feat: 在綫聊天新增facebook洽談外掛程式 closed #918

feat: 添加artalk評論 closed #933
fix: 修復 開啟 archor 後， facebook評論加載不正確的 bug
fix: 修復 facebook 評論數無法加載的 bug

layout/includes/third-party/comments/artalk.pug

@@ -0,0 +1,45 @@
+- const { server, site } = theme.artalk
+
+script.
+  function addArtalkSource () {
+    const ele = document.createElement('link')
+    ele.rel = 'stylesheet'
+    ele.href= '!{theme.asset.artalk_css}'
+    document.getElementsByTagName('head')[0].appendChild(ele)
+  }
+
+  function loadArtalk () {
+    function initArtalk () {
+      window.artalkItem = new Artalk({
+        el: '#artalk-wrap',
+        server: '!{server}',
+        site: '!{site}',
+        pageKey: location.pathname,
+        darkMode: document.documentElement.getAttribute('data-theme') === 'dark',
+        countEl: '.artalk-count'
+      })
+    }
+
+    if (typeof window.artalkItem === 'object') setTimeout(()=>{initArtalk()},200)
+    else {
+      addArtalkSource()
+      typeof Artalk !== 'function' ? getScript('!{theme.asset.artalk_js}').then(initArtalk)
+                                  : setTimeout(()=>{initArtalk()},200)
+    }
+  }
+
+  document.getElementById('darkmode').addEventListener('click',()=> {
+    if (typeof window.artalkItem !== 'object') return
+    let isDark = document.documentElement.getAttribute('data-theme') === 'dark'
+    window.artalkItem.setDarkMode(!isDark)
+  })
+
+  
+  if ('!{theme.comments.use[0]}' === 'Artalk' || !!{theme.comments.lazyload}) {
+    if (!{theme.comments.lazyload}) btf.loadComment(document.getElementById('artalk-wrap'), loadArtalk)
+    else loadArtalk()
+  } else {
+    function loadOtherComment () {
+      loadArtalk()
+    }
+  }

layout/includes/third-party/comments/facebook_comments.pug

@@ -1,16 +1,26 @@
-#fb-root
+- const fbSDKVer = 'v14.0'
+- const fbSDK = theme.messenger.enable ? `https://connect.facebook.net/${theme.facebook_comments.lang}/sdk/xfbml.customerchat.js#xfbml=1&version=${fbSDKVer}` : `https://connect.facebook.net/${theme.facebook_comments.lang}/sdk.js#xfbml=1&version=${fbSDKVer}`
+
 script.
   function loadFBComment () {
-    var themeNow = document.documentElement.getAttribute('data-theme') === 'dark' ? 'dark' : 'light'
-    document.getElementsByClassName('fb-comments')[0].setAttribute('data-colorscheme',themeNow)
+    document.getElementById('fb-root') ? '' : document.body.insertAdjacentHTML('afterend', '<div id="fb-root"></div>')
 
-    if (typeof FB === 'object') FB.XFBML.parse()
+    const themeNow = document.documentElement.getAttribute('data-theme') === 'dark' ? 'dark' : 'light'
+    const $fbComment = document.getElementsByClassName('fb-comments')[0]
+    $fbComment.setAttribute('data-colorscheme',themeNow)
+    $fbComment.setAttribute('data-href', '!{urlNoIndex(page.permalink)}')
+
+    if (typeof FB === 'object') {
+      FB.XFBML.parse(document.getElementsByClassName('post-meta-commentcount')[0])
+      FB.XFBML.parse(document.getElementById('post-comment'))
+    }
     else {
       let ele = document.createElement('script')
-      ele.setAttribute('src','https://connect.facebook.net/!{theme.facebook_comments.lang}/sdk.js#xfbml=1&version=v13.0&appId=!{theme.facebook_comments.app_id}&autoLogAppEvents=1')
+      ele.setAttribute('src','!{fbSDK}')
       ele.setAttribute('async', 'true')
       ele.setAttribute('defer', 'true')
       ele.setAttribute('crossorigin', 'anonymous')
+      ele.setAttribute('id', 'facebook-jssdk')
       document.getElementById('fb-root').insertAdjacentElement('afterbegin',ele)
     }   
   }

layout/includes/third-party/comments/index.pug

@@ -42,3 +42,5 @@ hr
                         data-width="100%")
           when 'Remark42'
             #remark42
+          when 'Artalk'
+            #artalk-wrap

layout/includes/third-party/comments/js.pug

@@ -19,6 +19,8 @@ each name in theme.comments.use
     when 'Giscus'
       !=partial('includes/third-party/comments/giscus', {}, {cache: true})
     when 'Facebook Comments'
-      !=partial('includes/third-party/comments/facebook_comments', {}, {cache: true})
+      include ./facebook_comments.pug
     when 'Remark42'
       !=partial('includes/third-party/comments/remark42', {}, {cache: true})
+    when 'Artalk'
+      !=partial('includes/third-party/comments/artalk', {}, {cache: true})