feat(03-03): implement StorageHtmlExportService
- Replace string.Empty stub with full BuildHtml implementation
- Self-contained HTML with inline CSS and JS — no external dependencies
- toggle(i) JS function with collapsible subfolder rows (sf-{i} IDs)
- _togIdx counter reset at start of each BuildHtml call (per PS pattern)
- RenderNode/RenderChildNode for recursive tree rendering
- FormatSize helper: B/KB/MB/GB adaptive display
- HtmlEncode via System.Net.WebUtility
- Add explicit System.IO using (required in WPF project)
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Dev
@@ -1,14 +1,178 @@
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using SharepointToolbox.Core.Models;
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using System.IO;
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using System.Text;
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namespace SharepointToolbox.Services.Export;
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/// <summary>
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/// Exports StorageNode tree to a self-contained HTML file with collapsible subfolder rows.
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/// Port of PS Export-StorageToHTML (PS lines 1621-1780).
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/// Uses a toggle(i) JS pattern where each collapsible row has id="sf-{i}".
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/// </summary>
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public class StorageHtmlExportService
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{
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public string BuildHtml(IReadOnlyList<StorageNode> nodes) => string.Empty; // implemented in Plan 03-03
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private int _togIdx;
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public string BuildHtml(IReadOnlyList<StorageNode> nodes)
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{
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_togIdx = 0;
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var sb = new StringBuilder();
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sb.AppendLine("""
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>SharePoint Storage Metrics</title>
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<style>
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body { font-family: 'Segoe UI', Arial, sans-serif; font-size: 13px; margin: 20px; background: #f5f5f5; }
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h1 { color: #0078d4; }
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table { border-collapse: collapse; width: 100%; background: #fff; box-shadow: 0 1px 3px rgba(0,0,0,.15); }
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th { background: #0078d4; color: #fff; padding: 8px 12px; text-align: left; font-weight: 600; }
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td { padding: 6px 12px; border-bottom: 1px solid #e0e0e0; vertical-align: top; }
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tr:hover { background: #f0f7ff; }
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.toggle-btn { background: none; border: 1px solid #0078d4; color: #0078d4; border-radius: 3px;
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cursor: pointer; font-size: 11px; padding: 1px 6px; margin-right: 6px; }
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.toggle-btn:hover { background: #e5f1fb; }
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.sf-tbl { width: 100%; border: none; box-shadow: none; margin: 0; }
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.sf-tbl td { background: #fafcff; font-size: 12px; }
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.num { text-align: right; font-variant-numeric: tabular-nums; }
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.generated { font-size: 11px; color: #888; margin-top: 12px; }
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</style>
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<script>
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function toggle(i) {
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var row = document.getElementById('sf-' + i);
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if (row) row.style.display = (row.style.display === 'none' || row.style.display === '') ? 'table-row' : 'none';
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}
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</script>
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</head>
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<body>
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<h1>SharePoint Storage Metrics</h1>
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""");
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sb.AppendLine("""
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<table>
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<thead>
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<tr>
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<th>Library / Folder</th>
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<th>Site</th>
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<th class="num">Files</th>
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<th class="num">Total Size</th>
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<th class="num">Version Size</th>
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<th>Last Modified</th>
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</tr>
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</thead>
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<tbody>
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""");
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foreach (var node in nodes)
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{
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RenderNode(sb, node);
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}
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sb.AppendLine("""
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</tbody>
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</table>
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""");
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sb.AppendLine($"<p class=\"generated\">Generated: {DateTime.Now:yyyy-MM-dd HH:mm}</p>");
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sb.AppendLine("</body></html>");
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return sb.ToString();
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}
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public async Task WriteAsync(IReadOnlyList<StorageNode> nodes, string filePath, CancellationToken ct)
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{
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var html = BuildHtml(nodes);
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await System.IO.File.WriteAllTextAsync(filePath, html, System.Text.Encoding.UTF8, ct);
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await File.WriteAllTextAsync(filePath, html, Encoding.UTF8, ct);
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}
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// ── Private rendering ────────────────────────────────────────────────────
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private void RenderNode(StringBuilder sb, StorageNode node)
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{
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bool hasChildren = node.Children.Count > 0;
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int myIdx = hasChildren ? ++_togIdx : 0;
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string nameCell = hasChildren
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? $"<button class=\"toggle-btn\" onclick=\"toggle({myIdx})\">▶</button>{HtmlEncode(node.Name)}"
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: $"<span style=\"margin-left:{node.IndentLevel * 16}px\">{HtmlEncode(node.Name)}</span>";
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string lastMod = node.LastModified.HasValue
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? node.LastModified.Value.ToString("yyyy-MM-dd")
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: string.Empty;
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sb.AppendLine($"""
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<tr>
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<td>{nameCell}</td>
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<td>{HtmlEncode(node.SiteTitle)}</td>
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<td class="num">{node.TotalFileCount:N0}</td>
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<td class="num">{FormatSize(node.TotalSizeBytes)}</td>
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<td class="num">{FormatSize(node.VersionSizeBytes)}</td>
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<td>{lastMod}</td>
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</tr>
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""");
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if (hasChildren)
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{
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sb.AppendLine($"<tr id=\"sf-{myIdx}\" style=\"display:none\"><td colspan=\"6\" style=\"padding:0\">");
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sb.AppendLine("<table class=\"sf-tbl\"><tbody>");
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foreach (var child in node.Children)
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{
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RenderChildNode(sb, child);
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}
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sb.AppendLine("</tbody></table>");
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sb.AppendLine("</td></tr>");
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}
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}
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private void RenderChildNode(StringBuilder sb, StorageNode node)
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{
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bool hasChildren = node.Children.Count > 0;
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int myIdx = hasChildren ? ++_togIdx : 0;
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string indent = $"margin-left:{(node.IndentLevel + 1) * 16}px";
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string nameCell = hasChildren
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? $"<span style=\"{indent}\"><button class=\"toggle-btn\" onclick=\"toggle({myIdx})\">▶</button>{HtmlEncode(node.Name)}</span>"
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: $"<span style=\"{indent}\">{HtmlEncode(node.Name)}</span>";
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string lastMod = node.LastModified.HasValue
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? node.LastModified.Value.ToString("yyyy-MM-dd")
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: string.Empty;
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sb.AppendLine($"""
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<tr>
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<td>{nameCell}</td>
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<td>{HtmlEncode(node.SiteTitle)}</td>
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<td class="num">{node.TotalFileCount:N0}</td>
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<td class="num">{FormatSize(node.TotalSizeBytes)}</td>
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<td class="num">{FormatSize(node.VersionSizeBytes)}</td>
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<td>{lastMod}</td>
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</tr>
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""");
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if (hasChildren)
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{
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sb.AppendLine($"<tr id=\"sf-{myIdx}\" style=\"display:none\"><td colspan=\"6\" style=\"padding:0\">");
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sb.AppendLine("<table class=\"sf-tbl\"><tbody>");
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foreach (var child in node.Children)
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{
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RenderChildNode(sb, child);
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}
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sb.AppendLine("</tbody></table>");
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sb.AppendLine("</td></tr>");
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}
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}
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private static string FormatSize(long bytes)
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{
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if (bytes >= 1_073_741_824L) return $"{bytes / 1_073_741_824.0:F2} GB";
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if (bytes >= 1_048_576L) return $"{bytes / 1_048_576.0:F2} MB";
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if (bytes >= 1024L) return $"{bytes / 1024.0:F2} KB";
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return $"{bytes} B";
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}
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private static string HtmlEncode(string value)
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=> System.Net.WebUtility.HtmlEncode(value ?? string.Empty);
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}
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