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Create Projections #2

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85 changes: 77 additions & 8 deletions main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -40,11 +40,21 @@ type Message interface {
GetId() string
}
func listTodoListsPageHandler(w http.ResponseWriter, r *http.Request) {
todoLists := []TodoList{}
// todoLists := []TodoList{}
var todoLists []TodoList
file, err := ioutil.ReadFile("storage/projections/todoLists")
if err != nil { json.Unmarshal(file, &todoLists) }
if err != nil {
fmt.Println("listTodoListsPageHandler error: ", err)
} else {
fmt.Printf("listTodoListsPageHandler file = %s\n", file)
err = json.Unmarshal(file, &todoLists)
if err != nil {
fmt.Println("listTodoListsPageHandler Unmarshal error: ", err)
} else {
fmt.Printf("listTodoListsPageHandler unmarshalled = %#v\n", todoLists)
}
}
PageTemplates.ExecuteTemplate(w, "todoLists.html", todoLists)

}
var PageTemplates = template.Must(template.ParseGlob("templates/*.html"))
var Info = log.New(os.Stdout, "INFO: ", log.Ldate|log.Ltime|log.Lshortfile)
Expand All @@ -64,6 +74,8 @@ func pseudo_uuid() (uuid string) {
func main() {
makeStorage()

fmt.Println("Now listening on http://localhost:8080 ...")

http.HandleFunc("/Todolists", listTodoListsPageHandler)
http.HandleFunc("/createTodoList", createTodoList)
http.HandleFunc("/createTodoListForm", showCreateTodoListForm)
Expand Down Expand Up @@ -92,7 +104,7 @@ func handleCreateTodoList(todoListCreate *TodoListCreate) {
storeEvent(todoListCreated)
}
func storeEvent(event Message) {
//TODO: wrap all of this so if anything fails we reset or stash the workind directory
//TODO: wrap all of this so if anything fails we reset or stash the working directory
name := UpdateStream(event)
UpdateStreamIndex(name)
UpdateReadModels(event)
Expand All @@ -101,7 +113,15 @@ func storeEvent(event Message) {
git("commit", "-m",event.GetId())
}
func UpdateStreamIndex(eventName string) {
ioutil.WriteFile("storage/event-stream/index",[]byte(eventName),0700)
f, err := os.OpenFile("storage/event-stream/index", os.O_RDWR|os.O_APPEND|os.O_CREATE, 0700)
if err != nil {
fmt.Printf("UpdateStreamIndex OpenFile err = %v\n", err)
}
defer f.Close()
_, err = f.WriteString(eventName+"\n")
if err != nil {
fmt.Printf("UpdateStreamIndex Write err = %v\n", err)
}
}

func UpdateReadModels(event interface{}) {
Expand All @@ -118,12 +138,60 @@ func UpdateCountOfTodoLists(event interface{}) {
}
count, _ = strconv.Atoi(string(fileStoredCount))
ioutil.WriteFile("storage/projections/TodoListsCount", []byte(strconv.Itoa(count + 1)), 0700)
}
}
func UpdateTodoDetails(event interface{}) {

}
func UpdateListOfTodos(event interface{}) {

fn := "storage/projections/todoLists"
fi, err := os.Stat(fn)
fmt.Println("UpdateListOfTodos Stat err = ", err)
if err != nil {
f, err := os.Create(fn)
if err != nil {
fmt.Println("UpdateListOfTodos Create err = ", err)
}
err = f.Chmod(0700)
if err != nil {
fmt.Println("UpdateListOfTodos Chmod err = ", err)
}
_, err = f.Write([]byte("["))
if err != nil {
fmt.Println("UpdateListOfTodos 1st Write err = ", err)
}
f.Close()
}
fi, err = os.Stat(fn)
if fi.Size() > 1 {
fmt.Println("UpdateListOfTodos file size = ", fi.Size())
f, err := os.OpenFile("storage/projections/todoLists", os.O_RDWR|os.O_APPEND, 0700)
if err != nil {
fmt.Printf("UpdateListOfTodos 1st OpenFile err = %v\n", err)
}
err = f.Truncate(fi.Size()-1)
if err != nil {
fmt.Printf("UpdateListOfTodos Truncate err = %v\n", err)
}
f.Close()
}
f, err := os.OpenFile("storage/projections/todoLists", os.O_RDWR|os.O_APPEND, 0700)
defer f.Close()
if fi.Size() > 1 {
_, err = f.Write([]byte(","))
if err != nil {
fmt.Println("UpdateListOfTodos 2nd Write err = ", err)
}
}
serializedBytes, _ := json.Marshal(event)
Info.Println(fmt.Printf("UpdateListOfTodos serializedBytes = %s\n", serializedBytes))
_, err = f.Write(serializedBytes)
if err != nil {
fmt.Println("UpdateListOfTodos 3rd Write err = ", err)
}
_, err = f.Write([]byte("]"))
if err != nil {
fmt.Println("UpdateListOfTodos 4th Write err = ", err)
}
}
func UpdateStream(event Message) (string) {
streamDir := path.Join("storage/event-stream", event.GetId())
Expand Down Expand Up @@ -152,7 +220,8 @@ func UpdateStream(event Message) (string) {
}

func git(command string, args ...string) {
exec.Command("git", append([]string{"-C", "storage", command}, args...)...).Run() }
exec.Command("git", append([]string{"-C", "storage", command}, args...)...).Run()
}

func makeStorage() {
_, err := os.Stat("storage")
Expand Down
6 changes: 3 additions & 3 deletions templates/createTodoList.html
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Original file line number Diff line number Diff line change
Expand Up @@ -2,16 +2,16 @@
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Orders</title>
<title>Create TodoList</title>
</head>
<body>
<div>
{{template "menu.html"}}
<h2>Create TodoList</h2>
<form action="/createTodoList" method="post">
<span>Name of Todo List: </span>
<input type="text" id="name" />
<input type="submit"/>
<input type="text" name="name" />
<input type="submit" value="Create" />
</form>
</div>
</body>
Expand Down
4 changes: 2 additions & 2 deletions templates/todoLists.html
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Original file line number Diff line number Diff line change
Expand Up @@ -10,11 +10,11 @@
<h2>Todo Lists</h2>
<ul>
{{ range . }}
<li>{{ .id }} - {{ .date }}</li>
<li>{{ .Name }}</li>
{{ else }}
<li>No todo lists yet.</li>
{{ end }}
</ul>
</div>
</body>
</html>
</html>