seperate handler for events.

sample_data/samplemenu.json

+{
+    "button": [
+        {
+            "name": "会员信息",
+            "sub_button": [
+                {
+                    "type": "click",
+                    "name": "我的会员资料",
+                    "key": "MEMBER_MYPROFILE"
+                },
+                {
+                    "type": "click",
+                    "name": "积分和账单",
+                    "key": "MEMBER_CREDITS"
+                },
+                {
+                    "type": "click",
+                    "name": "搜索其他会员信息",
+                    "key": "MEMBER_SEARCH"
+                },
+                {
+                    "type": "click",
+                    "name": "广播给所有会员",
+                    "key": "MEMBER_BROADCAST"
+                },
+                {
+                    "type": "VIEW",
+                    "name": "校友会主页",
+                    "url": "https://www.hitxy.org.au/"
+                }
+            ]
+        },
+        {
+            "name": "组织活动",
+            "sub_button": [
+                {
+                    "type": "click",
+                    "name": "我来发起一次活动",
+                    "key": "EVENT_STARTONE"
+                },
+                {
+                    "type": "click",
+                    "name": "参与直播活动",
+                    "key": "EVENT_CONTRIBUTEPHOTO"
+                },
+                {
+                    "type": "click",
+                    "name": "签到当前活动",
+                    "key": "EVENT_CHECKIN"
+                },
+                {
+                    "type": "click",
+                    "name": "参与幸运抽奖",
+                    "key": "EVENT_LUCKYDRAW"
+                },
+                {
+                    "type": "click",
+                    "name": "即将举办的活动",
+                    "key": "EVENTS_UPCOMING"
+                }
+            ]
+        },
+        {
+            "name": "职业发展",
+            "sub_button": [
+                {
+                    "type": "click",
+                    "name": "澳洲工作机会",
+                    "key": "CAREERDEV_JOBS"
+                },
+                {
+                    "type": "click",
+                    "name": "融入澳洲社区",
+                    "key": "CARDEV_INDUSTRY"
+                },
+                {
+                    "type": "click",
+                    "name": "OutReach Program",
+                    "key": "CARDEV_OUTREACH"
+                },
+                {
+                    "type": "click",
+                    "name": "母校发展机会",
+                    "key": "CARDEV_HIT"
+                },
+                {
+                    "type": "click",
+                    "name": "全球发展机会",
+                    "key": "CARDEV_GLOBAL"
+                }
+            ]
+        }
+    ]
+}

serveCommand.go

 import (
 	"fmt"
 	"log"
+	"os"
 )
 
 func serveCommand(openID string, in InWechatMsg) (state chatState, processed bool) {
 		str = buildVideoMsg(openID, "e2iNEiSxCX5TV1WbFd0TQMn5lilY3bylh1--lDBwi7I", "航拍春日哈工大", m.MediaId)
 	case LocationMsg:
 		m := in.body.(LocationMsg)
-		str, _ = BuildTextMsg(openID, fmt.Sprintf("long=%f, lat=%f, scale=%d", m.Location_X, m.Location_Y, m.Scale))
+		mid := location2MediaID(m.Location_X, m.Location_Y)
+		//str, _ = BuildTextMsg(openID, fmt.Sprintf("long=%f, lat=%f, scale=%d", m.Location_X, m.Location_Y, m.Scale))
+		// str = buildPicMsg(openID, mid)
+		url := location2URL(m.Location_X, m.Location_Y)
+		str, _ = BuildTextMsg(openID, mid+"\r\n"+url)
+		kfSendTxt(openID, url)
+
+	case LinkMsg:
+		m := in.body.(LinkMsg)
+		kfSendTxt(openID, m.Title+m.Description)
+		str, _ = BuildTextMsg(openID, m.Url)
 	case EventMsg:
-		m := in.body.(EventMsg)
-		log.Println(m)
-		url := fmt.Sprintf("https://maps.googleapis.com/maps/api/staticmap?center=%f,%f&markers=color:red|label:S|%f,%f&zoom=12&size=414x736", m.Latitude, m.Longitude, m.Latitude, m.Longitude)
-		log.Println(url)
-		file, _, _ := saveURL(url)
-		str = buildUploadPicMsg(openID, file)
-		//str, _ = BuildTextMsg(openID, fmt.Sprintf("long=%f, lat=%f, scal =%f", m.Longitude, m.Latitude, m.Precision))
+		return echoEvents(openID, in)
 	default:
 		str, err = BuildTextMsg(openID, "text message")
 	}
 	//state is any state that
 	return
 }
+
+func echoEvents(openID string, in InWechatMsg) (state chatState, processed bool) {
+	processed = true
+	str := ""
+	m := in.body.(EventMsg)
+	log.Println("Event = " + m.Event)
+	switch m.Event {
+	case "LOCATION":
+		mid := location2MediaID(m.Latitude, m.Longitude)
+		str = buildPicMsg(openID, mid)
+	case "CLICK":
+		str, _ = BuildTextMsg(openID, m.EventKey)
+	case "subscribe":
+	case "unsubscribe":
+	case "SCAN":
+	case "VIEW":
+	default:
+		str, _ = BuildTextMsg(openID, " unknown event :"+m.Event)
+	}
+	state.response = str
+	return
+}
+
+func location2MediaID(lat, long float64) (mediaID string) {
+	url := fmt.Sprintf("https://maps.googleapis.com/maps/api/staticmap?center=%f,%f&markers=color:red|label:S|%f,%f&zoom=17&size=1280x2014", lat, long, lat, long)
+	file, _, _ := saveURL(url)
+	mediaID = uploadImage(file)
+	os.Remove(file)
+	return
+}
+
+func location2URL(lat, long float64) (url string) {
+	url = fmt.Sprintf("http://maps.google.com/maps?z=12&t=m&q=loc:%f+%f", lat, long)
+	log.Println(url)
+	return
+}