:feature:messaging
Overview
The :feature:messaging module handles the core communication features of the app, including text messages, direct messages (DMs), and channel-based chat.
Key Components
1. MessageViewModel
Manages the state of the chat screen, including loading messages from the database, sending new messages, and handling message reactions.
2. QuickChat
A simplified chat interface for quickly sending and receiving messages without entering the full message screen.
3. Homoglyph substitution (payload-size optimization)
Uses HomoglyphCharacterStringTransformer (from :core:common) to optionally replace national-alphabet characters with visually identical Latin homoglyphs (e.g. Cyrillic "А" → Latin "A") on outgoing text. This is a preference-gated byte-size optimization — such characters encode smaller in UTF-8, fitting roughly 140-145 characters per message instead of ~115-120. It is not a security or anti-phishing feature.
Features
- Channel Chat: Group communication on public or private channels.
- Direct Messaging: One-on-one encrypted communication between nodes.
- Message Reactions: Support for reacting to messages with emojis.
- Delivery Status: Indicators for "Sent", "Received", and "Read" (ACK/NACK).
Dependency Graph
graph TB
:feature:messaging[messaging]:::kmp-feature
:feature:messaging -.-> :core:common
:feature:messaging -.-> :core:data
:feature:messaging -.-> :core:database
:feature:messaging -.-> :core:domain
:feature:messaging -.-> :core:model
:feature:messaging -.-> :core:navigation
:feature:messaging -.-> :core:prefs
:feature:messaging -.-> :core:resources
:feature:messaging -.-> :core:service
:feature:messaging -.-> :core:ui
:feature:messaging -.-> :core:testing
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