First Version of Covid-19 widget

Signed-off-by: Benny Samir Hierl <bennysamir@posteo.de>

Covid-19/Covid-19.js

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+// Variables used by Scriptable.
+// These must be at the very top of the file. Do not edit.
+// icon-color: blue; icon-glyph: microscope;
+// How many minutes should the cache be valid
+let cacheMinutes = 60 * 2;
+
+////////////////////////////////////////////////////////////////////////////////
+let backColor; //Widget background color
+let backColor2; //Widget background color
+let textColor; //Widget text color
+let textWarningColor; //Widget warning text color
+
+var today = new Date();
+
+// Set up the file manager.
+const files = FileManager.local()
+
+const path = files.joinPath(files.documentsDirectory(), "widget-covid")
+
+const cacheExists = files.fileExists(path)
+const cacheDate = cacheExists ? files.modificationDate(path) : 0
+
+
+async function fetchCovidData() {
+  let csv;
+  if (cacheExists && (today.getTime() - cacheDate.getTime()) < (cacheMinutes * 60 * 1000)) {
+    console.log("Get Covid Data from Cache")
+    csv = files.readString(path)
+  } else {
+    console.log("Get Covid Data")
+    let req = new Request('https://raw.githubusercontent.com/opendataddorf/od-resources/master/COVID_Duesseldorf.csv');
+    csv = await req.loadString();
+    files.writeString(path, csv) 
+  }
+
+  return csv.trim().split("\r\n").map(function(row){return row.split(",");});
+}
+
+async function getCovidSevenDayIndex() {
+  let data = await fetchCovidData();
+  let diff = data[data.length - 1][4] - data[data.length - 8][4];
+  let diffBefore = data[data.length - 2][4] - data[data.length - 9][4];
+  let idx = diff / 646000 * 100000;
+  let idxBefore = diffBefore / 646000 * 100000;
+  return {index: idx.toFixed(0), indexBefore: idxBefore.toFixed(0), growing: (idx > idxBefore ? true : false), date: (data[data.length - 1][0]).replace('2020', '')};
+}
+
+let covidIndex = await getCovidSevenDayIndex()
+console.log(covidIndex)
+
+
+if (Device.isUsingDarkAppearance()) {
+  backColor = '111111';
+  backColor2 = '222222';
+  textColor = 'EDEDED';
+  textWarningColor = 'CB4335';
+} else {
+  backColor = '1A5276';
+  backColor2 = '1F618D';
+  textColor = 'EDEDED';
+  textWarningColor = 'CB4335';
+}
+
+// Create Widget
+let widget = new ListWidget();
+
+widget.setPadding(10, 10, 10, 10)
+
+const gradient = new LinearGradient()
+gradient.locations = [0, 1]
+gradient.colors = [
+  new Color(backColor),
+  new Color(backColor2)
+]
+widget.backgroundGradient = gradient
+
+
+let provider = widget.addText("🦠 7-Tage-Inzidenz")
+provider.font = Font.mediumSystemFont(12)
+provider.textColor = new Color(textColor)
+
+widget.addSpacer()
+
+
+  
+let covidText = widget.addText(`${(covidIndex.growing ? "⬈" : "⬊")} ${+covidIndex.index}`)
+covidText.font = Font.regularSystemFont(50)
+covidText.textColor = covidIndex.index < 50 ? new Color(textColor) : (new Color(textWarningColor));
+covidText.centerAlignText()
+
+widget.addSpacer()
+
+let dateText = widget.addText(`Stand: ${covidIndex.date}`)
+dateText.font = Font.mediumSystemFont(12)
+dateText.textColor = new Color(textColor)
+
+
+if(!config.runsInWidget) {
+  await widget.presentSmall()
+} else {
+  // Tell the system to show the widget.
+  Script.setWidget(widget)
+  Script.complete()
+}