Resolve "Notification on alarm set"

Closes #9 (closed)

NoteApplication/app/src/main/java/com/noteapplication/cs398/AddNoteActivity.kt

 package com.noteapplication.cs398
 
 import android.Manifest
-import android.app.AlertDialog
-import android.app.DatePickerDialog
-import android.app.TimePickerDialog
+import android.annotation.TargetApi
+import android.app.*
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.ContextWrapper
 import android.content.Intent
 import android.content.pm.PackageManager
 import android.graphics.Bitmap
 import android.graphics.BitmapFactory
 import android.graphics.Rect
 import android.net.Uri
+import android.os.Build
 import android.os.Bundle
 import android.provider.MediaStore
 import android.view.View
 import android.widget.DatePicker
-import android.widget.TextView
 import android.widget.TimePicker
 import android.widget.Toast
 import androidx.activity.result.contract.ActivityResultContracts
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.app.ActivityCompat
+import androidx.core.app.NotificationCompat
 import androidx.core.content.ContextCompat
 import androidx.core.view.isGone
-import androidx.fragment.app.DialogFragment
 import androidx.lifecycle.ViewModelProvider
 import androidx.recyclerview.widget.RecyclerView
 import com.noteapplication.cs398.database.Folder
 import com.noteapplication.cs398.database.Note
 import com.noteapplication.cs398.database.Tag
 import com.noteapplication.cs398.databinding.ActivityAddNoteBinding
-import java.util.*
 import java.io.InputStream
 import java.time.LocalDateTime
 import java.time.format.DateTimeFormatter
+import java.util.*
 
-//class MainActivity : AppCompatActivity(), TimePickerDialog.OnTimeSetListener {
-//    override fun onCreate(savedInstanceState: Bundle?) {
-//        super.onCreate(savedInstanceState)
-//        setContentView(R.layout.activity_main)
-//        val button: Button = findViewById<View>(R.id.button) as Button
-//        button.setOnClickListener(View.OnClickListener {
-//            val timePicker: DialogFragment = TimePickerFragment()
-//            timePicker.show(supportFragmentManager, "time picker")
-//        })
-//    }
-//
-//    override fun onTimeSet(view: TimePicker?, hourOfDay: Int, minute: Int) {
-//        val textView: TextView = findViewById<View>(R.id.textView) as TextView
-//        textView.setText("Hour: $hourOfDay Minute: $minute")
-//    }
-//}
 class AddNoteActivity : AppCompatActivity(), DatePickerDialog.OnDateSetListener, TimePickerDialog.OnTimeSetListener {
     private lateinit var binding: ActivityAddNoteBinding
     private lateinit var noteViewModel: NoteViewModel
     private lateinit var tagViewModel: TagViewModel
 
-    private var title: String = ""
-    private var content: String = ""
+    var title: String = ""
+    var content: String = ""
     private var todo: Boolean = false
 
     private var oldNote: Note? = null
@@ -121,6 +107,10 @@ class AddNoteActivity : AppCompatActivity(), DatePickerDialog.OnDateSetListener,
 
             val newNote: Note
             calendar.set(recorded_year, recorded_month, recorded_day, recorded_hour, recorded_minute)
+            title = binding.titleInput.text.toString()
+            content = binding.contentInput.text.toString()
+            println("title: $title")
+            println("content: $content")
             if (oldNote != null) {
                 newNote = oldNote!!.copy(
                     title = binding.titleInput.text.toString(),
@@ -129,6 +119,13 @@ class AddNoteActivity : AppCompatActivity(), DatePickerDialog.OnDateSetListener,
                     notifyAt = calendar.time.time,
                     updatedAt = Date().time
                 )
+                if (((calendar.time != Date(oldNote!!.notifyAt)) && binding.idRmdSwitch.isChecked)||
+                    (oldNote!!.title != title) || (oldNote!!.content != content)) {
+                    cancelAlarm()
+                    startAlarm(calendar)
+                } else if (oldNote!!.notify && !binding.idRmdSwitch.isChecked){
+                    cancelAlarm()
+                }
                 noteViewModel.updateNote(newNote, tagViewModel.getSelectedTags())
             } else {
                 newNote = Note(
@@ -136,8 +133,12 @@ class AddNoteActivity : AppCompatActivity(), DatePickerDialog.OnDateSetListener,
                     binding.contentInput.text.toString(),
                     binding.idRmdSwitch.isChecked,
                     notifyAt = calendar.time.time,
+                    createdAt = calendar.time.time,
                     folderId = folder?.id // the note does not goes to any folder for now
                 )
+                if (binding.idRmdSwitch.isChecked) {
+                    startAlarm(calendar)
+                }
                 noteViewModel.insertNote(newNote, tagViewModel.getSelectedTags())
             }
 
