "../components/Layout";
  import Content, { HTMLContent } from "../components/Content";
  
  export const BlogPostTemplate = ({
    content,
    contentComponent,
    description,
    tags,
    title,
    helmet
  }) => {
    const PostContent = contentComponent || Content;
  
    return (
      <section className="blog-post">
        {helmet || ""}
        <div className="blog-post__content">
          <br />
          <div className="columns">
            <div className="column is-10 is-offset-1">
              <h1 className="title is-size-2 has-text-weight-bold is-bold-light">
                {title}
              </h1>
              <p>{description}</p>
              <PostContent content={content} />
              {tags &&
              tags.length && (
              <div style={{ marginTop: `4rem` }}>
              <h4>Tags</h4>
              <ul className="taglist">
              {tags.map(tag => (
              <li key={tag + `tag`}>
              <Link to={`/tags/${kebabCase(tag)}/`}>{tag}</Link>
              </li>
              ))}
              </ul>
              </div>
              )}
            </div>
          </div>
        </div>
      </section>
    );
  };
  
  BlogPostTemplate.propTypes = {
    content: PropTypes.node.isRequired,
    contentComponent: PropTypes.func,
    description: PropTypes.string,
    title: PropTypes.string,
    helmet: PropTypes.instanceOf(Helmet)
  };
  
  const BlogPost = ({ data }) => {
    const { markdownRemark: post } = data;
  
    return (
      <Layout>
        <BlogPostTemplate
          content={post.html}
          contentComponent={HTMLContent}
          description={post.frontmatter.description}
          helmet={<Helmet title={`${post.frontmatter.title} | Blog`} />}
          tags={post.frontmatter.tags}
          title={post.frontmatter.title}
        />
      </Layout>
    );
  };
  
  BlogPost.propTypes = {
    data: PropTypes.shape({
      markdownRemark: PropTypes.object
    })
  };
  
  export default BlogPost;
  
  export const pageQuery = graphql`
    query BlogPostByID($id: String!) {
      markdownRemark(id: { eq: $id }) {
        id
        html
        frontmatter {
          date(formatString: "MMMM DD, YYYY")
          title
          description
          tags
        }
      }
    }
  `;
  