Initial commit

2026-06-02 10:51:14 +02:00
commit d19092c84e
182 changed files with 13757 additions and 0 deletions
@@ -0,0 +1,74 @@
+using System.Text.RegularExpressions;
+
+namespace SharepointToolbox.Web.Core.Helpers;
+
+public static class PermissionEntryHelper
+{
+    private static readonly Regex LimitedAccessWebRegex = new(
+        @"^Limited Access System Group For Web\s+(?<id>[0-9a-fA-F-]{36})\s*$",
+        RegexOptions.Compiled | RegexOptions.IgnoreCase);
+
+    private static readonly Regex LimitedAccessListRegex = new(
+        @"^Limited Access System Group For List\s+(?<id>[0-9a-fA-F-]{36})\s*$",
+        RegexOptions.Compiled | RegexOptions.IgnoreCase);
+
+    private static readonly Regex SharingLinkRegex = new(
+        @"^SharingLinks\.(?<item>[0-9a-fA-F-]{36})\.(?<type>[^.]+)\.(?<share>[0-9a-fA-F-]{36})\s*$",
+        RegexOptions.Compiled | RegexOptions.IgnoreCase);
+
+    public static bool IsExternalUser(string loginName) =>
+        loginName.Contains("#EXT#", StringComparison.OrdinalIgnoreCase);
+
+    public static IReadOnlyList<string> FilterPermissionLevels(IEnumerable<string> levels) =>
+        levels.Where(l => !string.Equals(l, "Limited Access", StringComparison.OrdinalIgnoreCase)).ToList();
+
+    public static bool IsBareLimitedAccessSystemGroup(string name) =>
+        name.Equals("Limited Access System Group", StringComparison.OrdinalIgnoreCase);
+
+    public static SystemGroupClassification Classify(string groupTitle)
+    {
+        if (string.IsNullOrWhiteSpace(groupTitle))
+            return new SystemGroupClassification(SystemGroupKind.None, null, null, null, null, null);
+
+        var trimmed = groupTitle.Trim();
+
+        if (IsBareLimitedAccessSystemGroup(trimmed))
+            return new SystemGroupClassification(SystemGroupKind.LimitedAccessBare, null, null, null, null, null);
+
+        var mWeb = LimitedAccessWebRegex.Match(trimmed);
+        if (mWeb.Success && Guid.TryParse(mWeb.Groups["id"].Value, out var webId))
+            return new SystemGroupClassification(SystemGroupKind.LimitedAccessWeb, webId, null, null, null, null);
+
+        var mList = LimitedAccessListRegex.Match(trimmed);
+        if (mList.Success && Guid.TryParse(mList.Groups["id"].Value, out var listId))
+            return new SystemGroupClassification(SystemGroupKind.LimitedAccessList, null, listId, null, null, null);
+
+        var mShare = SharingLinkRegex.Match(trimmed);
+        if (mShare.Success
+            && Guid.TryParse(mShare.Groups["item"].Value, out var itemId)
+            && Guid.TryParse(mShare.Groups["share"].Value, out var shareId))
+        {
+            return new SystemGroupClassification(
+                SystemGroupKind.SharingLink, null, null, itemId, mShare.Groups["type"].Value, shareId);
+        }
+
+        return new SystemGroupClassification(SystemGroupKind.None, null, null, null, null, null);
+    }
+}
+
+public enum SystemGroupKind
+{
+    None,
+    LimitedAccessBare,
+    LimitedAccessWeb,
+    LimitedAccessList,
+    SharingLink
+}
+
+public readonly record struct SystemGroupClassification(
+    SystemGroupKind Kind,
+    Guid?   WebId,
+    Guid?   ListId,
+    Guid?   ItemUniqueId,
+    string? LinkType,
+    Guid?   ShareId);