新增 [屏蔽关键词] 功能对评论的支持 (#59)

* 添加屏蔽评论功能

* 支持通知等其他地方的评论屏蔽

Zhihu-Enhanced.user.js

@@ -483,6 +483,9 @@ function blockKeywords(type) {
         case 'search':
             blockKeywords_search();
             break;
+        case 'comment':
+            blockKeywords_comment();
+            break;
     }
 
     function blockKeywords_index_() {
@@ -630,6 +633,52 @@ function blockKeywords(type) {
         }
         document.addEventListener('DOMNodeInserted', blockKeywords); // 监听插入事件
     }
+
+
+    function blockKeywords_comment() {
+        function filterComment(comment) {
+            let content = comment.querySelector('.RichText');
+            let texts = [content.textContent.toLowerCase()];
+            for (let i = 0; i < content.children.length; i++) {
+                let emoticonValue = content.children[i].getAttribute('data-zhihu-emoticon');
+                if (emoticonValue) {
+                    texts.push(emoticonValue)
+                }
+            }
+
+            let keywords = menu_value('menu_customBlockKeywords');
+            for (const text of texts) {
+                for (const keyword of keywords) { // 遍历关键词黑名单
+                    if (text.indexOf(keyword.toLowerCase()) > -1) { // 找到就删除该信息流
+                        console.log(text);
+                        content.textContent = '[已屏蔽]';
+                        break;
+                    }
+                }
+            }
+        }
+        function blockKeywords(node) {
+            switch (node.className) {
+                case 'NestComment--rootComment':
+                case 'NestComment--child':
+                case 'CommentItemV2':
+                    filterComment(node);
+                    break;
+            }
+        }
+
+        const callback = (mutationsList, observer) => {
+            for (const mutation of mutationsList) {
+                for (const target of mutation.addedNodes) {
+                    for (const node of target.querySelectorAll('*')) {
+                        blockKeywords(node);
+                    }
+                }
+            }
+        };
+        const observer = new MutationObserver(callback);
+        observer.observe(document, { childList: true, subtree: true });
+    }
 }
 
 
@@ -992,12 +1041,12 @@ function questionInvitation(){
     });
 }
 
-
 (function() {
     addEventListener_DOMNodeInserted(); //                                 监听 网页插入元素 事件
     questionInvitation(); //                                               默认折叠邀请
     setInterval(originalPic,100); //                                       默认高清原图
     if (menu_value('menu_directLink')) setInterval(directLink, 100); //    默认站外直链
+    blockKeywords('comment'); //                                           评论屏蔽指定关键词
 
     if (window.location.href.indexOf("question") > -1) { //       回答页 //
         if (window.location.href.indexOf("waiting") == -1) {