chore: add new structure for the ticket assinge to admins

src/modules/tickets/strategies/group.strategy.ts

@@ -0,0 +1,39 @@
+import { Injectable, InternalServerErrorException, Logger } from "@nestjs/common";
+
+import { UserGroup } from "../../users/entities/user-group.entity";
+import { User } from "../../users/entities/user.entity";
+import { UsersService } from "../../users/providers/users.service";
+import { IReferralStrategy } from "../interfaces/referral-strategy";
+
+@Injectable()
+export class GroupStrategy implements IReferralStrategy {
+  private readonly logger = new Logger(GroupStrategy.name);
+
+  constructor(private readonly usersService: UsersService) {}
+
+  async assignAdmin(group: UserGroup): Promise<User> {
+    try {
+      const { users: admins } = await this.usersService.getUsersByGroup(group.id);
+
+      if (!admins.length) {
+        this.logger.warn(`No admins found in Group: ${group.name}, falling back to super admin`);
+        //fall back
+        const superAdmin = await this.usersService.getSuperAdmin();
+        if (!superAdmin) throw new InternalServerErrorException("No super admin found as fallback");
+
+        return superAdmin;
+      }
+
+      // return the one with the fewest tickets
+      return admins.reduce((prev, curr) => ((prev.tickets?.length || 0) < (curr.tickets?.length || 0) ? prev : curr));
+      //
+    } catch (error: unknown) {
+      this.logger.error(`Error assigning admin for group ${group.name}: ${error instanceof Error ? error.message : "Unknown error"}`);
+      // If any error occurs, try to get a super admin as last resort
+      const superAdmin = await this.usersService.getSuperAdmin();
+      if (!superAdmin) throw new InternalServerErrorException("No super admin found as fallback");
+
+      return superAdmin;
+    }
+  }
+}