/// <summary>
/// Remove user from the specified group
/// </summary>
/// <param name="userId">Id of the user, who wants to leave the group</param>
/// <param name="groupId">Id of the group that the user wants to leave</param>
/// <returns>none</returns>
public static void LeaveGroup(string userId, int groupId)
{
using (var ctx = new PiChatDbContext())
{
// REVIEW: SingleOrDefault().Role jól elszáll, ha nem talál elemet.
var groupMembership = ctx.GroupMemberships.Where(c => (c.UserId == userId && c.GroupId == groupId)).SingleOrDefault();
// REVIEW: itt látszik jól, hogy a kontroll a returnnél átesik a hívóhoz, ezért jobb lenne a következő sorba törni.
if (groupMembership == null)
{
throw new PiChatEntityNotFoundException();
}
if (groupMembership.Role == GroupMembershipRole.Owner || groupMembership.Role < GroupMembershipRole.Member)
{
throw new PiChatGenericException(String.Format("You cant unsubscribe from a group while your role is '{0}'", groupMembership.Role));
}
ctx.GroupMemberships.Remove(groupMembership);
ctx.SaveChanges();
////régi
//if (ctx.GroupMemberships.Where(c => (c.UserId.Equals(userId) && c.GroupId == groupId)).SingleOrDefault() != null) return;
//var groupMembership = new GroupMembership { UserId = userId, GroupId = groupId };
//ctx.GroupMemberships.Attach(groupMembership);
//ctx.GroupMemberships.Remove(groupMembership);
//ctx.SaveChanges();
}
}
/// <summary>
/// Create a new group
/// </summary>
/// <param name="userId">Id of the user, who wants to create the group</param>
/// <param name="groupName">The name of the new group which is created</param>
/// <param name="isPrivate">Specifies if the group should be private or not</param>
/// <returns>A groupModel of the new group</returns>
public static GroupModel CreateGroup(string userId, string groupName, bool isPrivate)
{
using (var ctx = new PiChatDbContext())
{
var group = new Group {
Name = groupName, OwnerId = userId, Description = "", IsPrivate = isPrivate
};
ctx.Groups.Add(group);
var groupMembership = new GroupMembership {
UserId = userId, Group = group, Role = GroupMembershipRole.Owner
};
ctx.GroupMemberships.Add(groupMembership);
ctx.SaveChanges();
return(ctx.Groups.Include(g => g.Owner)
.Include(g => g.Members)
.Single(g => g.Id == group.Id)
.MapTo(g => new GroupModel
{
OwnerName = g.Owner.Name,
Role = GroupMembershipRole.Owner,
MembersCount = 1,
PicturesCount = 0
}));
}
}
/// <summary>
/// Remove the specified image
/// </summary>
/// <param name="imageId">Specifies the image</param>
/// <param name="userId">Specifies the user who executes the query</param>
/// <returns></returns>
public static ImageModel RemoveImage(int imageId, string userId)
{
using (var ctx = new PiChatDbContext())
{
//TODO Admin is és csoport tulaj is tudjon törölni
var image = ctx.Images.Find(imageId);
if (image == null)
{
throw new PiChatEntityNotFoundException();
}
if (ctx.GroupMemberships.Find(image.GroupId, userId).Role >= GroupMembershipRole.Administrator || image.OwnerId == userId)
{
ctx.Images.Remove(image);
ctx.SaveChanges();
}
else
{
throw new PiChatNotAuthorizedException();
}
return(image.MapTo(i => new ImageModel
{
ImageId = i.Id
}));
}
}
/// <summary>
/// Changes a membership role from pending to member
/// </summary>
/// <param name="membershipId">Specifies the entry in the membership table</param>
/// <param name="userId">Specifies the user who executes the query</param>
/// <returns> </returns>
public static void AcceptMembershipRequests(int membershipId, string userId)
{
using (var ctx = new PiChatDbContext())
{
var membership = ctx.GroupMemberships
.Where(gm => gm.GroupMembershipId == membershipId && gm.Role == GroupMembershipRole.Pending).FirstOrDefault();
if (membership == null)
{
throw new PiChatEntityNotFoundException();
}
var admin = ctx.GroupMemberships.Find(membership.GroupId, userId);
if (admin == null)
{
throw new PiChatEntityNotFoundException();
}
if (admin.Role < GroupMembershipRole.Administrator)
{
throw new PiChatNotAuthorizedException();
}
membership.Role = GroupMembershipRole.Member;
ctx.SaveChanges();
}
}
/// <summary>
/// Deletes an entry from the membership table given by a membershipId where the role is pending
/// </summary>
/// <param name="membershipId">Specifies the entry in the membership table</param>
/// <param name="userId">Specifies the user who executes the query</param>
/// <returns> </returns>
public static void RejectMembershipRequests(int membershipId, string userId)
{
using (var ctx = new PiChatDbContext())
{
// REVIEW: Select(x => x) ?
