Regression: Fix Inactive Departments still visible on Livechat (#24267)

app/models/server/models/LivechatDepartment.js

@@ -138,6 +138,19 @@ export class LivechatDepartment extends Base {
 		return this.find(query, options);
 	}
 
+	findActiveByUnitIds(unitIds, options) {
+		const query = {
+			enabled: true,
+			numAgents: { $gt: 0 },
+			parentId: {
+				$exists: true,
+				$in: unitIds,
+			},
+		};
+
+		return this.find(query, options);
+	}
+
 	unsetFallbackDepartmentByDepartmentId(_id) {
 		return this.update(
 			{ fallbackForwardDepartment: _id },

ee/app/models/server/models/LivechatDepartment.js

@@ -51,7 +51,7 @@ overwriteClassOnLicense('livechat-enterprise', LivechatDepartment, {
 			throw new Meteor.Error('error-unit-not-found', `Error! No Active Business Unit found with id: ${businessUnit}`);
 		}
 
-		return LivechatDepartmentModel.findByUnitIds([businessUnit], { fields });
+		return LivechatDepartmentModel.findActiveByUnitIds([businessUnit], { fields });
 	},
 });