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path: root/app/src/main/java/com/draco/buoy/fragments/MainPreferenceFragment.kt
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package com.draco.buoy.fragments

import android.content.*
import android.net.Uri
import android.os.Build
import android.os.Bundle
import androidx.preference.*
import com.draco.buoy.R
import com.draco.buoy.models.BatterySaverConstantsConfig
import com.draco.buoy.repositories.profiles.BatterySaverConstantsConfigProfiles
import com.draco.buoy.utils.BatterySaverManager
import com.google.android.gms.oss.licenses.OssLicensesMenuActivity
import com.google.android.material.snackbar.Snackbar

class MainPreferenceFragment : PreferenceFragmentCompat(), SharedPreferences.OnSharedPreferenceChangeListener {
    private lateinit var batterySaverManager: BatterySaverManager

    private lateinit var advertiseIsEnabled: SwitchPreference
    private lateinit var dataSaverEnabled: SwitchPreference
    private lateinit var enableNightMode: SwitchPreference
    private lateinit var launchBoostEnabled: SwitchPreference
    private lateinit var vibrationEnabled: SwitchPreference
    private lateinit var animationEnabled: SwitchPreference
    private lateinit var soundTriggerEnabled: SwitchPreference
    private lateinit var fullBackupDeferred: SwitchPreference
    private lateinit var keyValueBackupDeferred: SwitchPreference
    private lateinit var fireWallEnabled: SwitchPreference
    private lateinit var gpsMode: ListPreference
    private lateinit var adjustBrightnessEnabled: SwitchPreference
    private lateinit var adjustBrightnessFactor: SeekBarPreference
    private lateinit var forceAllAppsStandby: SwitchPreference
    private lateinit var forceBackgroundCheck: SwitchPreference
    private lateinit var optionalSensorsEnabled: SwitchPreference
    private lateinit var aodEnabled: SwitchPreference
    private lateinit var quickDozeEnabled: SwitchPreference

    override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
        setPreferencesFromResource(R.xml.main, rootKey)
    }

    override fun onAttach(context: Context) {
        super.onAttach(context)
        batterySaverManager = BatterySaverManager(context.contentResolver)
    }

    override fun onResume() {
        super.onResume()
        preferenceManager.sharedPreferences.registerOnSharedPreferenceChangeListener(this)
    }

    override fun onPause() {
        super.onPause()
        preferenceManager.sharedPreferences.unregisterOnSharedPreferenceChangeListener(this)
    }

    override fun onActivityCreated(savedInstanceState: Bundle?) {
        super.onActivityCreated(savedInstanceState)

        advertiseIsEnabled = findPreference(getString(R.string.pref_config_key_advertise_is_enabled))!!
        dataSaverEnabled = findPreference(getString(R.string.pref_config_key_datasaver_enabled))!!
        enableNightMode = findPreference(getString(R.string.pref_config_key_enable_night_mode))!!
        launchBoostEnabled = findPreference(getString(R.string.pref_config_key_launch_boost_enabled))!!
        vibrationEnabled = findPreference(getString(R.string.pref_config_key_vibration_enabled))!!
        animationEnabled = findPreference(getString(R.string.pref_config_key_animation_enabled))!!
        soundTriggerEnabled = findPreference(getString(R.string.pref_config_key_soundtrigger_enabled))!!
        fullBackupDeferred = findPreference(getString(R.string.pref_config_key_fullbackup_deferred))!!
        keyValueBackupDeferred = findPreference(getString(R.string.pref_config_key_keyvaluebackup_deferred))!!
        fireWallEnabled = findPreference(getString(R.string.pref_config_key_firewall_enabled))!!
        gpsMode = findPreference(getString(R.string.pref_config_key_gps_mode))!!
        adjustBrightnessEnabled = findPreference(getString(R.string.pref_config_key_adjust_brightness_enabled))!!
        adjustBrightnessFactor = findPreference(getString(R.string.pref_config_key_adjust_brightness_factor))!!
        forceAllAppsStandby = findPreference(getString(R.string.pref_config_key_force_all_apps_standby))!!
        forceBackgroundCheck = findPreference(getString(R.string.pref_config_key_force_background_check))!!
        optionalSensorsEnabled = findPreference(getString(R.string.pref_config_key_optional_sensors_enabled))!!
        aodEnabled = findPreference(getString(R.string.pref_config_key_aod_enabled))!!
        quickDozeEnabled = findPreference(getString(R.string.pref_config_key_quick_doze_enabled))!!

        refreshSettings()
        lockSettings()

        /* Alert the user that LPM is not enabled */
        if (!batterySaverManager.getLowPower())
            Snackbar.make(requireView(), getString(R.string.snackbar_low_power), Snackbar.LENGTH_SHORT).show()

