Add sample CSV import mapping logic (#542)

src/AliasVault.Client/Main/Pages/Settings/ImportExport/Components/ImportServiceKeePass.razor

@@ -20,20 +20,71 @@
     {
         Logger.LogInformation($"Processing KeePass file: {e.File.Name}");
 
-        await Task.Delay(500);
+        var importCredentials = new List<ImportCredential>();
 
-        // TODO: Implement actual KeePass file parsing
-        // For now, return a sample credential
-        var importCredentials = new List<ImportCredential>
+        try
         {
-            new()
-            {
-                ServiceName = "Sample Service",
-                Username = "sample_user",
-                Password = "sample_password",
-                Notes = "Imported from KeePass"
+            using var stream = e.File.OpenReadStream();
+            using var reader = new StreamReader(stream);
+
+            // Read and parse header row
+            var headerLine = await reader.ReadLineAsync();
+            if (headerLine == null) {
+                throw new InvalidDataException("CSV file header not found");
             }
-        };
+
+            var headers = headerLine.Split(',')
+                .Select((header, index) => (header.Trim('"'), index))
+                .ToDictionary(h => h.Item1, h => h.index);
+
+            // Validate required headers
+            var requiredHeaders = new[] { "Title", "Username", "Password" };
+            var missingHeaders = requiredHeaders.Where(h => !headers.ContainsKey(h)).ToList();
+            if (missingHeaders.Any())
+            {
+                throw new InvalidDataException(
+                    $"Missing required headers: {string.Join(", ", missingHeaders)}");
+            }
+
+            string? line;
+            while ((line = await reader.ReadLineAsync()) != null)
+            {
+                if (string.IsNullOrWhiteSpace(line)) {
+                    continue;
+                }
+
+                var values = line.Split(',').Select(v => v.Trim('"')).ToArray();
+                if (values.Length < headers.Count) {
+                    continue;
+                }
+
+                // TODO: check how TOTP code should be parsed: can we store the full otpauth:// string
+                // or do we need to extract the secret key only?
+                // TODO: currently the TOTP auth component errors with full otpauth:// string.
+                var credential = new ImportCredential
+                {
+                    ServiceName = values[headers["Title"]],
+                    ServiceUrl = headers.ContainsKey("URL") && !string.IsNullOrEmpty(values[headers["URL"]])
+                        ? values[headers["URL"]]
+                        : string.Empty,
+                    Username = headers.ContainsKey("Email") && !string.IsNullOrEmpty(values[headers["Email"]])
+                        ? values[headers["Email"]]
+                        : values[headers["Username"]],
+                    Password = values[headers["Password"]],
+                    TwoFactorSecret = headers.ContainsKey("OTPAuth") && !string.IsNullOrEmpty(values[headers["OTPAuth"]])
+                        ? values[headers["OTPAuth"]]
+                        : string.Empty,
+                    Notes = headers.ContainsKey("Notes") ? values[headers["Notes"]] : string.Empty
+                };
+
+                importCredentials.Add(credential);
+            }
+        }
+        catch (Exception ex)
+        {
+            Logger.LogError(ex, "Error processing KeePass CSV file");
+            throw;
+        }
 
         _importServiceCard.SetImportedCredentials(importCredentials);
     }