Added suuport to inject an IOqtaneDatabase in EntityBuilders to allow each Database to control certain Migration behaviors. Also updated Installer to dynamically build Database Configuration section

Oqtane.Database.MySQL/MySQLDatabase.cs

@@ -0,0 +1,66 @@
+using System;
+using System.Collections.Generic;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Migrations.Operations;
+using Microsoft.EntityFrameworkCore.Migrations.Operations.Builders;
+using MySql.EntityFrameworkCore.Metadata;
+using Oqtane.Interfaces;
+using Oqtane.Models;
+
+namespace Oqtane.Database.MySQL
+{
+    public class MySQLDatabase : IOqtaneDatabase
+    {
+        public MySQLDatabase()
+        {
+            ConnectionStringFields = new List<ConnectionStringField>()
+            {
+                new() {Name = "Server", FriendlyName = "Server", Value = "127.0.0.1"},
+                new() {Name = "Port", FriendlyName = "Port", Value = "3306"},
+                new() {Name = "Database", FriendlyName = "Database", Value = "Oqtane-{{Date}}"},
+                new() {Name = "Uid", FriendlyName = "User Id", Value = ""},
+                new() {Name = "Pwd", FriendlyName = "Password", Value = ""}
+            };
+        }
+
+        public string FriendlyName => Name;
+
+        public string Name => "MySQL";
+
+        public string Provider => "MySql.EntityFrameworkCore";
+
+        public List<ConnectionStringField> ConnectionStringFields { get; }
+
+        public OperationBuilder<AddColumnOperation> AddAutoIncrementColumn(ColumnsBuilder table, string name)
+        {
+            return table.Column<int>(name: name, nullable: false).Annotation("MySQL:ValueGenerationStrategy", MySQLValueGenerationStrategy.IdentityColumn);
+        }
+
+        public string BuildConnectionString()
+        {
+            var connectionString = String.Empty;
+
+            var server = ConnectionStringFields[0].Value;
+            var port = ConnectionStringFields[1].Value;
+            var database = ConnectionStringFields[2].Value;
+            var userId = ConnectionStringFields[3].Value;
+            var password = ConnectionStringFields[4].Value;
+
+            if (!String.IsNullOrEmpty(server) && !String.IsNullOrEmpty(database) && !String.IsNullOrEmpty(userId) && !String.IsNullOrEmpty(password))
+            {
+                connectionString = $"Server={server};Database={database};Uid={userId};Pwd={password};";
+            }
+
+            if (!String.IsNullOrEmpty(port))
+            {
+                connectionString += $"Port={port};";
+            }
+            return connectionString;
+        }
+
+        public DbContextOptionsBuilder UseDatabase(DbContextOptionsBuilder optionsBuilder, string connectionString)
+        {
+            return optionsBuilder.UseMySQL(connectionString);
+        }
+    }
+}