feat(comments): add Gitalk support (#351)

exampleSite/config.yaml

@@ -111,6 +111,13 @@ params:
             reactionsEnabled: 1
             emitMetadata: 0
 
+        gitalk:
+            owner: 
+            admin:  
+            repo: 
+            clientID: 
+            clientSecret: 
+
     widgets:
         enabled:
             - search

layouts/partials/comments/provider/gitalk.html

@@ -0,0 +1,30 @@
+{{- with .Site.Params.comments.gitalk -}}
+<div id="gitalk-container"></div>
+<link
+    rel="stylesheet"
+    href="https://cdn.jsdelivr.net/npm/gitalk@1.7.2/dist/gitalk.css"
+/>
+<script src="https://cdn.jsdelivr.net/npm/gitalk@1.7.2/dist/gitalk.min.js"></script>
+<script src="https://cdn.jsdelivr.net/npm/blueimp-md5@2.18.0/js/md5.min.js"></script>
+<script>
+    const gitalk = new Gitalk({
+        clientID: "{{- .clientID -}}",
+        clientSecret: "{{- .clientSecret -}}",
+        repo: "{{- .repo -}}",
+        owner: "{{- .owner -}}",
+        admin: ["{{- .admin -}}"],
+        distractionFreeMode: false, // Facebook-like distraction free mode
+        id: md5(location.pathname), // Max Location.pathname Legth:75  https://github.com/gitalk/gitalk/issues/102
+    });
+    (function () {
+        if (
+            ["localhost", "127.0.0.1"].indexOf(window.location.hostname) != -1
+        ) {
+            document.getElementById("gitalk-container").innerHTML =
+                "Gitalk comments not available by default when the website is previewed locally.";
+            return;
+        }
+        gitalk.render("gitalk-container");
+    })();
+</script>
+{{ end }}