Added extension functionality

lib/extensions/hooks.ts

@@ -0,0 +1,72 @@
+'use client'
+
+import { useState, useEffect, useCallback } from 'react'
+import type { ExtensionToggle } from './types'
+
+export function useEnabledExtensions() {
+  const [extensions, setExtensions] = useState<ExtensionToggle[]>([])
+  const [isLoading, setIsLoading] = useState(true)
+
+  const refresh = useCallback(async () => {
+    setIsLoading(true)
+    try {
+      const res = await fetch('/api/extensions/toggles')
+      if (res.ok) {
+        const { data } = await res.json()
+        setExtensions(data ?? [])
+      }
+    } finally {
+      setIsLoading(false)
+    }
+  }, [])
+
+  useEffect(() => {
+    refresh()
+  }, [refresh])
+
+  return { extensions, isLoading, refresh }
+}
+
+export function useExtensionToggle(sectorSlug: string, extensionSlug: string) {
+  const [enabled, setEnabled] = useState(false)
+  const [isLoading, setIsLoading] = useState(true)
+
+  useEffect(() => {
+    const check = async () => {
+      setIsLoading(true)
+      try {
+        const res = await fetch(`/api/extensions/toggles/${sectorSlug}/${extensionSlug}`)
+        if (res.ok) {
+          const { data } = await res.json()
+          setEnabled(data?.enabled ?? false)
+        }
+      } finally {
+        setIsLoading(false)
+      }
+    }
+    check()
+  }, [sectorSlug, extensionSlug])
+
+  const toggle = useCallback(async () => {
+    const newValue = !enabled
+    setEnabled(newValue) // Optimistic update
+    try {
+      const res = await fetch('/api/extensions/toggles', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({
+          sector_slug: sectorSlug,
+          extension_slug: extensionSlug,
+          enabled: newValue,
+        }),
+      })
+      if (!res.ok) {
+        setEnabled(!newValue) // Revert on error
+      }
+    } catch {
+      setEnabled(!newValue) // Revert on error
+    }
+  }, [enabled, sectorSlug, extensionSlug])
+
+  return { enabled, isLoading, toggle }
+}