GopherTrunk TUI

A full-screen operator console over the daemon’s REST + SSE API. The TUI ships in the same binary as the daemon — no separate install — and points at a running daemon over HTTP. Eleven panels cover every read surface; the Scanner cockpit, talkgroup table, and a curated set of mutations are interactive when the daemon is started with api.allow_mutations: true and the TUI with --write.

Quick start

# In one terminal: run the daemon as usual.
gophertrunk run -config config.yaml

# In another: open the TUI.
gophertrunk tui

By default the TUI connects to http://127.0.0.1:8080. Override with -server:

gophertrunk tui -server http://10.0.0.5:8080
gophertrunk tui -server https://radio.example.com -insecure

Flags

Flag	Default	Purpose
-server URL	http://127.0.0.1:8080	daemon base URL
-insecure	false	skip TLS certificate verification (for self-signed test daemons)
-timeout DURATION	5s	per-request timeout; SSE streams are unaffected
-no-color	false	strip ANSI colour, useful when piping or on a monochrome terminal
-write	false	surface mutation keybindings; daemon must also have api.allow_mutations: true

Panels

#	Panel	What it shows
1	Dashboard	At-a-glance health, active call count, recent events, recent tone alerts. Default landing panel.
2	Systems	Configured trunking systems: name, protocol, control channels, IDs (WACN / SystemID / RFSS-Site).
3	Talkgroups	Full talkgroup table from the daemon. Substring filter (/) and a sort cycle (s: ID → Alpha → Priority).
4	Active calls	Calls currently being followed. Driven by a 1 s poll plus live call.start / call.end events for instant updates.
5	Call history	Ended calls from /api/v1/calls/history. On-demand reload (r); the panel does not poll continuously. Row formatting runs off the Update goroutine so the reducer never blocks on history rebuilds.
6	Events	The full SSE feed in chronological order. Substring filter (/), pause auto-scroll (p), clear filter (c). 500-entry ring buffer.
7	Tone alerts	Just tone.alert events with profile / device / matched frequencies. 100-entry ring buffer.
8	Metrics	Curated subset of /metrics: calls active / total, grant total, CC locked, SSE clients, devices attached, tone alerts.
9	Devices	The SDR pool snapshot: serial, driver, tuner, role, configured gain / PPM / bias-tee, attach state. Refreshed on sdr.attached / sdr.detached events for instant updates.
0	Scanner	Police-scanner cockpit: per-trunked-system CC hunter state, conventional FM scan list (current dwell highlighted), talkgroup scan-list summary, audio cockpit.
—	Settings	Tabbed read-only inspector of the live daemon configuration (Daemon · Storage · Audio · Recording · Tones · API · Vocoders · SDR · FEC). Reach via Tab / Shift+Tab or the command palette — there’s no number shortcut.

Keybindings

Global

Key	Action
Tab	next panel
Shift+Tab	previous panel
1–9, 0	jump directly to a panel (0 = Scanner; Settings has no number)
Ctrl+P	open the fuzzy command palette (see below)
Ctrl+T	toggle theme (dark ↔ monochrome)
?	toggle help overlay
q / Ctrl+C	quit

Inside tables

Key	Action
j / ↓	next row
k / ↑	previous row
g	top
G	bottom
Page Down / Page Up	scroll a page

Panel-local

Panel	Keys
Systems	Enter open detail card
Talkgroups	/ filter, s cycle sort, l toggle lockout, S toggle scan flag, + / - priority up/down, Enter open detail card, Esc exit filter input
Active calls	e end highlighted call (write)
Call history	r reload
Events	/ filter, p pause auto-scroll, c clear filter
Tone alerts	R reset detector for highlighted device (write)
Metrics	S run retention sweep now (write)
Devices	(table navigation only)
Scanner	j / k move row, h hold/resume highlighted row, r force re-hunt (Systems section, confirms), Enter dwell on highlighted conv channel, L lockout / unlockout highlighted conv channel (skipped from scan rotation, runtime-only), m cycle scan_mode, + / - volume up/down (5% step), M mute toggle, R recording toggle, f manual tune (type frequency in MHz, Enter to listen, Esc to cancel)
Settings	[ / ] / h / l / ← / → cycle through inspector tabs

Mouse

The tab strip is clickable, and every table-backed panel (Systems · Talkgroups · Active · History · Devices · Tones · Metrics) reacts to body clicks and scroll-wheel ticks:

• Left-click on a tab switches to that panel.
• Left-click on a data row moves the cursor onto that row. Follow up with Enter to open the detail card, or with a mutation key (e to end the highlighted call, R to reset the highlighted tone detector, L to toggle conventional channel lockout, etc.).
• Scroll-wheel up/down advances the cursor one row at a time in the same panels. Bubbles v1.0.0’s table.Update is KeyMsg-only, so wheel forwarding is plumbed by the TUI itself via a shared MouseAware interface.

