/// <summary>
/// The following region handles Event information deletion
/// </summary>
#region Delete Event Information
public bool DeleteEvent(int eId, int userId, string ip)
{
bool isSuccessfullyDeleted = false;
try
{
using (var ctx = new GreetNGroupContext())
{
Event curEvent = ctx.Events.FirstOrDefault(c => c.EventId.Equals(eId));
if (curEvent != null)
{
ctx.Events.Remove(curEvent);
}
ctx.SaveChanges();
isSuccessfullyDeleted = true;
}
LogGNGEventDeleted(userId.ToString(), eId, ip);
return(isSuccessfullyDeleted);
}
catch (ObjectDisposedException od)
{
_gngLoggerService.LogGNGInternalErrors(od.ToString());
return(isSuccessfullyDeleted);
}
}
/// <summary>
/// Updates current user rating with a new rating
/// </summary>
/// <param name="rating">new Rating information</param>
/// <param name="ip">user ip</param>
/// <returns></returns>
public bool UpdateRating(UserRating rating, string ip)
{
var userRating = new UserRating();
try
{
using (var context = new GreetNGroupContext())
{
var query = context.UserRatings.Where(s => s.RaterId1 == rating.RaterId1 && s.RatedId1 == rating.RatedId1).FirstOrDefault <UserRating>();
if (query.Rating == rating.Rating)
{
query.Rating = 0;
}
else
{
query.Rating = rating.Rating;
}
context.SaveChanges();
}
return(true);
}
catch (Exception e)
{
_gngLoggerService.LogGNGInternalErrors(e.ToString());
return(false);
}
}
/// <summary>
/// The following region handles deletion of data from the user table in the database
/// </summary>
#region Delete User Information
/*
* For our application, the DeleteUser function is made to set user values to null
* apart from UserId and userName which is used as reference
*/
public bool DeleteUser(User userToDelete)
{
try
{
using (var ctx = new GreetNGroupContext())
{
/*
* User(int uId, string firstName, string lastName, string userName, string city,
* string state, string country, DateTime dob, bool isActivated)
*/
var user = ctx.Users.FirstOrDefault(c => c.UserId.Equals(userToDelete.UserId));
var blankUser = new User(user.UserId, null, null, "User has been deleted", null, null,
null, DateTime.Now, false);
if (user != null)
{
//ctx.Users.Remove(user);
user = blankUser;
ctx.SaveChanges();
return(true);
}
return(false);
}
}
catch (ObjectDisposedException od)
{
_gngLoggerService.LogGNGInternalErrors(od.ToString());
return(false);
}
}
public bool InvalidateToken(string jwtToken)
{
try
{
using (var ctx = new GreetNGroupContext())
{
var userID = GetUserIDFromToken(jwtToken);
var retrievedToken = ctx.JWTTokens.Where(j => j.Token == jwtToken)
.Where(j => j.UserId == userID)
.First();
if (retrievedToken != null)
{
retrievedToken.isValid = false;
ctx.Entry(retrievedToken).State = EntityState.Modified;
ctx.SaveChanges();
return(true);
}
return(false);
}
}
catch
{
return(false);
}
}
/*
* The functions within this service make use of the database context
* and similarly attempt to catch
* ObjectDisposedException
* to ensure the context is still valid and we want to catch the error
* where it has been made
*
*/
/// <summary>
/// The following region handles inserts into the user table of the database
/// </summary>
#region Insert User Information
// Inserts given user object into database
public bool InsertUser(User user)
{
try
{
using (var ctx = new GreetNGroupContext())
{
// Catch existing users
if (user.UserName != null)
{
if (ctx.Users.Any(c => c.UserName.Equals(user.UserName)))
{
return(false);
}
}
// Adds user
ctx.Users.Add(user);
ctx.SaveChanges();
return(true);
}
}
catch (ObjectDisposedException od)
{
_gngLoggerService.LogGNGInternalErrors(od.ToString());
return(false);
}
}
public bool AddDefaultClaims(User newUser)
{
var isSuccessfulAdd = false;
try
{
using (var ctx = new GreetNGroupContext())
{
var userID = newUser.UserId;
var claimToAdd = ctx.Claims.FirstOrDefault(c => c.ClaimId.Equals(1));
var claimToAdd2 = ctx.Claims.FirstOrDefault(c => c.ClaimId.Equals(2));
var claimToAdd3 = ctx.Claims.FirstOrDefault(c => c.ClaimId.Equals(8));
var claimToAdd4 = ctx.Claims.FirstOrDefault(c => c.ClaimId.Equals(9));
