Warn on plugged in

Signed-off-by: Tyler Nijmeh <tylernij@gmail.com>

2 files changed, 37 insertions, 6 deletions

diff --git a/app/src/main/java/com/draco/buoy/fragments/MainPreferenceFragment.kt b/app/src/main/java/com/draco/buoy/fragments/MainPreferenceFragment.kt
index 7cf5f34..a1f84b1 100644
--- a/app/src/main/java/com/draco/buoy/fragments/MainPreferenceFragment.kt
+++ b/app/src/main/java/com/draco/buoy/fragments/MainPreferenceFragment.kt
@@ -1,9 +1,8 @@
 package com.draco.buoy.fragments
 
-import android.content.Context
-import android.content.Intent
-import android.content.SharedPreferences
+import android.content.*
 import android.net.Uri
+import android.os.BatteryManager
 import android.os.Build
 import android.os.Bundle
 import androidx.preference.*
@@ -80,9 +79,17 @@ class MainPreferenceFragment : PreferenceFragmentCompat(), SharedPreferences.OnS
         refreshSettings()
         lockSettings()
 
-        /**
-         * On import text changed, apply the new configuration
-         */
+        /* Listen for power plugged or unplugged */
+        val connectionChangedIntent = IntentFilter()
+        connectionChangedIntent.addAction(Intent.ACTION_POWER_CONNECTED)
+        requireContext().registerReceiver(connectionChangedReceiver, connectionChangedIntent)
+
+        /* Check now */
+        val batteryManager = requireContext().getSystemService(Context.BATTERY_SERVICE) as BatteryManager
+        if (batteryManager.isCharging)
+            pluggedInAlert()
+
+        /* On import text changed, apply the new configuration */
         findPreference<EditTextPreference>(getString(R.string.pref_key_import))?.let {
             it.setOnPreferenceChangeListener { _, newValue ->
                 batterySaverManager.setConstantsString(newValue as String)
@@ -92,6 +99,11 @@ class MainPreferenceFragment : PreferenceFragmentCompat(), SharedPreferences.OnS
         }
     }
 
+    override fun onDestroy() {
+        super.onDestroy()
+        requireContext().unregisterReceiver(connectionChangedReceiver)
+    }
+
     override fun onPreferenceTreeClick(preference: Preference): Boolean {
         when (preference.key) {
             getString(R.string.pref_profile_key_reset) -> {
@@ -237,4 +249,22 @@ class MainPreferenceFragment : PreferenceFragmentCompat(), SharedPreferences.OnS
     override fun onSharedPreferenceChanged(sharedPreferences: SharedPreferences?, key: String?) {
         applySettings()
     }
+
+    /**
+     * Warn the user that low power mode won't work until the device is on battery power
+     */
+    private fun pluggedInAlert() {
+        Snackbar.make(requireView(), getString(R.string.snackbar_plugged_in), Snackbar.LENGTH_LONG).show()
+    }
+
+    /**
+     * On power change, enable or disable all settings
+     */
+    private var connectionChangedReceiver = object : BroadcastReceiver() {
+        override fun onReceive(context: Context, intent: Intent) {
+            when (intent.action) {
+                Intent.ACTION_POWER_CONNECTED -> pluggedInAlert()
+            }
+        }
+    }
 }
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index ec44fc3..5976dcd 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -11,6 +11,7 @@
     <string name="copied">Copied to clipboard</string>
 
     <string name="snackbar_intent_failed">Could not handle this action</string>
+    <string name="snackbar_plugged_in">Buoy will take effect when device is unplugged</string>
 
     <string name="developer_url">https://www.github.com/tytydraco</string>
     <string name="source_url">https://www.github.com/tytydraco/Buoy</string>