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