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https://github.com/zjs81/meshcore-open.git
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zjs81
c229b0369e
- Updated supported languages to include Hungarian, Japanese, and Korean. - Added new on-device message translation feature with detailed usage instructions. - Introduced emoji reactions in chat with user interface and functionality details. - Implemented linkification for automatic detection of URLs and meshcore URIs in messages. - Added GPX export functionality for contacts with GPS coordinates. - Enabled pinch-to-zoom for chat text scaling. - Documented background service for Android to maintain BLE connection in the background. - Revised BLE protocol documentation to reflect changes in connection state machine and command codes. - Updated channels documentation to clarify message display and interaction options. - Enhanced chat and messaging documentation with new translation button and message metadata. - Clarified contact actions in contacts documentation. - Adjusted map and location documentation for improved node name visibility and filter options. - Revised navigation documentation to streamline disconnection process. - Improved notification documentation to specify batch notification behavior. - Updated repeater management documentation to reflect new features and settings. - Enhanced scanner and connection documentation for device filtering and connection timeout. - Expanded settings documentation to include new translation options. - Removed jni plugin references from generated plugin files for Linux and Windows.
123 lines
6.7 KiB
Markdown
123 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 buttons**:
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- **Routing mode** (waves icon): Switch between Auto, Direct, and Flood routing
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- **Path management** (timeline icon): View recent paths with hop count, round-trip time, age, and success count. Paths are color-coded by direct repeater (green/yellow/red/blue for ranked repeaters, grey for unknown). Tap a path to activate it (the device verifies and confirms via snackbar), long-press to view full path details, set custom paths, or force flood mode. A warning banner appears when history reaches 100 entries.
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- **Info** (info icon): Contact info dialog showing type, path, GPS coordinates, public key, and SMAZ compression toggle
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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 65% 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 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)
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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 | Mobile: tap bubble directly; Desktop: long-press/right-click menu | Shows message routing path |
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| Copy | All messages | Copies text to clipboard |
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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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