Working auth and photo json endpoint

Signed-off-by: Kris Nóva <kris@nivenly.com>

vendor/gopkg.in/ugjka/go-tz.v2/tz/raycast.go

@@ -0,0 +1,79 @@
+package tz
+
+import (
+	"math"
+)
+
+type polygon []Point
+
+func newPoint(lon, lat *float64) *Point {
+	return &Point{*lon, *lat}
+}
+
+func (p polygon) centroid() Point {
+	x := 0.0
+	y := 0.0
+	numPoints := float64(len(p))
+	for _, p := range p {
+		x += p.Lon
+		y += p.Lat
+	}
+	return Point{x / numPoints, y / numPoints}
+}
+
+func (p polygon) isClosed() bool {
+	if len(p) < 3 {
+		return false
+	}
+
+	return true
+}
+
+// Returns whether or not the current Polygon contains the passed in Point.
+func (p polygon) contains(point *Point) bool {
+	if !p.isClosed() {
+		return false
+	}
+
+	start := len(p) - 1
+	end := 0
+
+	contains := intersectsWithRaycast(point, &p[start], &p[end])
+
+	for i := 1; i < len(p); i++ {
+		if intersectsWithRaycast(point, &p[i-1], &p[i]) {
+			contains = !contains
+		}
+	}
+
+	return contains
+}
+
+// https://rosettacode.org/wiki/Ray-casting_algorithm#Go
+func intersectsWithRaycast(point, start, end *Point) bool {
+	if start.Lat > end.Lat {
+		start, end = end, start
+	}
+	for point.Lat == start.Lat || point.Lat == end.Lat {
+		point.Lat = math.Nextafter(point.Lat, math.Inf(1))
+	}
+	if point.Lat < start.Lat || point.Lat > end.Lat {
+		return false
+	}
+	if start.Lon > end.Lon {
+		if point.Lon > start.Lon {
+			return false
+		}
+		if point.Lon < end.Lon {
+			return true
+		}
+	} else {
+		if point.Lon > end.Lon {
+			return false
+		}
+		if point.Lon < start.Lon {
+			return true
+		}
+	}
+	return (point.Lat-start.Lat)/(point.Lon-start.Lon) >= (end.Lat-start.Lat)/(end.Lon-start.Lon)
+}