refactor: restructure DNS setting logic

src-tauri/src/cmd/clash.rs

@@ -77,3 +77,142 @@ pub async fn clash_api_get_proxy_delay(
 pub async fn test_delay(url: String) -> CmdResult<u32> {
     Ok(feat::test_delay(url).await.unwrap_or(10000u32))
 }
+
+/// 保存DNS配置到单独文件
+#[tauri::command]
+pub async fn save_dns_config(dns_config: Mapping) -> CmdResult {
+    use crate::utils::dirs;
+    use serde_yaml;
+    use std::fs;
+    
+    // 获取DNS配置文件路径
+    let dns_path = dirs::app_home_dir().map_err(|e| e.to_string())?
+        .join("dns_config.yaml");
+    
+    // 保存DNS配置到文件
+    let yaml_str = serde_yaml::to_string(&dns_config).map_err(|e| e.to_string())?;
+    fs::write(&dns_path, yaml_str).map_err(|e| e.to_string())?;
+    log::info!(target: "app", "DNS config saved to {:?}", dns_path);
+    
+    Ok(())
+}
+
+/// 应用或撤销DNS配置
+#[tauri::command]
+pub fn apply_dns_config(apply: bool) -> CmdResult {
+    use crate::utils::dirs;
+    use crate::core::{handle, CoreManager};
+    use crate::config::Config;
+    use tauri::async_runtime;
+
+    // 使用spawn来处理异步操作
+    async_runtime::spawn(async move {
+        if apply {
+            // 读取DNS配置文件
+            let dns_path = match dirs::app_home_dir() {
+                Ok(path) => path.join("dns_config.yaml"),
+                Err(e) => {
+                    log::error!(target: "app", "Failed to get home dir: {}", e);
+                    return;
+                }
+            };
+            
+            if !dns_path.exists() {
+                log::warn!(target: "app", "DNS config file not found");
+                return;
+            }
+            
+            let dns_yaml = match std::fs::read_to_string(&dns_path) {
+                Ok(content) => content,
+                Err(e) => {
+                    log::error!(target: "app", "Failed to read DNS config: {}", e);
+                    return;
+                }
+            };
+            
+            // 解析DNS配置并创建patch
+            let patch_config = match serde_yaml::from_str::<serde_yaml::Mapping>(&dns_yaml) {
+                Ok(config) => {
+                    let mut patch = serde_yaml::Mapping::new();
+                    patch.insert("dns".into(), config.into());
+                    patch
+                },
+                Err(e) => {
+                    log::error!(target: "app", "Failed to parse DNS config: {}", e);
+                    return;
+                }
+            };
+            
+            log::info!(target: "app", "Applying DNS config from file");
+            
+            // 重新生成配置，确保DNS配置被正确应用
+            // 这里不调用patch_clash以避免将DNS配置写入config.yaml
+            Config::runtime().latest().patch_config(patch_config.clone());
+            
+            // 首先重新生成配置
+            if let Err(err) = Config::generate().await {
+                log::error!(target: "app", "Failed to regenerate config with DNS: {}", err);
+                return;
+            }
+            
+            // 然后应用新配置
+            if let Err(err) = CoreManager::global().update_config().await {
+                log::error!(target: "app", "Failed to apply config with DNS: {}", err);
+            } else {
+                log::info!(target: "app", "DNS config successfully applied");
+                handle::Handle::refresh_clash();
+            }
+        } else {
+            // 当关闭DNS设置时，不需要对配置进行任何修改
+            // 直接重新生成配置，让enhance函数自动跳过DNS配置的加载
+            log::info!(target: "app", "DNS settings disabled, regenerating config");
+            
+            // 重新生成配置
+            if let Err(err) = Config::generate().await {
+                log::error!(target: "app", "Failed to regenerate config: {}", err);
+                return;
+            }
+            
+            // 应用新配置
+            match CoreManager::global().update_config().await {
+                Ok(_) => {
+                    log::info!(target: "app", "Config regenerated successfully");
+                    handle::Handle::refresh_clash();
+                },
+                Err(err) => {
+                    log::error!(target: "app", "Failed to apply regenerated config: {}", err);
+                }
+            }
+        }
+    });
+    
+    Ok(())
+}
+
+/// 检查DNS配置文件是否存在
+#[tauri::command]
+pub fn check_dns_config_exists() -> CmdResult<bool> {
+    use crate::utils::dirs;
+    
+    let dns_path = dirs::app_home_dir().map_err(|e| e.to_string())?
+        .join("dns_config.yaml");
+    
+    Ok(dns_path.exists())
+}
+
+/// 获取DNS配置文件内容
+#[tauri::command]
+pub async fn get_dns_config_content() -> CmdResult<String> {
+    use crate::utils::dirs;
+    use std::fs;
+    
+    let dns_path = dirs::app_home_dir().map_err(|e| e.to_string())?
+        .join("dns_config.yaml");
+    
+    if !dns_path.exists() {
+        return Err("DNS config file not found".into());
+    }
+    
+    let content = fs::read_to_string(&dns_path).map_err(|e| e.to_string())?;
+    Ok(content)
+}