var userClaim = new UserClaim(userID, claimToAdd);
var userClaim2 = new UserClaim(userID, claimToAdd2);
var userClaim3 = new UserClaim(userID, claimToAdd3);
var userClaim4 = new UserClaim(userID, claimToAdd4);
ctx.UserClaims.Add(userClaim);
ctx.UserClaims.Add(userClaim2);
ctx.UserClaims.Add(userClaim3);
ctx.UserClaims.Add(userClaim4);
ctx.SaveChanges();
isSuccessfulAdd = true;
return(isSuccessfulAdd);
}
}
catch (Exception od)
{
_gngLoggerService.LogGNGInternalErrors(od.ToString());
return(isSuccessfulAdd);
}
}
// Removes pair of tagId and eventId where values match in database
public bool DeleteEventTag(int eventId, string tag)
{
var isSuccessfulDelete = false;
try
{
using (var ctx = new GreetNGroupContext())
{
var eventTags = ctx.EventTags.Where(e => e.EventId.Equals(eventId));
var targetTagId = ctx.Tags.FirstOrDefault(t => t.TagName.Equals(tag)).TagId;
foreach (var tags in eventTags)
{
if (tags.TagId.Equals(targetTagId))
{
ctx.EventTags.Remove(tags);
isSuccessfulDelete = true;
}
}
ctx.SaveChanges();
}
return(isSuccessfulDelete);
}
catch (ObjectDisposedException od)
{
_gngLoggerService.LogGNGInternalErrors(od.ToString());
return(isSuccessfulDelete);
}
}
public bool SetEventToExpired(int eId)
{
var isSuccessfulEventUpdate = false;
try
{
if (IsEventExpired(eId) == true)
{
using (var ctx = new GreetNGroupContext())
{
var eventToUpdate = ctx.Events.FirstOrDefault(e => e.EventId.Equals(eId));
eventToUpdate.IsEventExpired = true;
ctx.SaveChanges();
}
}
else
{
return(isSuccessfulEventUpdate);
}
return(isSuccessfulEventUpdate);
}
catch (Exception e)
{
_gngLoggerService.LogGNGInternalErrors(e.ToString());
return(isSuccessfulEventUpdate);
}
}
public Attendance UpdateAttendance(Attendance updatedAtendance)
{
using (var _db = new GreetNGroupContext())
{
_db.Entry(updatedAtendance).State = EntityState.Modified;
_db.SaveChanges();
return(updatedAtendance);
}
}
public HttpResponseMessage DeleteUser(string email)
{
try
{
using (var ctx = new GreetNGroupContext())
{
var retrievedUser = ctx.Users.Where(u => u.UserName == email).FirstOrDefault <User>();
if (retrievedUser == null)
{
var httpResponseFail = new HttpResponseMessage(HttpStatusCode.NotFound)
{
Content = new StringContent("User not found in system")
};
return(httpResponseFail);
}
ctx.JWTTokens.RemoveRange(ctx.JWTTokens.Where(j => j.UserId == retrievedUser.UserId));
ctx.UserRatings.RemoveRange(ctx.UserRatings.Where(u => u.RatedId1 == retrievedUser.UserId));
ctx.UserRatings.RemoveRange(ctx.UserRatings.Where(u => u.RaterId1 == retrievedUser.UserId));
var retrievedClaims = ctx.UserClaims.Where(c => c.UId == retrievedUser.UserId).FirstOrDefault <UserClaim>();
ctx.UserClaims.Remove(retrievedClaims);
retrievedUser.FirstName = "Deleted";
retrievedUser.LastName = "User";
retrievedUser.UserName = "******";
retrievedUser.State = "CA";
retrievedUser.City = "LB";
retrievedUser.Country = "USA";
retrievedUser.DoB = DateTime.Now;
retrievedUser.IsActivated = false;
ctx.SaveChanges();
var httpResponseSuccess = new HttpResponseMessage(HttpStatusCode.OK)
{
Content = new StringContent("User was deleted from GreetNGroup")
};
return(httpResponseSuccess);
}
}
catch (Exception ex)
{
_gngLoggerService.LogGNGInternalErrors(ex.ToString());
var httpResponse = new HttpResponseMessage(HttpStatusCode.InternalServerError)
{
Content = new StringContent(ex.ToString())
};
return(httpResponse);
}
}
/*
* The functions within this service make use of the database context
* and similarly attempt to catch
* ObjectDisposedException
* to ensure the context is still valid and we want to catch the error
* where it has been made
*
*/
/// <summary>
/// The following region inserts an event/event details into the event database
/// </summary>
#region Insert Event Information
public bool InsertMadeEvent(Event e)
{
try
{
using (var ctx = new GreetNGroupContext())
{
ctx.Events.Add(e);
ctx.SaveChanges();
return(true);
}
}
catch (ObjectDisposedException od)
{
_gngLoggerService.LogGNGInternalErrors(od.ToString());
return(false);
}
}
/// <summary>
