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2012/01/14

Blggerのコメント欄をツリー形式で返信可能にするカスタマイズ Tips

2012/01/11より、新規でBloggerのテンプレートを作成すると標準のコメント欄に"返信"、"Reply"といったスレッド表示式のコメントができるようになりました。これにより、どのコメントに対する返信か分かり易くなリ、DISQUSやLivefyreの機能をdefaultでも利用可能となりました。

今回は既存のテンプレートのまま、新しいコメントシステムに変更する方法を紹介いたします。


Bloggerテンプレートの保存・コメント設定の変更・確認


1.テンプレートを編集する前に念のためバックアップを取っておきます。


テンプレート>バックアップ/復元>テンプレートをすべてダウンロード

2.ブログの設定画面で以下の2点を確認します。

  1. 設定>投稿とコメント
    コメントの場所:埋め込み
  2. 設定>その他
    ブログ フィードの許可:完全

テンプレートの修正


テンプレート>HTMLの編集>ウィジェットのテンプレートを展開

変更箇所1

Ctrl+Fで以下の部分を検索
<b:if cond='data:blog.pageType == &quot;static_page&quot;'>

該当箇所が2つ検索されると思います。
        <b:if cond='data:blog.pageType == &quot;static_page&quot;'>
          <b:include data='post' name='comments'/>
        </b:if>
        <b:if cond='data:blog.pageType == &quot;item&quot;'>
          <b:include data='post' name='comments'/>
        </b:if>
2箇所を以下に変更
        <b:if cond='data:blog.pageType == &quot;static_page&quot;'>
          <b:if cond='data:post.showThreadedComments'>
            <b:include data='post' name='threaded_comments'/>
          <b:else/>
            <b:include data='post' name='comments'/>
          </b:if>
        </b:if>
        <b:if cond='data:blog.pageType == &quot;item&quot;'>
          <b:if cond='data:post.showThreadedComments'>
            <b:include data='post' name='threaded_comments'/>
          <b:else/>
            <b:include data='post' name='comments'/>
          </b:if>
        </b:if>

変更箇所2

Ctrl+Fで以下の部分を検索
<b:includable id='threaded_comment_js' var='post'>
<b:includable id='threaded_comment_js' var='post'>
  <script defer='defer' expr:src='data:post.commentSrc' type='text/javascript'/>

  <script type='text/javascript'>
    (function() {
      var items = <data:post.commentJso/>;
      var msgs = <data:post.commentMsgs/>;
      var postId = &#39;<data:post.id/>&#39;;
      var feed = &#39;<data:post.commentFeed/>&#39;;
      var authorName = &#39;<data:post.author/>&#39;;
      var authorUrl = &#39;<data:post.authorUrl/>&#39;;
      var blogId = &#39;<data:top.id/>&#39;;
      var baseUri = &#39;<data:post.commentBase/>&#39;;
      var maxThreadDepth = &#39;<data:post.commentMaxThreadDepth/>&#39;;

// <![CDATA[
      feed += '?alt=json&v=2&orderby=published&reverse=false&max-results=50';
      var cursor = null;
      if (items && items.length > 0) {
        cursor = parseInt(items[items.length - 1].timestamp) + 1;
      }

      var bodyFromEntry = function(entry) {
        if (entry.gd$extendedProperty) {
          for (var k in entry.gd$extendedProperty) {
            if (entry.gd$extendedProperty[k].name == 'blogger.contentRemoved') {
              return '<span class="deleted-comment">' + entry.content.$t + '</span>';
            }
          }
        }
        return entry.content.$t;
      }

      var parse = function(data) {
        cursor = null;
        var comments = [];
        if (data && data.feed && data.feed.entry) {
          for (var i = 0, entry; entry = data.feed.entry[i]; i++) {
            var comment = {};
            // comment ID, parsed out of the original id format
            var id = /blog-(\d+).post-(\d+)/.exec(entry.id.$t);
            comment.id = id ? id[2] : null;
            comment.body = bodyFromEntry(entry);
            comment.timestamp = Date.parse(entry.published.$t) + '';
            if (entry.author && entry.author.constructor === Array) {
              var auth = entry.author[0];
              if (auth) {
                comment.author = {
                  name: (auth.name ? auth.name.$t : undefined),
                  profileUrl: (auth.uri ? auth.uri.$t : undefined),
                  avatarUrl: (auth.gd$image ? auth.gd$image.src : undefined)
                };
              }
            }
            if (entry.link) {
              if (entry.link[2]) {
                comment.link = comment.permalink = entry.link[2].href;
              }
              if (entry.link[3]) {
                var pid = /.*comments\/default\/(\d+)\?.*/.exec(entry.link[3].href);
                if (pid && pid[1]) {
                  comment.parentId = pid[1];
                }
              }
            }
            comment.deleteclass = 'item-control blog-admin';
            if (entry.gd$extendedProperty) {
              for (var k in entry.gd$extendedProperty) {
                console.log(entry.gd$extendedProperty[k].name + ' - ' + entry.gd$extendedProperty[k].value);
                if (entry.gd$extendedProperty[k].name == 'blogger.itemClass') {
                  comment.deleteclass += ' ' + entry.gd$extendedProperty[k].value;
                }
              }
            }
            comments.push(comment);
          }
        }
        return comments;
      };

