draw data adjust

goCharts/draw.go

@@ -10,48 +10,25 @@ package goCharts
 
 import (
 	"github.com/vicanso/go-charts/v2"
+	"math/rand"
+	"time"
 )
 
+func getRand(len int) []float64 {
+	var res []float64
+	for i := 0; i < len; i++ {
+		randFloat := float64(rand.Intn(1000))
+		res = append(res, randFloat)
+	}
+	return res
+}
+
 func Draw() {
 	values := [][]float64{
-		{
-			120,
-			132,
-			101,
-			// 134,
-			//charts.GetNullValue(),
-			134,
-			90,
-			230,
-			210,
-		},
-		{
-			220,
-			182,
-			191,
-			234,
-			290,
-			330,
-			310,
-		},
-		{
-			150,
-			232,
-			201,
-			154,
-			190,
-			330,
-			410,
-		},
-		{
-			320,
-			332,
-			301,
-			334,
-			390,
-			330,
-			320,
-		},
+		getRand(7),
+		getRand(7),
+		getRand(7),
+		getRand(7),
 	}
 	p, err := charts.LineRender(
 		values,
@@ -60,15 +37,7 @@ func Draw() {
 		charts.WidthOptionFunc(720),
 		charts.HeightOptionFunc(1280),
 		charts.TitleTextOptionFunc("symbol price"),
-		charts.XAxisDataOptionFunc([]string{
-			"Mon",
-			"Tue",
-			"Wed",
-			"Thu",
-			"Fri",
-			"Sat",
-			"Sun",
-		}),
+		charts.XAxisDataOptionFunc(getLastDays()),
 		charts.LegendLabelsOptionFunc([]string{
 			"BTC",
 			"ETH",
@@ -98,3 +67,19 @@ func Draw() {
 		panic(err)
 	}
 }
+
+func getLastDays() []string {
+	now := time.Now()
+	getDay := func(t time.Time, dif int) string {
+		return t.AddDate(0, 0, dif).Format("01/02")
+	}
+	return []string{
+		getDay(now, -6),
+		getDay(now, -5),
+		getDay(now, -4),
+		getDay(now, -3),
+		getDay(now, -2),
+		getDay(now, -1),
+		getDay(now, 0),
+	}
+}

goCharts/draw_test.go

@@ -1,6 +1,9 @@
 package goCharts
 
-import "testing"
+import (
+	"fmt"
+	"testing"
+)
 
 /*
 *
@@ -12,3 +15,8 @@ import "testing"
 func TestDraw(t *testing.T) {
 	Draw()
 }
+
+func TestGetrand(t *testing.T) {
+	fmt.Println(getRand(7))
+
+}