1 package net.pterodactylus.rhynodge.webpages.weather.wettercom
3 import net.pterodactylus.rhynodge.Filter
4 import net.pterodactylus.rhynodge.State
5 import net.pterodactylus.rhynodge.states.FailedState
6 import net.pterodactylus.rhynodge.states.HtmlState
7 import net.pterodactylus.rhynodge.webpages.weather.toWindDirection
8 import org.jsoup.nodes.Document
9 import org.jsoup.nodes.Element
10 import java.time.LocalDateTime
11 import java.time.ZoneId.of
12 import java.time.ZonedDateTime
13 import java.time.format.DateTimeFormatter
16 * HTML parser for [wetter.com](https://www.wetter.com/).
18 * @author [David ‘Bombe’ Roden](mailto:bombe@pterodactylus.net)
20 class WetterComFilter : Filter {
22 private val dateTimeFormatter = DateTimeFormatter.ofPattern("dd.MM.yyyy HH:mm")
24 override fun filter(state: State): State {
25 if (state.success().not()) {
26 return FailedState.from(state)
28 if (state !is HtmlState) {
29 throw IllegalArgumentException("")
32 return parseWetterComState(state)
35 private fun parseWetterComState(state: HtmlState): State {
36 val dateTime = parseDateTime(state.document()) ?: return FailedState(IllegalArgumentException("no date present"))
37 val wetterComState = WetterComState(dateTime)
38 parseHourStates(state.document()).forEach { wetterComState.addHour(it) }
42 private fun parseDateTime(document: Document): ZonedDateTime? {
43 val dateElement = document.select("#furtherDetails .portable-mb h3")
44 .single()?.text()?.split(",")?.get(1)?.trim() ?: return null
45 val timeElement = document.select(".weather-strip--detail .delta.palm-hide")
46 .first()?.text()?.split(" ")?.first() ?: return null
47 return LocalDateTime.from(dateTimeFormatter.parse("%s %s".format(dateElement, timeElement))).atZone(of("Europe/Berlin"))
50 private fun parseHourStates(document: Document): List<HourState> {
51 return document.select(".weather-strip--detail").mapIndexed { index, element -> parseHourState(index, element) }
54 private fun parseHourState(index: Int, hourElement: Element): HourState {
55 return HourState.atHour(index)
56 .temperature(parseTemperature(hourElement))
57 .rainProbability(parseRainProbability(hourElement))
58 .rainAmount(parseRainAmount(hourElement))
59 .windFrom(parseWindDirection(hourElement))
60 .at(parseWindSpeed(hourElement))
61 .describedAs(parseDescription(hourElement))
62 .withImage(parseImageUrl(hourElement))
66 private fun parseTemperature(hourElement: Element) =
67 hourElement.extractText(".weather-strip__2 .item-weathericon .palm-hide").filter { (it >= '0') and (it <= '9') }.toDouble()
69 private fun parseRainProbability(hourElement: Element) =
70 hourElement.extractText(".weather-strip__3 .text--left:eq(0) .flag__body span:eq(0)").filter { (it >= '0') and (it <= '9') }.toDouble() / 100.0
72 private fun parseRainAmount(hourElement: Element) =
73 hourElement.extractText(".weather-strip__3 .text--left:eq(0) .flag__body span:eq(1)").trim().split(" ").getOrNull(1)?.toDouble() ?: 0.0
75 private fun parseWindDirection(hourElement: Element) =
76 hourElement.extractText(".weather-strip__3 .text--left:eq(1) .flag__body span:eq(0)").trim().split(",")[0].toWindDirection()
78 private fun parseWindSpeed(hourElement: Element) =
79 hourElement.extractText(".weather-strip__3 .text--left:eq(1) .flag__body span:eq(0)").split(Regex("[, ]+"))[1].toDouble()
81 private fun parseDescription(hourElement: Element) =
82 hourElement.extractText(".weather-strip__1 .vhs-text--small")
84 private fun parseImageUrl(hourElement: Element) =
85 hourElement.select(".weather-strip__2 img").firstOrNull()?.attr("src") ?: ""
87 private fun Element.extractText(selector: String) = select(selector).firstOrNull()?.text() ?: ""