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package ca.allanwang.kau.xml
import android.content.Context
import android.content.res.XmlResourceParser
import androidx.annotation.ColorInt
import androidx.annotation.LayoutRes
import androidx.annotation.XmlRes
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.TextView
import androidx.recyclerview.widget.RecyclerView
import ca.allanwang.kau.R
import ca.allanwang.kau.utils.materialDialog
import ca.allanwang.kau.utils.use
import com.afollestad.materialdialogs.MaterialDialog
import org.jetbrains.anko.doAsync
import org.jetbrains.anko.uiThread
import org.xmlpull.v1.XmlPullParser
/**
* Created by Allan Wang on 2017-05-28.
*
* Easy changelog loader
*/
fun Context.showChangelog(@XmlRes xmlRes: Int, @ColorInt textColor: Int? = null, customize: MaterialDialog.Builder.() -> Unit = {}) {
doAsync {
val items = parse(this@showChangelog, xmlRes)
uiThread {
materialDialog {
title(R.string.kau_changelog)
positiveText(R.string.kau_great)
adapter(ChangelogAdapter(items, textColor), null)
customize()
}
}
}
}
/**
* Internals of the changelog dialog
* Contains an mainAdapter for each item, as well as the tags to parse
*/
internal class ChangelogAdapter(val items: List<Pair<String, ChangelogType>>, @ColorInt val textColor: Int? = null) : RecyclerView.Adapter<ChangelogAdapter.ChangelogVH>() {
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) = ChangelogVH(LayoutInflater.from(parent.context)
.inflate(items[viewType].second.layout, parent, false))
override fun onBindViewHolder(holder: ChangelogVH, position: Int) {
holder.text.text = items[position].first
if (textColor != null) {
holder.text.setTextColor(textColor)
holder.bullet?.setTextColor(textColor)
}
}
override fun getItemId(position: Int) = position.toLong()
override fun getItemViewType(position: Int) = position
override fun getItemCount() = items.size
internal class ChangelogVH(itemView: View) : RecyclerView.ViewHolder(itemView) {
val text: TextView = itemView.findViewById(R.id.kau_changelog_text)
val bullet: TextView? = itemView.findViewById(R.id.kau_changelog_bullet)
}
}
internal fun parse(context: Context, @XmlRes xmlRes: Int): List<Pair<String, ChangelogType>> {
val items = mutableListOf<Pair<String, ChangelogType>>()
context.resources.getXml(xmlRes).use { parser: XmlResourceParser ->
var eventType = parser.eventType
while (eventType != XmlPullParser.END_DOCUMENT) {
if (eventType == XmlPullParser.START_TAG)
ChangelogType.values.any { it.add(parser, items) }
eventType = parser.next()
}
}
return items
}
internal enum class ChangelogType(val tag: String, val attr: String, @LayoutRes val layout: Int) {
TITLE("version", "title", R.layout.kau_changelog_title),
ITEM("item", "text", R.layout.kau_changelog_content);
companion object {
val values = values()
}
/**
* Returns true if tag matches; false otherwise
*/
fun add(parser: XmlResourceParser, list: MutableList<Pair<String, ChangelogType>>): Boolean {
if (parser.name != tag) return false
if (parser.getAttributeValue(null, attr).isNotBlank())
list.add(Pair(parser.getAttributeValue(null, attr), this))
return true
}
}
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