Add background color support

README.md

@@ -18,11 +18,24 @@ For example, I personally think it would really spiff up a [personal website](ht
 
 # Color Schemes
 
-We also support custom color schemes! You can provide any base color and we will make shades for the chart. Just visit `https://ghchart.rshah.org/<HEX-COLOR>/2016rshah` and replace `<HEX-COLOR>` with your hex color code, not including the leading hashtag. For example if you want a blue-themed chart that is based around the hex color `#409ba5`, you can visit the following route:
+We also support custom color schemes! You can provide any base color and we will make shades for the chart. 
+
+```
+https://ghchart.rshah.org/<BASE-COLOR>/2016rshah 
+```
+Replace ```BASE-COLOR``` with a hex string eg: ```ff0000```
+
+```
+https://ghchart.rshah.org/<BASE-COLOR>/<BG-COLOR>/2016rshah
+```
+Replace ```BASE-COLOR``` & ```BG-COLOR``` with a hex string eg: ```ff0000```
+
+
+<img src="https://ghchart.rshah.org/409ba5/2016rshah" alt="2016rshah's Github chart" />
+
+<img src="https://ghchart.rshah.org/409ba5/222222/2016rshah" alt="2016rshah's Github chart" />
 
- <img src="https://ghchart.rshah.org/409ba5/2016rshah" alt="2016rshah's Blue Github Chart" />
 
-![2016rshah's Blue Github Chart](https://ghchart.rshah.org/409ba5/2016rshah)
 
 
 # Contributing

app.rb

@@ -24,7 +24,9 @@
  end
 end
 
+
 get '/:base/:username' do
+ # Custom color scheme, with default background
  headers 'Cache-Control' => "max-age=#{60*60*24}"
  headers 'Content-Type' => "image/svg+xml"
 
@@ -44,3 +46,27 @@
  out << svg
  end
 end
+
+
+get '/:base/:background/:username' do
+ # Custom color scheme, with custom background
+ headers 'Cache-Control' => "max-age=#{60*60*24}"
+ headers 'Content-Type' => "image/svg+xml"
+
+ username = params[:username].chomp('.svg')
+
+ #Makes API backwards compatible
+ if(params[:base] == "teal" || params[:base] == "halloween" || params[:base] == "default")
+ scheme = COLOR_SCHEMES[params[:base].to_sym]
+ else
+ #this case will be executed a majority of the time
+ base_color = '#'+params[:base]
+ background_color = '#'+params[:background]
+ scheme = [background_color, lighten_color(base_color, 0.3), lighten_color(base_color, 0.2), base_color, darken_color(base_color, 0.8)]
+ end
+
+ svg = GithubChart.new(user: username, colors: scheme).render('svg')
+ stream do |out|
+ out << svg
+ end
+end