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// Copyright (c) Tailscale Inc & contributors
// SPDX-License-Identifier: BSD-3-Clause
import { useState, useCallback, useMemo, useEffect, useRef } from "preact/hooks"
import { createPortal } from "preact/compat"
import type { VNode } from "preact"
import { runSSHSession, SSHSessionDef } from "../lib/ssh"
export function SSH({ netMap, ipn }: { netMap: IPNNetMap; ipn: IPN }) {
const [sshSessionDef, setSSHSessionDef] = useState<SSHFormSessionDef | null>(
null
)
const clearSSHSessionDef = useCallback(() => setSSHSessionDef(null), [])
if (sshSessionDef) {
const sshSession = (
<SSHSession def={sshSessionDef} ipn={ipn} onDone={clearSSHSessionDef} />
)
if (sshSessionDef.newWindow) {
return <NewWindow close={clearSSHSessionDef}>{sshSession}</NewWindow>
}
return sshSession
}
const sshPeers = netMap.peers.filter(
(p) => p.tailscaleSSHEnabled && p.online !== false
)
if (sshPeers.length == 0) {
return <NoSSHPeers />
}
return <SSHForm sshPeers={sshPeers} onSubmit={setSSHSessionDef} />
}
type SSHFormSessionDef = SSHSessionDef & { newWindow?: boolean }
function SSHSession({
def,
ipn,
onDone,
}: {
def: SSHSessionDef
ipn: IPN
onDone: () => void
}) {
const ref = useRef<HTMLDivElement>(null)
useEffect(() => {
if (ref.current) {
runSSHSession(ref.current, def, ipn, {
onConnectionProgress: (p) => console.log("Connection progress", p),
onConnected() {},
onError: (err) => console.error(err),
onDone,
})
}
}, [ref])
return <div class="flex-grow bg-black p-2 overflow-hidden" ref={ref} />
}
function NoSSHPeers() {
return (
<div class="container mx-auto px-4 text-center">
None of your machines have{" "}
<a href="https://tailscale.com/kb/1193/tailscale-ssh/" class="link">
Tailscale SSH
</a>
{" "}enabled. Give it a try!
</div>
)
}
function SSHForm({
sshPeers,
onSubmit,
}: {
sshPeers: IPNNetMapPeerNode[]
onSubmit: (def: SSHFormSessionDef) => void
}) {
sshPeers = sshPeers.slice().sort((a, b) => a.name.localeCompare(b.name))
const [username, setUsername] = useState("")
const [hostname, setHostname] = useState(sshPeers[0].name)
return (
<form
class="container mx-auto px-4 flex justify-center"
onSubmit={(e) => {
e.preventDefault()
onSubmit({ username, hostname })
}}
>
<input
type="text"
class="input username"
placeholder="Username"
onChange={(e) => setUsername(e.currentTarget.value)}
/>
<div class="select-with-arrow mx-2">
<select
class="select"
onChange={(e) => setHostname(e.currentTarget.value)}
>
{sshPeers.map((p) => (
<option key={p.nodeKey}>{p.name.split(".")[0]}</option>
))}
</select>
</div>
<input
type="submit"
class="button bg-green-500 border-green-500 text-white hover:bg-green-600 hover:border-green-600"
value="SSH"
onClick={(e) => {
if (e.altKey) {
e.preventDefault()
e.stopPropagation()
onSubmit({ username, hostname, newWindow: true })
}
}}
/>
</form>
)
}
const NewWindow = ({
children,
close,
}: {
children: VNode
close: () => void
}) => {
const newWindow = useMemo(() => {
const newWindow = window.open(undefined, undefined, "width=600,height=400")
if (newWindow) {
const containerNode = newWindow.document.createElement("div")
containerNode.className = "h-screen flex flex-col overflow-hidden"
newWindow.document.body.appendChild(containerNode)
for (const linkNode of document.querySelectorAll(
"head link[rel=stylesheet]"
)) {
const newLink = document.createElement("link")
newLink.rel = "stylesheet"
newLink.href = (linkNode as HTMLLinkElement).href
newWindow.document.head.appendChild(newLink)
}
}
return newWindow
}, [])
if (!newWindow) {
console.error("Could not open window")
return null
}
newWindow.onbeforeunload = () => {
close()
}
useEffect(() => () => newWindow.close(), [])
return createPortal(children, newWindow.document.body.lastChild as Element)
}
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