Chrome clicks (border / title / column header) are ignored; out-of-range clicks clamp to the last row.

Command palette

Ctrl+P opens a centered fuzzy-matched action list. Type to filter; ↑ / ↓ or Ctrl+J / Ctrl+K to move; Enter to run; Esc or another Ctrl+P to dismiss. The list is rebuilt every time you open the palette so newly-arrived systems / talkgroups / devices are reachable without a restart.

Discovered actions:

• Panel jumps for every panel (including Settings, which has no number shortcut).
• System / talkgroup / device drill-ins — pre-positions the destination panel’s cursor on the matching row before opening the detail modal, so keyboard and mouse paths converge on the same selection. Talkgroup actions cap at the first 200 to keep the list legible on large rosters.
• Audio mutations — volume ±5%, mute toggle, recording toggle.
• Retention sweep (confirms).
• Scanner — toggle scan_mode list ↔ all, per-system hold/resume.
• Theme toggle, help overlay, quit.

Theme

Ctrl+T cycles between the dark and monochrome palettes at runtime. -no-color starts the TUI on monochrome and pins the lipgloss renderer to a nil writer so ANSI is stripped even when piping output — Ctrl+T flips the palette in that mode but the renderer won’t re-emit colour.

Panels that own a cached bubbles/table style bundle handle a ThemeChangedMsg broadcast by re-applying tableStyles() so the swap takes effect on the next render without a restart.

Settings panel

Read-only inspector of the live daemon configuration, fetched once at startup and refreshed every 30 s from GET /api/v1/runtime. Cycle through tabs with [ / ] (or h / l / ← / →):

Tab	Coverage
Daemon	version, log level / format, metrics enabled
Storage	call-log DB path, CC cache file, retention windows (days) + sweeper interval
Audio	enabled, device, sample rate, buffer ms, available backends, auto-fallback disable flag (Linux)
Recording	output dir, sample rate, raw vocoder frames, CMA equalizer (taps + step size)
Tones	per-profile name, cooldown, frequencies
API	HTTP / gRPC / WebSocket / metrics listener addresses, mutations allowed
Vocoders	per-protocol vocoder mapping
SDR	registered backend names, per-device serial / role / gain
FEC	per-system FEC state — every protocol’s chain is on by default, this view surfaces explicit <key>: off opt-outs and the current channel-coding / colour-code parameters

Every config knob the daemon reads has a touch-point here. Mutating the settings still requires editing config.yaml and restarting the daemon.

Polling cadences

The TUI keeps SharedState fresh with a fan of polling Cmds:

Endpoint	Period
/api/v1/calls/active	1 s
/api/v1/health	2 s
/api/v1/scanner	2 s
/api/v1/audio	3 s
/metrics	5 s
/api/v1/systems	10 s
/api/v1/devices	10 s (also refreshed on sdr.attached / sdr.detached)
/api/v1/talkgroups	30 s
/api/v1/runtime	30 s
/api/v1/calls/history	on-demand (r in History panel)
/api/v1/systems/{name}	on-demand (Systems panel Enter)
/api/v1/talkgroups/{id}	on-demand (Talkgroups panel Enter)

A long-lived /api/v1/events SSE stream complements the polls, so call.start / call.end / cc.locked / tone.alert / audio.state arrive instantly. If the SSE stream drops, the TUI shows a transient toast and reconnects with exponential backoff (1 s → 30 s cap).

Mutations

The TUI drives a curated set of operator actions when both sides opt in:

# Daemon side: enable in config.yaml.
api:
  http_addr: 127.0.0.1:8080   # bind to loopback if you can
  allow_mutations: true

# TUI side: pass --write to surface the keybindings.
gophertrunk tui --write

Both ends are gated separately on purpose. The daemon’s HTTP API has no authentication today, so any host that can reach the listener can call mutations once the gate is open — bind to 127.0.0.1 and trust the operator before flipping it on.

Panel	Key	Action	Confirm?
Active calls	e	End the highlighted call (POST /api/v1/calls/{serial}/end, reason=manual)	yes
Talkgroups	l	Toggle lockout on the highlighted talkgroup (PATCH /api/v1/talkgroups/{id})	no — reversible
Talkgroups	S	Toggle scan flag (relevant when scan_mode: list)	no
Talkgroups	+ / -	Bump priority up / down (clamped 0–99)	no
Tone alerts	R	Reset tone-out match progress on the highlighted device (POST /api/v1/devices/{serial}/tone-reset)	yes
Metrics	S	Run a retention sweep now (POST /api/v1/retention/sweep)	yes
Scanner	h	Hold/resume highlighted system or conv channel (POST /api/v1/scanner/hunt/{system}/{hold,resume} or /conventional/{hold,resume})	no
Scanner	r	Force re-hunt the highlighted system (POST /api/v1/scanner/hunt/{system}/retune)	yes
Scanner	Enter	Dwell on the highlighted conv channel (POST /api/v1/scanner/conventional/{index}/dwell)	no
Scanner	L	Lockout / unlockout the highlighted conv channel (POST /api/v1/scanner/conventional/{index}/{lockout,unlockout})	no — reversible
Scanner	m	Cycle global scan_mode list ↔ all (PATCH /api/v1/scanner)	no
Scanner	f	Manual tune: type a frequency in MHz and Enter to listen (POST /api/v1/scanner/manual_tune)	no
Scanner	+ / - / M / R	Volume ± 5%, mute toggle, recording toggle (PATCH /api/v1/audio)	no

