Don't rely exclusively on /etc/timezone

api/alarms.go

@@ -13,7 +13,7 @@ import (
 
 func declareAlarmsRoutes(cfg *config.Config, db *reveil.LevelDBStorage, resetTimer func(), router *gin.RouterGroup) {
 	router.GET("/alarms/next", func(c *gin.Context) {
-		alarm, err := reveil.GetNextAlarm(db)
+		alarm, err := reveil.GetNextAlarm(cfg, db)
 		if err != nil {
 			c.AbortWithStatusJSON(http.StatusInternalServerError, gin.H{"errmsg": err.Error()})
 			return
@@ -200,8 +200,8 @@ func declareAlarmsRoutes(cfg *config.Config, db *reveil.LevelDBStorage, resetTim
 
 	repeatedAlarmsRoutes.GET("", func(c *gin.Context) {
 		alarm := c.MustGet("alarm").(*reveil.AlarmRepeated)
-		alarm.FillExcepts(db)
+		alarm.FillExcepts(cfg, db)
-		alarm.NextTime = alarm.GetNextOccurence(db)
+		alarm.NextTime = alarm.GetNextOccurence(cfg, db)
 
 		c.JSON(http.StatusOK, alarm)
 	})

app.go

@@ -64,6 +64,7 @@ func (app *App) Start() {
 		Handler: app.router,
 	}
 
+	log.Println("Current timezone:", app.cfg.Timezone.String())
 	app.ResetTimer()
 
 	log.Printf("Ready, listening on %s\n", app.cfg.Bind)
@@ -78,7 +79,7 @@ func (app *App) ResetTimer() {
 		app.nextAlarm = nil
 	}
 
-	if na, err := reveil.GetNextAlarm(app.db); err == nil && na != nil {
+	if na, err := reveil.GetNextAlarm(app.cfg, app.db); err == nil && na != nil {
 		app.nextAlarm = time.AfterFunc(time.Until(*na), func() {
 			app.nextAlarm = nil
 			reveil.RemoveOldAlarmsSingle(app.db)

config/cli.go

@@ -17,6 +17,7 @@ func (c *Config) declareFlags() {
 	flag.StringVar(&c.ActionsDir, "actions-dir", c.ActionsDir, "Path to the directory containing the actions")
 	flag.StringVar(&c.RoutinesDir, "routines-dir", c.RoutinesDir, "Path to the directory containing the routines")
 	flag.IntVar(&c.SampleRate, "samplerate", c.SampleRate, "Samplerate for unifying output stream")
+	flag.Var(&c.Timezone, "timezone", "Timezone to use when dealing with times")
 
 	// Others flags are declared in some other files when they need specials configurations
 }

config/config.go

@@ -18,6 +18,7 @@ type Config struct {
 	ActionsDir   string
 	RoutinesDir  string
 
+	Timezone   Timezone
 	SampleRate int
 }
 

config/custom.go

@@ -3,6 +3,7 @@ package config
 import (
 	"encoding/base64"
 	"net/url"
+	"time"
 )
 
 type JWTSecretKey []byte
@@ -42,3 +43,33 @@ func (i *URL) Set(value string) error {
 	i.URL = u
 	return nil
 }
+
+type Timezone struct {
+	tz *time.Location
+}
+
+func (tz *Timezone) GetLocation() *time.Location {
+	if tz.tz != nil {
+		return tz.tz
+	} else {
+		return time.Local
+	}
+}
+
+func (tz *Timezone) String() string {
+	if tz.tz != nil {
+		return tz.tz.String()
+	} else {
+		return time.Local.String()
+	}
+}
+
+func (tz *Timezone) Set(value string) error {
+	newtz, err := time.LoadLocation(value)
+	if err != nil {
+		return err
+	}
+
+	tz.tz = newtz
+	return nil
+}

model/alarm.go

@@ -4,6 +4,8 @@ import (
 	"fmt"
 	"sort"
 	"time"
+
+	"git.nemunai.re/nemunaire/reveil/config"
 )
 
 type Date time.Time
@@ -38,7 +40,7 @@ func (h *Hour) UnmarshalJSON(src []byte) error {
 	return nil
 }
 
-func GetNextAlarm(db *LevelDBStorage) (*time.Time, error) {
+func GetNextAlarm(cfg *config.Config, db *LevelDBStorage) (*time.Time, error) {
 	alarmsRepeated, err := GetAlarmsRepeated(db)
 	if err != nil {
 		return nil, err
@@ -46,7 +48,7 @@ func GetNextAlarm(db *LevelDBStorage) (*time.Time, error) {
 
 	var closestAlarm *time.Time
 	for _, alarm := range alarmsRepeated {
-		next := alarm.GetNextOccurence(db)
+		next := alarm.GetNextOccurence(cfg, db)
 		if next != nil && (closestAlarm == nil || closestAlarm.After(*next)) {
 			closestAlarm = next
 		}
@@ -92,7 +94,7 @@ type AlarmRepeated struct {
 	NextTime          *time.Time   `json:"next_time,omitempty"`
 }
 
-func (a *AlarmRepeated) FillExcepts(db *LevelDBStorage) error {
+func (a *AlarmRepeated) FillExcepts(cfg *config.Config, db *LevelDBStorage) error {
 	if a.IgnoreExceptions {
 		return nil
 	}
@@ -112,7 +114,7 @@ func (a *AlarmRepeated) FillExcepts(db *LevelDBStorage) error {
 		end := time.Time(*exception.End).AddDate(0, 0, 1)
 		for t := time.Time(*exception.Start); end.After(t); t = t.AddDate(0, 0, 1) {
 			if t.Weekday() == a.Weekday {
-				a.Excepts = append(a.Excepts, time.Date(t.Year(), t.Month(), t.Day(), time.Time(*a.StartTime).Hour(), time.Time(*a.StartTime).Minute(), time.Time(*a.StartTime).Second(), 0, now.Location()))
+				a.Excepts = append(a.Excepts, time.Date(t.Year(), t.Month(), t.Day(), time.Time(*a.StartTime).Hour(), time.Time(*a.StartTime).Minute(), time.Time(*a.StartTime).Second(), 0, cfg.Timezone.GetLocation()))
 				t.AddDate(0, 0, 6)
 			}
 		}
@@ -123,14 +125,14 @@ func (a *AlarmRepeated) FillExcepts(db *LevelDBStorage) error {
 	return nil
 }
 
-func (a *AlarmRepeated) GetNextOccurence(db *LevelDBStorage) *time.Time {
+func (a *AlarmRepeated) GetNextOccurence(cfg *config.Config, db *LevelDBStorage) *time.Time {
 	if len(a.Excepts) == 0 {
-		a.FillExcepts(db)
+		a.FillExcepts(cfg, db)
 	}
 
 	now := time.Now()
 
-	today := time.Date(now.Year(), now.Month(), now.Day(), time.Time(*a.StartTime).Hour(), time.Time(*a.StartTime).Minute(), time.Time(*a.StartTime).Second(), 0, now.Location())
+	today := time.Date(now.Year(), now.Month(), now.Day(), time.Time(*a.StartTime).Hour(), time.Time(*a.StartTime).Minute(), time.Time(*a.StartTime).Second(), 0, cfg.Timezone.GetLocation())
 	if now.After(today) {
 		today = today.AddDate(0, 0, 1)
 	}