got watch areas working with current frames being copied to directories

stream.go

@@ -34,18 +34,32 @@ func NewStream(URL string) Stream {
 		Interval: 5000,
 		Watches:  make([]Watch, 0),
 	}
-	watch := Watch{
-		Name:  "test",
-		Color: color.RGBA{255, 0, 255, 255},
-		Areas: []image.Rectangle{
-			image.Rect(30, 30, 400, 200),
-			image.Rect(400, 30, 500, 200),
-			image.Rect(400, 200, 500, 500),
+	stream.Watches = append(stream.Watches,
+		Watch{
+			Name:  "test",
+			Color: color.RGBA{255, 0, 255, 255},
+			Areas: []image.Rectangle{
+				image.Rect(30, 30, 400, 200),
+				image.Rect(400, 30, 500, 200),
+				image.Rect(400, 200, 500, 500),
+			},
 		},
-	}
-	log.Println(watch)
-	stream.Watches = append(stream.Watches, watch)
-	log.Println(stream)
+		Watch{
+			Name:  "test2",
+			Color: color.RGBA{0, 255, 255, 255},
+			Areas: []image.Rectangle{
+				image.Rect(800, 30, 1000, 500),
+				image.Rect(700, 500, 1200, 700),
+			},
+		},
+		Watch{
+			Name:  "test3",
+			Color: color.RGBA{255, 255, 0, 255},
+			Areas: []image.Rectangle{
+				image.Rect(50, 400, 450, 700),
+			},
+		},
+	)
 	stream.WriteStreamJSON()
 	return stream
 }
@@ -88,26 +102,32 @@ func (s Stream) Update() {
 	gocv.CvtColor(debug, &debug, gocv.ColorGrayToBGRA)
 
 	contours := gocv.FindContours(diff, gocv.RetrievalExternal, gocv.ChainApproxSimple)
-
 	for _, watch := range s.Watches {
+		skipNextAreas := true // Still draw all area rectangles
 		for _, area := range watch.Areas {
 			gocv.Rectangle(&debug, area, watch.Color, 10)
-			for contourIndex, contour := range contours {
-				for _, point := range contour {
-
-					if point.In(area) {
-						gocv.DrawContours(&debug, contours, contourIndex, color.RGBA{50, 250, 50, 150}, 5)
-						break
-					} else {
-						//log.Println("Outside area")
-					}
-				}
+			if skipNextAreas && s.CheckWatchAreas(area, contours) {
+				go watch.CopyInstant(s.GetCurrentColorInstantPath(), s)
+				skipNextAreas = false
+				break
 			}
 		}
 	}
 	go gocv.IMWrite(s.GetDebugInstantPath(), debug)
 }
 
+// CheckWatchAreas unexported
+func (s Stream) CheckWatchAreas(area image.Rectangle, contours [][]image.Point) bool {
+	for _, contour := range contours {
+		for _, point := range contour {
+			if point.In(area) {
+				return true
+			}
+		}
+	}
+	return false
+}
+
 // UpdateInterval calls Update() every interval
 func (s Stream) UpdateInterval() {
 	for {

watch.go

@@ -3,11 +3,57 @@ package main
 import (
 	"image"
 	"image/color"
+	"io/ioutil"
+	"log"
+	"os"
+	"path/filepath"
+	"time"
 )
 
+const timeLayout = "2006-01-02_15-4-5.jpg"
+
 // Watch defines one or more areas that should be monitored for motion
 type Watch struct {
 	Name  string            `json:"name"`
 	Color color.RGBA        `json:"color"`
 	Areas []image.Rectangle `json:"areas"`
 }
+
+// WatchStoreDirExists returns filepath.Join(s.GetStreamStoreDirPath(), w.Name)
+func (w Watch) WatchStoreDirExists(s Stream) bool {
+	return FileExists(w.GetWatchStoreDir(s))
+}
+
+// GetWatchStoreDir returns filepath.Join(s.GetStreamStoreDirPath(), w.Name)
+func (w Watch) GetWatchStoreDir(s Stream) string {
+	return filepath.Join(s.GetStreamStoreDirPath(), w.Name)
+}
+
+// GetWatchStoreDirInstantPath returns filepath.Join(s.GetWatchStoreDir(), "")
+func (w Watch) GetWatchStoreDirInstantPath(s Stream) string {
+	now := time.Now()
+	return filepath.Join(w.GetWatchStoreDir(s), now.Format(timeLayout))
+}
+
+// CopyInstant makes a copy of src to GetWatchStoreDirInstantPath(s)
+func (w Watch) CopyInstant(src string, s Stream) {
+	if !FileExists(w.GetWatchStoreDir(s)) {
+		os.MkdirAll(w.GetWatchStoreDir(s), os.ModePerm)
+	}
+	dest := w.GetWatchStoreDirInstantPath(s)
+	if !FileExists(src) {
+		log.Fatal("Nothing to copy ", src)
+		return
+	}
+	if FileExists(dest) {
+		os.Remove(dest)
+	}
+	srcData, err := ioutil.ReadFile(src)
+	if err != nil {
+		log.Println(err)
+	}
+	err = ioutil.WriteFile(dest, srcData, 0644)
+	if err != nil {
+		log.Println(err)
+	}
+}