When a key requires confirmation, a centered modal opens. The modal captures keyboard focus until you press:

• y or Enter — fire the action and close the modal
• n or Esc — cancel and close the modal

On success the status bar shows <label> ok and the dependent read panels refresh immediately rather than waiting for the next poll tick. Audio mutations additionally publish an audio.state SSE event so a second TUI / curl PATCH converges in one round-trip instead of waiting for the next 3 s poll. On failure the status bar shows the HTTP error.

The TUI fetches GET /api/v1/mutations once at startup to learn which subsystems the daemon has wired (engine / retention / tone detector / scanner / audio). If the daemon doesn’t recognise the route (older build), the TUI assumes mutations are off and --write is a no-op.

Endpoints reference

Method	Path	Body	Notes
GET	/api/v1/mutations	—	Capability probe. Always 200.
GET	/api/v1/runtime	—	Sanitized snapshot of config.Config. Powers the Settings panel.
GET	/api/v1/audio	—	Current backend / volume / mute / recording state.
PATCH	/api/v1/audio	{"volume":0.7} / {"muted":true} / {"recording_enabled":true}	Any combination of the three knobs.
GET	/api/v1/scanner	—	Unified scanner snapshot — systems, conventional, scan_mode, scan-list counts.
PATCH	/api/v1/scanner	{"scan_mode":"list"}	Cycle scan_mode at runtime.
POST	/api/v1/scanner/hunt/{system}/{hold,resume,retune}	—	Per-system CC-hunt control.
POST	/api/v1/scanner/conventional/{hold,resume}	—	Conventional scanner control.
POST	/api/v1/scanner/conventional/{index}/{dwell,lockout,unlockout}	—	Per-channel control.
POST	/api/v1/scanner/manual_tune	{"frequency_hz":155895000,"label":"...","mode":"fm"}	Adds a runtime VFO channel and dwells.
POST	/api/v1/calls/{deviceSerial}/end	{"reason":"manual"}	404 if no active call on that device.
PATCH	/api/v1/talkgroups/{id}	{"priority":3,"lockout":true,"scan":false}	All fields optional; supply at least one. Returns the updated TalkgroupDTO.
POST	/api/v1/retention/sweep	—	Synchronous; 503 if no call-log persistence configured.
POST	/api/v1/devices/{serial}/tone-reset	—	503 if the tone-out detector isn’t wired.

Every mutation endpoint returns 403 Forbidden with {"error":"mutations disabled (set api.allow_mutations: true to enable)"} when the daemon was started without the gate.

Troubleshooting

• “daemon unreachable”: check the daemon is running and the -server URL is reachable. If the daemon binds to a non-default address or port, pass -server explicitly.
• “event stream disconnected”: the TUI auto-reconnects. If the toast keeps reappearing, check the daemon logs and the connection in front of it (corporate proxies sometimes truncate SSE).
• Garbled colours: pass -no-color, or set TERM to a value your terminal supports (e.g. xterm-256color). Ctrl+T also cycles to the monochrome palette at runtime.

Implementation notes

• Library: charmbracelet/bubbletea (Elm-style model/update/view) + bubbles (table, textinput, viewport, help) + lipgloss (styling).
• DTOs are mirrored from internal/api/types.go into internal/tui/client/types.go rather than imported, keeping the TUI a pure HTTP client of the wire protocol.
• The SSE pump uses bubbletea’s canonical channel pattern: a goroutine reads the stream, writes typed Events into a buffered channel, and a listenSSE Cmd blocks on <-ch and re-arms itself in the model’s Update.
• All colour decisions flow through internal/tui/theme. Panels read theme.Theme() at render time; the cached lipgloss styles on *Model and inside each bubbles/table re-pick up the palette via panels.ThemeChangedMsg.
• Optional panel interfaces:
  • panels.Revealer — pre-position a panel’s cursor on a key (system name, talkgroup ID, device serial, scanner row). Driven from the command palette.
  • panels.MouseAware — left-press + scroll-wheel handling on body rows. Driven from the root model’s mouse hit-test.
  • Both are opt-in; panels that don’t implement them are skipped silently by the dispatcher.