海外のタイムゾーンにいても、東京の雨模様が見れる！

cli/amesh.go

@@ -3,15 +3,20 @@ package cli
 import (
 	"fmt"
 	"os"
-	"time"
 
 	"github.com/otiai10/amesh/lib/amesh"
 	"github.com/otiai10/gat/render"
 )
 
 // Amesh デフォルトのアメッシュを表示
 func Amesh(r render.Renderer, geo, mask bool) error {
-	entry := amesh.GetEntry(time.Now())
+
+	now, err := getNow()
+	if err != nil {
+		return err
+	}
+
+	entry := amesh.GetEntry(now)
 	merged, err := entry.Image(geo, mask)
 	if err != nil {
 		return err

cli/now.go

@@ -0,0 +1,16 @@
+package cli
+
+import "time"
+
+const defaultLocation = "Asia/Tokyo"
+
+// FIXME: ameshは東京のやつなのでとりあえずAsia/Tokyoだけにします。
+// ゆうて日本国内なら同じtimezoneなのであんまり問題無いと思うけど、
+// 今後世界都市対応するなら、これは問題になりますね。
+func getNow() (time.Time, error) {
+	location, err := time.LoadLocation(defaultLocation)
+	if err != nil {
+		return time.Time{}, err
+	}
+	return time.Now().In(location), nil
+}

cli/timelapse.go

@@ -51,9 +51,14 @@ func Timelapse(r render.Renderer, minutes, delay int, loop bool) error {
 
 func getSnapshots(dur time.Duration) (snapshots []snapshot, err error) {
 
+	now, err := getNow()
+	if err != nil {
+		return nil, err
+	}
+
 	sheets := int((int64(dur) / int64(5*time.Minute))) + 1
 	for i := 0; i < sheets; i++ {
-		t := time.Now().Add(time.Duration(-5*(sheets-i)) * time.Minute)
+		t := now.Add(time.Duration(-5*(sheets-i)) * time.Minute)
 		entry := amesh.GetEntry(t)
 		img, err := entry.Image(true, true)
 		if err != nil {

lib/amesh/entry.go

@@ -65,18 +65,6 @@ func getMesh(t time.Time) string {
 	return AmeshURL + t.Format(mesh)
 }
 
-// // YAGNI!!
-// func now(loc *time.Location) time.Time {
-// 	if loc != nil {
-// 		return time.Now().In(loc)
-// 	}
-// 	loc, err := time.LoadLocation(defaultLocation)
-// 	if err != nil {
-// 		return time.Now()
-// 	}
-// 	return time.Now().In(loc)
-// }
-
 // Image fetches image data from URL and merge them if needed.
 func (entry Entry) Image(geo, mask bool, client ...*http.Client) (*image.RGBA, error) {