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zjs81
ea657a964a
- Replaced sqflite with shared_preferences for local key-value storage in README.md - Updated gradle.properties to include builtInKotlin and newDsl flags - Enhanced translation feature documentation in additional-features.md - Modified BLE protocol documentation to include new command and response codes in ble-protocol.md - Clarified channel management details in channels.md - Improved chat and messaging documentation, including message path viewing and translation options in chat-and-messaging.md - Updated contacts management details in contacts.md - Revised map and location documentation for inferred locations and user interface changes in map-and-location.md - Adjusted navigation flow in navigation.md to reflect changes in screen transitions - Updated notification system details in notifications.md - Enhanced repeater management documentation in repeater-management.md - Clarified scanner and connection process in scanner-and-connection.md - Reorganized settings documentation for better clarity and added new node and location settings in settings.md
122 lines
6.7 KiB
Markdown
122 lines
6.7 KiB
Markdown
# Chat & Messaging
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## Overview
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The app supports two chat modes:
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- **Direct messages**: Encrypted point-to-point messages to individual contacts
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- **Channel messages**: Broadcast messages to shared channels (see [Channels](channels.md))
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This page covers direct messaging. For channel chat, see the Channels documentation.
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## How to Access
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From the Contacts screen, tap any Chat-type contact to open the ChatScreen.
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## Chat Screen Layout
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### App Bar
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- **Title**: Contact name
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- **Subtitle**: Current routing path label (e.g., "2 hops", "flood (auto)", "direct (forced)") and unread count. Tapping the subtitle shows the full path details.
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- **Action button**:
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- **Overflow menu** (⋮ icon): Contains Routing, Info, Telemetry, Settings, and Clear Chat. Routing opens the routing sheet where you can switch between Auto, Direct, and Flood routing and manage recent paths (hop count, round-trip time, age, success count, color-coded by repeater). Info shows a dialog with contact type, path, GPS coordinates, and public key.
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### Message List
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- Scrollable list with newest messages at the bottom
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- **Outgoing messages**: Right-aligned, primary color background. **Failed messages** change to a red-toned error container background
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- **Incoming messages**: Left-aligned, grey background with a colored avatar (initial letter or first emoji of sender name; color is deterministic from a hash of the sender name)
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- Bubble width capped at 72% of screen width
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- Hyperlinks rendered as tappable green underlined text
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- **Pinch-to-zoom**: Two-finger zoom (0.8x–1.8x) and double-tap to reset
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- **Jump to bottom**: Floating button appears when scrolled away from the bottom
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- **Lazy loading**: Scrolling to top loads older messages from storage
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### Input Bar
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- **GIF button** (left): Opens GIF picker bottom sheet
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- **Translation button** (optional, between GIF and text field): Shown only when translation is enabled in App Settings. Tap to configure outgoing-message translation language and on/off toggle.
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- **Text field** (center): Auto-capitalization, enforces UTF-8 byte limit in real-time
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- **Send button** (right): Submits the message
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- On desktop: Enter/Numpad Enter also submits
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- When a GIF is selected, the text field shows an inline GIF preview with a dismiss button
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## Message Types
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| Type | Wire Format | Display |
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| Plain text | Raw UTF-8 string | Inline text with link detection |
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| GIF | `g:<giphy-id>` | Inline GIF image from Giphy CDN |
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| Location pin | `m:<lat>,<lon>\|<label>\|...` | Location icon + label; tap to open map |
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| Reaction | `r:<hash>:<emoji-index>` | Applied to target message as emoji pill |
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## Message Status
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Outgoing messages display a status indicator:
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| Status | Icon | Meaning |
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| Pending | Grey double-check | Queued, waiting for device to transmit (visually identical to Sent) |
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| Sent | Grey double-check | Device confirmed transmission (visually identical to Pending) |
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| Delivered | Green double-check | Remote node acknowledged receipt |
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| Failed | Red X | All retries exhausted |
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### Message Tracing Mode
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When enabled in App Settings, additional metadata appears inside each bubble:
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- Timestamp (HH:MM)
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- Retry count (e.g., "Retry 2 of 4") — only shown for outgoing messages where at least one retry has occurred
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- Status icon (outgoing only)
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- Round-trip time in seconds (if delivered)
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## Message Length Limits
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- **Direct messages**: 156 bytes (UTF-8) — enforced in real-time by the input formatter
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- **Channel messages**: 160 minus sender name length minus 2 bytes for the `"<name>: "` prefix
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- Over-length paste shows a snackbar error
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## Send Queue
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Only one message per contact can be in-flight at a time (to avoid overflowing the firmware's 8-entry ACK table). If you send multiple messages rapidly, they are queued and sent sequentially — each waits for the previous one to be delivered, fail, or exhaust retries before transmitting.
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## Retry Mechanism
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When a direct message is sent:
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1. The app computes an expected ACK hash: `SHA256([timestamp][attempt][text][selfPubKey])[0:4]` — matching the firmware's hash calculation. If SMAZ compression is enabled, the compressed text (not the original) is hashed
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2. On device acknowledgment (`RESP_CODE_SENT`), the message transitions to "sent" and a timeout timer starts
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3. **Timeout duration**: Preferably from the ML timeout prediction service; otherwise from the device's own `est_timeout` in `RESP_CODE_SENT` (clamped to the physics range); otherwise calculated from LoRa airtime physics: `500 + (airtime × 6 + 250) × (pathLength + 1)` ms for direct paths, `500 + 16 × airtime` ms for flood (airtime is estimated from the radio's current spreading factor, bandwidth, and coding rate). The result is capped at 45 seconds.
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4. On timeout, the message is retried with **exponential backoff**: `1000 × 2^retryCount` ms (1s, 2s, 4s, 8s, 16s...)
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5. **Max retries**: Configurable (default 5, range 2–10)
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6. After max retries, the message is marked "failed" — but a **30-second grace window** remains during which a late ACK can still resolve the message to "delivered"
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7. If **Clear Path on Max Retry** is enabled (App Settings), the contact's stored routing path is automatically cleared when max retries are exhausted
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8. **Auto route rotation**: When enabled (and no manual path override is set), the retry service uses a diversity window to avoid re-using recently tried paths, cycling through known routes on each attempt
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### Manual Retry
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Long-press a failed message → "Retry" to re-send using the current routing settings.
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## Reactions
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Add emoji reactions to incoming messages (not your own):
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1. Long-press (or right-click on desktop) a message
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2. Select "Add reaction" from the context menu
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3. Choose from quick emojis (thumbs up, heart, laugh, party, clap, fire) or browse the full emoji picker
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4. Reactions appear as pills below the message bubble with emoji and count
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5. Pending reactions show at 50% opacity with a spinner
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6. Failed reactions show a red retry icon (tap to retry)
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## Context Actions (Long-Press / Right-Click)
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| Action | Availability | Description |
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| Add reaction | Incoming messages only | Opens emoji picker |
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| View path | All platforms: long-press/right-click menu | Shows message routing path |
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| Copy | All messages | Copies text to clipboard |
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| Translate | Incoming messages only (when translation is enabled and not yet translated) | Translates the message on-demand using the on-device model |
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| Mark as Unread | Incoming messages only | Marks this message and all subsequent incoming messages as unread |
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| Delete | All messages | Removes locally (not from mesh) |
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| Retry | Failed outgoing messages | Re-sends the message |
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| Open chat with sender | Room server chats | Opens 1:1 chat with the message sender |
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