feat: Add Gemini version settings configuration support (close #568)

setting/model_setting/gemini.go

@@ -1,4 +1,4 @@
-package setting
+package model_setting
 
 import (
 	"encoding/json"
@@ -43,3 +43,41 @@ func GeminiSafetySettingsJsonString() string {
 	}
 	return string(jsonString)
 }
+
+var geminiVersionSettings = map[string]string{
+	"default":        "v1beta",
+	"gemini-1.0-pro": "v1",
+}
+
+func GetGeminiVersionSetting(key string) string {
+	if value, ok := geminiVersionSettings[key]; ok {
+		return value
+	}
+	return geminiVersionSettings["default"]
+}
+
+func GeminiVersionSettingFromJsonString(jsonString string) {
+	geminiVersionSettings = map[string]string{}
+	err := json.Unmarshal([]byte(jsonString), &geminiVersionSettings)
+	if err != nil {
+		geminiVersionSettings = map[string]string{
+			"default": "v1beta",
+		}
+	}
+	// check must have default
+	if _, ok := geminiVersionSettings["default"]; !ok {
+		geminiVersionSettings["default"] = "v1beta"
+	}
+}
+
+func GeminiVersionSettingsJsonString() string {
+	// check must have default
+	if _, ok := geminiVersionSettings["default"]; !ok {
+		geminiVersionSettings["default"] = "v1beta"
+	}
+	jsonString, err := json.Marshal(geminiVersionSettings)
+	if err != nil {
+		return "{}"
+	}
+	return string(jsonString)
+}