From 3bbfbd7509a14f50b9515f627e1a5d77f010e890 Mon Sep 17 00:00:00 2001
From: Patrick Peng Sun <patrick@lawipac.com>
Date: Sat, 27 May 2017 11:47:21 +1000
Subject: [PATCH] init a procedure architecture designed & tested.

---
 chatState.go            | 63 +++++++++++++++++++++++++++++++++++++++++
 chatState_test.go       |  7 +++++
 procGetBasicUserInfo.go | 51 +++++++++++++++++++++++++++++++++
 3 files changed, 121 insertions(+)
 create mode 100644 procGetBasicUserInfo.go

diff --git a/chatState.go b/chatState.go
index e8cf904..a5fbe68 100644
--- a/chatState.go
+++ b/chatState.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"encoding/json"
+	"errors"
 	"io/ioutil"
 	"log"
 	"os"
@@ -21,6 +22,8 @@ type chatState struct {
 		Hint      string            `json:"Hint"`
 		Message   map[string]string `json:"Message"` //the description for receiving message
 	} `json:"Receive"`
+
+	Save map[string]string `json:"Save"` //the state save some data for later usage
 }
 
 //for individual state
@@ -65,3 +68,63 @@ func deleteChatState(openID, procedure string) (err error) {
 	err = os.Remove(path)
 	return
 }
+
+//ValidationResult After input validation, what is the result
+type ValidationResult struct {
+	accept  bool
+	Hint    string
+	Error   string
+	Warning string
+}
+
+//Validator function type for validating all wechat inputs
+type Validator func(s chatState) ValidationResult
+
+//start a procedure
+func startProcedure(openID, procedure string) (err error) {
+	//init procedure state
+	init := getProcedureInit(openID, procedure)
+	if init == nil {
+		msg := "FATAL: cannot initialize procedure [" + procedure + "] "
+		err = errors.New(msg)
+		return
+	}
+	//init and get initial state
+	state := init(openID)
+
+	//do the real concret work for processing the state
+	err = processProcedureState(state)
+	return
+}
+
+//resume a previous Procedure
+func resumeProcedure(procedure string) {
+
+}
+
+func stopProcedure(procedure string) {
+
+}
+
+func processProcedureState(state chatState) (err error) {
+	log.Println(state)
+	return
+}
+
+type initProcedureFunction func(openid string) (initState chatState)
+
+func getProcedureInit(openID, procedure string) initProcedureFunction {
+	initFunc := map[string]initProcedureFunction{
+		"TestDummy":        nil,
+		"TestEcho":         initTestEcho,
+		"GetBasicUserInfo": initGetBasicUserInfo,
+		"GetEmailAddr":     initGetBasicUserInfo,
+	}
+	return initFunc[procedure]
+}
+
+func initTestEcho(openid string) (r chatState) {
+	r.Name = openid
+	r.Expire = 0
+	return
+}
diff --git a/chatState_test.go b/chatState_test.go
index b8a4cf9..24d4185 100644
--- a/chatState_test.go
+++ b/chatState_test.go
@@ -40,3 +40,10 @@ func TestChatState(t *testing.T) {
 	AssertEqual(t, err, nil, "delete chatState should be good")
 
 }
+
+func TestStartProcedure(t *testing.T) {
+	s := startProcedure("id", "TestDummy")
+	AssertEqual(t, s != nil, true, "TestDummy should return error")
+	s = startProcedure("id", "TestEcho")
+	AssertEqual(t, s, nil, "TestEqual should return success")
+}
diff --git a/procGetBasicUserInfo.go b/procGetBasicUserInfo.go
new file mode 100644
index 0000000..483d97c
--- /dev/null
+++ b/procGetBasicUserInfo.go
@@ -0,0 +1,51 @@
+package main
+
+//procedure 000
+//available state
+var statesGetBasicUserInfo = map[string]chatState{
+	"Intro":           chatState{},
+	"AskName":         chatState{},
+	"AskEnglishName":  chatState{},
+	"AskEmail":        chatState{},
+	"AskMobileNumber": chatState{},
+	"AskProfilePhoto": chatState{},
+	"Done":            chatState{},
+}
+
+var validateGetBasicUserInfo = map[string]Validator{
+	"validateChineseName": validateChineseName,
+}
+
+func proc000AskName(openid string) {
+	s := chatState{}
+	s.Name = "AskName"
+	s.Expire = 300               //5 minutes
+	s.Save = map[string]string{} //clear
+	s.Send.Message["q"] = "请输入您的真实中文名，没有请填写 ”无“ "
+	s.Receive.Validator = "validateChineseName"
+}
+
+func validateChineseName(s chatState) (r ValidationResult) {
+	r.accept = true
+	r.Error = ""
+
+	input := s.Receive.Message["name"]
+	r.Hint = "通常中文名只有三个字或者四个字，比如 王更新，诸葛亮，司马相如，慕容白雪"
+	if len(input) >= 10 {
+		r.accept = false
+		r.Error = "您的名字过长"
+	}
+	if len(input) <= 1 {
+		r.accept = false
+		r.Error = "您的名字很萌，就是有点太短了"
+	}
+
+	if len(input) >= 5 {
+		r.Warning = "您的名字有点长，可以勉强接收"
+	}
+	return
+}
+
+func initGetBasicUserInfo(openid string) (initState chatState) {
+	return
+}