Feat: Implement Feature Flagging

app/src/main/kotlin/com/jeeldobariya/passcodes/flags/FeatureFlagManager.kt

@@ -0,0 +1,27 @@
+package com.jeeldobariya.passcodes.flags
+
+import android.content.Context
+import androidx.core.content.edit
+
+class FeatureFlagManager private constructor(context: Context) {
+    private val prefs = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
+
+    var latestFeaturesEnabled: Boolean
+        get() = prefs.getBoolean(KEY_LATEST_FEATURES, false)
+        set(value) { prefs.edit { putBoolean(KEY_LATEST_FEATURES, value) } }
+
+    companion object {
+        private const val PREFS_NAME = "feature_flags"
+        private const val KEY_LATEST_FEATURES = "latest_features_enabled"
+
+        @Volatile private var INSTANCE: FeatureFlagManager? = null
+
+        fun get(context: Context): FeatureFlagManager {
+            return INSTANCE ?: synchronized(this) {
+                val instance = FeatureFlagManager(context.applicationContext)
+                INSTANCE = instance
+                instance
+            }
+        }
+    }
+}

app/src/main/kotlin/com/jeeldobariya/passcodes/ui/SettingsActivity.kt

@@ -13,6 +13,8 @@ import android.view.LayoutInflater
 
 import com.jeeldobariya.passcodes.R
 import com.jeeldobariya.passcodes.databinding.ActivitySettingsBinding
+import com.jeeldobariya.passcodes.flags.FeatureFlagManager
+import androidx.core.content.edit
 
 class SettingsActivity : AppCompatActivity() {
 
@@ -44,6 +46,8 @@ class SettingsActivity : AppCompatActivity() {
 
         setInitialLangSelection()
 
+        binding.switchLatestFeatures.isChecked = FeatureFlagManager.get(this).latestFeaturesEnabled
+
         // Add event onclick listener
         addOnClickListenerOnButton()
 
@@ -90,10 +94,15 @@ class SettingsActivity : AppCompatActivity() {
             val newThemeStyle = THEMES[nextIndex]
 
             // Save the new theme and restart the application to apply it
-            sharedPrefs.edit().putInt(THEME_KEY, newThemeStyle).apply()
+            sharedPrefs.edit { putInt(THEME_KEY, newThemeStyle) }
             recreate()
 
             Toast.makeText(this@SettingsActivity, getString(R.string.restart_app_require), Toast.LENGTH_SHORT).show()
         }
+
+        binding.switchLatestFeatures.setOnCheckedChangeListener { _, isChecked ->
+            FeatureFlagManager.get(this).latestFeaturesEnabled = isChecked
+            Toast.makeText(this@SettingsActivity, getString(R.string.future_feat_clause) + isChecked.toString(), Toast.LENGTH_SHORT).show()
+        }
     }
 }

app/src/main/kotlin/com/jeeldobariya/passcodes/ui/ViewPasswordActivity.kt

@@ -13,8 +13,10 @@ import androidx.lifecycle.lifecycleScope
 import com.jeeldobariya.passcodes.R
 import com.jeeldobariya.passcodes.database.Password
 import com.jeeldobariya.passcodes.databinding.ActivityViewPasswordBinding
+import com.jeeldobariya.passcodes.flags.FeatureFlagManager
 import com.jeeldobariya.passcodes.utils.Controller
 import com.jeeldobariya.passcodes.utils.DatabaseOperationException
+import com.jeeldobariya.passcodes.utils.DateTimeUtils
 import com.jeeldobariya.passcodes.utils.PasswordNotFoundException
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
@@ -50,6 +52,8 @@ class ViewPasswordActivity : AppCompatActivity() {
 
         controller = Controller(this)
 
+        binding.copyPasswordBtn.isEnabled = FeatureFlagManager.get(this).latestFeaturesEnabled
+
         // Add event onclick listener
         addOnClickListenerOnButton()
 
@@ -62,11 +66,13 @@ class ViewPasswordActivity : AppCompatActivity() {
             try {
                 passwordEntity = controller.getPasswordById(passwordEntityId)
                 withContext(Dispatchers.Main) {
+                    val lastUpdatedAt = DateTimeUtils.getRelativeDays(passwordEntity.updatedAt.orEmpty(), "yyyy-MM-dd HH:mm:ss")
+
                     binding.tvDomain.text = "${getString(R.string.domain_prefix)}  ${passwordEntity.domain}"
                     binding.tvUsername.text = "${getString(R.string.username_prefix)}  ${passwordEntity.username}"
                     binding.tvPassword.text = "${getString(R.string.password_prefix)}  ${passwordEntity.password}"
                     binding.tvNotes.text = "${getString(R.string.notes_prefix)}  ${passwordEntity.notes}"
-                    binding.tvUpdatedAt.text = "${getString(R.string.updatedat_prefix)}  ${passwordEntity.updatedAt}"
+                    binding.tvUpdatedAt.text = "${getString(R.string.updatedat_prefix)}  ${lastUpdatedAt}"
                 }
             } catch (e: PasswordNotFoundException) {
                 withContext(Dispatchers.Main) {

