refactor: streamline provider interactions and enhance error handling

open-sse/executors/gemini-cli.js

@@ -0,0 +1,62 @@
+import { BaseExecutor } from "./base.js";
+import { PROVIDERS, OAUTH_ENDPOINTS } from "../config/constants.js";
+
+export class GeminiCLIExecutor extends BaseExecutor {
+  constructor() {
+    super("gemini-cli", PROVIDERS["gemini-cli"]);
+  }
+
+  buildUrl(model, stream, urlIndex = 0) {
+    const action = stream ? "streamGenerateContent?alt=sse" : "generateContent";
+    return `${this.config.baseUrl}:${action}`;
+  }
+
+  buildHeaders(credentials, stream = true) {
+    return {
+      "Content-Type": "application/json",
+      "Authorization": `Bearer ${credentials.accessToken}`,
+      ...(stream && { "Accept": "text/event-stream" })
+    };
+  }
+
+  transformRequest(model, body, stream, credentials) {
+    if (!body.project && credentials?.projectId) {
+      body.project = credentials.projectId;
+    }
+    return body;
+  }
+
+  async refreshCredentials(credentials, log) {
+    if (!credentials.refreshToken) return null;
+
+    try {
+      const response = await fetch(OAUTH_ENDPOINTS.google.token, {
+        method: "POST",
+        headers: { "Content-Type": "application/x-www-form-urlencoded", "Accept": "application/json" },
+        body: new URLSearchParams({
+          grant_type: "refresh_token",
+          refresh_token: credentials.refreshToken,
+          client_id: this.config.clientId,
+          client_secret: this.config.clientSecret
+        })
+      });
+
+      if (!response.ok) return null;
+
+      const tokens = await response.json();
+      log?.info?.("TOKEN", "Gemini CLI refreshed");
+
+      return {
+        accessToken: tokens.access_token,
+        refreshToken: tokens.refresh_token || credentials.refreshToken,
+        expiresIn: tokens.expires_in,
+        projectId: credentials.projectId
+      };
+    } catch (error) {
+      log?.error?.("TOKEN", `Gemini CLI refresh error: ${error.message}`);
+      return null;
+    }
+  }
+}
+
+export default GeminiCLIExecutor;