Add: add Valine comment system support (#278)

* Add: add Valine comment system support

*  add complete configurations checking

_config.yml.example

@@ -50,7 +50,7 @@ search:
 
 # Comment
 comment:
-    disqus: hexo-theme-icarus # enter disqus shortname here
+    disqus:  # enter disqus shortname here
     duoshuo: # enter duoshuo shortname here
     youyan: # enter youyan uid here
     facebook: # enter true to enable
@@ -65,6 +65,14 @@ comment:
         client_id: #your client ID
         client_secret: #your client secret
     livere: # enter livere uid here
+    valine: # Valine Comment System https://github.com/xCss/Valine
+        on:  # enter true to enable
+        appId:  # enter the leancloud application appId here
+        appKey: # enter the leancloud application appKey here
+        notify: # enter true to enable <Mail notifier> https://github.com/xCss/Valine/wiki/Valine-%E8%AF%84%E8%AE%BA%E7%B3%BB%E7%BB%9F%E4%B8%AD%E7%9A%84%E9%82%AE%E4%BB%B6%E6%8F%90%E9%86%92%E8%AE%BE%E7%BD%AE
+        verify: # enter true to enable <Validation code>
+        placeholder: Just Do It # enter the comment box placeholder
+    
 
 # Share
 share: default # options: jiathis, bdshare, addtoany, default

layout/comment/index.ejs

@@ -13,6 +13,10 @@
         <section id="comments"><%- partial('comment/changyan') %></section>
     <% } else if (theme.comment.livere) { %>
         <section id="comments"><%- partial('comment/livere') %></section>
+    <% } else if (theme.comment.valine.on && 
+        theme.comment.valine.appId && 
+        theme.comment.valine.appKey) { %>
+        <section id="comments"><%- partial('comment/valine') %></section>
     <% } else if (theme.comment.gitment &&
         theme.comment.gitment.owner &&
         theme.comment.gitment.repo &&

layout/comment/scripts.ejs

@@ -18,4 +18,8 @@
     <%- partial('comment/gitment', { script: true }) %>
 <% } else if (theme.comment.livere) { %>
     <%- partial('comment/livere', { script: true }) %>
+<% } else if (theme.comment.valine.on && 
+        theme.comment.valine.appId && 
+        theme.comment.valine.appKey) { %>
+    <%- partial('comment/valine', { script: true }) %>
 <% } %>

layout/comment/valine.ejs

@@ -0,0 +1,16 @@
+<% if (typeof(script) !== 'undefined' && script) { %>
+    <script src="//cdn1.lncld.net/static/js/3.0.4/av-min.js"></script>
+    <script src="//cdn.jsdelivr.net/gh/xcss/valine@v1.1.6/dist/Valine.min.js"></script>
+    <script>
+        new Valine({
+            el: '#valine-thread' ,
+            notify:<%= theme.comment.valine.notify %>,
+            verify:<%= theme.comment.valine.verify %>,
+            app_id: '<%= theme.comment.valine.appId %>',
+            app_key: '<%= theme.comment.valine.appKey %>',
+            placeholder: '<%= theme.comment.valine.placeholder %>'
+        });
+    </script>
+<% } else { %>
+    <div id="valine-thread"></div>
+<% } %>