/// The following region handles updating user information within the database
/// </summary>
#region Update User Information
// Updates user by replacing user object in database with new user object with updated fields
public bool UpdateUser(User updatedUser)
{
try
{
using (var ctx = new GreetNGroupContext())
{
ctx.Entry(updatedUser).State = EntityState.Modified;
ctx.SaveChanges();
return(true);
}
}
catch (ObjectDisposedException od)
{
_gngLoggerService.LogGNGInternalErrors(od.ToString());
return(false);
}
}
public Event InsertEvent(int userId, DateTime startDate, string eventName,
string address, string city, string state, string zip, List <string> eventTags, string eventDescription,
string ip, string url)
{
Event userEvent = null;
try
{
string eventLocation = ParseAddress(address, city, state, zip);
using (var ctx = new GreetNGroupContext())
{
userEvent = new Event(userId, eventId, startDate, eventName, eventLocation, eventDescription);
ctx.Events.Add(userEvent);
ctx.SaveChanges();
foreach (var tags in eventTags)
{
if (_eventTagService.InsertEventTag(eventId, tags) == false)
{
userEvent = null;
_gngLoggerService.LogErrorsEncountered(userId.ToString(), "409 Conflict",
url, "The event failed to be created", ip);
return(userEvent);
}
if (InsertEventCheckinCode(eventId) == false)
{
userEvent = null;
_gngLoggerService.LogErrorsEncountered(userId.ToString(), "409 Conflict",
url, "The event failed to be created", ip);
}
}
LogGNGEventsCreated(userId.ToString(), eventId, ip);
eventId++;
Environment.SetEnvironmentVariable("EventId", eventId.ToString(), EnvironmentVariableTarget.User);
}
return(userEvent);
}
catch (Exception od)
{
_gngLoggerService.LogGNGInternalErrors(od.ToString());
return(userEvent);
}
}
/// <summary>
/// This region handles inserting claim information into the database
/// </summary>
#region Insert Claim Information
// Inserts claim with corresponding claim id into database
public void InsertClaim(int claimId, string claimName)
{
try
{
using (var ctx = new GreetNGroupContext())
{
var claim = new Claim(claimId, claimName);
ctx.Claims.Add(claim);
ctx.SaveChanges();
}
}
catch (ObjectDisposedException od) // check for context availability : should pass
{
_gngLoggerService.LogGNGInternalErrors(od.ToString());
}
}
/// <summary>
/// Inserts an attendee to the attandee table
/// </summary>
/// <param name="attendee">the current attendee</param>
/// <returns>boolean if the attendee was successfully added or not</returns>
public bool InsertAttendee(int eventId, int userId)
{
try
{
Attendance attendee = new Attendance(eventId, userId, false);
using (var ctx = new GreetNGroupContext())
{
ctx.Attendees.Add(attendee);
ctx.SaveChanges();
return(true);
}
}
catch (ObjectDisposedException od)
{
_gngLoggerService.LogGNGInternalErrors(od.ToString());
return(false);
}
}
public bool CreateRating(UserRating rating, string ip)
{
try
{
using (var ctx = new GreetNGroupContext())
{
ctx.UserRatings.Add(rating);
ctx.SaveChanges();
// LogGNGUserRating(rating.RaterId.ToString(), rating.RatedId.ToString(), ip);
return(true);
}
}
catch (Exception e)
{
_gngLoggerService.LogGNGInternalErrors(e.ToString());
Console.WriteLine(e);
return(false);
}
}
/// <summary>
/// This region removes Claims from the database
/// </summary>
#region Delete Claim Information
// Removes claim from database given proper claimId
public void DeleteClaimById(int claimId)
{
try
{
using (var ctx = new GreetNGroupContext())
{
var claim = ctx.Claims.FirstOrDefault(c => c.ClaimId.Equals(claimId));
if (claim != null)
{
ctx.Claims.Remove(claim);
}
ctx.SaveChanges();
}
}
catch (ObjectDisposedException od)
{
_gngLoggerService.LogGNGInternalErrors(od.ToString());
}
}
// Updates city information on user
public bool UpdateUserCity(int uId, string city)
{
try
{
using (var ctx = new GreetNGroupContext())
{
User curUser = ctx.Users.FirstOrDefault(c => c.UserId.Equals(uId));
if (curUser != null)
{
curUser.City = city;
ctx.SaveChanges();
return(true);
}
return(false);
}
}
catch (ObjectDisposedException od)
{
