#!/usr/bin/env plcsh
 
import Image, ImageDraw

def circle (image, percentX, percentY, radiusX, radiusY, colorIn, colorOut):

    imageX, imageY = image.size
    centerX = int(imageX*percentX)
    centerY = int(imageY*percentY)
    x = max (0, min (centerX,imageX))
    y = max (0, min (centerY,imageY))

    x1 = x - radiusX
    x2 = x + radiusX
    y1 = y - radiusY
    y2 = y + radiusY

    draw = ImageDraw.Draw (image)
    draw.chord((x1,y1,x2,y2), 0, 360, fill=colorIn, outline=colorOut )
    del draw

def main ():

    path = '/var/www/html/'
    original = path + 'map.png'
    live = path + 'livemap.png'

    # map characteristics, in degrees.
    # latitude : positive is north
    # longitude : positive is east 
    latitude={'top':65.,
              'bottom': 35.5}
    longitude={'left':-11.,
               'right':58.}
    
    # circle radius in pixels
    sx,sy=6,6
    # circle in and out colors
    cIn,cOut='#566b8a','#bbbbbb'
 
    image = Image.open(original)

    for site in GetSites():
        if site['longitude'] is not None and site['latitude'] is not None:
            px=float(longitude['left']-site['longitude'])/float(longitude['left']-longitude['right'])
            py=float(latitude['top']-site['latitude'])/float(latitude['top']-latitude['bottom'])
            circle(image,px,py,sx,sy,cIn,cOut)

    image.save (live)

if __name__ == '__main__':
    main ()