Fixed the Agenda Planner and ERI Server assistants losing parts of your input (#1142)

app/MindWork AI Studio/Assistants/ERI/ERIServerFileList.cs

@@ -0,0 +1,60 @@
+using System.Text.Json;
+
+namespace AIStudio.Assistants.ERI;
+
+/// <summary>
+/// The files which the model of the ERI Server assistant wants to create.
+/// </summary>
+/// <remarks>
+/// The model answers with a JSON object of the form {"files": ["path/to/file1", "path/to/file2"]}. Up to
+/// v26.10.1, the assistant asked for invalid JSON, an object holding a bare list, and took every string of
+/// the answer for a file, apart from the word "files". A path with a space was lost, while any other key
+/// the model came up with became a file.
+/// </remarks>
+internal sealed class ERIServerFileList
+{
+    private static readonly JsonSerializerOptions JSON_OPTIONS = new()
+    {
+        PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
+        AllowTrailingCommas = false,
+        ReadCommentHandling = JsonCommentHandling.Disallow,
+        MaxDepth = 8,
+    };
+
+    /// <summary>
+    /// The paths of the files, relative to the base directory.
+    /// </summary>
+    public List<string>? Files { get; init; }
+
+    /// <summary>
+    /// Reads the list of files out of the answer of the model.
+    /// </summary>
+    /// <param name="answer">The answer of the model to the request for the list of files.</param>
+    /// <param name="files">The paths of the files, without empty ones, or an empty list when the answer
+    /// holds none.</param>
+    /// <returns>True, when the answer holds a list with at least one file.</returns>
+    public static bool TryParse(string answer, out IReadOnlyList<string> files)
+    {
+        files = [];
+        var json = ModelAnswerJson.ExtractObject(answer);
+        if (json.IsWhiteSpace())
+            return false;
+
+        ERIServerFileList? parsed;
+        try
+        {
+            parsed = JsonSerializer.Deserialize<ERIServerFileList>(json, JSON_OPTIONS);
+        }
+        catch (JsonException)
+        {
+            return false;
+        }
+
+        var paths = parsed?.Files?.Where(file => !string.IsNullOrWhiteSpace(file)).ToList() ?? [];
+        if (paths.Count is 0)
+            return false;
+
+        files = paths;
+        return true;
+    }
+}