        /* 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)
                refreshSettings()
                return@setOnPreferenceChangeListener true
            }
        }
    }

    override fun onPreferenceTreeClick(preference: Preference): Boolean {
        when (preference.key) {
            getString(R.string.pref_profile_key_default) -> {
                batterySaverManager.resetToDefault()
                refreshSettings()
            }
            getString(R.string.pref_profile_key_light) -> {
                batterySaverManager.apply(BatterySaverConstantsConfigProfiles.LIGHT)
                refreshSettings()
            }
            getString(R.string.pref_profile_key_moderate) -> {
                batterySaverManager.apply(BatterySaverConstantsConfigProfiles.MODERATE)
                refreshSettings()
            }
            getString(R.string.pref_profile_key_high) -> {
                batterySaverManager.apply(BatterySaverConstantsConfigProfiles.HIGH)
                refreshSettings()
            }
            getString(R.string.pref_profile_key_extreme) -> {
                batterySaverManager.apply(BatterySaverConstantsConfigProfiles.EXTREME)
                refreshSettings()
            }

            getString(R.string.pref_key_export) -> exportSettings()
            getString(R.string.pref_key_import) -> (preference as EditTextPreference).text = batterySaverManager.getConstantsString()

            getString(R.string.pref_developer_key) -> openURL(getString(R.string.developer_url))
            getString(R.string.pref_source_key) -> openURL(getString(R.string.source_url))
            getString(R.string.pref_contact_key) -> openURL(getString(R.string.contact_url))
            getString(R.string.pref_licenses_key) -> {
                val intent = Intent(requireContext(), OssLicensesMenuActivity::class.java)
                startActivity(intent)
            }
            else -> return super.onPreferenceTreeClick(preference)
        }
        return true
    }

    /**
     * Lock specific settings if the Android version does not support it
     */
    private fun lockSettings() {
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) {
            advertiseIsEnabled.isVisible = false
            dataSaverEnabled.isVisible = false
            enableNightMode.isVisible = false
            launchBoostEnabled.isVisible = false
            forceAllAppsStandby.isVisible = false
            forceBackgroundCheck.isVisible = false
            optionalSensorsEnabled.isVisible = false
            aodEnabled.isVisible = false
            quickDozeEnabled.isVisible = false
        }
    }

    /**
     * Show the user a dialog where they can export the constants
     */
    private fun exportSettings() {
        val intent = Intent()
            .setAction(Intent.ACTION_SEND)
            .putExtra(Intent.EXTRA_TEXT, batterySaverManager.getConstantsString())
            .setType("text/plain")
        val chooser = Intent.createChooser(intent, getString(R.string.export_share_title))
        startActivity(chooser)
    }

    /**
     * Update the UI to show the new constants
     */
    private fun refreshSettings() {
        /* Take existing constants and apply to the default config as overrides */
        val currentProfileString = batterySaverManager.getConstantsString()
        val currentProfile = BatterySaverConstantsConfig().also {
            if (currentProfileString != null)
                it.import(currentProfileString)
        }

        advertiseIsEnabled.isChecked = currentProfile.advertiseIsEnabled
        dataSaverEnabled.isChecked = !currentProfile.dataSaverDisabled
        enableNightMode.isChecked = currentProfile.enableNightMode
        launchBoostEnabled.isChecked = !currentProfile.launchBoostDisabled
        vibrationEnabled.isChecked = !currentProfile.vibrationDisabled
        animationEnabled.isChecked = !currentProfile.animationDisabled
        soundTriggerEnabled.isChecked = !currentProfile.soundTriggerDisabled
        fullBackupDeferred.isChecked = currentProfile.fullBackupDeferred
        keyValueBackupDeferred.isChecked = currentProfile.keyValueBackupDeferred
        fireWallEnabled.isChecked = !currentProfile.fireWallDisabled
        gpsMode.value = currentProfile.gpsMode.toString()
        adjustBrightnessEnabled.isChecked = !currentProfile.adjustBrightnessDisabled
        adjustBrightnessFactor.value = (currentProfile.adjustBrightnessFactor * 100).toInt()
        forceAllAppsStandby.isChecked = currentProfile.forceAllAppsStandby
        forceBackgroundCheck.isChecked = currentProfile.forceBackgroundCheck
        optionalSensorsEnabled.isChecked = !currentProfile.optionalSensorsDisabled
        aodEnabled.isChecked = !currentProfile.aodDisabled
        quickDozeEnabled.isChecked = currentProfile.quickDozeEnabled
    }

    /**
     * Take the UI settings and apply them as constants
     */
    private fun applySettings() {
        val config = BatterySaverConstantsConfig(
            advertiseIsEnabled.isChecked,
            !dataSaverEnabled.isChecked,
            enableNightMode.isChecked,
            !launchBoostEnabled.isChecked,
            !vibrationEnabled.isChecked,
            !animationEnabled.isChecked,
            !soundTriggerEnabled.isChecked,
            fullBackupDeferred.isChecked,
            keyValueBackupDeferred.isChecked,
            !fireWallEnabled.isChecked,
            gpsMode.value.toInt(),
            !adjustBrightnessEnabled.isChecked,
            adjustBrightnessFactor.value / 100f,
            forceAllAppsStandby.isChecked,
            forceBackgroundCheck.isChecked,
            !optionalSensorsEnabled.isChecked,
            !aodEnabled.isChecked,
            quickDozeEnabled.isChecked
        )
        try {
            batterySaverManager.apply(config)
        } catch (e: Exception) {
            e.printStackTrace()
            Snackbar.make(requireView(), getString(R.string.snackbar_failed_to_apply), Snackbar.LENGTH_SHORT).show()
        }
    }

    /**
     * Open a URL for the user
     */
    private fun openURL(url: String) {
        val intent = Intent(Intent.ACTION_VIEW, Uri.parse(url))
        try {
            startActivity(intent)
        } catch (e: Exception) {
            e.printStackTrace()
            Snackbar.make(requireView(), getString(R.string.snackbar_intent_failed), Snackbar.LENGTH_SHORT).show()
        }
    }

    /**
     * When settings are changed, apply the new config
     */
    override fun onSharedPreferenceChanged(sharedPreferences: SharedPreferences?, key: String?) {
        applySettings()
    }
}