client/web: add initial framework for exit node selector

Updates tailscale/corp#14335

Signed-off-by: Sonia Appasamy <sonia@tailscale.com>

client/web/src/components/app.tsx

@@ -68,7 +68,7 @@ function HomeView({
   data: NodeData
   newSession: () => Promise<void>
   refreshData: () => Promise<void>
-  updateNode: (update: NodeUpdate) => void
+  updateNode: (update: NodeUpdate) => Promise<void> | undefined
 }) {
   return (
     <>
@@ -80,7 +80,7 @@ function HomeView({
         />
       ) : data.DebugMode === "full" && auth?.ok ? (
         // Render new client interface in management mode.
-        <ManagementClientView {...data} />
+        <ManagementClientView node={data} updateNode={updateNode} />
       ) : data.DebugMode === "login" || data.DebugMode === "full" ? (
         // Render new client interface in readonly mode.
         <ReadonlyClientView data={data} auth={auth} newSession={newSession} />

client/web/src/components/exit-node-selector.tsx

@@ -0,0 +1,171 @@
+import cx from "classnames"
+import React, { useCallback, useEffect, useMemo, useState } from "react"
+import { NodeData, NodeUpdate } from "src/hooks/node-data"
+import { ReactComponent as Check } from "src/icons/check.svg"
+import { ReactComponent as ChevronDown } from "src/icons/chevron-down.svg"
+import { ReactComponent as Search } from "src/icons/search.svg"
+
+const noExitNode = "None"
+const runAsExitNode = "Run as exit node…"
+
+export default function ExitNodeSelector({
+  className,
+  node,
+  updateNode,
+}: {
+  className?: string
+  node: NodeData
+  updateNode: (update: NodeUpdate) => Promise<void> | undefined
+}) {
+  const [open, setOpen] = useState<boolean>(false)
+  const [selected, setSelected] = useState(
+    node.AdvertiseExitNode ? runAsExitNode : noExitNode
+  )
+  useEffect(() => {
+    setSelected(node.AdvertiseExitNode ? runAsExitNode : noExitNode)
+  }, [node])
+
+  const handleSelect = useCallback(
+    (item: string) => {
+      setOpen(false)
+      if (item === selected) {
+        return // no update
+      }
+      const old = selected
+      setSelected(item)
+      var update: NodeUpdate = {}
+      switch (item) {
+        case noExitNode:
+          // turn off exit node
+          update = { AdvertiseExitNode: false }
+          break
+        case runAsExitNode:
+          // turn on exit node
+          update = { AdvertiseExitNode: true }
+          break
+      }
+      updateNode(update)?.catch(() => setSelected(old))
+    },
+    [setOpen, selected, setSelected]
+  )
+  // TODO: close on click outside
+  // TODO(sonia): allow choosing to use another exit node
+
+  const [
+    none, // not using exit nodes
+    advertising, // advertising as exit node
+    using, // using another exit node
+  ] = useMemo(
+    () => [
+      selected === noExitNode,
+      selected === runAsExitNode,
+      selected !== noExitNode && selected !== runAsExitNode,
+    ],
+    [selected]
+  )
+
+  return (
+    <>
+      <div
+        className={cx(
+          "p-1.5 rounded-md border flex items-stretch gap-1.5",
+          {
+            "border-gray-200": none,
+            "bg-amber-600 border-amber-600": advertising,
+            "bg-indigo-500 border-indigo-500": using,
+          },
+          className
+        )}
+      >
+        <button
+          className={cx("flex-1 px-2 py-1.5 rounded-[1px] cursor-pointer", {
+            "bg-white hover:bg-stone-100": none,
+            "bg-amber-600 hover:bg-orange-400": advertising,
+            "bg-indigo-500 hover:bg-indigo-400": using,
+          })}
+          onClick={() => setOpen(!open)}
+        >
+          <p
+            className={cx(
+              "text-neutral-500 text-xs text-left font-medium uppercase tracking-wide mb-1",
+              { "bg-opacity-70 text-white": advertising || using }
+            )}
+          >
+            Exit node
+          </p>
+          <div className="flex items-center">
+            <p
+              className={cx("text-neutral-800", {
+                "text-white": advertising || using,
+              })}
+            >
+              {selected === runAsExitNode ? "Running as exit node" : "None"}
+            </p>
+            <ChevronDown
+              className={cx("ml-1", {
+                "stroke-neutral-800": none,
+                "stroke-white": advertising || using,
+              })}
+            />
+          </div>
+        </button>
+        {(advertising || using) && (
+          <button
+            className={cx("px-3 py-2 rounded-sm text-white cursor-pointer", {
+              "bg-orange-400": advertising,
+              "bg-indigo-400": using,
+            })}
+            onClick={(e) => {
+              e.preventDefault()
+              e.stopPropagation()
+              handleSelect(noExitNode)
+            }}
+          >
+            Disable
+          </button>
+        )}
+      </div>
+      {open && (
+        <div className="absolute ml-1.5 -mt-3 w-full max-w-md py-1 bg-white rounded-lg shadow">
+          <div className="w-full px-4 py-2 flex items-center gap-2.5">
+            <Search />
+            <input
+              className="flex-1 leading-snug"
+              placeholder="Search exit nodes…"
+            />
+          </div>
+          <DropdownSection
+            items={[noExitNode, runAsExitNode]}
+            selected={selected}
+            onSelect={handleSelect}
+          />
+        </div>
+      )}
+    </>
+  )
+}
+
+function DropdownSection({
+  items,
+  selected,
+  onSelect,
+}: {
+  items: string[]
+  selected?: string
+  onSelect: (item: string) => void
+}) {
+  return (
+    <div className="w-full mt-1 pt-1 border-t border-gray-200">
+      {items.map((v) => (
+        <button
+          key={v}
+          className="w-full px-4 py-2 flex justify-between items-center cursor-pointer hover:bg-stone-100"
+          onClick={() => onSelect(v)}
+        >
+          <div className="leading-snug">{v}</div>
+          {selected == v && <Check />}
+        </button>
+      ))}
+    </div>
+  )
+}

