template_0205

RN_TEMPLATE/app/utils/storage/index.ts

@@ -0,0 +1,82 @@
+import { MMKV } from "react-native-mmkv"
+
+export const storage = new MMKV()
+
+/**
+ * Loads a string from storage.
+ *
+ * @param key The key to fetch.
+ */
+export function loadString(key: string): string | null {
+  try {
+    return storage.getString(key) ?? null
+  } catch {
+    // not sure why this would fail... even reading the RN docs I'm unclear
+    return null
+  }
+}
+
+/**
+ * Saves a string to storage.
+ *
+ * @param key The key to fetch.
+ * @param value The value to store.
+ */
+export function saveString(key: string, value: string): boolean {
+  try {
+    storage.set(key, value)
+    return true
+  } catch {
+    return false
+  }
+}
+
+/**
+ * Loads something from storage and runs it thru JSON.parse.
+ *
+ * @param key The key to fetch.
+ */
+export function load<T>(key: string): T | null {
+  let almostThere: string | null = null
+  try {
+    almostThere = loadString(key)
+    return JSON.parse(almostThere ?? "") as T
+  } catch {
+    return (almostThere as T) ?? null
+  }
+}
+
+/**
+ * Saves an object to storage.
+ *
+ * @param key The key to fetch.
+ * @param value The value to store.
+ */
+export function save(key: string, value: unknown): boolean {
+  try {
+    saveString(key, JSON.stringify(value))
+    return true
+  } catch {
+    return false
+  }
+}
+
+/**
+ * Removes something from storage.
+ *
+ * @param key The key to kill.
+ */
+export function remove(key: string): void {
+  try {
+    storage.delete(key)
+  } catch {}
+}
+
+/**
+ * Burn it all to the ground.
+ */
+export function clear(): void {
+  try {
+    storage.clearAll()
+  } catch {}
+}