From 5e5f5f8b8ba73fd8d3182b9b3b7ff338cd6cc3e0 Mon Sep 17 00:00:00 2001
From: Christopher Olah <colah@google.com>
Date: Wed, 4 Jan 2017 13:55:39 -0800
Subject: [PATCH] work on meta tags

---
 components/meta.js | 105 +++++++++++++++++++++++++++++++++++++++++++++
 index.js           |  11 +++--
 test-data.js       |  46 ++++++++++++++++++++
 3 files changed, 159 insertions(+), 3 deletions(-)
 create mode 100644 components/meta.js
 create mode 100644 test-data.js

diff --git a/components/meta.js b/components/meta.js
new file mode 100644
index 0000000..aeec664
--- /dev/null
+++ b/components/meta.js
@@ -0,0 +1,105 @@
+export default function(dom, data) {
+  dom.querySelector("html").setAttribute("lang", "en")
+  let head = dom.querySelector("head");
+
+  if (!dom.querySelector("meta[charset]")) {
+    appendHtml(head, `<meta charset="utf-8">`);
+  }
+  if (!dom.querySelector("meta[name=viewport]")) {
+    appendHtml(head, `<meta name="viewport" content="width=device-width, initial-scale=1">`);
+  }
+
+  appendHtml(head, `
+    <meta http-equiv="X-UA-Compatible" content="IE=Edge,chrome=1">
+    <link rel="icon" type="image/png" href="/favicon.png">
+    <link href="/rss.xml" rel="alternate" type="application/rss+xml" title="Articles from Distill">
+    <link rel="canonical" href="${data.url}">
+    <title>${data.title}</title>
+  `);
+
+  appendHtml(head, `
+    <!--  https://schema.org/Article -->
+    <meta property="article:published" itemprop="datePublished" content="${data.publishedDate}" />
+    <meta property="article:modified" itemprop="dateModified" content="${data.updatedDate}" />
+  `);
+  data.authors.forEach((a) => {
+    appendHtml(head, `
+      <meta property="article:author" content="${a.firstName} ${a.lastName}" />`)
+  });
+
+  appendHtml(head, `
+    <!--  https://developers.facebook.com/docs/sharing/webmasters#markup -->
+    <meta property="og:type" content="article"/>
+    <meta property="og:title" content="${data.title}"/>
+    <meta property="og:description" content="${data.description}">
+    <meta property="og:url" content="${data.url}"/>
+    <meta property="og:image" content="${data.url}/thumbnail.png"/>
+    <meta property="og:locale" content="en_US" />
+    <meta property="og:site_name" content="Distill" />
+  `);
+
+  appendHtml(head, `
+    <!--  https://dev.twitter.com/cards/types/summary -->
+    <meta name="twitter:card" content="summary_large_image">
+    <meta name="twitter:title" content="${data.title}">
+    <meta name="twitter:description" content="${data.description}">
+    <meta name="twitter:url" content="${data.url}">
+    <meta name="twitter:image" content="${data.url}/thumbnail.png">
+    <meta name="twitter:image:width" content="560">
+    <meta name="twitter:image:height" content="295">
+  `);
+
+  appendHtml(head, `
+    <!--  https://scholar.google.com/intl/en/scholar/inclusion.html#indexing -->
+    <meta name="citation_title" content="${data.title}">
+    <meta name="citation_publication_date" content="${data.publishedYear}/${data.publishedMonthPadded}/${data.publishedDayPadded}">
+    <meta name="citation_fulltext_html_url" content="${data.url}">
+    <meta name="citation_volume" content="${data.volume}">
+    <meta name="citation_issue" content="${data.issue}">
+    <meta name="citation_journal_title" content="${data.journal.name}">
+    <meta name="citation_journal_abbrev" content="${data.journal.nameAbbrev}"/>
+    <meta name="citation_firstpage" content="e${data.doiSuffix}"/>
+    <meta name="citation_doi" content="${data.doi}">
+    <meta name="citation_issn" content="${data.journal.issn}">
+    <meta name="citation_publisher" content="${data.journal.publisher}"/>
+  `);
+  data.authors.forEach((a) => {
+    appendHtml(head, `
+      <meta name="citation_author" content="${a.lastName}, ${a.firstName}" />
+      <meta name="citation_author_institution" content="${a.affiliation}"/>
+    `)
+  });
+
+  Object.keys(data.citations).forEach(key => {
+    console.log(key);
+    appendHtml(head, `
+      <meta name="citation_reference" content="${citation_meta_content(data.citations[key])}" >
+    `);
+  });
+}
+
+
+
+
+function appendHtml(el, html) {
+  el.innerHTML += html;
+}
+
+function citation_meta_content(ref){
+  var content = `citation_title=${ref.title};`;
+  ref.author.split(" and ").forEach(author => {
+    content += `citation_author=${author.trim()};`;
+  });
+  if ("journal" in ref){
+    content += `citation_journal_title=${ref.journal};`;
+  }
+  if ("volume" in ref) {
+      content += `citation_volume=${ref.volume};`;
+  }
+  if ("issue" in ref || "number" in ref){
+      content += `citation_number=${ref.issue || ref.number};`;
+  }
+  /*content += `citation_first_page=${};`;
+  content += `citation_publication_date=${};`;*/
+  return content;
+}
diff --git a/index.js b/index.js
index 2d576f1..d7de79b 100644
--- a/index.js
+++ b/index.js
@@ -1,4 +1,5 @@
 import citeData from "./components/cite-data";
+import meta from "./components/meta";
 import styles from "./components/styles";
 import header from "./components/header";
 import appendix from "./components/appendix";
@@ -6,24 +7,28 @@ import footer from "./components/footer";
 import citation from "./components/citation";
 import markdown from "./components/markdown";
 import code from "./components/code";
-
+import testData from "./test-data";
 