      var paginator = function(callback) {
        if (hasMore()) {
          var url = feed;
          if (cursor) {
            url += '&published-min=' + new Date(cursor).toISOString();
          }
          window.bloggercomments = function(data) {
            var parsed = parse(data);
            cursor = parsed.length < 50 ? null
                : parseInt(parsed[parsed.length - 1].timestamp) + 1
            callback(parsed);
            window.bloggercomments = null;
          }
          url += '&callback=bloggercomments';
          var script = document.createElement('script');
          script.type = 'text/javascript';
          script.src = url;
          document.getElementsByTagName('head')[0].appendChild(script);
        }
      };
      var hasMore = function() {
        return !!cursor;
      };
      var getMeta = function(key, comment) {
        if ('iswriter' == key) {
          var matches = !!comment.author
              && comment.author.name == authorName
              && comment.author.profileUrl == authorUrl;
          return matches ? 'true' : '';
        } else if ('deletelink' == key) {
          return baseUri + '/delete-comment.g?blogID=' + blogId + '&postID=' + comment.id;
        } else if ('deleteclass' == key) {
          return comment.deleteclass;
        }
        return '';
      };

      var replybox = null;
      var replyUrlParts = null;
      var replyParent = undefined;

      var onReply = function(commentId, domId) {
        if (replybox == null) {
          // lazily cache replybox, and adjust to suit this style:
          replybox = document.getElementById('comment-editor');
          if (replybox != null) {
            replybox.height = '250px';
            replybox.style.display = 'block';
            replyUrlParts = replybox.src.split('#');
          }
        }
        if (replybox && (commentId !== replyParent)) {
          document.getElementById(domId).insertBefore(replybox, null);
          replybox.src = replyUrlParts[0]
              + (commentId ? '&parentID=' + commentId : '')
              + '#' + replyUrlParts[1];
          replyParent = commentId;
        }
      };

      var tok = 'comment-form_';
      var hash = window.location.hash || '';
      var startThread = hash.indexOf(tok) == 1 ? hash.substring(tok.length + 1) : undefined;

      // Configure commenting API:
      var configJso = {
        'maxDepth': maxThreadDepth
      };
      var provider = {
        'id': postId,
        'data': items,
        'loadNext': paginator,
        'hasMore': hasMore,
        'getMeta': getMeta,
        'onReply': onReply,
        'rendered': true,
        'initReplyThread': startThread,
        'config': configJso,
        'messages': msgs
      };

      var render = function() {
        if (window.goog && window.goog.comments) {
          var holder = document.getElementById('comment-holder');
          window.goog.comments.render(holder, provider);
        }
      };

      // render now, or queue to render when library loads:
      if (window.goog && window.goog.comments) {
        render();
      } else {
        window.goog = window.goog || {};
        window.goog.comments = window.goog.comments || {};
        window.goog.comments.loadQueue = window.goog.comments.loadQueue || [];
        window.goog.comments.loadQueue.push(render);
      }
    })();
// ]]>
  </script>
</b:includable>
以下に変更
<b:includable id='threaded_comment_js' var='post'>
  <script async='async' expr:src='data:post.commentSrc' type='text/javascript'/>

  <script type='text/javascript'>
    (function() {
      var items = <data:post.commentJso/>;
      var msgs = <data:post.commentMsgs/>;
      var config = <data:post.commentConfig/>;

// <![CDATA[
      var cursor = null;
      if (items && items.length > 0) {
        cursor = parseInt(items[items.length - 1].timestamp) + 1;
      }

      var bodyFromEntry = function(entry) {
        if (entry.gd$extendedProperty) {
          for (var k in entry.gd$extendedProperty) {
            if (entry.gd$extendedProperty[k].name == 'blogger.contentRemoved') {
              return '<span class="deleted-comment">' + entry.content.$t + '</span>';
            }
          }
        }
        return entry.content.$t;
      }

      var parse = function(data) {
        cursor = null;
        var comments = [];
        if (data && data.feed && data.feed.entry) {
          for (var i = 0, entry; entry = data.feed.entry[i]; i++) {
            var comment = {};
            // comment ID, parsed out of the original id format
            var id = /blog-(\d+).post-(\d+)/.exec(entry.id.$t);
            comment.id = id ? id[2] : null;
            comment.body = bodyFromEntry(entry);
            comment.timestamp = Date.parse(entry.published.$t) + '';
            if (entry.author && entry.author.constructor === Array) {
              var auth = entry.author[0];
              if (auth) {
                comment.author = {
                  name: (auth.name ? auth.name.$t : undefined),
                  profileUrl: (auth.uri ? auth.uri.$t : undefined),
                  avatarUrl: (auth.gd$image ? auth.gd$image.src : undefined)
                };
              }
            }
            if (entry.link) {
              if (entry.link[2]) {
                comment.link = comment.permalink = entry.link[2].href;
              }
              if (entry.link[3]) {
                var pid = /.*comments\/default\/(\d+)\?.*/.exec(entry.link[3].href);
                if (pid && pid[1]) {
                  comment.parentId = pid[1];
                }
              }
            }
            comment.deleteclass = 'item-control blog-admin';
            if (entry.gd$extendedProperty) {
              for (var k in entry.gd$extendedProperty) {
                if (entry.gd$extendedProperty[k].name == 'blogger.itemClass') {
                  comment.deleteclass += ' ' + entry.gd$extendedProperty[k].value;
                }
              }
            }
            comments.push(comment);
          }
        }
        return comments;
      };

