Apex Check User Session Still Valid

Checking if a user has a valid session before making a query or call else an INVALID_SESSION error will be returned. The value of time remaining for the session can be cached and referenced so this query only runs a few times. Every time a user makes a request we can check the cache and see if the user has time remaining.

Query session information and returning UserSession model

public static UserSession getUserSessionInfo(User userObj){
      UserSession bpUserSession = new UserSession();
      List<AuthSession> session = [Select LastModifiedDate, NumSecondsValid from AuthSession where UsersId = : userObj.Id] ;
      bpUserSession.setSessionValid(false);

      for(AuthSession sessionObj : session){
          bpUserSession.setSecondsValid(sessionObj.NumSecondsValid);
          bpUserSession.setLastModifiedDate(sessionObj.LastModifiedDate);
      }

      if (bpUserSession.getSecondsValid()!=null)
        bpUserSession.setSessionExpireTime(bpUserSession.getLastModifiedDate().addSeconds(bpUserSession.getSecondsValid()));

      if( bpUserSession.getSessionExpireTime() > System.now())
          bpUserSession.setSessionValid(true);

      List<AggregateResult> loginHistoryObj = [SELECT MAX(LoginTime) FROM LoginHistory WHERE UserId = : userObj.Id GROUP BY UserId];

      DateTime loginDateTime = (DateTime)loginHistoryObj[0].get('expr0');
      bpUserSession.setLoginTime(loginDateTime);
      Date loginDate = loginDatetime.date();
      if( logindate != (DateTime.now()).date())
          bpUserSession.setSessionValid(false);

     return bpUserSession;
    }

User Session model to set session information

    public class UserSession {
      DateTime lastModifiedDate;
      Integer secondsValid;
      DateTime sessionExpireTime;
      Boolean sessionValid;
      DateTime loginTime;

      public void setLastModifiedDate(DateTime lastModifiedDate){
        this.lastModifiedDate = lastModifiedDate;
      }

      public DateTime getLastModifiedDate(){
        return lastModifiedDate;
      }

      public void setSecondsValid(Integer secondsValid){
        this.secondsValid = secondsValid;
      }

      public Integer getSecondsValid(){
        return secondsValid;
      }

      public void setSessionExpireTime(DateTime sessionExpireTime){
        this.sessionExpireTime = sessionExpireTime;
      }

      public DateTime getSessionExpireTime(){
        return sessionExpireTime;
      }

      public void setSessionValid(Boolean sessionValid){
        this.sessionValid = sessionValid;
      }

      public Boolean getSessionValid(){
        return sessionValid;
      }

      public void setLoginTime(DateTime loginTime){
        this.loginTime = loginTime;
      }

      public DateTime getLoginTime(){
        return loginTime;
      }
    }