EES-5740 Backend work for filter hierarchies

src/GovUk.Education.ExploreEducationStatistics.Admin/Migrations/ContentMigrations/20241216111431_EES5740_AddFilterHierarchiesColumnToFilesTable.cs

@@ -0,0 +1,33 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+namespace GovUk.Education.ExploreEducationStatistics.Admin.Migrations.ContentMigrations
+{
+    /// <inheritdoc />
+    public partial class EES5740_AddFilterHierarchiesColumnToFilesTable : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "FilterHierarchies",
+                table: "Files",
+                type: "nvarchar(max)",
+                nullable: true,
+                defaultValue: null);
+
+            migrationBuilder.Sql("""
+                                 UPDATE [dbo].[Files]
+                                 SET FilterHierarchies = '[]'
+                                 WHERE Type = 'Data';
+                                 """);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "FilterHierarchies",
+                table: "Files");
+        }
+    }
+}

src/GovUk.Education.ExploreEducationStatistics.Admin/Migrations/ContentMigrations/ContentDbContextModelSnapshot.cs

@@ -439,6 +439,9 @@ protected override void BuildModel(ModelBuilder modelBuilder)
                         .IsRequired()
                         .HasColumnType("nvarchar(max)");
 
+                    b.Property<string>("FilterHierarchies")
+                        .HasColumnType("nvarchar(max)");
+
                     b.Property<Guid?>("ReplacedById")
                         .HasColumnType("uniqueidentifier");
 

src/GovUk.Education.ExploreEducationStatistics.Common/ViewModels/DataSetFileFilterHierarchyViewModel.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+
+namespace GovUk.Education.ExploreEducationStatistics.Common.ViewModels;
+
+public record DataSetFileFilterHierarchyViewModel(
+    Guid RootFilterId,
+    List<Guid> ChildFilterIds,
+    List<Guid> RootOptionIds,
+    List<DataSetFileFilterHierarchyTierViewModel> Tiers
+);
+
+public record DataSetFileFilterHierarchyTierViewModel(
+    int Level,
+    Dictionary<Guid, List<Guid>> Hierarchy
+);

src/GovUk.Education.ExploreEducationStatistics.Content.Model/DataSetFileFilterHierarchy.cs

@@ -0,0 +1,12 @@
+#nullable enable
+using System;
+using System.Collections.Generic;
+
+namespace GovUk.Education.ExploreEducationStatistics.Content.Model;
+
+public record DataSetFileFilterHierarchy(
+    Guid RootFilterId,
+    List<Guid> ChildFilterIds, // in order of the tiers
+    List<Guid> RootOptionIds,
+    List<Dictionary<Guid, List<Guid>>> Tiers // also in order i.e. Tier[0] is root -> childFilterIds[0], Tier[1] is childFilterIds[0] -> childFilterIds[1], etc.
+);

src/GovUk.Education.ExploreEducationStatistics.Content.Model/DataSetFileMeta.cs

@@ -44,6 +44,9 @@ public class FilterMeta
     public string? Hint { get; set; }
 
     public required string ColumnName { get; set; }
+
+    [JsonIgnore]
+    public string? GroupCsvColumn { get; set; }
 }
 
 public class IndicatorMeta

src/GovUk.Education.ExploreEducationStatistics.Content.Model/Database/ContentDbContext.cs

@@ -453,9 +453,13 @@ private static void ConfigureFile(ModelBuilder modelBuilder)
                             ? DateTime.SpecifyKind(v.Value, DateTimeKind.Utc)
                             : null);
                 entity.Property(p => p.DataSetFileMeta)
-                    .HasConversion( // You might want to use EF8 JSON support instead of this
+                    .HasConversion(
                         v => JsonConvert.SerializeObject(v),
                         v => JsonConvert.DeserializeObject<DataSetFileMeta>(v));
+                entity.Property(p => p.FilterHierarchies)
+                    .HasConversion(
+                        v => JsonConvert.SerializeObject(v),
+                        v => JsonConvert.DeserializeObject<List<DataSetFileFilterHierarchy>>(v));
             });
         }
 

src/GovUk.Education.ExploreEducationStatistics.Content.Model/File.cs

@@ -1,5 +1,6 @@
 #nullable enable
 using System;
+using System.Collections.Generic;
 using GovUk.Education.ExploreEducationStatistics.Common.Model;
 
 namespace GovUk.Education.ExploreEducationStatistics.Content.Model
@@ -24,6 +25,8 @@ public class File : ICreatedTimestamp<DateTime?>
 
         public DataSetFileMeta? DataSetFileMeta { get; set; }
 
+        public List<DataSetFileFilterHierarchy>? FilterHierarchies { get; set; }
+
         public Guid? ReplacedById { get; set; }
 
         public File? ReplacedBy { get; set; }