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#44 --------- Co-authored-by: Leonard <[email protected]>
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279
app/src/main/java/foss/cnugteren/nlweer/ui/fragments/KnmiSixDayForecastFragment.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,279 @@ | ||
| package foss.cnugteren.nlweer.ui.fragments | ||
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||
| import android.content.res.Resources | ||
| import android.os.AsyncTask | ||
| import android.os.Bundle | ||
| import android.view.LayoutInflater | ||
| import android.view.View | ||
| import android.view.ViewGroup | ||
| import android.webkit.URLUtil | ||
| import androidx.core.view.marginEnd | ||
| import androidx.core.view.marginStart | ||
| import androidx.fragment.app.Fragment | ||
| import androidx.preference.PreferenceManager | ||
| import androidx.swiperefreshlayout.widget.SwipeRefreshLayout | ||
| import foss.cnugteren.nlweer.MainActivity | ||
| import foss.cnugteren.nlweer.R | ||
| import foss.cnugteren.nlweer.databinding.FragmentKnmiSixdayforecastBinding | ||
| import org.jsoup.Jsoup | ||
| import org.jsoup.nodes.Document | ||
| import org.jsoup.nodes.Element | ||
| import kotlin.math.ceil | ||
| import kotlin.math.floor | ||
| import kotlin.math.min | ||
|
|
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| class KnmiSixDayForecastFragment : Fragment() { | ||
|
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| private var _binding: FragmentKnmiSixdayforecastBinding? = null | ||
| // This property is only valid between onCreateView and | ||
| // onDestroyView. | ||
| private val binding get() = _binding!! | ||
|
|
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| override fun onCreateView( | ||
| inflater: LayoutInflater, | ||
| container: ViewGroup?, | ||
| savedInstanceState: Bundle? | ||
| ): View? { | ||
| _binding = FragmentKnmiSixdayforecastBinding.inflate(inflater, container, false) | ||
|
|
||
| // Pull down to refresh the page | ||
| val root = binding.root | ||
| val pullToRefresh = root.findViewById<SwipeRefreshLayout>(R.id.pullToRefresh) | ||
| pullToRefresh.setOnRefreshListener(SwipeRefreshLayout.OnRefreshListener { | ||
| refreshPage() | ||
| pullToRefresh.isRefreshing = false | ||
| }) | ||
|
|
||
| // Do display floating navigation buttons | ||
| val activity = this.activity as MainActivity | ||
| activity.toggleNavigationButtons(true) | ||
|
|
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| // The web-viewer for the content | ||
| val webView = binding.webView | ||
| webView.settings.javaScriptEnabled = true | ||
|
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| loadPage() | ||
|
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| return root | ||
| } | ||
|
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| override fun onDestroyView() { | ||
| super.onDestroyView() | ||
| _binding = null | ||
| } | ||
|
|
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| private fun getURL(): String { | ||
| return "https://www.knmi.nl/nederland-nu/weer/verwachtingen" | ||
| } | ||
|
|
||
| private fun refreshPage() { | ||
| val webView = binding.webView | ||
| webView.clearCache(false) | ||
| loadPage() | ||
| } | ||
|
|
||
| private fun loadPage() { | ||
| val webView = binding.webView | ||
| val htmlBuilder = HtmlBuilder() | ||
| webView.loadData(htmlBuilder.buildHtmlPageWithLoadingMessage(), "text/html", "utf-8") | ||
| RetrieveWebPage().execute(getURL()) | ||
| } | ||
|
|
||
| internal inner class RetrieveWebPage : AsyncTask<String, Void, Document>() { | ||
|
|
||
| // Retrieves the data from the URL using JSoup (async) | ||
| @Deprecated("Deprecated in Java") | ||
| override fun doInBackground(vararg urls: String): Document? { | ||
| try { | ||
| return Jsoup.connect(urls[0]).get() | ||
| } catch (e: Exception) { | ||
| return null | ||
| } | ||
| } | ||
|
|
||
