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package ca.allanwang.kau.xml
import android.content.Context
import android.content.res.XmlResourceParser
import android.support.annotation.XmlRes
import android.text.Html
import android.text.Spanned
import ca.allanwang.kau.utils.use
import org.xmlpull.v1.XmlPullParser
/**
* Created by Allan Wang on 2017-07-30.
*/
/**
* Parse an xml with two tags, <question>Text</question> and <answer>Text</answer>,
* and return them as a list of string pairs
*/
fun Context.kauParseFaq(@XmlRes xmlRes: Int, withNumbering: Boolean = true): List<Pair<Spanned, Spanned>> {
val items = mutableListOf<Pair<Spanned, Spanned>>()
resources.getXml(xmlRes).use {
parser: XmlResourceParser ->
var eventType = parser.eventType
var question: Spanned? = null
var flag = -1 //-1, 0, 1 -> invalid, question, answer
while (eventType != XmlPullParser.END_DOCUMENT) {
if (eventType == XmlPullParser.START_TAG) {
flag = when (parser.name) {
"question" -> 0
"answer" -> 1
else -> -1
}
} else if (eventType == XmlPullParser.TEXT) {
when (flag) {
0 -> {
var q = parser.text.replace("\n", "<br/>")
if (withNumbering) q = "${items.size + 1}. $q"
question = Html.fromHtml(q)
flag = -1
}
1 -> {
items.add(Pair(question ?: throw IllegalArgumentException("KAU FAQ answer found without a question"),
Html.fromHtml(parser.text.replace("\n", "<br/>"))))
question = null
flag = -1
}
}
}
eventType = parser.next()
}
}
return items
}
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