session.ts

import mongoose from "mongoose";

export class SessionModel {
 model: mongoose.Model<mongoose.Document, {}>;
 constructor() {
  this.define();
 }
 
 private define() {
  this.model = mongoose.model("Session", new mongoose.Schema({
   sessionId: {
    type: String
   }
  }));
 }
   
 invalidate(sessionId): Promise<mongoose.Document> {
  return Promise.resolve(
   this.model.create({ sessionId })
  );
 }
   
 async isInvalid(sessionId): Promise<boolean> {
  const m = await this.model.findOne({ sessionId });
  return Promise.resolve(!!m);
 }
}