✨ #12670

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

@@ -17,7 +17,10 @@
  */
 package org.b3log.solo.model;
 
+import org.apache.commons.lang.StringUtils;
+import org.b3log.solo.util.Images;
 import org.b3log.solo.util.Markdowns;
+import org.json.JSONObject;
 import org.jsoup.Jsoup;
 import org.jsoup.safety.Whitelist;
 
@@ -25,7 +28,7 @@ import org.jsoup.safety.Whitelist;
  * This class defines all article model relevant keys.
  *
  * @author <a href="http://88250.b3log.org">Liang Ding</a>
- * @version 1.2.0.1, Feb 6, 2019
+ * @version 1.3.0.0, Feb 25, 2019
  * @since 0.3.1
  */
 public final class Article {
@@ -155,6 +158,11 @@ public final class Article {
      */
     public static final String ARTICLE_VIEW_PWD = "articleViewPwd";
 
+    /**
+     * Key of article image1 URL. https://github.com/b3log/solo/issues/12670
+     */
+    public static final String ARTICLE_IMG1_URL = "articleImg1URL";
+
     //// constants
 
     /**
@@ -162,12 +170,53 @@ public final class Article {
      */
     private static final int ARTICLE_ABSTRACT_LENGTH = 500;
 
+    /**
+     * Width of article first image.
+     */
+    public static final int ARTICLE_THUMB_IMG_WIDTH = 960;
+
+    /**
+     * Height of article first image.
+     */
+    public static final int ARTICLE_THUMB_IMG_HEIGHT = 540;
+
     /**
      * Private constructor.
      */
     private Article() {
     }
 
+    /**
+     * Gets the first image URL of the specified article.
+     *
+     * @param article the specified article
+     * @return the first image URL, returns {@code ""} if not found
+     */
+    public static String getArticleImg1URL(final JSONObject article) {
+        final String content = article.optString(Article.ARTICLE_CONTENT);
+        final String html = Markdowns.toHTML(content);
+        final String[] imgs = StringUtils.substringsBetween(html, "<img", ">");
+        if (null == imgs || 0 == imgs.length) {
+            return Images.imageSize(Images.randImage(), ARTICLE_THUMB_IMG_WIDTH, ARTICLE_THUMB_IMG_HEIGHT);
+        }
+
+        String ret = null;
+        for (final String img : imgs) {
+            ret = StringUtils.substringBetween(img, "src=\"", "\"");
+            if (!StringUtils.containsIgnoreCase(ret, ".ico")) {
+                break;
+            }
+        }
+
+        if (StringUtils.isBlank(ret)) {
+            return Images.imageSize(Images.randImage(), ARTICLE_THUMB_IMG_WIDTH, ARTICLE_THUMB_IMG_HEIGHT);
+        }
+
+        ret = Images.imageSize(ret, ARTICLE_THUMB_IMG_WIDTH, ARTICLE_THUMB_IMG_HEIGHT);
+
+        return ret;
+    }
+
     /**
      * Gets the abstract of the specified content.
      *

src/main/java/org/b3log/solo/processor/console/ArticleConsole.java

@@ -134,13 +134,13 @@ public class ArticleConsole {
         // original: 1920*1080
 
         final String wStr = context.param("w");
-        int w = 960;
+        int w = Article.ARTICLE_THUMB_IMG_WIDTH;
         if (Strings.isNumeric(wStr)) {
             w = Integer.valueOf(wStr);
         }
         final int width = w;
         final String hStr = context.param("h");
-        int h = 540;
+        int h = Article.ARTICLE_THUMB_IMG_HEIGHT;
         if (Strings.isNumeric(hStr)) {
             h = Integer.valueOf(hStr);
         }

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

@@ -448,6 +448,9 @@ public class ArticleMgmtService {
 
             article.put(Article.ARTICLE_RANDOM_DOUBLE, Math.random());
 
+            final String articleImg1URL = getArticleImg1URL(article);
+            article.put(ARTICLE_IMG1_URL, articleImg1URL);
+
             final boolean postToCommunity = article.optBoolean(Common.POST_TO_COMMUNITY, true);
             article.remove(Common.POST_TO_COMMUNITY); // Do not persist this property
 

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

@@ -257,7 +257,7 @@ public class InitService {
         final JSONObject article = new JSONObject();
 
         article.put(Article.ARTICLE_TITLE, langPropsService.get("helloWorld.title"));
-        final String content = "![](" + Images.imageSize(Images.randImage(), 960, 540) + ") \n\n" +
+        final String content = "![](" + Images.imageSize(Images.randImage(), Article.ARTICLE_THUMB_IMG_WIDTH, Article.ARTICLE_THUMB_IMG_HEIGHT) + ") \n\n" +
                 langPropsService.get("helloWorld.content");
 
         article.put(Article.ARTICLE_ABSTRACT, content);
@@ -278,6 +278,8 @@ public class InitService {
         article.put(Article.ARTICLE_AUTHOR_ID, admin.optString(Keys.OBJECT_ID));
         article.put(Article.ARTICLE_COMMENTABLE, true);
         article.put(Article.ARTICLE_VIEW_PWD, "");
+        final String articleImg1URL = Article.getArticleImg1URL(article);
+        article.put(Article.ARTICLE_IMG1_URL, articleImg1URL);
 
         final String articleId = addHelloWorldArticle(article);
 

src/main/resources/repository.json

@@ -529,6 +529,12 @@
           "description": "文章浏览密码，留空为不设置访问密码",
           "type": "String",
           "legnth": 255
+        },
+        {
+          "name": "articleImg1URL",
+          "type": "String",
+          "length": 255,
+          "description": "文章首图地址"
         }
       ]
     },