finish tutorial 1

https://www.youtube.com/watch?v=pwZuNmAzaH8&list=PL0xRBLFXXsP6nudFDqMXzrvQCZrxSOm-2&index=1&pp=iAQB0gcJCQMKAYcqIYzv

Author: Ranuga Disansa

Go/GoBank/Makefile

@@ -2,7 +2,7 @@ build:
 	@go build -o bin/gobank
 
 run: 
-	build
+	make build
 	@./bin/gobank
 
 test:

Go/GoBank/api.go

@@ -1 +1,70 @@
 package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"log"
+	"net/http"
+
+	"github.com/gorilla/mux"
+)
+
+func WriteJSON(w http.ResponseWriter, status int, v any) error {
+	w.WriteHeader(status)
+	w.Header().Set("Content-Type", "application/json")
+	return json.NewEncoder(w).Encode(v)
+}
+
+type apiFunc func(http.ResponseWriter, *http.Request) error
+
+type ApiError struct {
+	Error string
+}
+
+func makeHttpHandleFunc(f apiFunc) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if err := f(w, r); err != nil {
+			WriteJSON(w, http.StatusBadRequest, ApiError{Error: "Bad Error"})
+		}
+	}
+}
+
+type APIServer struct {
+	listenAddr string
+}
+
+func NewAPIServer(listenAdd string) *APIServer {
+	return &APIServer{
+		listenAddr: listenAdd,
+	}
+}
+
+func (s *APIServer) Run() {
+	router := mux.NewRouter()
+	router.HandleFunc("/account", makeHttpHandleFunc(s.handleAccount))
+	router.HandleFunc("/account/{id}", makeHttpHandleFunc(s.handleGetAccount))
+	log.Println("JSON API Server Running on Port: ", s.listenAddr)
+	http.ListenAndServe(s.listenAddr, router)
+}
+
+func (s *APIServer) handleAccount(w http.ResponseWriter, r *http.Request) error {
+	if r.Method == "GET" {
+		return s.handleGetAccount(w, r)
+	}
+	if r.Method == "POST" {
+		return s.handleCreateAccount(w, r)
+	}
+	if r.Method == "DELETE" {
+		return s.handleDeleteAccount(w, r)
+	}
+	return fmt.Errorf("Method Not Allowed %s", r.Method)
+}
+
+func (s *APIServer) handleGetAccount(w http.ResponseWriter, r *http.Request) error {
+	vars := mux.Vars(r)
+	// account := NewAccount("ranuga", "gamage")
+	return WriteJSON(w, http.StatusOK, vars)
+}
+func (s *APIServer) handleCreateAccount(w http.ResponseWriter, r *http.Request) error { return nil }
+func (s *APIServer) handleDeleteAccount(w http.ResponseWriter, r *http.Request) error { return nil }
+func (s *APIServer) handleTransfer(w http.ResponseWriter, r *http.Request) error      { return nil }

Go/GoBank/bin/gobank

@@ -1,3 +1,5 @@
 module github.com/Programmer-RD-AI/learning
 
 go 1.25.3
+
+require github.com/gorilla/mux v1.8.1 // indirect

Go/GoBank/go.mod

@@ -0,0 +1,2 @@
+github.com/gorilla/mux v1.8.1 h1:TuBL49tXwgrFYWhqrNgrUNEY92u81SPhu7sTdzQEiWY=
+github.com/gorilla/mux v1.8.1/go.mod h1:AKf9I4AEqPTmMytcMc0KkNouC66V3BtZ4qD5fmWSiMQ=

Go/GoBank/go.sum

@@ -1,7 +1,6 @@
 package main
 
-import "fmt"
-
 func main() {
-	fmt.Println("hello world")
+	server := NewAPIServer(":3000")
+	server.Run()
 }

Go/GoBank/main.go

@@ -0,0 +1,20 @@
+package main
+
+import "math/rand"
+
+type Account struct {
+	ID        int    `json:"id"`
+	FirstName string `json:"firstName"`
+	LastName  string `json:"lastName"`
+	Number    int64  `json:"number"`
+	Balance   int64  `json:"balance"`
+}
+
+func NewAccount(firstName, lastName string) *Account {
+	return &Account{
+		ID:        rand.Intn(1000),
+		FirstName: firstName,
+		LastName:  lastName,
+		Number:    int64(rand.Intn(100000)),
+	}
+}