EES-5738 Add filtering by geographic level for Data Catalogue page

src/GovUk.Education.ExploreEducationStatistics.Admin/Controllers/Api/DataSetFileGeographicLevelsMigrationController.cs

@@ -0,0 +1,85 @@
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using GovUk.Education.ExploreEducationStatistics.Admin.Models;
+using GovUk.Education.ExploreEducationStatistics.Common.Extensions;
+using GovUk.Education.ExploreEducationStatistics.Common.Model;
+using GovUk.Education.ExploreEducationStatistics.Content.Model;
+using GovUk.Education.ExploreEducationStatistics.Content.Model.Database;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+
+namespace GovUk.Education.ExploreEducationStatistics.Admin.Controllers.Api;
+
+[Route("api")]
+[ApiController]
+[Authorize(Roles = GlobalRoles.RoleNames.BauUser)]
+public class DataSetFileMetaMigrationController(ContentDbContext contentDbContext) : ControllerBase
+{
+    public class MigrationResult
+    {
+        public bool IsDryRun;
+        public int Processed;
+        public string Errors;
+    }
+
+    [HttpPut("bau/migrate-datasetfile-geographiclevels")]
+    public async Task<MigrationResult> DataSetFileVersionGeographicLevelsMigration(
+        [FromQuery] bool isDryRun = true,
+        [FromQuery] int? num = null,
+        CancellationToken cancellationToken = default)
+    {
+        var queryable = contentDbContext.Files
+            .Where(f => f.Type == FileType.Data
+                        && f.DataSetFileVersionGeographicLevels.Count == 0);
+
+        if (num != null)
+        {
+            queryable = queryable.Take(num.Value);
+        }
+
+        var files = queryable.ToList();
+
+        var numProcessed = 0;
+        List<string> errors = [];
+
+        foreach (var file in files)
+        {
+            var meta = file.DataSetFileMeta;
+
+            if (meta == null)
+            {
+                errors.Add($"No DataSetFileMeta found for File {file.Id}");
+                continue;
+            }
+
+            var dataSetFileVersionGeographicLevels = meta!.GeographicLevels
+                .Distinct()
+                .Select(gl => new DataSetFileVersionGeographicLevel
+                {
+                    DataSetFileVersionId = file.Id,
+                    GeographicLevel = gl,
+                })
+                .ToList();
+
+            contentDbContext.DataSetFileVersionGeographicLevels.AddRange(
+                dataSetFileVersionGeographicLevels);
+
+            numProcessed++;
+        }
+
+        if (!isDryRun)
+        {
+            await contentDbContext.SaveChangesAsync(cancellationToken);
+        }
+
+        return new MigrationResult
+        {
+            IsDryRun = isDryRun,
+            Processed = numProcessed,
+            Errors = errors.IsNullOrEmpty() ? "No errors" : errors.JoinToString("\n"),
+        };
+    }
+
+}