 
 function render(dom, data) {
   styles(dom, data);
   document.addEventListener("DOMContentLoaded", function(event) {
-    citeData(dom, data)
+    citeData(dom, data);
+    meta(dom, data);
     header(dom, data);
     appendix(dom, data);
     footer(dom, data);
     markdown(dom, data);
     code(dom, data);
     citation(dom, data);
+    console.log("final data:")
+    for (var k in data) {console.log("   ", k, ": ", data[k])}
   });
 }
 
+
 if(window.document) {
-  render(window.document, []);
+  render(window.document, testData);
 }
 
 export default render;
diff --git a/test-data.js b/test-data.js
new file mode 100644
index 0000000..027f553
--- /dev/null
+++ b/test-data.js
@@ -0,0 +1,46 @@
+export default {
+    "title": "Experiments in Handwriting with a Neural Network",
+    "description": "Several interactive visualizations of a generative model of handwriting. Some are fun, some are serious.",
+    "url": "http://distill.pub/2016/handwriting/",
+    "github": "https://github.com/distillpub/post--handwriting",
+    "firstPublished": "Tue Dec 6 2016 21:39:33 GMT-0700 (PDT)",
+    "lastPublished": "Tue Dec 6 2016 21:39:33 GMT-0700 (PDT)",
+    "authors": [
+      {
+        "firstName": "Shan",
+        "lastName": "Carter",
+        "personalURL": "http://shancarter.com",
+        "affiliation": "Google Brain",
+        "affiliationURL": "http://g.co/brain"
+      },
+      {
+        "firstName": "David",
+        "lastName": "Ha",
+        "personalURL": "https://github.com/hardmaru",
+        "affiliation": "Google Brain",
+        "affiliationURL": "http://g.co/brain"
+      },
+      {
+        "firstName": "Ian",
+        "lastName": "Johnson",
+        "personalURL": "https://github.com/enjalot",
+        "affiliation": "Google Cloud",
+        "affiliationURL": ""
+      },
+      {
+        "firstName": "Chris",
+        "lastName": "Olah",
+        "personalURL": "http://colah.github.io/",
+        "affiliation": "Google Brain",
+        "affiliationURL": "http://g.co/brain"
+      }
+    ],
+    journal: {
+      "title": "Distill",
+      "full_title": "Distill",
+      "abbrev_title": "Distill",
+      "url": "http://distill.pub",
+      "doi": "00.0000/dstl",
+      "issn": "0000-0000"
+    }
+  };