🚧 #12256 填充侧边栏分类模型

src/main/java/org/b3log/solo/model/Common.java

@@ -20,7 +20,7 @@ package org.b3log.solo.model;
  *
  * @author <a href="http://88250.b3log.org">Liang Ding</a>
  * @author <a href="mailto:dongxu.wang@acm.org">Dongxu Wang</a>
- * @version 1.4.5.1, Nov 1, 2015
+ * @version 1.5.5.1, Apr 8, 2017
  * @since 0.3.1
  */
 public final class Common {
@@ -35,6 +35,11 @@ public final class Common {
      */
     public static final String MOST_USED_TAGS = "mostUsedTags";
 
+    /**
+     * Most used categories.
+     */
+    public static final String MOST_USED_CATEGORIES = "mostUsedCategories";
+
     /**
      * Most comment count articles.
      */
@@ -174,7 +179,7 @@ public final class Common {
      * Key of current user.
      */
     public static final String CURRENT_USER = "currentUser";
-    
+
     /**
      * Key of admin user.
      */

src/main/java/org/b3log/solo/repository/CategoryRepository.java

@@ -19,11 +19,13 @@ import org.b3log.latke.repository.Repository;
 import org.b3log.latke.repository.RepositoryException;
 import org.json.JSONObject;
 
+import java.util.List;
+
 /**
  * Category repository.
  *
  * @author <a href="http://88250.b3log.org">Liang Ding</a>
- * @version 1.1.0.1, Apr 1, 2017
+ * @version 1.2.0.1, Apr 8, 2017
  * @since 2.0.0
  */
 public interface CategoryRepository extends Repository {
@@ -80,4 +82,13 @@ public interface CategoryRepository extends Repository {
      * @throws RepositoryException repository exception
      */
     JSONObject getByOrder(final int order) throws RepositoryException;
+
+    /**
+     * Gets most used categories (contains the most tags) with the specified number.
+     *
+     * @param num the specified number
+     * @return a list of most used categories, returns an empty list if not found
+     * @throws RepositoryException repository exception
+     */
+    List<JSONObject> getMostUsedCategories(final int num) throws RepositoryException;
 }

src/main/java/org/b3log/solo/repository/impl/CategoryRepositoryImpl.java

@@ -18,16 +18,23 @@ package org.b3log.solo.repository.impl;
 import org.b3log.latke.Keys;
 import org.b3log.latke.repository.*;
 import org.b3log.latke.repository.annotation.Repository;
+import org.b3log.latke.util.CollectionUtils;
 import org.b3log.solo.model.Category;
+import org.b3log.solo.model.Tag;
 import org.b3log.solo.repository.CategoryRepository;
 import org.json.JSONArray;
 import org.json.JSONObject;
 
+import java.text.Collator;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+
 /**
  * Category repository.
  *
  * @author <a href="http://88250.b3log.org">Liang Ding</a>
- * @version 1.1.0.0, Apr 1, 2017
+ * @version 1.1.0.1, Apr 8, 2017
  * @since 2.0.0
  */
 @Repository
@@ -104,6 +111,20 @@ public class CategoryRepositoryImpl extends AbstractRepository implements Catego
         return array.optJSONObject(0);
     }
 
+    @Override
+    public List<JSONObject> getMostUsedCategories(final int num) throws RepositoryException {
+        final Query query = new Query().addSort(Category.CATEGORY_TAG_CNT, SortDirection.DESCENDING).
+                setCurrentPageNum(1).setPageSize(num).setPageCount(1);
+
+        final JSONObject result = get(query);
+        final JSONArray array = result.optJSONArray(Keys.RESULTS);
+
+        final List<JSONObject> ret = CollectionUtils.jsonArrayToList(array);
+        sortJSONCategoryList(ret);
+
+        return ret;
+    }
+
     @Override
     public JSONObject getUpper(final String id) throws RepositoryException {
         final JSONObject category = get(id);
@@ -153,4 +174,14 @@ public class CategoryRepositoryImpl extends AbstractRepository implements Catego
 
         return array.optJSONObject(0);
     }
+
+    private void sortJSONCategoryList(final List<JSONObject> tagJoList) {
+        Collections.sort(tagJoList, new Comparator<JSONObject>() {
+            @Override
+            public int compare(final JSONObject o1, final JSONObject o2) {
+                return Collator.getInstance(java.util.Locale.CHINA).
+                        compare(o1.optString(Tag.TAG_TITLE), o2.optString(Tag.TAG_TITLE));
+            }
+        });
+    }
 }

src/main/java/org/b3log/solo/service/ArticleQueryService.java

@@ -142,9 +142,8 @@ public class ArticleQueryService {
         pagination.put(Pagination.PAGINATION_PAGE_NUMS, (Object) Collections.emptyList());
 
         try {
-            final JSONArray categoryTags =
-                    categoryTagRepository.getByCategoryId(categoryId, 1, Integer.MAX_VALUE)
-                            .optJSONArray(Keys.RESULTS);
+            final JSONArray categoryTags = categoryTagRepository.getByCategoryId(
+                    categoryId, 1, Integer.MAX_VALUE).optJSONArray(Keys.RESULTS);
             if (categoryTags.length() <= 0) {
                 return ret;
             }