app/src/main/kotlin/com/jeeldobariya/passcodes/utils/Controller.kt

@@ -4,9 +4,6 @@ import android.content.Context
 import com.jeeldobariya.passcodes.database.MasterDatabase
 import com.jeeldobariya.passcodes.database.Password
 import com.jeeldobariya.passcodes.database.PasswordsDao
-import java.text.SimpleDateFormat
-import java.util.Date
-import java.util.Locale
 import kotlinx.coroutines.flow.Flow
 
 class InvalidInputException(message: String = "Input parameters cannot be blank.") : Exception(message)
@@ -34,7 +31,7 @@ class Controller(context: Context) {
             throw InvalidInputException()
         }
 
-        val currentTimestamp = SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.getDefault()).format(Date())
+        val currentTimestamp = DateTimeUtils.getCurrDateTime()
         val newPassword = Password(
             domain = domain,
             username = username,
@@ -106,7 +103,7 @@ class Controller(context: Context) {
             val existingPassword = passwordsDao.getPasswordById(id)
                 ?: throw PasswordNotFoundException("Password with ID $id not found for update.")
 
-            val updatedTimestamp = SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.getDefault()).format(Date())
+            val updatedTimestamp = DateTimeUtils.getCurrDateTime()
             val passwordToUpdate = existingPassword.copy(
                 domain = domain,
                 username = username,

app/src/main/kotlin/com/jeeldobariya/passcodes/utils/DateTimeUtils.kt

@@ -0,0 +1,55 @@
+package com.jeeldobariya.passcodes.utils
+
+import java.text.SimpleDateFormat
+import java.util.Date
+import java.util.Locale
+import java.util.concurrent.TimeUnit
+
+class DateTimeUtils {
+    companion object {
+        /** Returns current date-time in `yyyy-MM-dd HH:mm:ss` format */
+        fun getCurrDateTime(): String {
+            return SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.getDefault())
+                .format(Date())
+        }
+
+        /** Returns current date in `yyyy-MM-dd` format */
+        fun getCurrDate(): String {
+            return SimpleDateFormat("yyyy-MM-dd", Locale.getDefault())
+                .format(Date())
+        }
+
+        /** Returns current time in `HH:mm:ss` format */
+        fun getCurrTime(): String {
+            return SimpleDateFormat("HH:mm:ss", Locale.getDefault())
+                .format(Date())
+        }
+
+        /** Parse a String into a Date with a given pattern */
+        fun parseDate(dateStr: String, pattern: String = "yyyy-MM-dd HH:mm:ss"): Date? {
+            return try {
+                SimpleDateFormat(pattern, Locale.getDefault()).parse(dateStr)
+            } catch (e: Exception) {
+                null
+            }
+        }
+
+        fun getRelativeDays(dateStr: String, pattern: String = "yyyy-MM-dd"): String {
+            return try {
+                val parsedDate = parseDate(dateStr, pattern) ?: return "Invalid date"
+
+                val now = System.currentTimeMillis()
+                val diff = parsedDate.time - now
+                val days = TimeUnit.MILLISECONDS.toDays(diff)
+
+                when {
+                    days == 0L -> "today"
+                    days > 0L -> "in $days day${if (days > 1) "s" else ""}"
+                    else -> "${-days} day${if (days < -1) "s" else ""} ago"
+                }
+            } catch (e: Exception) {
+                "Invalid date format"
+            }
+        }
+    }
+}

app/src/main/res/layout/activity_password_manager.xml

@@ -4,7 +4,7 @@
     android:layout_height="match_parent"
     android:gravity="center"
     android:orientation="vertical"
-    tools:context=".ui.PasswordManager"
+    tools:context=".ui.PasswordManagerActivity"
     android:padding="4sp" >
 
     <com.google.android.material.textview.MaterialTextView 
@@ -37,7 +37,7 @@
         android:text="@string/load_password_button_text"
         android:textSize="14dp" />
 
