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/*
* Tinc App, an Android binding and user interface for the tinc mesh VPN daemon
* Copyright (C) 2017-2018 Pacien TRAN-GIRARD
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package org.pacien.tincapp.activities
import android.content.Intent
import android.os.Bundle
import android.view.Menu
import android.view.MenuItem
import android.view.View
import android.widget.ScrollView
import kotlinx.android.synthetic.main.base.*
import kotlinx.android.synthetic.main.page_viewlog.*
import org.pacien.tincapp.R
import org.pacien.tincapp.commands.Executor
import org.pacien.tincapp.commands.Tinc
import org.pacien.tincapp.service.TincVpnService
import java.util.*
import kotlin.concurrent.timer
/**
* @author pacien
*/
class ViewLogActivity : BaseActivity() {
companion object {
private const val LOG_LINES = 250
private const val LOG_LEVEL = 5
private const val NEW_LINE = "\n"
private const val SPACED_NEW_LINE = "\n\n"
private const val UPDATE_INTERVAL = 250L // ms
private const val MIME_TYPE = "text/plain"
}
private val log = LinkedList<String>()
private var logUpdateTimer: Timer? = null
private var logger: Process? = null
private var toggleButton: MenuItem? = null
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
supportActionBar!!.setDisplayHomeAsUpEnabled(true)
layoutInflater.inflate(R.layout.page_viewlog, main_content)
toggleLogging(true)
}
override fun onCreateOptionsMenu(m: Menu): Boolean {
menuInflater.inflate(R.menu.menu_viewlog, m)
toggleButton = m.findItem(R.id.log_viewer_action_toggle)
return super.onCreateOptionsMenu(m)
}
override fun onSupportNavigateUp(): Boolean {
finish()
return true
}
override fun onDestroy() {
toggleLogging(false)
super.onDestroy()
}
fun share(@Suppress("UNUSED_PARAMETER") menuItem: MenuItem) {
synchronized(this) {
val logFragment = log.joinToString(NEW_LINE)
val shareIntent = Intent(Intent.ACTION_SEND)
.setType(MIME_TYPE)
.putExtra(Intent.EXTRA_TEXT, logFragment)
startActivity(Intent.createChooser(shareIntent, resources.getString(R.string.menu_share_log)))
}
}
fun toggleLogging(@Suppress("UNUSED_PARAMETER") menuItem: MenuItem) = toggleLogging(logger == null)
private fun toggleLogging(enable: Boolean) {
if (enable) {
disableUserScroll()
toggleButton?.setIcon(R.drawable.ic_pause_circle_outline_primary_24dp)
startLogging()
} else {
enableUserScroll()
toggleButton?.setIcon(R.drawable.ic_pause_circle_filled_primary_24dp)
stopLogging()
}
}
private fun startLogging(level: Int = LOG_LEVEL) {
appendLog(resources.getString(R.string.message_log_level_set, level))
TincVpnService.getCurrentNetName()?.let { netName ->
Tinc.log(netName, level).let { process ->
logger = process
Executor.runAsyncTask { captureLog(process) }
}
logUpdateTimer = timer(period = UPDATE_INTERVAL, action = { printLog() })
} ?: run {
appendLog(resources.getString(R.string.message_no_daemon))
toggleLogging(false)
}
}
private fun stopLogging() {
logger?.destroy()
logger = null
logUpdateTimer?.cancel()
logUpdateTimer?.purge()
logUpdateTimer = null
appendLog(resources.getString(R.string.message_log_paused))
printLog()
}
private fun captureLog(logger: Process) {
logger.inputStream?.use { inputStream ->
inputStream.bufferedReader().useLines { lines ->
lines.forEach { appendLog(it) }
}
}
}
private fun appendLog(line: String) = synchronized(this) {
if (log.size >= LOG_LINES) log.removeFirst()
log.addLast(line)
}
private fun printLog() = synchronized(this) {
log.joinToString(SPACED_NEW_LINE).let {
logview_text.post {
logview_text.text = it
logview_frame.post { logview_frame.fullScroll(View.FOCUS_DOWN) }
}
}
}
private fun enableUserScroll() {
logview_text.setTextIsSelectable(true)
logview_frame.setState(true)
}
private fun disableUserScroll() {
logview_text.setTextIsSelectable(false)
logview_frame.setState(false)
}
private fun ScrollView.setState(enabled: Boolean) {
if (enabled) setOnTouchListener(null) else setOnTouchListener { _, _ -> true }
logview_frame.isSmoothScrollingEnabled = enabled
logview_frame.isVerticalScrollBarEnabled = enabled
}
}
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