client/web/src/components/views/management-client-view.tsx

@@ -1,12 +1,18 @@
 import cx from "classnames"
 import React from "react"
-import { NodeData } from "src/hooks/node-data"
+import ExitNodeSelector from "src/components/exit-node-selector"
+import { NodeData, NodeUpdate } from "src/hooks/node-data"
 import { ReactComponent as ArrowRight } from "src/icons/arrow-right.svg"
-import { ReactComponent as ChevronDown } from "src/icons/chevron-down.svg"
 import { ReactComponent as ConnectedDeviceIcon } from "src/icons/connected-device.svg"
 import { Link } from "wouter"
 
-export default function ManagementClientView(props: NodeData) {
+export default function ManagementClientView({
+  node,
+  updateNode,
+}: {
+  node: NodeData
+  updateNode: (update: NodeUpdate) => Promise<void> | undefined
+}) {
   return (
     <div className="mb-12 w-full">
       <h2 className="mb-3">This device</h2>
@@ -15,16 +21,20 @@ export default function ManagementClientView(props: NodeData) {
           <div className="flex items-center">
             <ConnectedDeviceIcon />
             <div className="ml-3">
-              <h1>{props.DeviceName}</h1>
+              <h1>{node.DeviceName}</h1>
               {/* TODO(sonia): display actual status */}
               <p className="text-neutral-500 text-sm">Connected</p>
             </div>
           </div>
           <p className="text-neutral-800 text-lg leading-[25.20px]">
-            {props.IP}
+            {node.IP}
           </p>
         </div>
-        <ExitNodeSelector className="mb-5" />
+        <ExitNodeSelector
+          className="mb-5"
+          node={node}
+          updateNode={updateNode}
+        />
         <Link
           className="text-indigo-500 font-medium leading-snug"
           to="/details"
@@ -54,22 +64,6 @@ export default function ManagementClientView(props: NodeData) {
   )
 }
 
-function ExitNodeSelector({ className }: { className?: string }) {
-  return (
-    <div className={cx("p-1.5 rounded-md border border-gray-200", className)}>
-      <div className="hover-button">
-        <p className="text-neutral-500 text-xs font-medium uppercase tracking-wide mb-1">
-          Exit node
-        </p>
-        <div className="flex items-center">
-          <p className="text-neutral-800">None</p>
-          <ChevronDown className="ml-[9px]" />
-        </div>
-      </div>
-    </div>
-  )
-}
-
 function SettingsCard({
   title,
   link,

client/web/src/hooks/node-data.ts

@@ -75,7 +75,7 @@ export default function useNodeData() {
             : data.AdvertiseExitNode,
       }
 
-      apiFetch("/data", "POST", update, { up: "true" })
+      return apiFetch("/data", "POST", update, { up: "true" })
         .then((r) => r.json())
         .then((r) => {
           setIsPosting(false)
@@ -89,7 +89,10 @@ export default function useNodeData() {
           }
           refreshData()
         })
-        .catch((err) => alert("Failed operation: " + err.message))
+        .catch((err) => {
+          alert("Failed operation: " + err.message)
+          throw err
+        })
     },
     [data]
   )

client/web/src/icons/check.svg

@@ -0,0 +1,3 @@
+<svg width="20" height="20" viewBox="0 0 20 20" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M16.6673 5L7.50065 14.1667L3.33398 10" stroke="#706E6D" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>

client/web/src/icons/chevron-down.svg

@@ -1,3 +1,3 @@
 <svg width="20" height="20" viewBox="0 0 20 20" fill="none" xmlns="http://www.w3.org/2000/svg">
-<path d="M5 7.5L10 12.5L15 7.5" stroke="#706E6D" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/>
+<path d="M5 7.5L10 12.5L15 7.5" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/>
 </svg>

client/web/src/icons/search.svg

@@ -0,0 +1,4 @@
+<svg width="20" height="20" viewBox="0 0 20 20" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M9.16667 15.8333C12.8486 15.8333 15.8333 12.8486 15.8333 9.16667C15.8333 5.48477 12.8486 2.5 9.16667 2.5C5.48477 2.5 2.5 5.48477 2.5 9.16667C2.5 12.8486 5.48477 15.8333 9.16667 15.8333Z" stroke="#706E6D" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
+<path d="M17.5 17.5L13.875 13.875" stroke="#706E6D" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>

client/web/src/index.css

@@ -31,13 +31,6 @@
   .card td:last-child {
     @apply text-neutral-800 text-sm leading-tight;
   }
-  
-  .hover-button {
-    @apply px-2 py-1.5 bg-white rounded-[1px] cursor-pointer;
-  }
-  .hover-button:hover {
-    @apply bg-stone-100;
-  }
 }
 
 /**