_gngLoggerService.LogGNGInternalErrors(od.ToString());
return(false);
}
}
public bool InsertEventCheckinCode(int eventId)
{
bool isSuccessfullyAdded = false;
try
{
var checkinCode = GenerateCheckinCode(4);
using (var ctx = new GreetNGroupContext())
{
var eventToAddCode = ctx.Events.FirstOrDefault(e => e.EventId.Equals(eventId));
eventToAddCode.EventCheckinCode = checkinCode;
ctx.SaveChanges();
isSuccessfullyAdded = true;
return(isSuccessfullyAdded);
}
}
catch (Exception e)
{
_gngLoggerService.LogGNGInternalErrors(e.ToString());
return(isSuccessfullyAdded);
}
}
public bool AddTokenToDB(string jwtToken, int userID)
{
try
{
using (var ctx = new GreetNGroupContext())
{
var newTokenID = GetNextJWTTokenID();
if (newTokenID == -1)
{
return(false);
}
var JWTTokenToAdd = new JWTToken(newTokenID, jwtToken, userID, true);
ctx.JWTTokens.Add(JWTTokenToAdd);
ctx.SaveChanges();
return(true);
}
}
catch (Exception e)
{
return(false);
}
}
public bool DeleteTokenFromDB(string jwtToken)
{
try
{
using (var ctx = new GreetNGroupContext())
{
var userID = GetUserIDFromToken(jwtToken);
var TokenToRemove = ctx.JWTTokens.Where(j => j.Token == jwtToken)
.Where(j => j.UserId == userID)
.First();
if (TokenToRemove != null)
{
ctx.JWTTokens.Remove(TokenToRemove);
ctx.SaveChanges();
return(true);
}
return(false);
}
}
catch
{
return(false);
}
}
// Inserts EventTag into the database, creates a link between an event and a tag
public bool InsertEventTag(int eventId, string tag)
{
var isSuccessfulAdd = false;
try
{
using (var ctx = new GreetNGroupContext())
{
var tagToAdd = ctx.Tags.FirstOrDefault(t => t.TagName.Equals(tag));
var tagIdNum = tagToAdd.TagId;
var eventTag = new EventTag(eventId, tagIdNum);
ctx.EventTags.Add(eventTag);
ctx.SaveChanges();
isSuccessfulAdd = true;
}
return(isSuccessfulAdd);
}
catch (ObjectDisposedException od)
{
_gngLoggerService.LogGNGInternalErrors(od.ToString());
return(isSuccessfulAdd);
}
}
public bool AddClaimToUser(string username, Claim claim)
{
var isSuccessfulAdd = false;
try
{
using (var ctx = new GreetNGroupContext())
{
var user = ctx.Users.FirstOrDefault(u => u.UserName.Equals(username));
var userId = user.UserId;
var claimToAdd = ctx.Claims.FirstOrDefault(c => c.ClaimName.Equals(claim.ClaimName));
UserClaim userClaim = new UserClaim(userId, claimToAdd);
ctx.UserClaims.Add(userClaim);
ctx.SaveChanges();
isSuccessfulAdd = true;
}
return(isSuccessfulAdd);
}
catch (ObjectDisposedException od)
{
_gngLoggerService.LogGNGInternalErrors(od.ToString());
return(isSuccessfulAdd);
}
}
/// <summary>
/// Removes attendee from table
/// </summary>
/// <param name="eventId">event id </param>
/// <param name="userId">user id</param>
/// <returns>Removes the specififed attendee from the table</returns>
public bool DeleteAttendee(int eventId, int userId)
{
var isSuccessfullyDeleted = false;
try
{
using (var ctx = new GreetNGroupContext())
{
Attendance curAttendee = ctx.Attendees.FirstOrDefault(c => c.EventId.Equals(eventId) && c.UserId.Equals(userId));
if (curAttendee != null)
{
ctx.Attendees.Remove(curAttendee);
}
ctx.SaveChanges();
isSuccessfullyDeleted = true;
}
return(isSuccessfullyDeleted);
}
catch (ObjectDisposedException od)
{
_gngLoggerService.LogGNGInternalErrors(od.ToString());
return(isSuccessfullyDeleted);
}
}
protected override Task <HttpResponseMessage> SendAsync(
HttpRequestMessage request, CancellationToken cancellationToken)
{
using (var _db = new GreetNGroupContext())
{
try
{
var existingConnection = _db.Database.Exists();
if (!existingConnection)
{
var httpResponseError = new HttpResponseMessage(HttpStatusCode.InternalServerError)
{
Content = new StringContent("GreetNGroup is offline, database connection error")
};
var tscError = new TaskCompletionSource <HttpResponseMessage>();
tscError.SetResult(httpResponseError); // Also sets the task state to "RanToCompletion"
return(tscError.Task);
}
_db.SaveChanges();
Ping pingSender = new Ping();
PingOptions options = new PingOptions
{
// Use the default Ttl value which is 128,
// but change the fragmentation behavior.
