Migration plan v1

Wino.Core.Domain/Interfaces/ILegacyLocalMigrationService.cs

@@ -0,0 +1,12 @@
+using System.Threading;
+using System.Threading.Tasks;
+using Wino.Core.Domain.Models.Accounts;
+
+namespace Wino.Core.Domain.Interfaces;
+
+public interface ILegacyLocalMigrationService
+{
+    Task<LegacyLocalMigrationPreview> DetectAsync(CancellationToken cancellationToken = default);
+    Task<LegacyLocalMigrationResult> ImportAsync(CancellationToken cancellationToken = default);
+    void MarkPromptDeferred();
+}

Wino.Core.Domain/Models/Accounts/LegacyLocalMigrationPreview.cs

@@ -0,0 +1,46 @@
+using System;
+using System.Collections.Generic;
+using Wino.Core.Domain.Enums;
+
+namespace Wino.Core.Domain.Models.Accounts;
+
+public sealed class LegacyLocalMigrationPreview
+{
+    public string SourceDatabasePath { get; init; } = string.Empty;
+    public bool LegacyDatabaseExists { get; init; }
+    public bool HasCompletedMigration { get; init; }
+    public bool IsPromptDeferred { get; init; }
+    public bool ShouldPrompt { get; init; }
+    public int LegacyAccountCount { get; init; }
+    public int ImportableAccountCount { get; init; }
+    public int DuplicateAccountCount { get; init; }
+    public int SkippedAccountCount { get; init; }
+    public int ImportableMergedInboxCount { get; init; }
+    public int SkippedMergedInboxCount { get; init; }
+    public IReadOnlyList<LegacyLocalMigrationProviderCount> ProviderCounts { get; init; } = [];
+    public IReadOnlyList<LegacyLocalMigrationAccountPreview> Accounts { get; init; } = [];
+    public IReadOnlyList<string> Warnings { get; init; } = [];
+
+    public bool HasImportableData => LegacyDatabaseExists && ImportableAccountCount > 0;
+}
+
+public sealed class LegacyLocalMigrationProviderCount
+{
+    public MailProviderType ProviderType { get; init; }
+    public int TotalAccountCount { get; init; }
+    public int ImportableAccountCount { get; init; }
+    public int DuplicateAccountCount { get; init; }
+}
+
+public sealed class LegacyLocalMigrationAccountPreview
+{
+    public Guid LegacyAccountId { get; init; }
+    public string Address { get; init; } = string.Empty;
+    public string DisplayName { get; init; } = string.Empty;
+    public MailProviderType ProviderType { get; init; }
+    public SpecialImapProvider SpecialImapProvider { get; init; }
+    public int Order { get; init; }
+    public bool CanImport { get; init; }
+    public bool IsDuplicate { get; init; }
+    public bool IsCalendarEnabled { get; init; }
+}

Wino.Core.Domain/Models/Accounts/LegacyLocalMigrationResult.cs

@@ -0,0 +1,25 @@
+using System.Collections.Generic;
+using Wino.Core.Domain.Enums;
+
+namespace Wino.Core.Domain.Models.Accounts;
+
+public sealed class LegacyLocalMigrationResult
+{
+    public LegacyLocalMigrationPreview Preview { get; init; } = new();
+    public int ImportedAccountCount { get; init; }
+    public int SkippedDuplicateAccountCount { get; init; }
+    public int FailedAccountCount { get; init; }
+    public int ImportedMergedInboxCount { get; init; }
+    public int SkippedMergedInboxCount { get; init; }
+    public IReadOnlyList<LegacyLocalMigrationFailure> Failures { get; init; } = [];
+    public IReadOnlyList<string> Warnings { get; init; } = [];
+
+    public bool HasImportedData => ImportedAccountCount > 0 || ImportedMergedInboxCount > 0;
+}
+
+public sealed class LegacyLocalMigrationFailure
+{
+    public string Address { get; init; } = string.Empty;
+    public MailProviderType ProviderType { get; init; }
+    public string Message { get; init; } = string.Empty;
+}

