1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
use std::sync::atomic::{AtomicBool, Ordering};
use std::sync::{Arc, mpsc};
use std::thread;
use std::time::{Duration, Instant};
use anyhow::Result;
use crossterm::event::{self, Event as CrosstermEvent, KeyEvent, KeyEventKind};
/// Application events.
pub enum AppEvent {
Key(KeyEvent),
Tick,
PingResult {
alias: String,
rtt_ms: Option<u32>,
generation: u64,
},
SyncComplete {
provider: String,
hosts: Vec<crate::providers::ProviderHost>,
},
SyncPartial {
provider: String,
hosts: Vec<crate::providers::ProviderHost>,
failures: usize,
total: usize,
},
SyncError {
provider: String,
message: String,
},
SyncProgress {
provider: String,
message: String,
},
UpdateAvailable {
version: String,
headline: Option<String>,
},
FileBrowserListing {
alias: String,
path: String,
entries: Result<Vec<crate::file_browser::FileEntry>, String>,
},
ScpComplete {
alias: String,
success: bool,
message: String,
},
SnippetHostDone {
run_id: u64,
alias: String,
stdout: String,
stderr: String,
exit_code: Option<i32>,
},
SnippetAllDone {
run_id: u64,
},
SnippetProgress {
run_id: u64,
completed: usize,
total: usize,
},
ContainerListing {
alias: String,
result: Result<crate::containers::ContainerListing, crate::containers::ContainerError>,
},
ContainerActionComplete {
alias: String,
action: crate::containers::ContainerAction,
result: Result<(), String>,
},
/// Result of a `docker inspect` (or `podman inspect`) call fired by
/// the containers overview detail panel. Cached per (alias,
/// container_id) once received so repeat fetches inside the TTL
/// window are skipped.
ContainerInspectComplete {
alias: String,
container_id: String,
// Boxed because `ContainerInspect` carries the full audit
// payload (caps, mounts, compose labels). Inlining it grows the
// `AppEvent` enum past clippy's `large_enum_variant` budget,
// bloating every queue slot for events that do not carry it.
result: Box<Result<crate::containers::ContainerInspect, String>>,
},
/// Result of `<runtime> logs --tail 200` over SSH for a container
/// the user opened with `l`. Populates `Screen::ContainerLogs.body`
/// (or `.error`) when received.
ContainerLogsComplete {
alias: String,
container_id: String,
container_name: String,
result: Result<Vec<String>, String>,
},
/// Result of a short `<runtime> logs --tail N` fetch fired by the
/// containers-overview detail panel to populate the LOGS card.
/// Distinct from `ContainerLogsComplete` so the dedicated logs
/// viewer (`l`) and the detail-panel card stay on separate caches.
ContainerLogsTailComplete {
alias: String,
container_id: String,
result: Box<Result<Vec<String>, String>>,
},
VaultSignResult {
alias: String,
/// Snapshot of the host's `CertificateFile` directive at signing time.
/// Carried in the event so the main loop never has to re-look up the
/// host (which would be O(n) and racy under concurrent renames). Empty
/// when the host has no `CertificateFile` set; `should_write_certificate_file`
/// uses this directly to decide whether to write a default directive.
certificate_file: String,
success: bool,
message: String,
},
VaultSignProgress {
alias: String,
done: usize,
total: usize,
},
VaultSignAllDone {
signed: u32,
failed: u32,
skipped: u32,
cancelled: bool,
aborted_message: Option<String>,
first_error: Option<String>,
},
CertCheckResult {
alias: String,
status: crate::vault_ssh::CertStatus,
},
CertCheckError {
alias: String,
message: String,
},
PollError,
}
/// Polls crossterm events in a background thread.
