refactor(api): extract Gmail DTOs/parsers, batch N+1 loops

- Move inline DTOs to GmailDtos.cs, pure parse helpers to GmailParsing.cs - Batch per-message existence checks in CreateSuggestedJob/RefreshLinkedThreads - Remove redundant second pass in RelinkThread, reuse existing HashSet - Replace ToListAsync+scan with FirstOrDefaultAsync for GmailReviewDecisions lookups Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
2026-07-12 20:17:33 +02:00
parent 4cfdc95b59
commit 3e09e74fc8
4 changed files with 118 additions and 122 deletions
@@ -0,0 +1,114 @@
+namespace JobTrackerApi.Services;
+
+// Pure parsing/formatting helpers used by GmailController, split out for readability (no
+// behaviour change). All are static and side-effect free.
+public static class GmailParsing
+{
+    public static string ApplySyncBoundary(string query, int lookbackDays, bool includeSpamTrash)
+    {
+        var bounded = (query ?? string.Empty).Trim();
+        if (!bounded.Contains("newer_than:", StringComparison.OrdinalIgnoreCase))
+        {
+            bounded = string.IsNullOrWhiteSpace(bounded)
+                ? $"newer_than:{lookbackDays}d"
+                : $"{bounded} newer_than:{lookbackDays}d";
+        }
+
+        if (!includeSpamTrash)
+        {
+            if (!bounded.Contains("in:spam", StringComparison.OrdinalIgnoreCase)) bounded += " -in:spam";
+            if (!bounded.Contains("in:trash", StringComparison.OrdinalIgnoreCase)) bounded += " -in:trash";
+        }
+
+        return bounded.Trim();
+    }
+
+    public static bool LooksLikeJobRelatedThread(IReadOnlyList<GmailQueryMatchedMessage> orderedMessages)
+    {
+        var sample = string.Join("\n", orderedMessages.Select(item => string.Join(" ", new[] { item.Message.Subject, item.Message.From, item.Message.Snippet }.Where(value => !string.IsNullOrWhiteSpace(value)))));
+        if (string.IsNullOrWhiteSpace(sample)) return false;
+        return sample.Contains("interview", StringComparison.OrdinalIgnoreCase)
+            || sample.Contains("application", StringComparison.OrdinalIgnoreCase)
+            || sample.Contains("recruit", StringComparison.OrdinalIgnoreCase)
+            || sample.Contains("role", StringComparison.OrdinalIgnoreCase)
+            || sample.Contains("position", StringComparison.OrdinalIgnoreCase)
+            || sample.Contains("offer", StringComparison.OrdinalIgnoreCase)
+            || sample.Contains("follow up", StringComparison.OrdinalIgnoreCase)
+            || sample.Contains("follow-up", StringComparison.OrdinalIgnoreCase)
+            || sample.Contains("rejection", StringComparison.OrdinalIgnoreCase);
+    }
+
+    public static string ToConfidence(int score)
+    {
+        return score switch
+        {
+            >= 30 => "high",
+            >= 16 => "medium",
+            _ => "low"
+        };
+    }
+
+    public static string? ExtractFirstEmail(string? value)
+    {
+        if (string.IsNullOrWhiteSpace(value)) return null;
+        var match = System.Text.RegularExpressions.Regex.Match(value, @"[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,}", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
+        return match.Success ? match.Value : null;
+    }
+
+    public static string? ExtractRecruiterName(string? value)
+    {
+        if (string.IsNullOrWhiteSpace(value)) return null;
+        var trimmed = value.Split('<')[0].Trim().Trim('"');
+        return string.IsNullOrWhiteSpace(trimmed) || trimmed.Contains('@') ? null : trimmed;
+    }
+
+    public static string? ExtractCompanyName(string? from, string? subject)
+    {
+        var subjectText = (subject ?? string.Empty).Trim();
+        if (!string.IsNullOrWhiteSpace(subjectText))
+        {
+            var parts = subjectText.Split(new[] { '-', '–', '|' }, StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
+            if (parts.Length >= 2) return parts[0];
+        }
+
+        var recruiterName = ExtractRecruiterName(from);
+        return recruiterName is { Length: > 0 } && recruiterName.Contains(' ') ? recruiterName.Split(' ').Last() : null;
+    }
+
+    public static string? ExtractRoleFromSubject(string? subject)
+    {
+        if (string.IsNullOrWhiteSpace(subject)) return null;
+        var trimmed = subject.Trim();
+        if (trimmed.Contains("interview", StringComparison.OrdinalIgnoreCase))
+        {
+            return trimmed.Replace("interview", string.Empty, StringComparison.OrdinalIgnoreCase).Trim(' ', '-', ':');
+        }
+        return trimmed.Length <= 120 ? trimmed : trimmed[..120];
+    }
+
+    public static string BuildPopupHtml(bool success, string message)
+    {
+        var escaped = System.Net.WebUtility.HtmlEncode(message);
+        var status = success ? "connected" : "error";
+        var title = success ? "Gmail connected" : "Gmail connection failed";
+        var serializedMessage = System.Text.Json.JsonSerializer.Serialize(message);
+        return $@"<!doctype html>
+<html>
+<head>
+  <meta charset=""utf-8"" />
+  <title>Gmail connection</title>
+</head>
+<body style=""font-family:Segoe UI,Arial,sans-serif;padding:24px;line-height:1.5;"">
+  <h2>{title}</h2>
+  <p>{escaped}</p>
+  <p>You can close this window.</p>
+  <script>
+    if (window.opener) {{
+      window.opener.postMessage({{ source: 'jobtracker-gmail-oauth', status: '{status}', message: {serializedMessage} }}, '*');
+    }}
+    window.close();
+  </script>
+</body>
+</html>";
+    }
+}