@@ -173,6 +174,7 @@ class AddNoteActivity : AppCompatActivity(), DatePickerDialog.OnDateSetListener,
             recorded_hour = calendar.get(Calendar.HOUR_OF_DAY)
             recorded_minute = calendar.get(Calendar.MINUTE)
         }
+        calendar.set(Calendar.SECOND, 0)
         // time setter
         val current = LocalDateTime.now()
         var formatted = current.format(DateTimeFormatter.BASIC_ISO_DATE)
@@ -183,10 +185,12 @@ class AddNoteActivity : AppCompatActivity(), DatePickerDialog.OnDateSetListener,
             "" + (if (recorded_hour % 12 < 10) "0" else "") + recorded_hour % 12 + ":" + (if (recorded_minute < 10) "0" else "") + recorded_minute + " " + if (recorded_hour / 12 > 0) "PM" else "AM"
         binding.timeInput.text = time
         println("year: $recorded_year, month: $recorded_month, day: $recorded_day, hour:$recorded_hour, minute:$recorded_minute")
+
         binding.dateInput.setOnClickListener() {
             println("year: $recorded_year, month: $recorded_month, day: $recorded_day, hour:$recorded_hour, minute:$recorded_minute")
             DatePickerDialog(this, AlertDialog.THEME_HOLO_LIGHT, this, recorded_year, recorded_month, recorded_day).show()
         }
+
         binding.timeInput.setOnClickListener {
             println("year: $recorded_year, month: $recorded_month, day: $recorded_day, hour:$recorded_hour, minute:$recorded_minute")
             TimePickerDialog(this, AlertDialog.THEME_HOLO_LIGHT, this, recorded_hour, recorded_minute, false).show()
@@ -216,7 +220,7 @@ class AddNoteActivity : AppCompatActivity(), DatePickerDialog.OnDateSetListener,
         super.onRequestPermissionsResult(requestCode, permissions, grantResults)
         if (requestCode == REQUEST_CODE_STORAGE_PERMISSION && grantResults.isNotEmpty()) {
             if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
-                selectImage();
+                selectImage()
             } else {
                 Toast.makeText(this, "Permission Denied", Toast.LENGTH_SHORT).show()
             }
@@ -258,4 +262,34 @@ class AddNoteActivity : AppCompatActivity(), DatePickerDialog.OnDateSetListener,
             Toast.makeText(this, exception.message, Toast.LENGTH_SHORT).show()
         }
     }
-}
\ No newline at end of file
+
+    private fun startAlarm(c: Calendar) {
+        var id:Int = calendar.time.time.toInt()
+        if (oldNote != null) {
+            id = oldNote!!.createdAt.toInt()
+        }
+        val alarmManager: AlarmManager = getSystemService(Context.ALARM_SERVICE) as AlarmManager
+        val intent = Intent(this, AlertReceiver::class.java)
+        intent.putExtra("title", title)
+        intent.putExtra("content", content)
+        intent.putExtra("id", id)
+        Toast.makeText(this, "title: $title, content:$content", Toast.LENGTH_SHORT).show()
+        val pendingIntent =
+            PendingIntent.getBroadcast(this, id, intent, PendingIntent.FLAG_UPDATE_CURRENT)
+
+        if (c.before(Calendar.getInstance())) {
+            return
+        }
+        alarmManager.setExact(AlarmManager.RTC_WAKEUP, c.timeInMillis, pendingIntent)
+    }
+
+    private fun cancelAlarm() {
+        val alarmManager: AlarmManager = getSystemService(Context.ALARM_SERVICE) as AlarmManager
+        Toast.makeText(this, "delted: $title", Toast.LENGTH_SHORT).show()
+        val intent = Intent(this, AlertReceiver::class.java)
+        val pendingIntent: PendingIntent = PendingIntent.getBroadcast(this, oldNote!!.createdAt.toInt(), intent, PendingIntent.FLAG_MUTABLE)
+        alarmManager.cancel(pendingIntent)
+//        mTextView.setText("Alarm canceled")
+    }
+}
+