44913f8075
- GroupBy (Users, PermissionLevels, GrantedThrough) to merge duplicate entries - Pipe-joins URLs and Titles for merged rows - RFC 4180 CSV escaping: all fields double-quoted, internal quotes doubled - WriteAsync uses UTF-8 with BOM for Excel compatibility - All 3 CsvExportServiceTests pass
68 lines
2.7 KiB
C#
68 lines
2.7 KiB
C#
using System.IO;
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using System.Text;
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using SharepointToolbox.Core.Models;
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namespace SharepointToolbox.Services.Export;
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/// <summary>
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/// Exports permission entries to CSV format.
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/// Ports PowerShell Merge-PermissionRows + Export-Csv functionality.
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/// </summary>
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public class CsvExportService
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{
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private const string Header =
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"\"Object\",\"Title\",\"URL\",\"HasUniquePermissions\",\"Users\",\"UserLogins\",\"Type\",\"Permissions\",\"GrantedThrough\"";
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/// <summary>
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/// Builds a CSV string from the supplied permission entries.
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/// Merges rows with identical (Users, PermissionLevels, GrantedThrough) by pipe-joining URLs and Titles.
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/// </summary>
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public string BuildCsv(IReadOnlyList<PermissionEntry> entries)
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{
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var sb = new StringBuilder();
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sb.AppendLine(Header);
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// Merge: group by (Users, PermissionLevels, GrantedThrough) — port of PS Merge-PermissionRows
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var merged = entries
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.GroupBy(e => (e.Users, e.PermissionLevels, e.GrantedThrough))
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.Select(g => new
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{
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ObjectType = g.First().ObjectType,
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Title = string.Join(" | ", g.Select(e => e.Title).Distinct()),
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Url = string.Join(" | ", g.Select(e => e.Url).Distinct()),
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HasUnique = g.First().HasUniquePermissions,
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Users = g.Key.Users,
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UserLogins = g.First().UserLogins,
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PrincipalType = g.First().PrincipalType,
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Permissions = g.Key.PermissionLevels,
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GrantedThrough = g.Key.GrantedThrough
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});
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foreach (var row in merged)
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sb.AppendLine(string.Join(",", new[]
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{
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Csv(row.ObjectType), Csv(row.Title), Csv(row.Url),
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Csv(row.HasUnique.ToString()), Csv(row.Users), Csv(row.UserLogins),
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Csv(row.PrincipalType), Csv(row.Permissions), Csv(row.GrantedThrough)
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}));
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return sb.ToString();
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}
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/// <summary>
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/// Writes the CSV to the specified file path using UTF-8 with BOM (for Excel compatibility).
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/// </summary>
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public async Task WriteAsync(IReadOnlyList<PermissionEntry> entries, string filePath, CancellationToken ct)
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{
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var csv = BuildCsv(entries);
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await File.WriteAllTextAsync(filePath, csv, new UTF8Encoding(encoderShouldEmitUTF8Identifier: true), ct);
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}
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/// <summary>RFC 4180 CSV field escaping: wrap in double quotes, double internal quotes.</summary>
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private static string Csv(string value)
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{
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if (string.IsNullOrEmpty(value)) return "\"\"";
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return $"\"{value.Replace("\"", "\"\"")}\"";
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}
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}
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