| // When complete: parses the result | ||
| @Deprecated("Deprecated in Java") | ||
| override fun onPostExecute(htmlDocument: Document?) { | ||
| // It may be that the user has already moved on to the next fragment | ||
| if (_binding == null) { | ||
| return | ||
| } | ||
|
|
||
| val webView = binding.webView | ||
| val htmlBuilder = HtmlBuilder() | ||
| if (htmlDocument == null) { | ||
| webView.loadData(htmlBuilder.buildHtmPageWithLoadingError(), "text/html", "utf-8") | ||
| return | ||
| } | ||
|
|
||
| val tableWrapperElement = htmlDocument.select("div.weather-map__table-wrp").firstOrNull() | ||
| if (tableWrapperElement == null){ | ||
| webView.loadData(htmlBuilder.buildHtmPageWithLoadingError(), "text/html", "utf-8") | ||
| return | ||
| } | ||
|
|
||
| val tableData = getTableData(tableWrapperElement) | ||
| val htmlPageToShow = htmlBuilder.buildHtmlPageWithTables(tableData) | ||
| webView.loadData(htmlPageToShow, "text/html", "UTF-8") | ||
| } | ||
|
|
||
| // Get the weather data per day of the week | ||
| private fun getTableData(tableWrapperElement: Element) : Array<Array<String>> { | ||
| val weatherPerDay = tableWrapperElement.select("li") | ||
| val tableData = Array<Array<String>>(weatherPerDay.size, { Array<String>(15, {""}) }) | ||
| weatherPerDay.forEachIndexed { colIndex, column -> | ||
| var rowIndex = 0 | ||
|
|
||
| val dayOfTheWeek = column.selectFirst("strong.weather-map__table-cell") | ||
| ?.text() | ||
| if (dayOfTheWeek != null) { | ||
| tableData[colIndex][rowIndex] = dayOfTheWeek | ||
| rowIndex++ | ||
| } | ||
|
|
||
| column.select("span.weather-map__table-cell").forEach { rowItem -> | ||
| // If cell contains image, get the src link | ||
| val imageItem = rowItem.selectFirst("img") | ||
| if (imageItem != null) { | ||
| tableData[colIndex][rowIndex] = imageItem.attr("src") | ||
| rowIndex++ | ||
| } | ||
| else { | ||
| // Item contains just text; split into header and data, if applicable | ||
| rowItem.text().split(' ', ignoreCase = false, limit = 2).forEach { item -> | ||
| tableData[colIndex][rowIndex] = item | ||
| rowIndex++ | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
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| return tableData | ||
| } | ||
| } | ||
|
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| internal inner class HtmlBuilder { | ||
|
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| // Width in pixels of column containing KNMI weather data | ||
| private val columnWidth get() = 110 | ||
|
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| // Image size in pixels | ||
| private val imageSize get() = 54 | ||
|
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| // Font size to be used in HTML; in pixels | ||
| private val fontSize get() = 14 | ||
|
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| // Row height used for every other row for aesthetic reasons; in pixels | ||
| private val paddedRowHeight get() = 24 | ||
|
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| fun buildHtmlPageWithTables(tableData: Array<Array<String>>) : String { | ||
| val columnsPerTable = calculateColumnsPerTable(tableData) | ||
| val tablesHtml = getHtmlTables(tableData, columnsPerTable) | ||
|
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| return getHtmlPageWithContent(tablesHtml) | ||
| } | ||
|
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| private fun calculateColumnsPerTable(tableData: Array<Array<String>>): Int { | ||
| val webView = binding.webView | ||
| val widthPx = Resources.getSystem().displayMetrics.widthPixels | ||
| val density = Resources.getSystem().displayMetrics.density | ||
| val effectiveWidth = floor((widthPx / density).toDouble()); | ||
| val usableWidth = effectiveWidth - (webView.marginStart + webView.marginEnd) / density | ||
| val columnsPerRow = floor(usableWidth / columnWidth).toInt() | ||
|
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| return min(columnsPerRow, tableData.size) | ||
