docs: Add new Giscus comment system

Author: ericdallo

docs/blog/2020/7.0-release.md

@@ -1,5 +1,5 @@
 ---
-disqus: emacs-lsp 
+template: comment.html 
 ---
 
 # 7.0 Release

docs/manual-language-docs/lsp-rust-analyzer.md

@@ -1,6 +1,6 @@
 ---
 author: yyoncho
-disqus: emacs-lsp
+template: comment.html
 root_file: docs/manual-language-docs/lsp-rust-analyzer.md
 ---
 ## Server note

docs/manual-language-docs/lsp-terraform-ls.md

@@ -1,6 +1,6 @@
 ---
 author: psibi
-disqus: emacs-lsp
+template: comment.html
 root_file: docs/manual-language-docs/lsp-terraform-ls.md
 ---
 

docs/tutorials/CPP-guide.md

@@ -1,5 +1,5 @@
 ---
-disqus: emacs-lsp
+template: comment.html
 root_file: docs/tutorials/CPP-guide.md
 ---
 

docs/tutorials/clojure-guide.md

@@ -1,6 +1,6 @@
 ---
 author: ericdallo
-disqus: emacs-lsp
+template: comment.html
 root_file: docs/tutorials/clojure-guide.md
 ---
 

docs/tutorials/debugging-clojure-script.md

@@ -1,6 +1,6 @@
 ---
 author: yyoncho
-disqus: emacs-lsp
+template: comment.html
 root_file: docs/tutorials/debugging-clojure-script.md
 ---
 # Debugging ClojureScript using dap-mode

docs/tutorials/how-to-turn-off.md

@@ -1,5 +1,5 @@
 ---
-disqus: emacs-lsp
+template: comment.html
 root_file: docs/tutorials/how-to-turn-off.md
 ---
 

docs/tutorials/php-guide.md

@@ -1,5 +1,5 @@
 ---
-disqus: emacs-lsp
+template: comment.html
 author: elken
 root_file: docs/tutorials/php-guide.md
 ---

docs/tutorials/reactjs-tutorial.md

@@ -6,7 +6,7 @@ ContentId: 2dd2eeff-2eb3-4a0c-a59d-ea9a0b10c468
 PageTitle: React JavaScript Tutorial in Emacs
 DateApproved: 9/10/2020
 MetaDescription: React JavaScript tutorial showing IntelliSense, debugging, and code navigation support in the Emacs editor.
-disqus: emacs-lsp
+template: comment.html
 root_file: docs/tutorials/reactjs-tutorial.md
 ---
 # Using React in Emacs

overrides/comment.html

@@ -0,0 +1,52 @@
+{% extends "base.html" %}
+
+{% block content %}
+  {{ super() }}
+
+  <!-- Giscus -->
+  <h2 id="__comments">{{ lang.t("meta.comments") }}</h2>
+  <!-- Replace with generated snippet -->
+  <script src="https://giscus.app/client.js"
+          data-repo="emacs-lsp/lsp-mode"
+          data-repo-id="MDEwOlJlcG9zaXRvcnk3NTQxNTE2OQ=="
+          data-category="Giscus"
+          data-category-id="DIC_kwDOBH6-gc4CPloy"
+          data-mapping="title"
+          data-reactions-enabled="1"
+          data-emit-metadata="0"
+          data-input-position="bottom"
+          data-theme="light"
+          data-lang="en"
+          data-loading="lazy"
+          crossorigin="anonymous"
+          async>
+  </script>
+
+  <!-- Reload on palette change -->
+  <script>
+    var palette = __md_get("__palette")
+    if (palette && typeof palette.color === "object")
+      if (palette.color.scheme === "slate") {
+        var giscus = document.querySelector("script[src*=giscus]")
+        giscus.setAttribute("data-theme", "dark")
+      }
+
+    /* Register event handlers after documented loaded */
+    document.addEventListener("DOMContentLoaded", function() {
+      var ref = document.querySelector("[data-md-component=palette]")
+      ref.addEventListener("change", function() {
+        var palette = __md_get("__palette")
+        if (palette && typeof palette.color === "object") {
+          var theme = palette.color.scheme === "slate" ? "dark" : "light"
+
+          /* Instruct Giscus to change theme */
+          var frame = document.querySelector(".giscus-frame")
+          frame.contentWindow.postMessage(
+            { giscus: { setConfig: { theme } } },
+            "https://giscus.app"
+          )
+        }
+      })
+    })
+  </script>
+{% endblock %}