feat: add SiteNotificationRepository and SMTP storage
This commit is contained in:
Joseph Doherty
@@ -0,0 +1,255 @@
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using System.Text.Json;
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using Microsoft.Data.Sqlite;
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using ScadaLink.Commons.Entities.Notifications;
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using ScadaLink.Commons.Interfaces.Repositories;
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using ScadaLink.SiteRuntime.Persistence;
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namespace ScadaLink.SiteRuntime.Repositories;
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/// <summary>
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/// Site-side read-only implementation of <see cref="INotificationRepository"/>
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/// backed by the local SQLite database via <see cref="SiteStorageService"/>.
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/// Write operations throw <see cref="NotSupportedException"/> because site-local
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/// artifacts are managed exclusively through deployment from Central.
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/// </summary>
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public class SiteNotificationRepository : INotificationRepository
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{
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private readonly SiteStorageService _storage;
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public SiteNotificationRepository(SiteStorageService storage)
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{
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_storage = storage ?? throw new ArgumentNullException(nameof(storage));
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}
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// ── NotificationList (read) ──
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public async Task<NotificationList?> GetListByNameAsync(
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string name, CancellationToken cancellationToken = default)
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{
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await using var connection = CreateConnection();
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await connection.OpenAsync(cancellationToken);
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await using var command = connection.CreateCommand();
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command.CommandText = @"
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SELECT name, recipient_emails
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FROM notification_lists
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WHERE name = @name";
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command.Parameters.AddWithValue("@name", name);
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await using var reader = await command.ExecuteReaderAsync(cancellationToken);
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if (!await reader.ReadAsync(cancellationToken))
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return null;
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return MapNotificationList(reader);
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}
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public async Task<IReadOnlyList<NotificationList>> GetAllNotificationListsAsync(
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CancellationToken cancellationToken = default)
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{
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await using var connection = CreateConnection();
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await connection.OpenAsync(cancellationToken);
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await using var command = connection.CreateCommand();
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command.CommandText = "SELECT name, recipient_emails FROM notification_lists";
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var results = new List<NotificationList>();
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await using var reader = await command.ExecuteReaderAsync(cancellationToken);
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while (await reader.ReadAsync(cancellationToken))
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{
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results.Add(MapNotificationList(reader));
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}
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return results;
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}
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public async Task<NotificationList?> GetNotificationListByIdAsync(
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int id, CancellationToken cancellationToken = default)
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{
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// The SQLite table is keyed by name, not by integer ID.
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// Scan all rows and match on the synthetic ID derived from the name.
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var all = await GetAllNotificationListsAsync(cancellationToken);
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return all.FirstOrDefault(l => l.Id == id);
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}
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// ── NotificationRecipient (read) ──
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public async Task<IReadOnlyList<NotificationRecipient>> GetRecipientsByListIdAsync(
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int notificationListId, CancellationToken cancellationToken = default)
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{
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// Find the parent list to get its name, then parse the recipient_emails JSON.
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var list = await GetNotificationListByIdAsync(notificationListId, cancellationToken);
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if (list is null)
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return Array.Empty<NotificationRecipient>();
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await using var connection = CreateConnection();
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await connection.OpenAsync(cancellationToken);
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await using var command = connection.CreateCommand();
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command.CommandText = @"
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SELECT recipient_emails
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FROM notification_lists
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WHERE name = @name";
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command.Parameters.AddWithValue("@name", list.Name);
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var json = (string?)await command.ExecuteScalarAsync(cancellationToken);
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if (string.IsNullOrWhiteSpace(json))
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return Array.Empty<NotificationRecipient>();
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return ParseRecipientEmails(json, notificationListId);
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}
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public async Task<NotificationRecipient?> GetRecipientByIdAsync(
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int id, CancellationToken cancellationToken = default)
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{
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// Scan all lists and their recipients to find the matching synthetic ID.
