新增

ftb/src/main/java/ftb/test/controller/CultureClockInController.java

@@ -86,6 +86,28 @@ public class CultureClockInController {
         return ActionResult.success(new Base64ImageVo(pair.getLeft(), base64Img));
     }
 
+    /**
+     * 打卡分享 - 获取随机图片[base64]
+     * @param lastCombo 上次组合
+     * @param response HttpServletResponse
+     */
+    @GetMapping(value = "/random-preview/create")
+    public ActionResult<Base64ImageVo> getRandomPicPreviewBase64(@RequestParam(value = "lastCombo", required = false) String lastCombo, HttpServletRequest request, HttpServletResponse response) throws Exception {
+
+        MutablePair<String, BufferedImage> pair = cultureClockInService.getRandomPicPreview(lastCombo, requestUrl);
+        if (pair == null || pair.getRight() == null) {
+            throw new Exception("获取图片失败，请重试");
+        }
+        byte[] bytes;
+        try (ByteArrayOutputStream output = new ByteArrayOutputStream()) {
+            ImageIO.write(pair.getRight(), "png", output);
+            bytes = output.toByteArray();
+        }
+        String base64 = Base64.getEncoder().encodeToString(bytes);
+        String base64Img = "data:image/png;base64," + base64;
+        return ActionResult.success(new Base64ImageVo(pair.getLeft(), base64Img));
+    }
+
     /**
      * 打卡分享 - 打卡
      * @param currentCombo 当前组合