      var paginator = function(callback) {
        if (hasMore()) {
          var url = config.feed + '?alt=json&v=2&orderby=published&reverse=false&max-results=50';
          if (cursor) {
            url += '&published-min=' + new Date(cursor).toISOString();
          }
          window.bloggercomments = function(data) {
            var parsed = parse(data);
            cursor = parsed.length < 50 ? null
                : parseInt(parsed[parsed.length - 1].timestamp) + 1
            callback(parsed);
            window.bloggercomments = null;
          }
          url += '&callback=bloggercomments';
          var script = document.createElement('script');
          script.type = 'text/javascript';
          script.src = url;
          document.getElementsByTagName('head')[0].appendChild(script);
        }
      };
      var hasMore = function() {
        return !!cursor;
      };
      var getMeta = function(key, comment) {
        if ('iswriter' == key) {
          var matches = !!comment.author
              && comment.author.name == config.authorName
              && comment.author.profileUrl == config.authorUrl;
          return matches ? 'true' : '';
        } else if ('deletelink' == key) {
          return config.baseUri + '/delete-comment.g?blogID='
               + config.blogId + '&postID=' + comment.id;
        } else if ('deleteclass' == key) {
          return comment.deleteclass;
        }
        return '';
      };

      var replybox = null;
      var replyUrlParts = null;
      var replyParent = undefined;

      var onReply = function(commentId, domId) {
        if (replybox == null) {
          // lazily cache replybox, and adjust to suit this style:
          replybox = document.getElementById('comment-editor');
          if (replybox != null) {
            replybox.height = '250px';
            replybox.style.display = 'block';
            replyUrlParts = replybox.src.split('#');
          }
        }
        if (replybox && (commentId !== replyParent)) {
          document.getElementById(domId).insertBefore(replybox, null);
          replybox.src = replyUrlParts[0]
              + (commentId ? '&parentID=' + commentId : '')
              + '#' + replyUrlParts[1];
          replyParent = commentId;
        }
      };

      var hash = (window.location.hash || '#').substring(1);
      var startThread, targetComment;
      if (/^comment-form_/.test(hash)) {
        startThread = hash.substring('comment-form_'.length);
      } else if (/^c[0-9]+$/.test(hash)) {
        targetComment = hash.substring(1);
      }

      // Configure commenting API:
      var configJso = {
        'maxDepth': config.maxThreadDepth
      };
      var provider = {
        'id': config.postId,
        'data': items,
        'loadNext': paginator,
        'hasMore': hasMore,
        'getMeta': getMeta,
        'onReply': onReply,
        'rendered': true,
        'initComment': targetComment,
        'initReplyThread': startThread,
        'config': configJso,
        'messages': msgs
      };

      var render = function() {
        if (window.goog && window.goog.comments) {
          var holder = document.getElementById('comment-holder');
          window.goog.comments.render(holder, provider);
        }
      };

      // render now, or queue to render when library loads:
      if (window.goog && window.goog.comments) {
        render();
      } else {
        window.goog = window.goog || {};
        window.goog.comments = window.goog.comments || {};
        window.goog.comments.loadQueue = window.goog.comments.loadQueue || [];
        window.goog.comments.loadQueue.push(render);
      }
    })();
// ]]>
  </script>
</b:includable>

CSSの追加


Ctrl+Fで以下の部分を検索
#comments .comment-author:first-child

この部分の前に以下のCSSを挿入する(headタグ内なら他でもOKですが分かりやすいため)
/* Comments
----------------------------------------------- */
//Blogオーナーのコメント時マークを付ける
.comments .comments-content .icon.blog-author {
  background-repeat: no-repeat;
  background-image: url(data:image/png;base64,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);
}

//50件以上のコメントを表示するときのスタイル
.comments .comments-content .loadmore a {
  border-top: 1px solid #CCCCCC;
  border-bottom: 1px solid #CCCCCC;
}

//Reply部分の背景色
.comments .comment-thread.inline-thread {
  background-color: #E9E9E9;
}

//コメント最下部のボーダー
.comments .continue {
  border-top: 2px solid #CCCCCC;
}
CSSは適宜お好みで調整して下さい。

テンプレートを保存すると設置完了です。



※2012/03/04現在、表示される時刻(タイムゾーン)が17時間遅く表示されてしまう問題があるので、従来のもので使用したほうが良いかもしれません。

テンプレートの修正の変更箇所1を元に戻すと従来のものになります。

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