perf(adminui): /scripts lists a projection and loads source per dialog (R04 P8)

The list loaded every script entity including SourceCode to render names and hashes. ScriptListQueries projects {ScriptId, Name, Language, SourceHash} for the list and fetches one script's source when its Source dialog opens, with a generation guard against a superseded open. Refs #745 Claude-Session: https://claude.ai/code/session_01Ub9hGmYLQvn9XETzw7CMsT
2026-10-22 17:30:50 -04:00
parent 8e69118200
commit 10b83d69c5
3 changed files with 138 additions and 11 deletions
@@ -0,0 +1,41 @@
+using Microsoft.EntityFrameworkCore;
+using ZB.MOM.WW.OtOpcUa.Configuration;
+
+namespace ZB.MOM.WW.OtOpcUa.AdminUI.ScriptList;
+
+/// <summary>One row of the <c>/scripts</c> list: everything the list renders, and nothing else.</summary>
+/// <param name="ScriptId">The script's logical id.</param>
+/// <param name="Name">The authored display name.</param>
+/// <param name="Language">The script language (e.g. <c>CSharp</c>).</param>
+/// <param name="SourceHash">The source hash shown abbreviated on the row.</param>
+public sealed record ScriptListRow(string ScriptId, string Name, string Language, string SourceHash);
+
+/// <summary>
+///     Queries behind the <c>/scripts</c> page. The list is a projection that leaves out
+///     <c>SourceCode</c> (R04 P8): loading every script's full source to render names and hashes made
+///     the page cost proportional to the total size of every script in the fleet. The source is fetched
+///     on demand, for one script, when its "Source" dialog opens.
+/// </summary>
+public static class ScriptListQueries
+{
+    /// <summary>Loads the list rows, ordered by name, without any script's source.</summary>
+    /// <param name="db">The config DB context.</param>
+    /// <param name="ct">Cancellation token.</param>
+    /// <returns>The list rows.</returns>
+    public static Task<List<ScriptListRow>> LoadRowsAsync(OtOpcUaConfigDbContext db, CancellationToken ct = default) =>
+        db.Scripts.AsNoTracking()
+            .OrderBy(s => s.Name)
+            .Select(s => new ScriptListRow(s.ScriptId, s.Name, s.Language, s.SourceHash))
+            .ToListAsync(ct);
+
+    /// <summary>Loads one script's source, or null when the script no longer exists.</summary>
+    /// <param name="db">The config DB context.</param>
+    /// <param name="scriptId">The script's logical id.</param>
+    /// <param name="ct">Cancellation token.</param>
+    /// <returns>The source code, or null.</returns>
+    public static Task<string?> LoadSourceAsync(OtOpcUaConfigDbContext db, string scriptId, CancellationToken ct = default) =>
+        db.Scripts.AsNoTracking()
+            .Where(s => s.ScriptId == scriptId)
+            .Select(s => (string?)s.SourceCode)
+            .FirstOrDefaultAsync(ct);
+}