feat: Optimized word count for non-Chinese articles (#1865)

* feat: word count optimization

Now it can accurately identify the number of words in English articles and mixed language articles with character fieds.

* checkstyle

* delete field charCount

* fix typo and add some complex unit test

* refine unit test

* uniform word count

* fix style

src/main/java/run/halo/app/model/entity/BasePost.java

@@ -143,7 +143,7 @@ public class BasePost extends BaseEntity {
     private Integer topPriority;
 
     /**
-     * Likes
+     * Likes.
      */
     @Column(name = "likes")
     @ColumnDefault("0")
@@ -169,7 +169,7 @@ public class BasePost extends BaseEntity {
     private String metaDescription;
 
     /**
-     * Content word count
+     * Content word count.
      */
     @Column(name = "word_count")
     @ColumnDefault("0")
@@ -188,6 +188,7 @@ public class BasePost extends BaseEntity {
     @Transient
     private PatchedContent content;
 
+
     @Override
     public void prePersist() {
         super.prePersist();
@@ -243,6 +244,7 @@ public class BasePost extends BaseEntity {
         if (version == null || version < 0) {
             version = 1;
         }
+
         // Clear the value of the deprecated attributes
         this.originalContent = "";
         this.formatContent = "";

src/main/java/run/halo/app/service/impl/BasePostServiceImpl.java

@@ -64,6 +64,10 @@ public abstract class BasePostServiceImpl<POST extends BasePost>
 
     private static final Pattern BLANK_PATTERN = Pattern.compile("\\s");
 
+    private static final String CHINESE_REGEX = "[^\\x00-\\xff]";
+
+    private static final String PUNCTUATION_REGEX = "[\\p{P}\\p{S}\\p{Z}\\s]+";
+
     public BasePostServiceImpl(BasePostRepository<POST> basePostRepository,
         OptionService optionService,
         ContentService contentService,
@@ -301,7 +305,6 @@ public abstract class BasePostServiceImpl<POST extends BasePost>
         PatchedContent postContent = post.getContent();
         // word count stat
         post.setWordCount(htmlFormatWordCount(postContent.getContent()));
-
         POST savedPost;
         // Create or update post
         if (ServiceUtils.isEmptyId(post.getId())) {
@@ -484,7 +487,7 @@ public abstract class BasePostServiceImpl<POST extends BasePost>
         }
     }
 
-    // CS304 issue link : https://github.com/halo-dev/halo/issues/1224
+    // CS304 issue link : https://github.com/halo-dev/halo/issues/1759
 
     /**
      * @param htmlContent the markdown style content
@@ -498,6 +501,39 @@ public abstract class BasePostServiceImpl<POST extends BasePost>
 
         String cleanContent = HaloUtils.cleanHtmlTag(htmlContent);
 
+        String tempString = cleanContent.replaceAll(CHINESE_REGEX, "");
+
+        String otherString = cleanContent.replaceAll(CHINESE_REGEX, " ");
+
+        int chineseWordCount = cleanContent.length() - tempString.length();
+
+        String[] otherWords = otherString.split(PUNCTUATION_REGEX);
+
+        int otherWordLength = otherWords.length;
+
+        if (otherWordLength > 0 && otherWords[0].length() == 0) {
+            otherWordLength--;
+        }
+
+        if (otherWords.length > 1 && otherWords[otherWords.length - 1].length() == 0) {
+            otherWordLength--;
+        }
+
+        return chineseWordCount + otherWordLength;
+    }
+
+    /**
+     * @param htmlContent the markdown style content
+     * @return character count except space and line separator
+     */
+
+    public static long htmlFormatCharacterCount(String htmlContent) {
+        if (htmlContent == null) {
+            return 0;
+        }
+
+        String cleanContent = HaloUtils.cleanHtmlTag(htmlContent);
+
         Matcher matcher = BLANK_PATTERN.matcher(cleanContent);
 
         int count = 0;

src/test/java/run/halo/app/service/impl/HTMLWordCountTest.java

@@ -59,6 +59,20 @@ public class HTMLWordCountTest {
 
     String emptyString = "";
 
+    String englishString = "I have a red apple";
+
+    String hybridString = "I have a red apple哈哈";
+
+
+    String complexText2 = "Hi，Jessica！这个project的schedule有些问题。";
+
+    String complexText3 = "The company had a meeting yesterday。Why did you ask for leave？";
+
+    String complexText4 = "这是一个句子，但是只有中文。";
+
+    String complexText5 =
+        "The wind and the moon are all beautiful, love and hate are all romantic.";
+
     @Test
     void pictureTest() {
         assertEquals("图片字数测试".length(),
@@ -128,4 +142,42 @@ public class HTMLWordCountTest {
         assertEquals(0,
             BasePostServiceImpl.htmlFormatWordCount(MarkdownUtils.renderHtml(emptyString)));
     }
-}
+
+    @Test
+    void englishTest() {
+        assertEquals(5,
+            BasePostServiceImpl.htmlFormatWordCount(MarkdownUtils.renderHtml(englishString)));
+    }
+
+    @Test
+    void hybridTest() {
+        assertEquals(7,
+            BasePostServiceImpl.htmlFormatWordCount(MarkdownUtils.renderHtml(hybridString)));
+    }
+
+    @Test
+    void englishCharacterTest() {
+        assertEquals(14,
+            BasePostServiceImpl.htmlFormatCharacterCount(MarkdownUtils.renderHtml(englishString)));
+    }
+
+    @Test
+    void hybridCharacterTest() {
+        assertEquals(16,
+            BasePostServiceImpl.htmlFormatCharacterCount(MarkdownUtils.renderHtml(hybridString)));
+    }
+
+    @Test
+    void moreComplexTest() {
+        assertEquals(14,
+            BasePostServiceImpl.htmlFormatWordCount(MarkdownUtils.renderHtml(complexText2)));
+        assertEquals(14,
+            BasePostServiceImpl.htmlFormatWordCount(MarkdownUtils.renderHtml(complexText3)));
+        assertEquals(14,
+            BasePostServiceImpl.htmlFormatWordCount(MarkdownUtils.renderHtml(complexText4)));
+        assertEquals(14,
+            BasePostServiceImpl.htmlFormatWordCount(MarkdownUtils.renderHtml(complexText5)));
+    }
+
+
+}