pub struct EventHandler {
tx: mpsc::Sender<AppEvent>,
rx: mpsc::Receiver<AppEvent>,
paused: Arc<AtomicBool>,
// Keep the thread handle alive
_handle: thread::JoinHandle<()>,
}
impl EventHandler {
pub fn new(tick_rate_ms: u64) -> Self {
let (tx, rx) = mpsc::channel();
let tick_rate = Duration::from_millis(tick_rate_ms);
let event_tx = tx.clone();
let paused = Arc::new(AtomicBool::new(false));
let paused_flag = paused.clone();
let handle = thread::spawn(move || {
let mut last_tick = Instant::now();
loop {
// When paused, sleep instead of polling stdin
if paused_flag.load(Ordering::Acquire) {
thread::sleep(Duration::from_millis(50));
continue;
}
// Cap poll timeout at 50ms so we notice pause flag quickly
let remaining = tick_rate
.checked_sub(last_tick.elapsed())
.unwrap_or(Duration::ZERO);
let timeout = remaining.min(Duration::from_millis(50));
match event::poll(timeout) {
Ok(true) => {
if let Ok(evt) = event::read() {
match evt {
CrosstermEvent::Key(key)
if key.kind == KeyEventKind::Press
&& event_tx.send(AppEvent::Key(key)).is_err() =>
{
return;
}
// Trigger immediate redraw on terminal resize.
CrosstermEvent::Resize(..)
if event_tx.send(AppEvent::Tick).is_err() =>
{
return;
}
_ => {}
}
}
}
Ok(false) => {}
Err(_) => {
// Poll error (e.g. stdin closed). Notify main loop and exit.
let _ = event_tx.send(AppEvent::PollError);
return;
}
}
if last_tick.elapsed() >= tick_rate {
if event_tx.send(AppEvent::Tick).is_err() {
return;
}
last_tick = Instant::now();
}
}
});
Self {
tx,
rx,
paused,
_handle: handle,
}
}
/// Get the next event (blocks until available).
pub fn next(&self) -> Result<AppEvent> {
Ok(self.rx.recv()?)
}
/// Try to get the next event with a timeout.
pub fn next_timeout(&self, timeout: Duration) -> Result<Option<AppEvent>> {
match self.rx.recv_timeout(timeout) {
Ok(event) => Ok(Some(event)),
Err(mpsc::RecvTimeoutError::Timeout) => Ok(None),
Err(mpsc::RecvTimeoutError::Disconnected) => {
Err(anyhow::anyhow!("event channel disconnected"))
}
}
}
/// Get a clone of the sender for sending events from other threads.
pub fn sender(&self) -> mpsc::Sender<AppEvent> {
self.tx.clone()
}
/// Pause event polling (call before spawning SSH).
pub fn pause(&self) {
self.paused.store(true, Ordering::Release);
}
/// Resume event polling (call after SSH exits).
pub fn resume(&self) {
// Drain stale events, but keep background result events
let mut preserved = Vec::new();
while let Ok(event) = self.rx.try_recv() {
match event {
AppEvent::PingResult { .. }
| AppEvent::SyncComplete { .. }
| AppEvent::SyncPartial { .. }
| AppEvent::SyncError { .. }
| AppEvent::SyncProgress { .. }
| AppEvent::UpdateAvailable { .. }
| AppEvent::FileBrowserListing { .. }
| AppEvent::ScpComplete { .. }
| AppEvent::SnippetHostDone { .. }
| AppEvent::SnippetAllDone { .. }
| AppEvent::SnippetProgress { .. }
| AppEvent::ContainerListing { .. }
| AppEvent::ContainerActionComplete { .. }
| AppEvent::ContainerInspectComplete { .. }
| AppEvent::ContainerLogsComplete { .. }
| AppEvent::ContainerLogsTailComplete { .. }
| AppEvent::VaultSignResult { .. }
| AppEvent::VaultSignProgress { .. }
| AppEvent::VaultSignAllDone { .. }
| AppEvent::CertCheckResult { .. }
| AppEvent::CertCheckError { .. } => preserved.push(event),
_ => {}
}
}
// Re-send preserved events
for event in preserved {
let _ = self.tx.send(event);
}
self.paused.store(false, Ordering::Release);
}
}