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var lists = await GetAllNotificationListsAsync(cancellationToken);
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foreach (var list in lists)
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{
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var recipients = await GetRecipientsByListIdAsync(list.Id, cancellationToken);
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var match = recipients.FirstOrDefault(r => r.Id == id);
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if (match is not null)
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return match;
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}
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return null;
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}
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// ── SmtpConfiguration (read) ──
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public async Task<IReadOnlyList<SmtpConfiguration>> GetAllSmtpConfigurationsAsync(
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CancellationToken cancellationToken = default)
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{
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await using var connection = CreateConnection();
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await connection.OpenAsync(cancellationToken);
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await using var command = connection.CreateCommand();
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command.CommandText = @"
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SELECT name, server, port, auth_mode, from_address, username, password, oauth_config
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FROM smtp_configurations";
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var results = new List<SmtpConfiguration>();
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await using var reader = await command.ExecuteReaderAsync(cancellationToken);
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while (await reader.ReadAsync(cancellationToken))
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{
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results.Add(MapSmtpConfiguration(reader));
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}
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return results;
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}
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public async Task<SmtpConfiguration?> GetSmtpConfigurationByIdAsync(
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int id, CancellationToken cancellationToken = default)
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{
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var all = await GetAllSmtpConfigurationsAsync(cancellationToken);
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return all.FirstOrDefault(s => s.Id == id);
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}
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// ── Write operations (not supported on site) ──
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public Task AddNotificationListAsync(NotificationList list, CancellationToken cancellationToken = default)
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=> throw new NotSupportedException("Managed via artifact deployment from Central");
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public Task UpdateNotificationListAsync(NotificationList list, CancellationToken cancellationToken = default)
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=> throw new NotSupportedException("Managed via artifact deployment from Central");
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public Task DeleteNotificationListAsync(int id, CancellationToken cancellationToken = default)
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=> throw new NotSupportedException("Managed via artifact deployment from Central");
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public Task AddRecipientAsync(NotificationRecipient recipient, CancellationToken cancellationToken = default)
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=> throw new NotSupportedException("Managed via artifact deployment from Central");
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public Task UpdateRecipientAsync(NotificationRecipient recipient, CancellationToken cancellationToken = default)
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=> throw new NotSupportedException("Managed via artifact deployment from Central");
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public Task DeleteRecipientAsync(int id, CancellationToken cancellationToken = default)
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=> throw new NotSupportedException("Managed via artifact deployment from Central");
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public Task AddSmtpConfigurationAsync(SmtpConfiguration configuration, CancellationToken cancellationToken = default)
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=> throw new NotSupportedException("Managed via artifact deployment from Central");
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public Task UpdateSmtpConfigurationAsync(SmtpConfiguration configuration, CancellationToken cancellationToken = default)
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=> throw new NotSupportedException("Managed via artifact deployment from Central");
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public Task DeleteSmtpConfigurationAsync(int id, CancellationToken cancellationToken = default)
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=> throw new NotSupportedException("Managed via artifact deployment from Central");
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public Task<int> SaveChangesAsync(CancellationToken cancellationToken = default)
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=> throw new NotSupportedException("Managed via artifact deployment from Central");
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// ── Private helpers ──
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private SqliteConnection CreateConnection()
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{
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var field = typeof(SiteStorageService).GetField("_connectionString",
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System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
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var connectionString = (string)field!.GetValue(_storage)!;
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return new SqliteConnection(connectionString);
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}
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private static NotificationList MapNotificationList(SqliteDataReader reader)
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{
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var name = reader.GetString(0);
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var list = new NotificationList(name)
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{
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Id = GenerateSyntheticId(name)
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};
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// Eagerly populate Recipients from the JSON column.
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var emailsJson = reader.GetString(1);
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var recipients = ParseRecipientEmails(emailsJson, list.Id);
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foreach (var r in recipients)
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{
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list.Recipients.Add(r);
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}
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return list;
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}
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private static IReadOnlyList<NotificationRecipient> ParseRecipientEmails(
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string json, int notificationListId)
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{
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try
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{
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var emails = JsonSerializer.Deserialize<List<string>>(json,
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new JsonSerializerOptions { PropertyNameCaseInsensitive = true });
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if (emails is null)
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return Array.Empty<NotificationRecipient>();
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return emails.Select(email => new NotificationRecipient(
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name: email,
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emailAddress: email)
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{
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Id = GenerateSyntheticId($"{notificationListId}:{email}"),
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NotificationListId = notificationListId
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}).ToList();
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}
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catch (JsonException)
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{
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return Array.Empty<NotificationRecipient>();
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}
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}
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private static SmtpConfiguration MapSmtpConfiguration(SqliteDataReader reader)
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{
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var name = reader.GetString(0);
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return new SmtpConfiguration(
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host: reader.GetString(1),
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authType: reader.GetString(3),
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fromAddress: reader.GetString(4))
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{
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Id = GenerateSyntheticId(name),
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Port = reader.GetInt32(2),
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Credentials = reader.IsDBNull(5) ? null : reader.GetString(5),
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TlsMode = reader.IsDBNull(7) ? null : reader.GetString(7)
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};
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}
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/// <summary>
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/// Generates a stable positive integer ID from a string name.
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/// Uses a hash to produce a deterministic synthetic ID since the SQLite
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/// tables are keyed by name rather than auto-increment integer.
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/// </summary>
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private static int GenerateSyntheticId(string name)
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=> name.GetHashCode() & 0x7FFFFFFF;
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}
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