feat(notification): implement Android and iOS APIs (#340)

plugins/notification/android/src/main/java/NotificationStorage.kt

@@ -0,0 +1,131 @@
+package app.tauri.notification
+
+import android.content.Context
+import android.content.SharedPreferences
+import app.tauri.plugin.JSObject
+import org.json.JSONException
+import java.text.ParseException
+
+// Key for private preferences
+private const val NOTIFICATION_STORE_ID = "NOTIFICATION_STORE"
+// Key used to save action types
+private const val ACTION_TYPES_ID = "ACTION_TYPE_STORE"
+
+class NotificationStorage(private val context: Context) {
+  fun appendNotifications(localNotifications: List<Notification>) {
+    val storage = getStorage(NOTIFICATION_STORE_ID)
+    val editor = storage.edit()
+    for (request in localNotifications) {
+      if (request.isScheduled) {
+        val key: String = request.id.toString()
+        editor.putString(key, request.source.toString())
+      }
+    }
+    editor.apply()
+  }
+
+  fun getSavedNotificationIds(): List<String> {
+    val storage = getStorage(NOTIFICATION_STORE_ID)
+    val all = storage.all
+    return if (all != null) {
+      ArrayList(all.keys)
+    } else ArrayList()
+  }
+
+  fun getSavedNotifications(): List<Notification> {
+    val storage = getStorage(NOTIFICATION_STORE_ID)
+    val all = storage.all
+    if (all != null) {
+      val notifications = ArrayList<Notification>()
+      for (key in all.keys) {
+        val notificationString = all[key] as String?
+        val jsNotification = getNotificationFromJSONString(notificationString)
+        if (jsNotification != null) {
+          try {
+            val notification =
+              Notification.fromJSObject(jsNotification)
+            notifications.add(notification)
+          } catch (_: ParseException) {
+          }
+        }
+      }
+      return notifications
+    }
+    return ArrayList()
+  }
+
+  private fun getNotificationFromJSONString(notificationString: String?): JSObject? {
+    if (notificationString == null) {
+      return null
+    }
+    val jsNotification = try {
+      JSObject(notificationString)
+    } catch (ex: JSONException) {
+      return null
+    }
+    return jsNotification
+  }
+
+  fun getSavedNotificationAsJSObject(key: String?): JSObject? {
+    val storage = getStorage(NOTIFICATION_STORE_ID)
+    val notificationString = try {
+      storage.getString(key, null)
+    } catch (ex: ClassCastException) {
+      return null
+    } ?: return null
+    
+    val jsNotification = try {
+      JSObject(notificationString)
+    } catch (ex: JSONException) {
+      return null
+    }
+    return jsNotification
+  }
+
+  fun getSavedNotification(key: String?): Notification? {
+    val jsNotification = getSavedNotificationAsJSObject(key) ?: return null
+    val notification = try {
+      Notification.fromJSObject(jsNotification)
+    } catch (ex: ParseException) {
+      return null
+    }
+    return notification
+  }
+
+  fun deleteNotification(id: String?) {
+    val editor = getStorage(NOTIFICATION_STORE_ID).edit()
+    editor.remove(id)
+    editor.apply()
+  }
+
+  private fun getStorage(key: String): SharedPreferences {
+    return context.getSharedPreferences(key, Context.MODE_PRIVATE)
+  }
+
+  fun writeActionGroup(typesMap: Map<String, List<NotificationAction>>) {
+    for ((id, notificationActions) in typesMap) {
+      val editor = getStorage(ACTION_TYPES_ID + id).edit()
+      editor.clear()
+      editor.putInt("count", notificationActions.size)
+      for (i in notificationActions.indices) {
+        editor.putString("id$i", notificationActions[i].id)
+        editor.putString("title$i", notificationActions[i].title)
+        editor.putBoolean("input$i", notificationActions[i].input)
+      }
+      editor.apply()
+    }
+  }
+
+  fun getActionGroup(forId: String): Array<NotificationAction?> {
+    val storage = getStorage(ACTION_TYPES_ID + forId)
+    val count = storage.getInt("count", 0)
+    val actions: Array<NotificationAction?> = arrayOfNulls(count)
+    for (i in 0 until count) {
+      val id = storage.getString("id$i", "")
+      val title = storage.getString("title$i", "")
+      val input = storage.getBoolean("input$i", false)
+      actions[i] = NotificationAction(id, title, input)
+    }
+    return actions
+  }
+}