From 483356a1813a4648ece35d59a159a68796790974 Mon Sep 17 00:00:00 2001
From: Pavel Prichodko <14926950+prichodko@users.noreply.github.com>
Date: Wed, 6 Apr 2022 14:00:28 +0200
Subject: [PATCH] feat(react): add local storage hook

---
 .../src/hooks/use-local-storage.tsx           | 96 +++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 packages/status-react/src/hooks/use-local-storage.tsx

diff --git a/packages/status-react/src/hooks/use-local-storage.tsx b/packages/status-react/src/hooks/use-local-storage.tsx
new file mode 100644
index 0000000..d3f96bb
--- /dev/null
+++ b/packages/status-react/src/hooks/use-local-storage.tsx
@@ -0,0 +1,96 @@
+import { useCallback, useEffect, useState } from 'react'
+
+// See: https://usehooks-ts.com/react-hook/use-event-listener
+// import { useEventListener } from '../useEventListener'
+import type { Dispatch, SetStateAction } from 'react'
+
+declare global {
+  interface WindowEventMap {
+    'local-storage': CustomEvent
+  }
+}
+
+type SetValue<T> = Dispatch<SetStateAction<T>>
+
+export function useLocalStorage<T>(
+  key: string,
+  initialValue: T
+): [T, SetValue<T>] {
+  // Get from local storage then
+  // parse stored json or return initialValue
+  const readValue = useCallback((): T => {
+    // Prevent build error "window is undefined" but keep keep working
+    if (typeof window === 'undefined') {
+      return initialValue
+    }
+
+    try {
+      const item = window.localStorage.getItem(key)
+      return item ? (parseJSON(item) as T) : initialValue
+    } catch (error) {
+      console.warn(`Error reading localStorage key “${key}”:`, error)
+      return initialValue
+    }
+  }, [initialValue, key])
+
+  // State to store our value
+  // Pass initial state function to useState so logic is only executed once
+  const [storedValue, setStoredValue] = useState<T>(readValue)
+
+  // Return a wrapped version of useState's setter function that ...
+  // ... persists the new value to localStorage.
+  const setValue: SetValue<T> = useCallback(
+    value => {
+      // Prevent build error "window is undefined" but keeps working
+      if (typeof window == 'undefined') {
+        console.warn(
+          `Tried setting localStorage key “${key}” even though environment is not a client`
+        )
+      }
+
+      try {
+        // Allow value to be a function so we have the same API as useState
+        const newValue = value instanceof Function ? value(storedValue) : value
+
+        // Save to local storage
+        window.localStorage.setItem(key, JSON.stringify(newValue))
+
+        // Save state
+        setStoredValue(newValue)
+
+        // We dispatch a custom event so every useLocalStorage hook are notified
+        window.dispatchEvent(new Event('local-storage'))
+      } catch (error) {
+        console.warn(`Error setting localStorage key “${key}”:`, error)
+      }
+    },
+    [key, storedValue]
+  )
+
+  useEffect(() => {
+    setStoredValue(readValue())
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [])
+
+  // const handleStorageChange = useCallback(() => {
+  //   setStoredValue(readValue())
+  // }, [readValue])
+
+  // this only works for other documents, not the current one
+  // useEventListener('storage', handleStorageChange)
+
+  // this is a custom event, triggered in writeValueToLocalStorage
+  // See: useLocalStorage()
+  // useEventListener('local-storage', handleStorageChange)
+
+  return [storedValue, setValue]
+}
+
+function parseJSON<T>(value: string | null): T | undefined {
+  try {
+    return value === 'undefined' ? undefined : JSON.parse(value ?? '')
+  } catch {
+    console.log('Parse error', { value })
+    return undefined
+  }
+}