//solved --vazul eltávolítottam a fölös selectet
var membership = ctx.GroupMemberships
.Where(gm => gm.GroupMembershipId == membershipId && gm.Role == GroupMembershipRole.Pending).FirstOrDefault();
if (membership == null)
{
throw new PiChatEntityNotFoundException();
}
var admin = ctx.GroupMemberships.Find(membership.GroupId, userId);
if (admin == null)
{
throw new PiChatEntityNotFoundException();
}
if (admin.Role < GroupMembershipRole.Administrator)
{
throw new PiChatNotAuthorizedException();
}
ctx.GroupMemberships.Remove(membership);
ctx.SaveChanges();
}
}
/// <summary>
/// Changes the name of the user
/// </summary>
/// <param name="userId">Specifies which users name we want to change</param>
/// <param name="newName">Specifies the new name we want to change the old name to</param>
public void ChangeName(string userId, string newName)
{
using (var ctx = new PiChatDbContext())
{
var user = ctx.Users.Where(u => u.Id == userId).Select(u => u).First();
user.Name = newName;
ctx.SaveChanges();
}
}
/// <summary>
/// Add user to the specified group
/// </summary>
/// <param name="userId">Id of the user, who wants to enter the group</param>
/// <param name="groupId">Id for the group that the user wants to enter to</param>
/// <returns>none</returns>
public static void JoinToGroup(string userId, int groupId)
{
using (var ctx = new PiChatDbContext())
{
GroupMembership membership;
if ((membership = ctx.GroupMemberships.Where(c => (c.UserId == userId && c.GroupId == groupId)).SingleOrDefault()) != null)
{
throw new PiChatGenericException(String.Format("You have {0} role in the group already", membership.Role.ToString()));
}
#region Review
// REVIEW: az üres try-catch mindig gyanús. Also, ismét, SingleOrDefault helyett nekünk összesen egy bool érték kell, erre Any() és All() valók.
//bool isPrivate;
//try
//{
// isPrivate = ctx.Groups.Where(g => g.Id == groupId).Select(g => g.IsPrivate).SingleOrDefault();
//}
//catch
//{
// return;
//}
// Helyette:
//var isPrivate = ctx.Groups.Any(g => g.Id == groupId && g.IsPrivate);
// REVIEW: A group vagy user nem létezését nem kezeljük.
// Mivel nem csinálunk vele semmi többet, ezért a groupMembership változóra nincs szükség.
#endregion
// Review solve: --vazul
if (!ctx.Users.Any(u => u.Id == userId))
{
throw new PiChatEntityNotFoundException( );
}
var group = ctx.Groups.Find(groupId);
if (group == null)
{
throw new PiChatEntityNotFoundException();
}
var groupMembership = new GroupMembership
{
UserId = userId,
GroupId = groupId,
Role = group.IsPrivate ? GroupMembershipRole.Pending : GroupMembershipRole.Member
};
ctx.GroupMemberships.Add(groupMembership);
ctx.SaveChanges();
}
}
/// <summary>
/// Renames a group
/// </summary>
/// <param name="userId">Specifies the user who wants to rename the group</param>
/// <param name="groupId">Specifies which group the user wants to rename</param>
/// <param name="newName">Specifies which name do the user want to rename the group to</param>
public static void RenameGroup(string userId, int groupId, string newName)
{
using (var ctx = new PiChatDbContext())
{
var membership = ctx.GroupMemberships.Include(gm => gm.Group).Where(gm => gm.GroupId == groupId && gm.UserId == userId).SingleOrDefault();
if (membership == null)
{
throw new PiChatEntityNotFoundException();
}
if (membership.Role < GroupMembershipRole.Administrator)
{
throw new PiChatNotAuthorizedException();
}
membership.Group.Name = newName;
ctx.SaveChanges();
var group = ctx.Groups.Single(g => g.Id == groupId);
if (group.OwnerId == userId)
{
group.Name = newName;
ctx.SaveChanges();
}
}
}
/// <summary>
/// Delete the group with the given id, WARNING : WILL CASCADE DELETE
/// </summary>
/// <param name="groupId">Specifies which group we want to delete</param>
/// <param name="userId">Specifies the user who wants to execute the delete</param>
public static void DeleteGroup(int groupId, string userId)
{
using (var ctx = new PiChatDbContext())
{
var group = ctx.Groups.Where(g => g.Id == groupId).SingleOrDefault();
