From 62ede9414344b2315f16079b686d58eef2aa90a2 Mon Sep 17 00:00:00 2001
From: cuigh <noname@live.com>
Date: Wed, 22 Nov 2017 11:38:24 +0800
Subject: [PATCH] Use predefined time zones

---
 controller/setting.go          |  9 ++++++++-
 misc/misc.go                   | 32 ++++++++++++++++++++++++++++++++
 views/system/setting/index.jet | 12 ++++++++----
 3 files changed, 48 insertions(+), 5 deletions(-)

diff --git a/controller/setting.go b/controller/setting.go
index c9a8e37..e73667f 100644
--- a/controller/setting.go
+++ b/controller/setting.go
@@ -3,6 +3,7 @@ package controller
 import (
 	"github.com/cuigh/auxo/net/web"
 	"github.com/cuigh/swirl/biz"
+	"github.com/cuigh/swirl/misc"
 	"github.com/cuigh/swirl/model"
 )
 
@@ -26,7 +27,7 @@ func settingIndex(ctx web.Context) error {
 		return err
 	}
 
-	m := newModel(ctx).Set("Setting", setting)
+	m := newModel(ctx).Set("Setting", setting).Set("TimeZones", misc.TimeZones)
 	return ctx.Render("system/setting/index", m)
 }
 
@@ -34,6 +35,12 @@ func settingUpdate(ctx web.Context) error {
 	setting := &model.Setting{}
 	err := ctx.Bind(setting)
 	if err == nil {
+		for _, tz := range misc.TimeZones {
+			if tz.Name == setting.TimeZone.Name {
+				setting.TimeZone.Offset = tz.Offset
+				break
+			}
+		}
 		err = biz.Setting.Update(setting, ctx.User())
 	}
 	return ajaxResult(ctx, err)
diff --git a/misc/misc.go b/misc/misc.go
index a3fec2c..cc5bc4a 100644
--- a/misc/misc.go
+++ b/misc/misc.go
@@ -13,6 +13,38 @@ const (
 	envDBAddress      = "DB_ADDRESS"
 )
 
+// TimeZones holds some commonly used time-zones.
+var TimeZones = []struct {
+	Name   string
+	Offset int32 // seconds east of UTC
+}{
+	{"GMT", 0},
+	{"GMT+12", 12 * 60 * 60},
+	{"GMT+11", 11 * 60 * 60},
+	{"GMT+10", 10 * 60 * 60},
+	{"GMT+9", 9 * 60 * 60},
+	{"GMT+8(Asia/Shanghai)", 8 * 60 * 60},
+	{"GMT+7", 7 * 60 * 60},
+	{"GMT+6", 6 * 60 * 60},
+	{"GMT+5", 5 * 60 * 60},
+	{"GMT+4", 4 * 60 * 60},
+	{"GMT+3", 3 * 60 * 60},
+	{"GMT+2", 2 * 60 * 60},
+	{"GMT+1", 1 * 60 * 60},
+	{"GMT-1", -1 * 60 * 60},
+	{"GMT-2", -2 * 60 * 60},
+	{"GMT-3", -3 * 60 * 60},
+	{"GMT-4", -4 * 60 * 60},
+	{"GMT-5", -5 * 60 * 60},
+	{"GMT-6", -6 * 60 * 60},
+	{"GMT-7", -7 * 60 * 60},
+	{"GMT-8", -8 * 60 * 60},
+	{"GMT-9", -9 * 60 * 60},
+	{"GMT-10", -10 * 60 * 60},
+	{"GMT-11", -11 * 60 * 60},
+	{"GMT-12", -12 * 60 * 60},
+}
+
 var Options = &struct {
 	DockerEndpoint string
 	DBType         string
diff --git a/views/system/setting/index.jet b/views/system/setting/index.jet
index 59a0ad0..abc39fd 100644
--- a/views/system/setting/index.jet
+++ b/views/system/setting/index.jet
@@ -48,14 +48,18 @@
           <div class="field-body">
             <div class="field has-addons">
               <div class="control has-icons-left">
-                <input name="tz.name" value="{{ .Setting.TimeZone.Name }}" class="input" type="text" placeholder="Location name">
+                <div class="select">
+                  <select name="tz.name">
+                    {{ offset := .Setting.TimeZone.Offset }}
+                    {{ range .TimeZones }}
+                    <option value="{{ .Name }}"{{ if offset == .Offset }} selected{{ end }}>{{ .Name }}</option>
+                    {{ end }}
+                  </select>
+                </div>
                 <div class="icon is-left">
                   <i class="fa fa-globe"></i>
                 </div>
               </div>
-              <div class="control">
-                <input name="tz.offset" value="{{ .Setting.TimeZone.Offset }}" class="input" type="text" placeholder="Offset in seconds" data-type="integer">
-              </div>
             </div>
           </div>
         </div>