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path: root/app/src/main/java/org/traccar/manager/MainFragment.kt
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/*
 * Copyright 2016 - 2021 Anton Tananaev (anton@traccar.org)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
@file:Suppress("DEPRECATION")
package org.traccar.manager

import android.annotation.SuppressLint
import android.app.Activity
import android.content.ActivityNotFoundException
import android.content.BroadcastReceiver
import android.content.Context
import android.content.Intent
import android.content.IntentFilter
import android.content.pm.ApplicationInfo
import android.net.Uri
import android.os.Build
import android.os.Bundle
import android.util.Log
import android.view.View
import android.webkit.*
import android.widget.Toast
import androidx.localbroadcastmanager.content.LocalBroadcastManager
import androidx.preference.PreferenceManager

class MainFragment : WebViewFragment() {

    private lateinit var broadcastManager: LocalBroadcastManager
    private var tokenSet = false

    private val webViewClient = object: WebViewClient() {
        override fun onPageFinished(view: WebView?, url: String?) {
            super.onPageFinished(view, url)
            CookieManager.getInstance().setAcceptCookie(true)
            CookieManager.getInstance().acceptCookie()
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                CookieManager.getInstance().flush()
            }

            CookieManager.getInstance().getCookie(url)?.let {
                if (it.contains("JSESSIONID") && !tokenSet) {
                    // Register token on server
                    if (PreferenceManager.getDefaultSharedPreferences(activity)
                            .contains(MainActivity.PREFERENCE_TOKEN)
                    ) {
                        val token = PreferenceManager.getDefaultSharedPreferences(activity)
                            .getString(MainActivity.PREFERENCE_TOKEN, "")
                        val code = "updateNotificationToken && updateNotificationToken('$token')"
                        Log.d("MainFragment", code)
                        Toast.makeText(activity, code, Toast.LENGTH_LONG).show()
                        webView.evaluateJavascript(code, null)
                        tokenSet = true
                    }
                }
            }
        }
    }

    inner class AppInterface {
        @JavascriptInterface
        fun postMessage(message: String) {
            if (message.startsWith("login")) {
                broadcastManager.sendBroadcast(Intent(EVENT_LOGIN))
            } else if (message.startsWith("server")) {
                val url = message.substring(7)
                PreferenceManager.getDefaultSharedPreferences(activity)
                    .edit().putString(MainActivity.PREFERENCE_URL, url).apply()
                activity.runOnUiThread { webView.loadUrl(url) }
            }
        }
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        broadcastManager = LocalBroadcastManager.getInstance(activity)
    }

    @SuppressLint("SetJavaScriptEnabled")
    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        if ((activity.applicationInfo.flags and ApplicationInfo.FLAG_DEBUGGABLE) != 0) {
            WebView.setWebContentsDebuggingEnabled(true)
        }
        webView.webViewClient = WebViewClient() // handle redirects in the app
        webView.webChromeClient = webChromeClient
        webView.addJavascriptInterface(AppInterface(), "appInterface")
        webView.webViewClient = webViewClient
        val webSettings = webView.settings
        webSettings.javaScriptEnabled = true
        webSettings.domStorageEnabled = true
        webSettings.databaseEnabled = true
        webSettings.mediaPlaybackRequiresUserGesture = false
        val url = PreferenceManager.getDefaultSharedPreferences(activity)
            .getString(MainActivity.PREFERENCE_URL, null)
        if (url != null) {
            webView.loadUrl(Uri.parse(url).buildUpon().appendEncodedPath("gps").build().toString())
        } else {
            activity.fragmentManager
                .beginTransaction().replace(android.R.id.content, StartFragment())
                .commitAllowingStateLoss()
        }
    }

    private val broadcastReceiver: BroadcastReceiver = object : BroadcastReceiver() {
        override fun onReceive(context: Context, intent: Intent) {
            val token = intent.getStringExtra(KEY_TOKEN)
            PreferenceManager.getDefaultSharedPreferences(activity)
                .edit()
                .putString(MainActivity.PREFERENCE_TOKEN, token)
                .apply()
        }
    }

    override fun onStart() {
        super.onStart()
        val intentFilter = IntentFilter(EVENT_TOKEN)
        broadcastManager.registerReceiver(broadcastReceiver, intentFilter)
    }

    override fun onStop() {
        super.onStop()
        broadcastManager.unregisterReceiver(broadcastReceiver)
    }

    private var openFileCallback: ValueCallback<Uri?>? = null
    private var openFileCallback2: ValueCallback<Array<Uri>>? = null

    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        if (requestCode == REQUEST_FILE_CHOOSER) {
            val result = if (resultCode != Activity.RESULT_OK) null else data?.data
            if (openFileCallback != null) {
                openFileCallback?.onReceiveValue(result)
                openFileCallback = null
            }
            if (openFileCallback2 != null) {
                openFileCallback2?.onReceiveValue(if (result != null) arrayOf(result) else arrayOf())
                openFileCallback2 = null
            }
        }
    }

    private val webChromeClient = object : WebChromeClient() {

        // Android 4.1+
        @Suppress("UNUSED_PARAMETER")
        fun openFileChooser(uploadMessage: ValueCallback<Uri?>?, acceptType: String?, capture: String?) {
            openFileCallback = uploadMessage
            val intent = Intent(Intent.ACTION_GET_CONTENT)
            intent.addCategory(Intent.CATEGORY_OPENABLE)
            intent.type = "*/*"
            startActivityForResult(
                Intent.createChooser(intent, getString(R.string.file_browser)),
                REQUEST_FILE_CHOOSER
            )
        }

        // Android 5.0+
        override fun onShowFileChooser(
            mWebView: WebView,
            filePathCallback: ValueCallback<Array<Uri>>,
            fileChooserParams: FileChooserParams
        ): Boolean {
            openFileCallback2?.onReceiveValue(null)
            openFileCallback2 = filePathCallback
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                val intent = fileChooserParams.createIntent()
                try {
                    startActivityForResult(intent, REQUEST_FILE_CHOOSER)
                } catch (e: ActivityNotFoundException) {
                    openFileCallback2 = null
                    return false
                }
            }
            return true
        }
    }

    companion object {
        const val EVENT_LOGIN = "eventLogin"
        const val EVENT_TOKEN = "eventToken"
        const val KEY_TOKEN = "keyToken"
        private const val REQUEST_FILE_CHOOSER = 1
    }
}