feat: 新增gemini支持

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

@@ -0,0 +1,33 @@
+using System.Text.Json;
+using Yi.Framework.AiHub.Domain.Shared.Dtos.OpenAi;
+using Yi.Framework.AiHub.Domain.Shared.Extensions;
+
+namespace Yi.Framework.AiHub.Domain.Shared.Dtos.Gemini;
+
+public static class GeminiGenerateContentAcquirer
+{
+    public static ThorUsageResponse GetUsage(JsonElement response)
+    {
+        var usage = response.GetPath("usageMetadata");
+        if (!usage.HasValue)
+        {
+            return new ThorUsageResponse();
+        }
+
+        var inputTokens = usage.Value.GetPath("promptTokenCount").GetInt();
+        var outputTokens = usage.Value.GetPath("candidatesTokenCount").GetInt()
+                           + usage.Value.GetPath("cachedContentTokenCount").GetInt()
+                           + usage.Value.GetPath("thoughtsTokenCount").GetInt()
+                           + usage.Value.GetPath("toolUsePromptTokenCount").GetInt();
+
+
+        return new ThorUsageResponse
+        {
+            PromptTokens = inputTokens,
+            InputTokens = inputTokens,
+            OutputTokens = outputTokens,
+            CompletionTokens = outputTokens,
+            TotalTokens = inputTokens + outputTokens,
+        };
+    }
+}