DEV-1761: New rules API (#118)

* DEV-1761: Clean up Ruleset interface (#115)

* remove legacy ruleset types and simplify ruleset interface

* remove unnecessary settings argument from Ruleset interface

* decouple rules.Settings from client API and store settings as strings

* DEV 1761: Add new BoardState and Point fields (#117)

* add Point.TTL, Point.Value, GameState and PointState to BoardState

* allow maps to access BoardState.GameState,PointState

* add PreUpdateBoard and refactor snail_mode with it

* fix bug where an extra turn was printed to the console

* fix formatting

* fix lint errors

Co-authored-by: JonathanArns <jonathan.arns@googlemail.com>

settings_test.go

@@ -0,0 +1,31 @@
+package rules_test
+
+import (
+	"testing"
+
+	"github.com/BattlesnakeOfficial/rules"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestSettings(t *testing.T) {
+	params := map[string]string{
+		"invalidSetting": "abcd",
+		"intSetting":     "1234",
+		"boolSetting":    "true",
+	}
+
+	settings := rules.NewSettings(params)
+
+	assert.Equal(t, 4567, settings.Int("missingIntSetting", 4567))
+	assert.Equal(t, 4567, settings.Int("invalidSetting", 4567))
+	assert.Equal(t, 1234, settings.Int("intSetting", 4567))
+
+	assert.Equal(t, false, settings.Bool("missingBoolSetting", false))
+	assert.Equal(t, true, settings.Bool("missingBoolSetting", true))
+	assert.Equal(t, false, settings.Bool("invalidSetting", true))
+	assert.Equal(t, true, settings.Bool("boolSetting", true))
+
+	assert.Equal(t, 4567, rules.NewSettingsWithParams("newIntSetting").Int("newIntSetting", 4567))
+	assert.Equal(t, 1234, rules.NewSettingsWithParams("newIntSetting", "1234").Int("newIntSetting", 4567))
+	assert.Equal(t, 4567, rules.NewSettingsWithParams("x", "y", "newIntSetting").Int("newIntSetting", 4567))
+}