feat: refactor createDatabase method to remove databaseNodeId parameter and implement findOptimalNode in DatabaseNodeService for improved database node selection

src/databaseManager/database/database.manager.controller.ts

@@ -14,11 +14,8 @@ export class DatabaseManagerController {
   ) {}
 
   @Post("create")
-  createDatabase(@Body() body: { projectId: string; databaseNodeId: string }) {
-    return this.databaseManagerService.createDatabase(
-      body.databaseNodeId,
-      body.projectId
-    );
+  createDatabase(@Body() body: { projectId: string }) {
+    return this.databaseManagerService.createDatabase(body.projectId);
   }
 
   @Post("node/create")

src/databaseManager/database/database.manager.service.ts

@@ -84,11 +84,8 @@ export class DatabaseManagerService extends DatabaseEncryptionService {
     };
   }
 
-  async createDatabase(
-    databaseNodeId: string,
-    projectId: string
-  ): Promise<Database> {
-    const node = await this.databaseNodeService.findById(databaseNodeId);
+  async createDatabase(projectId: string): Promise<Database> {
+    const node = await this.databaseNodeService.findOptimalNode();
 
     if (!node) {
       throw new Error("Database node not found");
@@ -114,7 +111,7 @@ export class DatabaseManagerService extends DatabaseEncryptionService {
         q_username,
         password: this.decryptPassword(password),
       },
-      databaseNodeId
+      node.id
     );
 
     const database = this.databaseRepository.create({

src/databaseManager/databaseNode/database.node.service.ts

@@ -18,6 +18,22 @@ export class DatabaseNodeService extends DatabaseEncryptionService {
     return this.databaseNodeRepository.findOne({ where: { id } });
   }
 
+  async findOptimalNode(): Promise<DatabaseNode | null> {
+    const nodes = await this.databaseNodeRepository.find({
+      relations: ["databases"],
+    });
+
+    if (nodes.length === 0) {
+      return null;
+    }
+
+    return nodes.reduce((optimalNode, currentNode) => {
+      const currentCount = currentNode.databases?.length || 0;
+      const optimalCount = optimalNode.databases?.length || 0;
+      return currentCount < optimalCount ? currentNode : optimalNode;
+    });
+  }
+
   async initDatabase(
     data: {
       database: string;