massive: move a lot of things

x-tba/wizards-structs/marshal/main.go

@@ -0,0 +1,38 @@
+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+)
+
+// Wizard is one of the greatest of people
+type Wizard struct {
+	// name won't be marshalled (should be exported)
+	Name     string `json:"name,omitempty"`
+	Lastname string `json:"last_name"`
+	Nick     string `json:"-"`
+}
+
+func main() {
+	wizards := []Wizard{
+		{Name: "Albert", Lastname: "Einstein", Nick: "emc2"},
+		{Name: "Isaac", Lastname: "Newton", Nick: "apple"},
+		{Name: "Stephen", Lastname: "Hawking", Nick: "blackhole"},
+		{Name: "Marie", Lastname: "Curie", Nick: "radium"},
+		{Name: "", Lastname: "Darwin", Nick: "fittest"},
+	}
+
+	bytes, err := json.MarshalIndent(wizards, "", "\t")
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(string(bytes))
+}

x-tba/wizards-structs/server/list.tmpl.html

@@ -0,0 +1,5 @@
+<h1>There are {{len .}} wizards.</h1>
+
+{{range .}}
+👉 {{.Name}} {{.Lastname}} ({{.Nick}})
+{{end}}

x-tba/wizards-structs/server/main.go

@@ -0,0 +1,46 @@
+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+import (
+	"encoding/json"
+	"net/http"
+)
+
+func main() {
+	http.HandleFunc("/add", onlyPost(add))
+	http.HandleFunc("/list", list)
+	panic(http.ListenAndServe(":8000", nil))
+}
+
+func add(w http.ResponseWriter, r *http.Request) {
+	var wiz wizard
+	if err := json.NewDecoder(r.Body).Decode(&wiz); err != nil {
+		panic(err)
+	}
+
+	db.add(wiz)
+	w.WriteHeader(http.StatusOK)
+}
+
+func list(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Content-Type", "text/html; charset=UTF-8")
+	w.WriteHeader(http.StatusOK)
+	tmpl.Execute(w, db.list())
+}
+
+func onlyPost(next http.HandlerFunc) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if r.Method == "POST" {
+			next(w, r)
+			return
+		}
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte("NOT OK"))
+	}
+}

x-tba/wizards-structs/server/store.go

@@ -0,0 +1,32 @@
+package main
+
+import "sync"
+
+type wizard struct {
+	Name     string `json:"name"`
+	Lastname string `json:"last_name"`
+	Nick     string `json:"nick"`
+}
+
+type storage struct {
+	sync.RWMutex
+	wizards []wizard
+}
+
+func (db *storage) add(w wizard) {
+	db.Lock()
+	defer db.Unlock()
+	db.wizards = append(db.wizards, w)
+}
+
+func (db *storage) list() []wizard {
+	db.RLock()
+	defer db.RUnlock()
+	return db.wizards
+}
+
+var db *storage
+
+func init() {
+	db = new(storage)
+}

x-tba/wizards-structs/server/templates.go

@@ -0,0 +1,11 @@
+package main
+
+import "html/template"
+
+var tmpl *template.Template
+
+func init() {
+	tmpl = template.Must(
+		template.New("list.tmpl").
+			ParseFiles("list.tmpl"))
+}

x-tba/wizards-structs/unmarshal/main.go

@@ -0,0 +1,35 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"strings"
+)
+
+// Wizard is one of the greatest of people
+type Wizard struct {
+	// name won't be marshalled (should be exported)
+	Name     string `json:name`
+	Lastname string `json:"-"`
+	Nick     string `json:"nick"`
+}
+
+func main() {
+	file, err := ioutil.ReadFile("../marshal/wizards.json")
+	if err != nil {
+		panic(err)
+	}
+
+	wizards := make([]Wizard, 10)
+	if json.Unmarshal(file, &wizards) != nil {
+		panic(err)
+	}
+
+	fmt.Printf("%-15s %-15s\n%s",
+		"Name", "Nick", strings.Repeat("=", 25))
+
+	for _, w := range wizards {
+		fmt.Printf("%-15s %-15s\n", w.Name, w.Nick)
+	}
+}