Add IsAdmin & IsAuthor checks (#111)

* Add IsAdmin, IsAuthor, and GetPuzzles methods
* Add xml comments
* Migration to remove EventOwners and add Events table
* Move GetPuzzlesFor Author out of data model.

Data/DataModel/EventAdmins.cs

@@ -11,7 +11,7 @@ public class EventAdmins
         /// Foreign key - event table
         /// </summary
         [ForeignKey("Event.ID")]
-        public virtual EventOwners Event { get; set; }
+        public virtual Event Event { get; set; }
 
         /// <summary>
         /// Foreign key - user table

Data/DataModel/PuzzleUser.cs

@@ -1,4 +1,5 @@
-using System.ComponentModel.DataAnnotations;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
 using System.Linq;
 using Microsoft.AspNetCore.Identity;
@@ -32,5 +33,25 @@ public static PuzzleUser GetPuzzleUser(string identityUserId, PuzzleServerContex
         {
             return dbContext.PuzzleUsers.Where(user => user.IdentityUserId == identityUserId).FirstOrDefault();
         }
+
+        /// <summary>
+        /// Returns whether or not a user is an author for the given event
+        /// </summary>
+        /// <param name="thisEvent">The event that's being checked</param>
+        /// <param name="puzzleServerContext">Current PuzzleServerContext</param>
+        public bool IsAuthorForEvent(PuzzleServerContext puzzleServerContext, Event thisEvent)
+        {
+            return puzzleServerContext.EventAuthors.Where(a => a.Author.ID == ID && a.Event.ID == thisEvent.ID).Any();
+        }
+
+        /// <summary>
+        /// Returns whether or not a user is an admin for the given event
+        /// </summary>
+        /// <param name="thisEvent">The event that's being checked</param>
+        /// <param name="puzzleServerContext">Current PuzzleServerContext</param>
+        public bool IsAdminForEvent (PuzzleServerContext dbContext, Event thisEvent)
+        {
+            return dbContext.EventAdmins.Where(a => a.Admin.ID == ID && a.Event.ID == thisEvent.ID).Any();
+        }
     }
 }

Data/IPuzzleServerContext.cs

@@ -7,7 +7,6 @@ public interface IPuzzleServerContext
         DbSet<Event> Events { get; set; }
         DbSet<EventAdmins> EventAdmins { get; set; }
         DbSet<EventAuthors> EventAuthors { get; set; }
-        DbSet<EventOwners> EventOwners { get; set; }
         DbSet<EventTeams> EventTeams { get; set; }
         DbSet<Feedback> Feedback { get; set; }
         DbSet<Invitation> Invitations { get; set; }