| } | ||
|
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| private fun getHtmlTables(tableData: Array<Array<String>>, columnsPerTable: Int) : String { | ||
| val numberOfTables = ceil(tableData.size.toDouble() / columnsPerTable).toInt() | ||
| val numberOfRowsPerTable = tableData[0].size | ||
| var htmlTable = "" | ||
| var totalNumberOfColumns = tableData.size | ||
|
|
||
| for (tableNumber in 0..<numberOfTables) { | ||
| htmlTable += """ | ||
| <table> | ||
| <colgroup> | ||
| <col style="min-width:""".trimIndent() + columnWidth + """px" span="""" + totalNumberOfColumns + """" /> | ||
| </colgroup>""".trimMargin() | ||
|
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| for (row in 0..<numberOfRowsPerTable) { | ||
| htmlTable += """<tr>""" | ||
| var column = tableNumber * columnsPerTable | ||
| // Loop until either all columns for the current table have been processed, | ||
| // or all columns have already been processed | ||
| while (column < (tableNumber + 1 ) * columnsPerTable && column < totalNumberOfColumns) { | ||
| var content = tableData[column][row] | ||
| if (URLUtil.isValidUrl(content)) { | ||
| content = """<img alt="" src="""" + content + """" width="""" + imageSize + """px"/>""" | ||
| } | ||
| htmlTable += "<td>$content</td>" | ||
|
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| column++ | ||
| } | ||
| htmlTable += """</tr>""" | ||
| } | ||
|
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| htmlTable += "</table>" | ||
| htmlTable += "<p></p>" | ||
| // Add additional spacing between tables | ||
| if (tableNumber < numberOfTables - 1) { | ||
| htmlTable += """<br style="line-height: 10px">""" | ||
| } | ||
| } | ||
|
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| return htmlTable | ||
| } | ||
|
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| fun buildHtmlPageWithLoadingMessage() : String { | ||
| val loadingMessageHtml = "<p>" + getString(R.string.menu_knmi_text_loading) + "</p>" + """<br style="line-height: 10px">""" | ||
| return getHtmlPageWithContent(loadingMessageHtml) | ||
| } | ||
|
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||
| fun buildHtmPageWithLoadingError() : String { | ||
| val errorMessageHtml = "<p>" + getString(R.string.menu_knmi_text_failed) + "</p>" + """<br style="line-height: 10px">""" | ||
| return getHtmlPageWithContent(errorMessageHtml) | ||
| } | ||
|
|
||
| private fun getHtmlPageWithContent(content: String) : String { | ||
| val webView = binding.webView | ||
| val sharedPreferences = PreferenceManager.getDefaultSharedPreferences(webView.context) | ||
| val darkMode = sharedPreferences.getString("dark_mode", "dark_mode_no") | ||
| var backgroundColor = "rgb(250, 250, 250)" | ||
| var textColor = "black" | ||
| if (darkMode == "dark_mode_yes") { | ||
| backgroundColor = "rgb(48, 48, 48)" // Android dark mode color | ||
| textColor = "rgb(193, 193, 193)" // Android dark mode color | ||
| } | ||
|
|
||
| return """<html> | ||
| <head> | ||
| <style type='text/css'> | ||
| body { | ||
| font-size: """.trimIndent() + fontSize + """px; | ||
| color:""".trimIndent() + textColor + """; | ||
| background-color:""".trimIndent() + backgroundColor + """; | ||
| } | ||
| tr { | ||
| font-size: """.trimIndent() + fontSize + """px; | ||
| } | ||
| tr:nth-child(1) { | ||
| font-weight: bold; | ||
| color:""".trimIndent() + textColor + """; | ||
| } | ||
| tr:nth-child(2n) { | ||
| color: grey; | ||
| } | ||
| tr:nth-child(2n+3) { | ||
| height: """.trimIndent() + paddedRowHeight + """px; | ||
| vertical-align: text-top; | ||
| color:""".trimIndent() + textColor + """; | ||
| } | ||
| </style> | ||
| </head> | ||
| <body>""" + content + """ | ||
| <p>""".trimIndent() + getString(R.string.menu_knmi_text_source) + """</p> | ||
| </body>""".trimIndent() | ||
| } | ||
| } | ||
| } |
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