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// Deploy/restart warning banner, ported from mnw.js:578-652. Polls |
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// /api/restart-status; shows a countdown banner when a restart is scheduled. |
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|
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/** Start polling for a scheduled restart and render the countdown banner. */ |
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export function initRestartBanner(): void { |
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let banner: HTMLElement | null = null; |
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let countdownInterval: ReturnType<typeof setInterval> | null = null; |
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let restartAt: number | null = null; |
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|
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function createBanner(): void { |
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if (banner) return; |
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banner = document.createElement('div'); |
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banner.id = 'restart-banner'; |
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banner.className = 'banner banner--warning'; |
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banner.setAttribute('role', 'alert'); |
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document.body.prepend(banner); |
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} |
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|
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function removeBanner(): void { |
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if (banner) { |
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banner.remove(); |
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banner = null; |
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} |
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if (countdownInterval) { |
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clearInterval(countdownInterval); |
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countdownInterval = null; |
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} |
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restartAt = null; |
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} |
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|
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function updateCountdown(): void { |
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if (!banner || restartAt === null) return; |
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const remaining = Math.max(0, Math.round(restartAt - Date.now() / 1000)); |
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if (remaining > 0) { |
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banner.textContent = 'Update deploying — restarting in ' + remaining + 's'; |
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} else { |
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banner.textContent = 'Restarting now...'; |
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if (countdownInterval) { |
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clearInterval(countdownInterval); |
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countdownInterval = null; |
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} |
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} |
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} |
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|
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function startCountdown(ts: number): void { |
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restartAt = ts; |
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createBanner(); |
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updateCountdown(); |
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if (countdownInterval) clearInterval(countdownInterval); |
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countdownInterval = setInterval(updateCountdown, 1000); |
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} |
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|
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function poll(): void { |
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fetch('/api/restart-status') |
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.then((r) => r.json()) |
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.then((data: { restart_at?: number }) => { |
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if (data.restart_at) { |
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if (restartAt === null || restartAt !== data.restart_at) startCountdown(data.restart_at); |
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} else { |
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removeBanner(); |
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} |
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}) |
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.catch(() => { |
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// Already counting down and the poll failed: assume it's happening now. |
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if (restartAt !== null) { |
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if (banner) banner.textContent = 'Restarting now...'; |
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if (countdownInterval) { |
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clearInterval(countdownInterval); |
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countdownInterval = null; |
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} |
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} |
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}); |
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} |
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|
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setTimeout(poll, 2000); |
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setInterval(poll, 10000); |
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} |
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