sana137.in

Sana's gatsbyjs-based blog
git clone http://git.hanabi.in/repos/sana137.in.git
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gatsby-node.js (2806B)

      1 const path = require('path');
      2 const tagData = require('./src/tagData');
      3 
      4 const createTagPages = (createPage, posts) => {
      5   const allTagsIndexTemplate = path.resolve('src/templates/allTagsIndex.js');
      6   const singleTagIndexTemplate = path.resolve(
      7     'src/templates/singleTagIndex.js'
      8   );
      9 
     10   const postsByTag = {};
     11   posts.forEach(({ node }) => {
     12     if (node.frontmatter.tags) {
     13       node.frontmatter.tags.forEach(tag => {
     14         if (!postsByTag[tag]) {
     15           postsByTag[tag] = [];
     16         }
     17         postsByTag[tag].push(node);
     18       });
     19     }
     20   });
     21 
     22   const tags = Object.keys(postsByTag);
     23 
     24   createPage({
     25     path: '/tags',
     26     component: allTagsIndexTemplate,
     27     context: {
     28       tags: tags.sort(),
     29     },
     30   });
     31 
     32   tags.forEach(tag => {
     33     const posts = postsByTag[tag];
     34     const cover = tagData.filter(el => el.tag == tag);
     35     createPage({
     36       path: `/tags/${tag}`,
     37       component: singleTagIndexTemplate,
     38       context: {
     39         cover,
     40         posts,
     41         tag,
     42       },
     43     });
     44   });
     45 };
     46 
     47 exports.createPages = ({ graphql, actions }) => {
     48   const { createPage } = actions;
     49   return new Promise((resolve, reject) => {
     50     const BlogPostTemplate = path.resolve('src/templates/blogPost.js');
     51     resolve(
     52       graphql(
     53         `
     54           query {
     55             site {
     56               siteMetadata {
     57                 author
     58                 description
     59                 name
     60                 photo
     61               }
     62             }
     63             allMarkdownRemark(
     64               sort: { order: DESC, fields: [frontmatter___date] }
     65             ) {
     66               edges {
     67                 node {
     68                   frontmatter {
     69                     cover
     70                     date
     71                     excerpt
     72                     path
     73                     tags
     74                     title
     75                   }
     76                 }
     77               }
     78             }
     79           }
     80         `
     81       ).then(result => {
     82         const {
     83           author,
     84           description,
     85           name,
     86           photo,
     87         } = result.data.site.siteMetadata;
     88         const posts = result.data.allMarkdownRemark.edges;
     89         createTagPages(createPage, posts);
     90 
     91         posts.forEach(({ node }, index) => {
     92           createPage({
     93             path: node.frontmatter.path,
     94             component: BlogPostTemplate,
     95             context: {
     96               author,
     97               cover: node.frontmatter.cover,
     98               date: node.frontmatter.date,
     99               description,
    100               name,
    101               next: index === posts.length - 1 ? null : posts[index + 1].node,
    102               pathSlug: node.frontmatter.path,
    103               photo,
    104               prev: index === 0 ? null : posts[index - 1].node,
    105               tags: node.frontmatter.tags,
    106             },
    107           });
    108           resolve();
    109         });
    110       })
    111     );
    112   });
    113 };