Add GPS related disable for buttons

mobile/src/util.js

@@ -55,3 +55,36 @@ export const pad = (num, size) => {
   while (s.length < size) s = "0" + s
   return s
 }
+
+export const regionContainingPoints = (points, inset) => {
+  let minX, maxX, minY, maxY
+
+  // init first point
+  ;((point) => {
+    minX = point.latitude
+    maxX = point.latitude
+    minY = point.longitude
+    maxY = point.longitude
+  })(points[0])
+
+  // calculate rect
+  points.map((point) => {
+    minX = Math.min(minX, point.latitude)
+    maxX = Math.max(maxX, point.latitude)
+    minY = Math.min(minY, point.longitude)
+    maxY = Math.max(maxY, point.longitude)
+  })
+
+  const midX = (minX + maxX) / 2
+  const midY = (minY + maxY) / 2
+  const midPoint = [midX, midY]
+  const deltaX = maxX - minX + inset
+  const deltaY = maxY - minY + inset
+
+  return {
+    latitude: midX,
+    longitude: midY,
+    latitudeDelta: deltaX,
+    longitudeDelta: deltaY,
+  }
+}