Add shikaku (fix #5)

shikaku.go

@@ -0,0 +1,76 @@
+package moulshowcase
+
+import (
+	"math/rand"
+	"net/url"
+	"strings"
+
+	"github.com/gorilla/schema"
+	"github.com/moul/shikaku"
+)
+
+func init() {
+	RegisterAction("shikaku", ShikakuAction)
+}
+
+func ShikakuAction(qs string) (*ActionResponse, error) {
+	// Define arguments
+	var opts struct {
+		Width  int `schema:"width"`
+		Height int `schema:"height"`
+		Blocks int `schema:"blocks"`
+
+		DrawMap         bool  `schema:"draw-map"`
+		DrawSolution    bool  `schema:"draw-solution"`
+		NoMachineOutput bool  `schema:"no-machine-output"`
+		Srand           int64 `schema:"srand"`
+	}
+	// FIXME: handle --help
+
+	// Set defaults
+	opts.Width = 8
+	opts.Height = 8
+	opts.Blocks = 10
+	opts.DrawMap = true
+	opts.DrawSolution = true
+	opts.NoMachineOutput = false
+	opts.Srand = 0
+
+	// Parse query
+	m, err := url.ParseQuery(qs)
+	if err != nil {
+		return nil, err
+	}
+	if len(m) > 0 {
+		// FIXME: if in web mode -> redirect to have options demo in the URL
+		decoder := schema.NewDecoder()
+		if err := decoder.Decode(&opts, m); err != nil {
+			return nil, err
+		}
+	}
+
+	// FIXME: validate input (max size etc)
+
+	// Create shikaku
+	if opts.Srand > 0 {
+		rand.Seed(opts.Srand)
+	}
+
+	shikakuMap := shikaku.NewShikakuMap(opts.Width, opts.Height, 0, 0)
+	if err := shikakuMap.GenerateBlocks(opts.Blocks); err != nil {
+		return nil, err
+	}
+
+	outputs := []string{}
+	if !opts.NoMachineOutput {
+		outputs = append(outputs, shikakuMap.String())
+	}
+	if opts.DrawMap {
+		outputs = append(outputs, shikakuMap.DrawMap())
+	}
+	if opts.DrawSolution {
+		outputs = append(outputs, shikakuMap.DrawSolution())
+	}
+
+	return PlainResponse(strings.Join(outputs, "\n\n")), nil
+}