# Chrono Mail - Phase 0 (Proof of Concept)

## Goal

Build a minimal working email client.

Features:

* Google Login
* Generic IMAP Login
* Fetch Inbox
* Read Email
* Send Email
* Download Attachments
* Local Cache
* Offline Reading
* Background Sync (basic)
* Local Notifications

Ignore

* Clean Architecture
* Plugin System
* AI
* Encryption
* Remote Config
* Themes
* Backend
* Advanced UI

---

# Flutter Version

Latest Stable

---

# Packages

## Authentication

```yaml
google_sign_in:
flutter_appauth:
flutter_secure_storage:
```

---

## Email

```yaml
enough_mail:
mailer:
```

---

## State

```yaml
flutter_riverpod:
riverpod_annotation:
riverpod_generator:
```

---

## Database

```yaml
objectbox:
objectbox_flutter_libs:
```

---

## Network

```yaml
dio:
connectivity_plus:
```

---

## Notifications

```yaml
flutter_local_notifications:
workmanager:
```

---

## Utilities

```yaml
logger:
path_provider:
file_picker:
permission_handler:
intl:
uuid:
collection:
```

---

# Folder Structure

```text
lib/

main.dart

app.dart

core/

models/

services/

providers/

pages/

widgets/

database/
```

---

# Models

## EmailAccount

Fields

```
id

email

displayName

provider

accessToken

refreshToken
```

---

## EmailFolder

```
id

name

unreadCount
```

---

## EmailMessage

```
id

folderId

subject

from

to

cc

bcc

body

htmlBody

date

isRead

isStarred

hasAttachment
```

---

## Attachment

```
id

emailId

name

size

mimeType

path
```

---

# Services

## AuthService

Methods

```
loginGoogle()

loginImap()

logout()

refreshToken()
```

---

## MailService

Methods

```
connect()

disconnect()

fetchFolders()

fetchInbox()

fetchMessage()

fetchAttachments()

downloadAttachment()

sendEmail()

delete()

move()

markRead()

search()

idle()
```

---

## DatabaseService

Methods

```
saveEmails()

getEmails()

getEmail()

saveFolders()

saveAttachments()

delete()

clear()
```

---

## NotificationService

Methods

```
initialize()

showNewMail()
```

---

## BackgroundSyncService

Methods

```
start()

stop()

sync()
```

---

# Riverpod Providers

```
authProvider

mailProvider

databaseProvider

notificationProvider

backgroundSyncProvider
```

---

# Pages

```
SplashPage

LoginPage

AccountsPage

InboxPage

EmailViewPage

ComposePage

SettingsPage
```

---

# Flow

```
Splash

↓

Check Login

↓

Login

↓

Fetch Inbox

↓

Save to ObjectBox

↓

Open Inbox

↓

Open Email

↓

Read Body

↓

Compose

↓

Send
```

---

# Sync

Every app launch

```
Connect

↓

Fetch latest emails

↓

Compare IDs

↓

Save new emails

↓

Notify UI
```

---

# Background

Use

```
Workmanager

↓

Run sync

↓

Show Local Notification
```

---

# ObjectBox

Create Boxes

```
Accounts

Folders

Emails

Attachments
```

---

# MVP Checklist

* Google Login
* Generic IMAP Login
* Fetch Inbox
* Read Email
* Compose
* Send Email
* Local Database
* Offline Reading
* Attachment Download
* Background Sync
* Local Notification

---

# Ignore Until Phase 1

* Clean Architecture
* SOLID
* Modularization
* Plugin System
* AI
* Encryption
* Remote Config
* Logging
* Testing
* Animations
* Responsive Layout
* Multiple Accounts
* Threading
* Search
* Themes
* Push Notifications
* Backend

Goal is only to prove that the complete email flow works.