Adds Migration Helper methods

src/Our.Umbraco.InnerContent/Helpers/MigrationHelper.cs

@@ -0,0 +1,66 @@
+using System;
+using System.Linq;
+using System.Web;
+using Semver;
+using Umbraco.Core;
+using Umbraco.Core.Logging;
+using Umbraco.Core.Models;
+using Umbraco.Core.Persistence;
+using Umbraco.Core.Persistence.Migrations;
+using Umbraco.Core.Services;
+
+namespace Our.Umbraco.InnerContent.Helpers
+{
+    public static class MigrationHelper
+    {
+        public static void ApplyMigrations(
+            ApplicationContext applicationContext,
+            string migrationName,
+            SemVersion currentVersion,
+            SemVersion targetVersion)
+        {
+            // get the latest migration executed
+            var latestMigration = applicationContext.Services.MigrationEntryService.GetLatest(migrationName);
+
+            if (latestMigration != null)
+                currentVersion = latestMigration.Version;
+
+            if (targetVersion == currentVersion)
+                return;
+
+            var migrationsRunner = new MigrationRunner(
+                applicationContext.Services.MigrationEntryService,
+                applicationContext.ProfilingLogger.Logger,
+                currentVersion,
+                targetVersion,
+                migrationName);
+
+            try
+            {
+                migrationsRunner.Execute(applicationContext.DatabaseContext.Database);
+            }
+            catch (HttpException)
+            {
+                // because umbraco runs some other migrations after the migration runner
+                // is executed we get HttpException
+                // catch this error, but don't do anything
+                // fixed in 7.4.2+ see : http://issues.umbraco.org/issue/U4-8077
+            }
+            catch (Exception ex)
+            {
+                LogHelper.Error(typeof(MigrationHelper), "Error running migration.", ex);
+            }
+        }
+
+        private static IMigrationEntry GetLatest(this IMigrationEntryService service, string migrationName)
+        {
+            // TODO: Figure out if we can use the UnitOfWorkProvider here,
+            // but it appears to be marked as protected within Umbraco Core.
+
+            return service
+                .GetAll(migrationName)
+                .OrderByDescending(x => x.Version)
+                .FirstOrDefault();
+        }
+    }
+}

src/Our.Umbraco.InnerContent/Our.Umbraco.InnerContent.csproj

@@ -81,6 +81,7 @@
     <Compile Include="Bootstrap.cs" />
     <Compile Include="Converters\InnerContentValueConverter.cs" />
     <Compile Include="Helpers\InnerContentHelper.cs" />
+    <Compile Include="Helpers\MigrationHelper.cs" />
     <Compile Include="InnerContentConstants.cs" />
     <Compile Include="Models\DetachedPublishedContent.cs" />
     <Compile Include="Models\DetachedPublishedProperty.cs" />