Implement generic repo pattern and unitofwork

GerbilManagerWebAPI/DAL/GenericRepository.cs

@@ -0,0 +1,77 @@
+using System.Linq.Expressions;
+using GerbilManagerWebAPI.Models;
+using Microsoft.EntityFrameworkCore;
+
+namespace GerbilManagerWebAPI.DAL
+{
+    public class GenericRepository<TEntity> where TEntity : class
+    {
+        internal ApplicationContext context;
+        internal DbSet<TEntity> dbSet;
+
+        public GenericRepository(ApplicationContext context)
+        {
+            this.context = context;
+            this.dbSet = context.Set<TEntity>();
+        }
+
+        public virtual IEnumerable<TEntity> Get(
+            Expression<Func<TEntity, bool>> filter = null,
+            Func<IQueryable<TEntity>, IOrderedQueryable<TEntity>> orderBy = null,
+            string includeProperties = "")
+        {
+            IQueryable<TEntity> query = dbSet;
+
+            if (filter != null)
+            {
+                query = query.Where(filter);
+            }
+
+            foreach (var includeProperty in includeProperties.Split
+                (new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries))
+            {
+                query = query.Include(includeProperty);
+            }
+
+            if (orderBy != null)
+            {
+                return orderBy(query).ToList();
+            }
+            else
+            {
+                return query.ToList();
+            }
+        }
+
+        public virtual TEntity GetByID(object id)
+        {
+            return dbSet.Find(id);
+        }
+
+        public virtual void Insert(TEntity entity)
+        {
+            dbSet.Add(entity);
+        }
+
+        public virtual void Delete(object id)
+        {
+            TEntity entityToDelete = dbSet.Find(id);
+            Delete(entityToDelete);
+        }
+
+        public virtual void Delete(TEntity entityToDelete)
+        {
+            if (context.Entry(entityToDelete).State == EntityState.Detached)
+            {
+                dbSet.Attach(entityToDelete);
+            }
+            dbSet.Remove(entityToDelete);
+        }
+
+        public virtual void Update(TEntity entityToUpdate)
+        {
+            dbSet.Attach(entityToUpdate);
+            context.Entry(entityToUpdate).State = EntityState.Modified;
+        }
+    }
+}