优化imgs_infos接口。

src/service/imgs_infos.py

@@ -46,60 +46,17 @@ def imgs_infos(
     if len(imgs) != len(timelines):
         raise ValueError(f"imgs length ({len(imgs)}) does not match timelines length ({len(timelines)})")
     
-    # 处理可能包含多个动画的参数，用 | 分隔
-    in_animations = []
-    if in_animation and isinstance(in_animation, str):
-        in_animations = [anim.strip() for anim in in_animation.split('|') if anim.strip()]
-    
-    out_animations = []
-    if out_animation and isinstance(out_animation, str):
-        out_animations = [anim.strip() for anim in out_animation.split('|') if anim.strip()]
-    
-    loop_animations = []
-    if loop_animation and isinstance(loop_animation, str):
-        loop_animations = [anim.strip() for anim in loop_animation.split('|') if anim.strip()]
+    # 解析动画参数
+    parsed_animations = _parse_animation_params(in_animation, out_animation, loop_animation, transition)
+    in_animations, out_animations, loop_animations, transition_animations = parsed_animations
     
     # 构建图片信息列表
     infos = []
     for i, (img_url, timeline) in enumerate(zip(imgs, timelines)):
-        info = {
-            "image_url": img_url,
-            "start": timeline["start"],
-            "end": timeline["end"]
-        }
-        
-        # 添加可选参数
-        if height is not None:
-            info["height"] = height
-            
-        if width is not None:
-            info["width"] = width
-            
-        # 循环分配动画，如果动画列表为空则跳过
-        if in_animations:
-            info["in_animation"] = in_animations[i % len(in_animations)]
-            
-        if in_animation_duration is not None:
-            info["in_animation_duration"] = in_animation_duration
-            
-        if loop_animations:
-            info["loop_animation"] = loop_animations[i % len(loop_animations)]
-            
-        if loop_animation_duration is not None:
-            info["loop_animation_duration"] = loop_animation_duration
-            
-        if out_animations:
-            info["out_animation"] = out_animations[i % len(out_animations)]
-            
-        if out_animation_duration is not None:
-            info["out_animation_duration"] = out_animation_duration
-            
-        if transition is not None:
-            info["transition"] = transition
-            
-        if transition_duration is not None:
-            info["transition_duration"] = transition_duration
-            
+        info = _build_image_info(img_url, timeline, height, width, i, 
+                                in_animations, out_animations, loop_animations, transition_animations,
+                                in_animation_duration, out_animation_duration, 
+                                loop_animation_duration, transition_duration)
         infos.append(info)
         logger.info(f"Processed image info {i+1}: {info}")
     
@@ -107,4 +64,55 @@ def imgs_infos(
     infos_json = json.dumps(infos, ensure_ascii=False)
     logger.info(f"Generated image infos JSON with {len(infos)} items")
     
-    return infos_json
+    return infos_json
+
+
+def _parse_animation_params(in_animation, out_animation, loop_animation, transition):
+    """解析动画参数，将用|分隔的字符串转换为列表"""
+    def parse_single_param(param):
+        if param is not None and isinstance(param, str):
+            return [anim.strip() for anim in param.split('|') if anim.strip()]
+        return []
+    
+    in_animations = parse_single_param(in_animation)
+    out_animations = parse_single_param(out_animation)
+    loop_animations = parse_single_param(loop_animation)
+    transition_animations = parse_single_param(transition)
+    
+    return in_animations, out_animations, loop_animations, transition_animations
+
+
+def _build_image_info(img_url, timeline, height, width, i,
+                      in_animations, out_animations, loop_animations, transition_animations,
+                      in_animation_duration, out_animation_duration,
+                      loop_animation_duration, transition_duration):
+    """构建单个图片信息字典"""
+    info = {
+        "image_url": img_url,
+        "start": timeline["start"],
+        "end": timeline["end"]
+    }
+    
+    # 添加尺寸参数
+    if height is not None:
+        info["height"] = height
+    if width is not None:
+        info["width"] = width
+    
+    # 添加动画参数，只有当动画存在时才添加对应的duration
+    _add_animation_if_exists(info, "in_animation", in_animations, i, in_animation_duration)
+    _add_animation_if_exists(info, "out_animation", out_animations, i, out_animation_duration)
+    _add_animation_if_exists(info, "loop_animation", loop_animations, i, loop_animation_duration)
+    _add_animation_if_exists(info, "transition", transition_animations, i, transition_duration)
+    
+    return info
+
+
+def _add_animation_if_exists(info, animation_key, animations, index, duration):
+    """如果动画存在，则添加动画和对应的duration"""
+    if animations and index < len(animations):
+        info[animation_key] = animations[index]
+        # 只有当动画存在时才添加对应的duration
+        if duration is not None:
+            duration_key = animation_key + "_duration"
+            info[duration_key] = duration