if (group == null)
{
throw new PiChatEntityNotFoundException();
}
if (group.OwnerId != userId)
{
throw new PiChatNotAuthorizedException();
}
ctx.Groups.Remove(group);
ctx.SaveChanges();
}
}
/// <summary>
/// Changes the description of a group
/// </summary>
/// <param name="userId">Specifies the user who wants to change the description of the group</param>
/// <param name="groupId">Specifies which group's description do the user wants to change</param>
/// <param name="newDesc">Specifies which description do the user want to change the group's description to</param>
public static void ChangeDescription(string userId, int groupId, string newDesc)
{
using (var ctx = new PiChatDbContext())
{
var membership = ctx.GroupMemberships.Where(m => m.UserId == userId && m.GroupId == groupId).Include(m => m.Group).SingleOrDefault();
if (membership == null)
{
throw new PiChatEntityNotFoundException();
}
if (membership.Role < GroupMembershipRole.Administrator)
{
throw new PiChatNotAuthorizedException();
}
membership.Group.Description = newDesc;
ctx.SaveChanges();
}
}
/// <summary>
/// Add a new image to the specified group, returns the new image's id
/// </summary>
/// <param name="userId">The user who executes the query</param>
/// <param name="groupId">Specifies the group</param>
/// <param name="imagePath">Specifies the imagePath</param>
/// <param name="description">Specifies a description for the image</param>
/// <param name="uploadTime">specifies the time when the upload happened</param>
/// <returns>The id of the new image</returns>
public static int AddImage(string userId, int groupId, string imagePath, DateTime uploadTime, string description = "")
{
using (var ctx = new PiChatDbContext())
{
var membership = ctx.GroupMemberships.Find(groupId, userId);
if (membership.Role < GroupMembershipRole.Member)
{
throw new PiChatNotAuthorizedException();
}
var image = new Image {
GroupId = groupId, OwnerId = userId, Path = imagePath, UploadTime = uploadTime, Description = description
};
ctx.Images.Add(image);
ctx.SaveChanges();
return(image.Id);
}
}
/// <summary>
/// Change description of the specified image
/// </summary>
/// <param name="imageId">Specifies the image</param>
/// <param name="userId">Specifies the user who executes the query</param>
/// <param name="NewDescription">Specifies the description which we want to change the current description</param>
/// <returns></returns>
public static ImageModel ChangeDescription(string userId, int imageId, string newDescription)
{
using (var ctx = new PiChatDbContext())
{
var image = ctx.Images.Find(imageId);
if (image == null)
{
throw new PiChatEntityNotFoundException();
}
if (ctx.GroupMemberships.Find(image.GroupId, userId).Role >= GroupMembershipRole.Administrator || image.OwnerId == userId)
{
image.Description = newDescription;
ctx.SaveChanges();
}
return(image.MapTo(i => new ImageModel
{
ImageId = i.Id
}));
}
}
/// <summary>
/// Changes a membership role from pending to member
/// </summary>
/// <param name="membersEmail">Specifies the member by his email address</param>
/// <param name="groupId">Specifies which group's member do we want to promote to be one of the group's administrators</param>
/// <param name="userId">Specifies the user who executes the query</param>
public static void GrantAdminPrivilage(string membersEmail, int groupId, string userId)
{
using (var ctx = new PiChatDbContext())
{
var ownerMembership = ctx.GroupMemberships.Find(groupId, userId);
//TODO return custom exception not normal return
if (ownerMembership == null)
{
throw new PiChatEntityNotFoundException();
}
if (ownerMembership.Role != GroupMembershipRole.Owner)
{
throw new PiChatNotAuthorizedException();
}
var membership = ctx.GroupMemberships.Include(m => m.User).Where(m => m.User.Email == membersEmail).Where(m => m.GroupId == groupId).SingleOrDefault();
if (membership == null)
{
throw new PiChatEntityNotFoundException();
}
membership.Role = GroupMembershipRole.Administrator;
ctx.SaveChanges();
}
}