JMR-devandClaude Opus 4.8
ee0bbacb98
The data layer, background sync, and IDLE already handled N accounts; this makes the UI account-aware. - Mailbox: filter chips (All + one per account) appear once 2+ accounts exist, and each message in the unified view is labelled with its account. The filter resets to All if the selected account is removed. - Reply now carries the receiving account through to compose, so From defaults to the account that received the message rather than just the first account. - Removing an account now also deletes its cached messages and attachments, so they leave the unified inbox. - assemble/test/lint green; verified on the Android 17 emulator — added a second GreenMail account, saw both accounts' mail unified + attributed, filtered to one account, and replied from the correct account. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
107 lines
4.5 KiB
Markdown
107 lines
4.5 KiB
Markdown
<!-- SPDX-License-Identifier: GPL-3.0-or-later -->
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# LibreMail
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A free and open-source email client for Android, built with Kotlin, Jetpack
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Compose and Material 3 (Material You). LibreMail aims for a friendly default
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experience with power-user features tucked under an **Advanced Settings** group.
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> Status: **in development.** Material You shell; **account setup** (Gmail OAuth via
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> AppAuth/PKCE and generic IMAP/SMTP, with a live connection test and Keystore-
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> encrypted credentials); **IMAP receive** — background sync (WorkManager) into a local
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> Room cache with pull-to-refresh; and **reading** — message bodies fetched on open and
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> rendered in a hardened WebView (JavaScript off, remote images blocked by default),
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> with mark-read, star, and delete; and **composing** — a compose screen with device-
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> contacts autocomplete that sends over SMTP, plus reply; **on-device new-mail
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> notifications** (no push service) with persisted settings; **instant push** via a
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> foreground **IMAP IDLE** service; **attachments** — downloaded on demand and opened in a
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> system viewer; and **multiple accounts** — a unified inbox with per-account filtering.
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> Outlook Graph send and search are upcoming.
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## Features (target MVP)
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- Send and receive email with **Gmail** (OAuth 2.0) and **any IMAP/SMTP** provider.
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- Material You dynamic theming, light/dark, edge-to-edge.
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- Clean compose screen with phone/account contacts integration.
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- Modern security: OAuth 2.0 Authorization Code + PKCE, no stored passwords for Gmail.
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## Tech stack
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| Area | Choice |
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|---|---|
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| Language / UI | Kotlin, Jetpack Compose, Material 3 |
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| Min / target SDK | 33 (Android 13) / 37 (Android 17) |
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| Build | Gradle 9.6, AGP 9.2, Kotlin 2.4.0 (KSP, no KAPT) |
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| DI | Hilt |
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| Local cache | Room (single source of truth) + DataStore |
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| Async / sync | Coroutines + Flow, WorkManager |
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| Email transport | Jakarta / Angus Mail (IMAP + SMTP, XOAUTH2) |
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| OAuth | AppAuth-Android |
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## Building
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### Prerequisites
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- **Android Studio** (latest) or the command-line Android SDK.
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- **JDK 17–21** for the Gradle daemon. AGP 9.2 does not yet support JDK 25, so if
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your `JAVA_HOME` points at JDK 25, run Gradle with a 17–21 JDK (Android Studio's
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bundled JBR is fine; from the CLI, set `JAVA_HOME` to a JDK 21 install).
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- **Android SDK Platform 37** (`platforms;android-37.0`) and **Build-Tools 37**.
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```bash
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# Install the required SDK packages (accept licenses when prompted):
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sdkmanager "platforms;android-37.0" "build-tools;37.0.0"
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# Build, test and lint the debug variant:
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./gradlew :app:assembleDebug
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./gradlew :app:testDebugUnitTest
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./gradlew :app:lintDebug
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# Install on a connected device / emulator:
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./gradlew :app:installDebug
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```
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`local.properties` (git-ignored) must point `sdk.dir` at your Android SDK; Android
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Studio creates it automatically.
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## Gmail account setup (OAuth client)
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Gmail IMAP/SMTP requires the restricted `https://mail.google.com/` scope. While the
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app is unpublished you can use it in **Testing** mode with up to 100 test users and
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no security assessment; a public Play Store release later requires a Google CASA
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assessment for the restricted scope.
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1. In the [Google Cloud Console](https://console.cloud.google.com/), create a
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project (e.g. *LibreMail*).
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2. **APIs & Services → Library →** enable the **Gmail API**.
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3. **OAuth consent screen:** user type *External*; add the scope
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`https://mail.google.com/`; under **Test users**, add your Google address.
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Leave the app in **Testing**.
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4. **Credentials → Create credentials → OAuth client ID → Android.** Use package
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name `org.libremail.app` and your debug keystore SHA-1:
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```bash
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keytool -list -v -keystore "$HOME/.android/debug.keystore" \
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-alias androiddebugkey -storepass android -keypass android
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```
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5. Copy `secrets.properties.example` to `secrets.properties` (git-ignored) and set
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`GMAIL_OAUTH_CLIENT_ID` to your client ID. The build injects it via `BuildConfig`.
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## Architecture
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Offline-first, unidirectional, layered:
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```
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ui/ Compose screens + ViewModels (MVVM), Navigation Compose, Material You theme
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domain/ Models + repository interfaces
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data/ Room (entities, DAOs, database) + repository implementation (source of truth)
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di/ Hilt modules
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```
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The UI observes Room via `Flow`; later increments add a sync engine (Angus Mail
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over IMAP/SMTP) that writes into Room, and an auth layer (AppAuth + an Android
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Keystore-backed credential store).
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## License
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LibreMail is licensed under the **GNU General Public License v3.0** — see
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[`LICENSE`](LICENSE). SPDX identifier: `GPL-3.0-or-later`.
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