Improve attribute name handling

app/stats.go

@@ -28,17 +28,36 @@ func Count() int {
 	return *count
 }
 
-// GetAttribute returns the specified attribute for all phases since the specified date
-func GetAttribute(attr string, date time.Time) (data []Phases) {
-	m := model.Measurement()
+// Attribute represents a single attribute
+type Attribute struct {
+	Name  string
+	Index int
+}
 
-	f := reflect.ValueOf(m).Elem().FieldByName(attr + `1`)
-	if !f.IsValid() || f.Type().Name() != `Field` {
-		return nil
+// GetAttributes returns a list of all known attributes
+func GetAttributes() (list []Attribute) {
+	m := model.Measurement()
+	r := reflect.TypeOf(m).Elem()
+
+	for i := 0; i < r.NumField(); i++ {
+		f := r.Field(i)
+		if f.Name[len(f.Name)-1] == '1' {
+			list = append(list, Attribute{f.Name[:len(f.Name)-1], i})
+		}
 	}
-	f1 := f.Interface().(*qb.TableField)
-	f2 := reflect.ValueOf(m).Elem().FieldByName(attr + `2`).Interface().(*qb.TableField)
-	f3 := reflect.ValueOf(m).Elem().FieldByName(attr + `3`).Interface().(*qb.TableField)
+
+	return
+}
+
+// GetAttribute returns the specified attribute for all phases since the specified date
+func GetAttribute(index int, date time.Time) (data []Phases) {
+	m := model.Measurement()
+	r := reflect.ValueOf(m).Elem()
+
+	f1, f2, f3 :=
+		r.Field(index).Interface().(*qb.TableField),
+		r.Field(index+1).Interface().(*qb.TableField),
+		r.Field(index+2).Interface().(*qb.TableField)
 
 	q := m.Select(m.Time, f1, f2, f3).
 		OrderBy(qb.Desc(m.Time)).

server/main.go

@@ -29,7 +29,10 @@ func main() {
 	e.Use(recoverMiddleware)
 
 	e.GET(`/count`, count)
-	e.GET(`/:attr/:date`, pmax)
+
+	for _, v := range app.GetAttributes() {
+		e.GET(`/`+strings.ToLower(v.Name)+`/:date`, getAttr(v.Index))
+	}
 
 	panic(e.Start(`localhost:33333`))
 }
@@ -38,31 +41,13 @@ func count(c echo.Context) error {
 	return c.JSON(200, app.Count())
 }
 
-func pmax(c echo.Context) error {
-	attr := c.Param(`attr`)
-	if len(attr) < 2 {
-		return c.NoContent(400)
-	}
-	attr = convertAttribute(attr)
+func getAttr(index int) echo.HandlerFunc {
+	return func(c echo.Context) error {
+		date, err := time.Parse(time.RFC3339, c.Param(`date`))
+		if err != nil {
+			return c.NoContent(400)
+		}
 
-	date, err := time.Parse(time.RFC3339, c.Param(`date`))
-	if err != nil {
-		return c.NoContent(400)
+		return c.JSON(200, app.GetAttribute(index, date))
 	}
-
-	data := app.GetAttribute(attr, date)
-	if data == nil {
-		return c.NoContent(404)
-	}
-
-	return c.JSON(200, data)
-}
-
-func convertAttribute(attr string) string {
-	attr = strings.ToUpper(attr[:1]) + strings.ToLower(attr[1:])
-
-	attr = strings.Replace(attr, `gem`, `Gem`, -1)
-	attr = strings.Replace(attr, `max`, `Max`, -1)
-
-	return attr
 }

server/main_test.go

@@ -1,20 +0,0 @@
-package main
-
-import (
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-)
-
-func TestConvertAttribute(t *testing.T) {
-	var data = map[string]string{
-		`cgem`: `CGem`,
-		`ep`:   `Ep`,
-		`PMAX`: `PMax`,
-		`Test`: `Test`,
-	}
-
-	for in, expected := range data {
-		assert.Equal(t, expected, convertAttribute(in))
-	}
-}