set up postgresql repository

src/Core/Repositories/BaseRepository.cs

@@ -1,7 +1,7 @@
 using System;
 using Dapper;
 
-namespace Bit.Core.Repositories.SqlServer
+namespace Bit.Core.Repositories
 {
     public abstract class BaseRepository
     {

src/Core/Repositories/PostgreSql/BasePostgreSqlRepository.cs

@@ -0,0 +1,28 @@
+using System.Text.RegularExpressions;
+using Dapper;
+
+namespace Bit.Core.Repositories.PostgreSql
+{
+    public abstract class BasePostgreSqlRepository : BaseRepository
+    {
+        static BasePostgreSqlRepository()
+        {
+            // Support snake case property names
+            DefaultTypeMap.MatchNamesWithUnderscores = true;
+        }
+
+        public BasePostgreSqlRepository(string connectionString, string readOnlyConnectionString)
+            : base(connectionString, readOnlyConnectionString)
+        { }
+
+        protected static string SnakeCase(string input)
+        {
+            if(string.IsNullOrWhiteSpace(input))
+            {
+                return input;
+            }
+            var startUnderscores = Regex.Match(input, @"^_+");
+            return startUnderscores + Regex.Replace(input, @"([a-z0-9])([A-Z])", "$1_$2").ToLowerInvariant();
+        }
+    }
+}

src/Core/Repositories/PostgreSql/Repository.cs

@@ -0,0 +1,89 @@
+using System;
+using System.Data;
+using System.Linq;
+using System.Threading.Tasks;
+using Dapper;
+using Bit.Core.Models.Table;
+using Npgsql;
+
+namespace Bit.Core.Repositories.PostgreSql
+{
+    public abstract class Repository<T, TId> : BasePostgreSqlRepository, IRepository<T, TId>
+        where TId : IEquatable<TId>
+        where T : class, ITableObject<TId>
+    {
+        public Repository(string connectionString, string readOnlyConnectionString, string table)
+            : base(connectionString, readOnlyConnectionString)
+        {
+            if(!string.IsNullOrWhiteSpace(table))
+            {
+                Table = table;
+            }
+            else
+            {
+                Table = SnakeCase(typeof(T).Name);
+            }
+        }
+
+        protected string Table { get; private set; }
+
+        public virtual async Task<T> GetByIdAsync(TId id)
+        {
+            using(var connection = new NpgsqlConnection(ConnectionString))
+            {
+                var results = await connection.QueryAsync<T>(
+                    $"{Table}_read_by_id",
+                    new { id = id },
+                    commandType: CommandType.StoredProcedure);
+
+                return results.SingleOrDefault();
+            }
+        }
+
+        public virtual async Task CreateAsync(T obj)
+        {
+            obj.SetNewId();
+            using(var connection = new NpgsqlConnection(ConnectionString))
+            {
+                var results = await connection.ExecuteAsync(
+                    $"{Table}_create",
+                    obj,
+                    commandType: CommandType.StoredProcedure);
+            }
+        }
+
+        public virtual async Task ReplaceAsync(T obj)
+        {
+            using(var connection = new NpgsqlConnection(ConnectionString))
+            {
+                var results = await connection.ExecuteAsync(
+                    $"{Table}_update",
+                    obj,
+                    commandType: CommandType.StoredProcedure);
+            }
+        }
+
+        public virtual async Task UpsertAsync(T obj)
+        {
+            if(obj.Id.Equals(default(TId)))
+            {
+                await CreateAsync(obj);
+            }
+            else
+            {
+                await ReplaceAsync(obj);
+            }
+        }
+
+        public virtual async Task DeleteAsync(T obj)
+        {
+            using(var connection = new NpgsqlConnection(ConnectionString))
+            {
+                await connection.ExecuteAsync(
+                    $"{Table}_delete_by_id",
+                    new { id = obj.Id },
+                    commandType: CommandType.StoredProcedure);
+            }
+        }
+    }
+}