feat: 完成图片生成功能

Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Domain.Shared/Dtos/Gemini/GeminiGenerateContentAcquirer.cs

@@ -36,10 +36,32 @@ public static class GeminiGenerateContentAcquirer
     /// </summary>
     /// <param name="response"></param>
     /// <returns></returns>
-    public static string GetImageBase64(JsonElement response)
+    public static string GetImagePrefixBase64(JsonElement response)
     {
-        //todo
-        //获取他的base64字符串
-        return string.Empty;
+        // 获取 candidates[0].content.parts[0].text
+        var text = response.GetPath("candidates", 0, "content", "parts", 0, "text").GetString();
+        if (string.IsNullOrEmpty(text))
+        {
+            return string.Empty;
+        }
+
+        // 解析 markdown 图片格式: ![image](data:image/png;base64,xxx)
+        // 提取括号内的 data:image/xxx;base64,xxx 部分
+        var startMarker = "(data:image/";
+        var startIndex = text.IndexOf(startMarker);
+        if (startIndex < 0)
+        {
+            return string.Empty;
+        }
+
+        // 从 "data:" 开始
+        startIndex += 1; // 跳过 "("
+        var endIndex = text.IndexOf(')', startIndex);
+        if (endIndex < 0)
+        {
+            return string.Empty;
+        }
+
+        return text.Substring(startIndex, endIndex - startIndex);
     }
 }

Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Domain.Shared/Enums/PublishStatusEnum.cs

@@ -0,0 +1,17 @@
+namespace Yi.Framework.AiHub.Domain.Shared.Enums;
+
+/// <summary>
+/// 发布状态枚举
+/// </summary>
+public enum PublishStatusEnum
+{
+    /// <summary>
+    /// 未发布
+    /// </summary>
+    Unpublished = 0,
+
+    /// <summary>
+    /// 已发布
+    /// </summary>
+    Published = 1
+}