Wino.Core.Domain/Translations/en_US/resources.json

@@ -1368,6 +1368,26 @@
     "WelcomeWindow_ImportInProgress": "Importing preferences and accounts...",
     "WelcomeWindow_ImportNoAccountsFound": "No accounts were found to import. If preferences were available, they were restored. Use Get started to add an account manually.",
     "WelcomeWindow_ImportDuplicateAccountsSkipped": "{0} imported accounts are already available on this device. Use Get started to add another account manually if needed.",
+    "LegacyLocalMigration_WelcomeSectionTitle": "Import from your previous Wino version",
+    "LegacyLocalMigration_WelcomeSectionDescription": "Wino found account details in an older local database on this device. Import them now, then sign in again to finish reconnecting each account.",
+    "LegacyLocalMigration_PromptTitle": "Import accounts from your previous Wino version?",
+    "LegacyLocalMigration_ImportAction": "Import previous accounts",
+    "LegacyLocalMigration_PreviewSummary": "Found {0} account(s) ready to import: {1}.",
+    "LegacyLocalMigration_PreviewDuplicateSummary": "{0} account(s) already exist on this device and will be skipped.",
+    "LegacyLocalMigration_PreviewMergedSummary": "{0} merged inbox group(s) can be recreated after import.",
+    "LegacyLocalMigration_Provider_Outlook": "Outlook",
+    "LegacyLocalMigration_Provider_Gmail": "Gmail",
+    "LegacyLocalMigration_Provider_Imap": "IMAP",
+    "LegacyLocalMigration_Warning_OAuth": "Outlook and Gmail accounts will need you to sign in again to restore mail and calendar access.",
+    "LegacyLocalMigration_Warning_Imap": "IMAP and CalDAV passwords are never copied. Open the account settings afterward and enter them again.",
+    "LegacyLocalMigration_Warning_Merged": "Merged inboxes are recreated only when every member account imports successfully.",
+    "LegacyLocalMigration_Warning_SkippedAccounts": "Skipped {0} legacy account(s) because their provider or primary address could not be read safely.",
+    "LegacyLocalMigration_Warning_ReadFailed": "Wino found a previous local database, but it could not be read safely for migration.",
+    "LegacyLocalMigration_ImportAccountsSucceeded": "Imported {0} accounts from the previous local database.",
+    "LegacyLocalMigration_ImportMergedInboxesSucceeded": "Recreated {0} merged inbox group(s).",
+    "LegacyLocalMigration_ImportMergedInboxesSkipped": "Skipped {0} merged inbox group(s) because at least one member account could not be imported.",
+    "LegacyLocalMigration_ImportFailedAccounts": "{0} account(s) could not be imported.",
+    "LegacyLocalMigration_ImportEmpty": "There are no additional legacy accounts to import from this device.",
     "WelcomeWindow_SetupTitle": "Set up your account",
     "WelcomeWindow_SetupSubtitle": "Choose your email provider to get started",
     "WelcomeWindow_AddAccountButton": "Add account",
@@ -1444,6 +1464,7 @@
     "WinoAccount_Management_ExportDialog_AccountsDisclaimer": "Passwords, tokens, and other sensitive information are not synced.",
     "WinoAccount_Management_ExportDialog_AccountsRelogin": "Imported accounts on another PC will still need you to sign in again before they can be used.",
     "WinoAccount_Management_ExportDialog_InProgress": "Exporting your selected Wino data...",
+    "LegacyLocalMigration_SettingsSectionTitle": "Import from a previous Wino version",
     "WinoAccount_Management_LocalDataSectionTitle": "Transfer with a JSON file",
     "WinoAccount_Management_LocalDataSectionDescription": "Import from or export to a local JSON file. Passwords, tokens, and other sensitive information are not included.",
     "WinoAccount_Management_LocalDataImportAction": "Import",