[AN/STAFF] fix: 카메라 권한 요청(#77) (#80)

* fix: 카메라 권한 요청 구현

* style: 문자열 리소스 name 수정

* refactor: 코틀린 컬렉션 api로 리펙토링

android/festago-staff/app/src/main/AndroidManifest.xml

@@ -2,7 +2,12 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
 
+    <uses-feature
+        android:name="android.hardware.camera"
+        android:required="false" />
+
     <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.CAMERA" />
 
     <application
         android:allowBackup="true"

android/festago-staff/app/src/main/java/com/festago/festagostaff/presentation/extension/ActivityExtension.kt

@@ -0,0 +1,8 @@
+package com.festago.festagostaff.presentation.extension
+
+import android.app.Activity
+import android.widget.Toast
+
+fun Activity.showToast(message: String, duration: Int = Toast.LENGTH_SHORT) {
+    Toast.makeText(this, message, duration).show()
+}

android/festago-staff/app/src/main/java/com/festago/festagostaff/presentation/ui/ticketvalidation/TicketValidationActivity.kt

@@ -1,15 +1,21 @@
 package com.festago.festagostaff.presentation.ui.ticketvalidation
 
+import android.Manifest
 import android.content.Context
 import android.content.Intent
+import android.content.pm.PackageManager.PERMISSION_DENIED
+import android.content.pm.PackageManager.PERMISSION_GRANTED
 import android.os.Bundle
 import android.view.KeyEvent
-import android.widget.Toast
 import androidx.activity.viewModels
 import androidx.appcompat.app.AppCompatActivity
+import androidx.core.app.ActivityCompat
+import androidx.core.content.ContextCompat
+import com.festago.festagostaff.R
 import com.festago.festagostaff.data.RetrofitClient
 import com.festago.festagostaff.data.repository.TicketDefaultRepository
 import com.festago.festagostaff.databinding.ActivityTicketValidationBinding
+import com.festago.festagostaff.presentation.extension.showToast
 import com.google.zxing.BarcodeFormat
 import com.journeyapps.barcodescanner.BarcodeCallback
 import com.journeyapps.barcodescanner.DefaultDecoderFactory
@@ -28,7 +34,7 @@ class TicketValidationActivity : AppCompatActivity() {
 
     private val barcodeCallback = BarcodeCallback { result ->
         if (result.text == null) {
-            Toast.makeText(this, "No content", Toast.LENGTH_SHORT).show()
+            showToast(getString(R.string.ticket_validation_toast_no_content))
             return@BarcodeCallback
         }
         if (!vm.isLatestCode(result.text)) {
@@ -40,6 +46,7 @@ class TicketValidationActivity : AppCompatActivity() {
         super.onCreate(savedInstanceState)
 
         initBinding()
+        checkPermission(Manifest.permission.CAMERA, CAMERA_PERMISSION_CODE)
     }
 
     private fun initBinding() {
@@ -69,7 +76,30 @@ class TicketValidationActivity : AppCompatActivity() {
         return binding.dbvScanner.onKeyDown(keyCode, event) || super.onKeyDown(keyCode, event)
     }
 
+    private fun checkPermission(permission: String, requestCode: Int) {
+        if (ContextCompat.checkSelfPermission(this, permission) == PERMISSION_DENIED) {
+            ActivityCompat.requestPermissions(this, arrayOf(permission), requestCode)
+        }
+    }
+
+    override fun onRequestPermissionsResult(
+        requestCode: Int,
+        permissions: Array<out String>,
+        grantResults: IntArray,
+    ) {
+        super.onRequestPermissionsResult(requestCode, permissions, grantResults)
+        if (requestCode == CAMERA_PERMISSION_CODE) {
+            if (grantResults.getOrNull(0) == PERMISSION_GRANTED) {
+                showToast(getString(R.string.ticket_validation_toast_camera_permission_granted))
+            } else {
+                showToast(getString(R.string.ticket_validation_toast_camera_permission_denied))
+            }
+        }
+    }
+
     companion object {
+        private const val CAMERA_PERMISSION_CODE = 111
+
         fun getIntent(context: Context): Intent {
             return Intent(context, TicketValidationActivity::class.java)
         }

android/festago-staff/app/src/main/res/values/strings.xml

@@ -2,4 +2,9 @@
     <string name="app_name">festago-staff</string>
     <string name="main_btn_check_ticket">티켓 검사</string>
     <string name="main_label_staff">STAFF</string>
+
+    <!-- Strings related to ticket validation -->
+    <string name="ticket_validation_toast_camera_permission_granted">카메라 권한이 허용되었습니다.</string>
+    <string name="ticket_validation_toast_camera_permission_denied">카메라 권한을 거부했습니다.</string>
+    <string name="ticket_validation_toast_no_content">No content</string>
 </resources>