Refining engine targeting

build/page-writer.js

@@ -1,58 +1,105 @@
 const path = require('path');
 const Promise = require('bluebird');
 const fs = require('fs-extra');
-const getEngines = require('./engines');
-const { resolve, ROOT, ENGINE } = require('./resolve');
+const { map, uniq } = require('lodash');
+const { resolve, ROOT } = require('./resolve');
 const { siteInfo }  = require(resolve('package.json'));
 
-module.exports = exports = async function writePageContent (pages, posts, prod) {
-  const engines = await getEngines(prod);
-  const postIndex = await processPages(engines, posts, null, prod);
-  await processPages(engines, pages, posts, prod);
+module.exports = exports = async function writePageContent (engines, pages, posts, prod) {
+  const postIndex = index(posts, engines);
+  await processPages(engines, [ ...posts, ...pages ], postIndex, prod);
   return postIndex;
 };
 
+function index (posts, engines) {
+  posts = posts.filter((p) => !p.draft);
+
+  siblings(posts);
+
+  // fill in post content
+  posts.forEach((p) => { p.content = engines[p.type](p.source, pageState(p)); });
+
+  const reducedPosts = posts.map(pageJSON);
+
+  const authors = uniq(map(reducedPosts, 'author').flat()).sort((a, b) => (a.toUpperCase() > b.toUpperCase() ? 1 : -1));
+
+  const tagMap = reducedPosts.reduce((o, p) => Object.assign(o, p.tags), {});
+  const tags = Object.keys(tagMap).sort().reduce((result, tagslug) => {
+    result[tagslug] = tagMap[tagslug];
+    return result;
+  }, {});
+
+  return {
+    posts: reducedPosts,
+    authors,
+    tags,
+    latest: posts[0],
+  };
+}
+
+function siblings (posts) {
+  let first, prev, next, last;
+  for (let i = 0; i < posts.length; i++) {
+    const post = posts[i];
+    first = i > 0 && posts[0];
+    prev = posts[i - 1] || false;
+    next = posts[i + 1] || false;
+    last = i < posts.length - 1 && posts[posts.length - 1];
+
+    post.siblings = {
+      first: first && first.url,
+      prev: prev && prev.url,
+      next: next && next.url,
+      last: last && last.url,
+    };
+  }
+}
+
+function pageState (page, posts) {
+  return {
+    ...page,
+    meta: { ...page.meta, ...page },
+    page: {
+      domain: siteInfo.domain,
+      title: page.meta.title
+        ? (page.meta.title + (page.meta.subtitle ? ', ' + page.meta.subtitle : '') + ' :: ' + siteInfo.title)
+        : siteInfo.title,
+      description: page.meta.description || siteInfo.description,
+    },
+    site: siteInfo,
+    local: {
+      cwd: resolve(page.cwd),
+      root: ROOT,
+      basename: page.basename,
+    },
+    posts,
+  };
+}
+
+function pageJSON (post) {
+  return {
+    url: post.url,
+    fullurl: post.fullurl,
+    json: '/' + post.json,
+    title: post.meta.title,
+    subtitle: post.meta.subtitle,
+    description: post.meta.description,
+    date: post.dateCreated,
+    titlecard: post.titlecard,
+    tags: post.meta.tags,
+    author: post.meta.author,
+    siblings: post.sibling,
+  };
+}
+
 function processPages (engines, pages, posts, prod) {
   return Promise.map(pages, async (page) => {
-    // page = new Page(page);
 
-    var data = {
-      ...page,
-      meta: { ...page.meta, ...page },
-      page: {
-        domain: siteInfo.domain,
-        title: page.meta.title
-          ? (page.meta.title + (page.meta.subtitle ? ', ' + page.meta.subtitle : '') + ' :: ' + siteInfo.title)
-          : siteInfo.title,
-        description: page.meta.description || siteInfo.description,
-      },
-      site: siteInfo,
-      local: {
-        cwd: resolve(page.cwd),
-        root: ROOT,
-        basename: page.basename,
-      },
-      posts,
-    };
+    const state = pageState(page, posts);
+    const json = pageJSON(page);
+    const html = String(engines[page.engine](page.source, state));
 
-    const json = {
-      url: page.url,
-      fullurl: page.fullurl,
-      title: page.meta.title,
-      subtitle: page.meta.subtitle,
-      description: page.meta.description,
-      date: page.dateCreated,
-      titlecard: page.titlecard,
-      tags: page.meta.tags,
-      author: page.meta.author,
-    };
-
-    const html = String(engines[page.engine](data.source, data));
-    if (page.engine === ENGINE.MARKDOWN) {
-      json.preview = String(engines.MARKDOWN_PREVIEW(data.source, data));
-      page.content = String(engines.MARKDOWN_CONTENT(data.source, data));
-      json.content = page.content;
-    }
+    json.content = page.content;
 
     const output = resolve('dist', page.out);
     await fs.ensureDir(path.dirname(output));
@@ -62,16 +109,5 @@ function processPages (engines, pages, posts, prod) {
         prod ? JSON.stringify(json) : JSON.stringify(json, null, 2),
       )),
     ]);
-
-    return !page.draft && {
-      url: page.url,
-      json: page.json,
-      title: page.meta.title,
-      subtitle: page.meta.subtitle,
-      description: page.meta.description,
-      date: page.dateCreated,
-      tags: page.meta.tags,
-      author: page.meta.author,
-    };
   });
 }