DontFragment = true
};
byte[] buffer = Encoding.ASCII.GetBytes(data);
PingReply reply = pingSender.Send(awsInstanceIPAddress, timeout, buffer, options);
if (reply.Status == IPStatus.Success)
{
var httpResponseSuccess = new HttpResponseMessage(HttpStatusCode.OK)
{
Content = new StringContent("GreetNGroup is online")
};
var tscSuccess = new TaskCompletionSource <HttpResponseMessage>();
tscSuccess.SetResult(httpResponseSuccess); // Also sets the task state to "RanToCompletion"
return(tscSuccess.Task);
}
var httpResponse = new HttpResponseMessage(HttpStatusCode.InternalServerError)
{
Content = new StringContent("GreetNGroup is offline")
};
var tsc = new TaskCompletionSource <HttpResponseMessage>();
tsc.SetResult(httpResponse); // Also sets the task state to "RanToCompletion"
return(tsc.Task);
}
catch (Exception) // catch error when trying to call db, return status of internal problems
{
var httpResponse = new HttpResponseMessage(HttpStatusCode.InternalServerError)
{
Content = new StringContent("GreetNGroup is offline")
};
var tsc = new TaskCompletionSource <HttpResponseMessage>();
tsc.SetResult(httpResponse); // Also sets the task state to "RanToCompletion"
return(tsc.Task);
}
}
}
/// <summary>
/// The following region handles update of Event specific information
/// </summary>
#region Update Event Information
public bool UpdateEvent(int eId, int userId, DateTime startDate, string eventName,
string address, string city, string state, string zip, List <string> eventTags, string eventDescription,
string url, string ip)
{
var isSuccessfullyUpdated = false;
var isTagsSuccessfullyUpdated = false;
try
{
using (var ctx = new GreetNGroupContext())
{
var currentEvent = ctx.Events.FirstOrDefault(e => e.EventId.Equals(eId));
if (currentEvent != null)
{
currentEvent.UserId = userId;
currentEvent.EventName = eventName;
currentEvent.StartDate = startDate;
currentEvent.EventLocation = ParseAddress(address, city, state, zip);
currentEvent.EventDescription = eventDescription;
ctx.SaveChanges();
if (eventTags.Count != 0)
{
var currentEventTags = ctx.EventTags.Where(e => e.EventId.Equals(eId));
foreach (var tags in currentEventTags)
{
if (!eventTags.Contains(tags.Tag.TagName))
{
isTagsSuccessfullyUpdated = _eventTagService.DeleteEventTag(eId, tags.Tag.TagName);
}
else
{
eventTags.Remove(tags.Tag.TagName);
}
}
foreach (var tags in eventTags)
{
isTagsSuccessfullyUpdated = _eventTagService.InsertEventTag(eId, tags);
}
}
if (isTagsSuccessfullyUpdated == true)
{
isSuccessfullyUpdated = true;
LogGNGEventUpdate(eventId, userId.ToString(), ip);
}
}
else
{
_gngLoggerService.LogErrorsEncountered(userId.ToString(), "409 Conflict", url, "The event failed" +
"to be updated", ip);
return(isSuccessfullyUpdated);
}
}
return(isSuccessfullyUpdated);
}
catch (ObjectDisposedException od)
{
_gngLoggerService.LogGNGInternalErrors(od.ToString());
return(isSuccessfullyUpdated);
}
}