-        <com.google.android.material.button.MaterialButton
+      <com.google.android.material.button.MaterialButton
         android:enabled="false"
         android:id="@+id/import_password_btn"
         android:layout_width="match_parent"

app/src/main/res/layout/activity_settings.xml

@@ -39,7 +39,7 @@
                 android:layout_height="wrap_content"
                 android:text="@string/label_language_setting"
                 android:textColor="?attr/colorPrimary"
-                android:textSize="24sp"
+                android:textSize="16sp"
                 android:layout_gravity="left|center_vertical"
                 android:layout_margin="8dp" />
 
@@ -58,7 +58,7 @@
         android:id="@+id/theme_card"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_marginTop="16dp"
+        android:layout_marginTop="24dp"
         app:cardCornerRadius="16dp">
 
         <LinearLayout
@@ -73,7 +73,7 @@
                 android:layout_height="wrap_content"
                 android:text="@string/label_theme_setting"
                 android:textColor="?attr/colorPrimary"
-                android:textSize="24sp"
+                android:textSize="16sp"
                 android:layout_gravity="left|center_vertical"
                 android:layout_margin="8dp" />
 
@@ -82,10 +82,40 @@
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:text="@string/toggle_theme_button_text"
-                android:textSize="14dp"
+                android:textSize="12sp"
                 android:layout_gravity="right|center_vertical" />
 
         </LinearLayout>
     </com.google.android.material.card.MaterialCardView>
 
+    <com.google.android.material.card.MaterialCardView
+        android:id="@+id/latest_features_card"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="24dp"
+        app:cardCornerRadius="16dp">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal"
+            android:gravity="center"
+            android:padding="16dp">
+
+            <com.google.android.material.textview.MaterialTextView
+                android:textColor="?attr/colorPrimary"
+                android:text="@string/latest_feature"
+                android:textSize="16sp"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_margin="8dp" />
+
+            <com.google.android.material.materialswitch.MaterialSwitch
+                android:id="@+id/switch_latest_features"
+                android:layout_width="wrap_content"
+                android:layout_height="match_parent"
+                tools:ignore="UseSwitchCompatOrMaterialXml"
+                android:layout_margin="8dp"/>
+        </LinearLayout>
+    </com.google.android.material.card.MaterialCardView>
 </LinearLayout>

app/src/main/res/layout/activity_view_password.xml

@@ -74,26 +74,23 @@
 
     <com.google.android.material.button.MaterialButton
       android:id="@+id/copy_password_btn"
-      android:textColor="?attr/colorSecondary"
-      app:backgroundTint="?attr/colorSecondaryContainer"
+      style="@style/Widget.Material3.Button.TonalButton"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:text="@string/copy_password_button_text"
       android:textSize="14dp" />
 
     <com.google.android.material.button.MaterialButton
       android:id="@+id/update_password_btn"
-      android:textColor="?attr/colorSecondary"
-      app:backgroundTint="?attr/colorSecondaryContainer"
+      style="@style/Widget.Material3.Button.TonalButton"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:text="@string/update_password_button_text"
       android:textSize="14dp" />
 
-	  <com.google.android.material.button.MaterialButton
+	<com.google.android.material.button.MaterialButton
       android:id="@+id/delete_password_btn"
-      android:textColor="?attr/colorError"
-      app:backgroundTint="?attr/colorErrorContainer"
+      style="@style/Widget.Material3.Button.TonalButton"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:text="@string/delete_password_button_text"

app/src/main/res/values-night/themes.xml

@@ -184,8 +184,8 @@
         <item name="android:navigationBarColor">@android:color/transparent</item>
         <item name="android:statusBarColor">@android:color/transparent</item>
         <item name="android:windowTranslucentNavigation">false</item>
-        <item name="android:windowLightNavigationBar" tools:targetApi="o_mr1">true</item>
-        <item name="android:windowLightStatusBar">true</item>
+        <item name="android:windowLightNavigationBar" tools:targetApi="o_mr1">false</item>
+        <item name="android:windowLightStatusBar">false</item>
     </style>
 
 </resources>

app/src/main/res/values/strings.xml

@@ -39,6 +39,7 @@
     <string name="label_language_setting">Language: </string>
     <string name="label_contributor">Contributor: </string>
     <string name="label_theme_setting">Themes: </string>
+    <string name="latest_feature" translatable="false">Preview Features: </string>
     <string name="about_us_button_text">About Us</string>
 
     <!-- Hyper Text Link Buttons Text -->

app/src/main/res/values/themes.xml

@@ -186,5 +186,4 @@
         <item name="android:windowLightNavigationBar" tools:targetApi="o_mr1">true</item>
         <item name="android:windowLightStatusBar">true</item>
     </style>
-
 </resources>