Added support for MySQL and ProgreSQL and AddSite/Tenant

Oqtane.Shared/Shared/OqtaneDatabaseBase.cs

@@ -0,0 +1,59 @@
+using System;
+using System.Collections.Generic;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Migrations.Operations;
+using Microsoft.EntityFrameworkCore.Migrations.Operations.Builders;
+using Oqtane.Interfaces;
+using Oqtane.Models;
+
+namespace Oqtane.Shared
+{
+    public abstract class OqtaneDatabaseBase : IOqtaneDatabase
+    {
+        protected OqtaneDatabaseBase(string name, string friendlyName, List<ConnectionStringField> connectionStringFields)
+        {
+            Name = name;
+            FriendlyName = friendlyName;
+            ConnectionStringFields = connectionStringFields;
+        }
+
+        public  string FriendlyName { get; }
+
+        public string Name { get; }
+
+        public abstract string Provider { get; }
+
+        public List<ConnectionStringField> ConnectionStringFields { get; }
+
+        public abstract OperationBuilder<AddColumnOperation> AddAutoIncrementColumn(ColumnsBuilder table, string name);
+
+        public abstract string BuildConnectionString();
+
+        public virtual string ConcatenateSql(params string[] values)
+        {
+            var returnValue = String.Empty;
+            for (var i = 0; i < values.Length; i++)
+            {
+                if (i > 0)
+                {
+                    returnValue += " + ";
+                }
+                returnValue += values[i];
+            }
+
+            return returnValue;
+        }
+
+        public virtual string RewriteName(string name)
+        {
+            return name;
+        }
+
+        public virtual void UpdateIdentityStoreTableNames(ModelBuilder builder)
+        {
+
+        }
+
+        public abstract DbContextOptionsBuilder UseDatabase(DbContextOptionsBuilder optionsBuilder, string connectionString);
+    }
+}