NewPipe/app/src/main/java/org/schabi/newpipe/about/AboutActivity.kt

package org.schabi.newpipe.about

import android.os.Bundle
import android.view.LayoutInflater
import android.view.MenuItem
import android.view.View
import android.view.ViewGroup
import android.widget.Button
import androidx.appcompat.app.AppCompatActivity
import androidx.fragment.app.Fragment
import androidx.fragment.app.FragmentActivity
import androidx.viewpager2.adapter.FragmentStateAdapter
import com.google.android.material.tabs.TabLayoutMediator
import org.schabi.newpipe.BuildConfig
import org.schabi.newpipe.R
import org.schabi.newpipe.databinding.ActivityAboutBinding
import org.schabi.newpipe.databinding.FragmentAboutBinding
import org.schabi.newpipe.util.Localization
import org.schabi.newpipe.util.ThemeHelper
import org.schabi.newpipe.util.external_communication.ShareUtils

class AboutActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        Localization.assureCorrectAppLanguage(this)
        super.onCreate(savedInstanceState)
        ThemeHelper.setTheme(this)
        title = getString(R.string.title_activity_about)

        val aboutBinding = ActivityAboutBinding.inflate(layoutInflater)
        setContentView(aboutBinding.root)
        setSupportActionBar(aboutBinding.aboutToolbar)
        supportActionBar?.setDisplayHomeAsUpEnabled(true)

        // Create the adapter that will return a fragment for each of the three
        // primary sections of the activity.
        val mAboutStateAdapter = AboutStateAdapter(this)
        // Set up the ViewPager with the sections adapter.
        aboutBinding.aboutViewPager2.adapter = mAboutStateAdapter
        TabLayoutMediator(
            aboutBinding.aboutTabLayout,
            aboutBinding.aboutViewPager2
        ) { tab, position ->
            tab.setText(mAboutStateAdapter.getPageTitle(position))
        }.attach()
    }

    override fun onOptionsItemSelected(item: MenuItem): Boolean {
        if (item.itemId == android.R.id.home) {
            finish()
            return true
        }
        return super.onOptionsItemSelected(item)
    }

    /**
     * A placeholder fragment containing a simple view.
     */
    class AboutFragment : Fragment() {
        private fun Button.openLink(url: Int) {
            setOnClickListener {
                ShareUtils.openUrlInBrowser(
                    context,
                    requireContext().getString(url),
                    false
                )
            }
        }

        override fun onCreateView(
            inflater: LayoutInflater,
            container: ViewGroup?,
            savedInstanceState: Bundle?
        ): View {
            FragmentAboutBinding.inflate(inflater, container, false).apply {
                aboutAppVersion.text = BuildConfig.VERSION_NAME
                aboutGithubLink.openLink(R.string.github_url)
                aboutDonationLink.openLink(R.string.donation_url)
                aboutWebsiteLink.openLink(R.string.website_url)
                aboutPrivacyPolicyLink.openLink(R.string.privacy_policy_url)
                faqLink.openLink(R.string.faq_url)
                return root
            }
        }
    }

    /**
     * A [FragmentStateAdapter] that returns a fragment corresponding to
     * one of the sections/tabs/pages.
     */
    private class AboutStateAdapter(fa: FragmentActivity) : FragmentStateAdapter(fa) {
        private val posAbout = 0
        private val posLicense = 1
        private val totalCount = 2

        override fun createFragment(position: Int): Fragment {
            return when (position) {
                posAbout -> AboutFragment()
                posLicense -> LicenseFragment.newInstance(SOFTWARE_COMPONENTS)
                else -> throw IllegalArgumentException("Unknown position for ViewPager2")
            }
        }

        override fun getItemCount(): Int {
            // Show 2 total pages.
            return totalCount
        }

        fun getPageTitle(position: Int): Int {
            return when (position) {
                posAbout -> R.string.tab_about
                posLicense -> R.string.tab_licenses
                else -> throw IllegalArgumentException("Unknown position for ViewPager2")
            }
        }
    }

    companion object {
        /**
         * List of all software components.
         */
        private val SOFTWARE_COMPONENTS = arrayOf(
            SoftwareComponent(
                "ACRA", "2013", "Kevin Gaudin",
                "https://github.com/ACRA/acra", StandardLicenses.APACHE2
            ),
            SoftwareComponent(
                "AndroidX", "2005 - 2011", "The Android Open Source Project",
                "https://developer.android.com/jetpack", StandardLicenses.APACHE2
            ),
            SoftwareComponent(
                "ExoPlayer", "2014 - 2020", "Google, Inc.",
                "https://github.com/google/ExoPlayer", StandardLicenses.APACHE2
            ),
            SoftwareComponent(
                "GigaGet", "2014 - 2015", "Peter Cai",
                "https://github.com/PaperAirplane-Dev-Team/GigaGet", StandardLicenses.GPL3
            ),
            SoftwareComponent(
                "Groupie", "2016", "Lisa Wray",
                "https://github.com/lisawray/groupie", StandardLicenses.MIT
            ),
            SoftwareComponent(
                "Icepick", "2015", "Frankie Sardo",
                "https://github.com/frankiesardo/icepick", StandardLicenses.EPL1
            ),
            SoftwareComponent(
                "Jsoup", "2009 - 2020", "Jonathan Hedley",
                "https://github.com/jhy/jsoup", StandardLicenses.MIT
            ),
            SoftwareComponent(
                "Markwon", "2019", "Dimitry Ivanov",
                "https://github.com/noties/Markwon", StandardLicenses.APACHE2
            ),
            SoftwareComponent(
                "Material Components for Android", "2016 - 2020", "Google, Inc.",
                "https://github.com/material-components/material-components-android",
                StandardLicenses.APACHE2
            ),
            SoftwareComponent(
                "NewPipe Extractor", "2017 - 2020", "Christian Schabesberger",
                "https://github.com/TeamNewPipe/NewPipeExtractor", StandardLicenses.GPL3
            ),
            SoftwareComponent(
                "NoNonsense-FilePicker", "2016", "Jonas Kalderstam",
                "https://github.com/spacecowboy/NoNonsense-FilePicker", StandardLicenses.MPL2
            ),
            SoftwareComponent(
                "OkHttp", "2019", "Square, Inc.",
                "https://square.github.io/okhttp/", StandardLicenses.APACHE2
            ),
            SoftwareComponent(
                "Picasso", "2013", "Square, Inc.",
                "https://square.github.io/picasso/", StandardLicenses.APACHE2
            ),
            SoftwareComponent(
                "PrettyTime", "2012 - 2020", "Lincoln Baxter, III",
                "https://github.com/ocpsoft/prettytime", StandardLicenses.APACHE2
            ),
            SoftwareComponent(
                "ProcessPhoenix", "2015", "Jake Wharton",
                "https://github.com/JakeWharton/ProcessPhoenix", StandardLicenses.APACHE2
            ),
            SoftwareComponent(
                "RxAndroid", "2015", "The RxAndroid authors",
                "https://github.com/ReactiveX/RxAndroid", StandardLicenses.APACHE2
            ),
            SoftwareComponent(
                "RxBinding", "2015", "Jake Wharton",
                "https://github.com/JakeWharton/RxBinding", StandardLicenses.APACHE2
            ),
            SoftwareComponent(
                "RxJava", "2016 - 2020", "RxJava Contributors",
                "https://github.com/ReactiveX/RxJava", StandardLicenses.APACHE2
            ),
            SoftwareComponent(
                "SearchPreference", "2018", "ByteHamster",
                "https://github.com/ByteHamster/SearchPreference", StandardLicenses.MIT
            ),
        )
    }
}