def palette():
"""GET requests are returned a palette in JSON
POST expects to receive a JSON palette, which is then
used to generate a sample image with the palette and return
a cache-busting path to the image."""
if request.method == "GET": # if initial request, GET
# create palettes, images
return json.dumps(
{
"nwsPalette": nws_palette("rgb"),
"newPalette": new_palette("hsla"),
"baseImageSrc": "static/images/test-radar2.gif",
"newImageSrc": "static/images/new-radar.gif",
}
)
elif request.method == "POST":
data = request.get_json(force=True)
hsla_palette = data
rgb_palette = hsla_to_rgb(hsla_palette)
image_src = make_sample_image(rgb_palette)
new_image_src = "%s?%d" % (image_src, int(time.time()))
return json.dumps({"newImageSrc": new_image_src})
else:
# TODO: return something better
return "Shit!"
def index():
"""Main view, the only view serving HTML"""
old_gif = "static/images/test-radar2.gif"
new_gif = "static/images/new-radar.gif"
image = Image.open(old_gif)
new_im = change_palette(image, nws_palette("rgb"), new_palette("rgb"))
new_im.save(new_gif, "GIF", transparency=0)
return render_template(
"index.html", old_gif=old_gif, new_gif=new_gif, old_palette=nws_palette("rgb"), new_palette=new_palette("hsla")
)