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Make methods #59

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8478b1d
make methods
k-ueki Oct 27, 2019
b852e30
mv methods to handler.go
k-ueki Oct 27, 2019
d2e8ae9
make methods
k-ueki Oct 27, 2019
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182 changes: 169 additions & 13 deletions handler.go
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Original file line number Diff line number Diff line change
Expand Up @@ -2,34 +2,190 @@ package main

import (
"encoding/json"
"fmt"
"net/http"
"strconv"
)

// いずれ外部APIのインターフェイスDIする
type handlers struct {
func (c *Client) Index(w http.ResponseWriter, r *http.Request) {
resp, err := http.Get("https://lottery-dot-tenntenn-samples.appspot.com/available_lotteries")
if err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}
defer resp.Body.Close()

var lotteries []*Lottery
if err := json.NewDecoder(resp.Body).Decode(&lotteries); err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}

if err := listTmpl.Execute(w, lotteries); err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}
}

func (h handlers) listPage() http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
resp, err := http.Get("https://lottery-dot-tenntenn-samples.appspot.com/available_lotteries")
if err != nil {
func (c *Client) GetPurchasePage(w http.ResponseWriter, r *http.Request) {
resp, err := http.Get("https://lottery-dot-tenntenn-samples.appspot.com/lottery?id=" + r.FormValue("id"))
if err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}
defer resp.Body.Close()

var l Lottery
if err := json.NewDecoder(resp.Body).Decode(&l); err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}

data := struct {
Lottery
Remain int64
}{
Lottery: l,
Remain: l.Num, // TODO: 残りを計算する
}
if err := purchasePageTmpl.Execute(w, data); err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}
}

func (c *Client) Purchase(w http.ResponseWriter, r *http.Request) {
id := r.FormValue("id")
num, err := strconv.Atoi(r.FormValue("num"))
if err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}
// TODO: パラメタのバリデーション

resp, err := http.Get("https://lottery-dot-tenntenn-samples.appspot.com/lottery?id=" + id)
if err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}
defer resp.Body.Close()

var l Lottery
if err := json.NewDecoder(resp.Body).Decode(&l); err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}

var count int
if err := c.DB.QueryRow("SELECT COUNT(*) FROM purchased WHERE lottery_id = ?", l.ID).Scan(&count); err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}

for i := 1; i <= num; i++ {
const sql = "INSERT INTO purchased(lottery_id, number) values (?,?)"
format := fmt.Sprintf(`%%0%dd`, len(strconv.FormatInt(l.Num-1, 10)))
n := fmt.Sprintf(format, count+i)
if _, err := c.DB.Exec(sql, id, n); err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}
defer resp.Body.Close()
}

http.Redirect(w, r, "/purchase_page?id="+l.ID, http.StatusFound)
}

func (c *Client) Result(w http.ResponseWriter, r *http.Request) {
resp1, err := http.Get("https://lottery-dot-tenntenn-samples.appspot.com/result?id=" + r.FormValue("id"))
if err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}
defer resp1.Body.Close()

var result Result
if err := json.NewDecoder(resp1.Body).Decode(&result); err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}

resp2, err := http.Get("https://lottery-dot-tenntenn-samples.appspot.com/lottery?id=" + r.FormValue("id"))
if err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}
defer resp2.Body.Close()

var l Lottery
if err := json.NewDecoder(resp2.Body).Decode(&l); err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}

var lotteries []*Lottery
if err := json.NewDecoder(resp.Body).Decode(&lotteries); err != nil {
type winner struct {
Prize *Prize
Numbers []string
}

data := struct {
Lottery
Winners map[string]*winner
}{
Lottery: l,
Winners: map[string]*winner{},
}

rows, err := c.DB.Query("SELECT number FROM purchased WHERE lottery_id = ?", l.ID)
if err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}
for rows.Next() {
var number string
if err := rows.Scan(&number); err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}

if err := listTmpl.Execute(w, lotteries); err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
for i := range result.Winners {
for _, n := range result.Winners[i].Numbers {
if number == n {
prizeID := result.Winners[i].PrizeID
if data.Winners[prizeID] == nil {
for _, p := range l.Prizes {
if p.ID == prizeID {
data.Winners[prizeID] = &winner{
Prize: p,
}
}
}
}
data.Winners[prizeID].Numbers = append(data.Winners[prizeID].Numbers, n)
}
}
}
}

if err := resultTmpl.Execute(w, data); err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}
}
169 changes: 9 additions & 160 deletions main.go
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Expand Up @@ -11,16 +11,17 @@ TODO

import (
"database/sql"
"encoding/json"
"fmt"
"net"
"net/http"
"os"
"strconv"

_ "github.com/mattn/go-sqlite3"
)

type Client struct {
DB *sql.DB
}

func main() {

db, err := sql.Open("sqlite3", "database.db")
Expand All @@ -31,168 +32,16 @@ func main() {
if err := initDB(db); err != nil {
panic(err)
}
h := handlers{}
http.HandleFunc("/", h.listPage())

http.HandleFunc("/purchase_page", func(w http.ResponseWriter, r *http.Request) {
resp, err := http.Get("https://lottery-dot-tenntenn-samples.appspot.com/lottery?id=" + r.FormValue("id"))
if err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}
defer resp.Body.Close()

var l Lottery
if err := json.NewDecoder(resp.Body).Decode(&l); err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}

data := struct {
Lottery
Remain int64
}{
Lottery: l,
Remain: l.Num, // TODO: 残りを計算する
}
if err := purchasePageTmpl.Execute(w, data); err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}
})

http.HandleFunc("/purchase", func(w http.ResponseWriter, r *http.Request) {
id := r.FormValue("id")
num, err := strconv.Atoi(r.FormValue("num"))
if err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}
// TODO: パラメタのバリデーション

resp, err := http.Get("https://lottery-dot-tenntenn-samples.appspot.com/lottery?id=" + id)
if err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}
defer resp.Body.Close()

var l Lottery
if err := json.NewDecoder(resp.Body).Decode(&l); err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}

var count int
if err := db.QueryRow("SELECT COUNT(*) FROM purchased WHERE lottery_id = ?", l.ID).Scan(&count); err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}

for i := 1; i <= num; i++ {
const sql = "INSERT INTO purchased(lottery_id, number) values (?,?)"
format := fmt.Sprintf(`%%0%dd`, len(strconv.FormatInt(l.Num-1, 10)))
n := fmt.Sprintf(format, count+i)
if _, err := db.Exec(sql, id, n); err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}
}

http.Redirect(w, r, "/purchase_page?id="+l.ID, http.StatusFound)
})

http.HandleFunc("/result", func(w http.ResponseWriter, r *http.Request) {
resp1, err := http.Get("https://lottery-dot-tenntenn-samples.appspot.com/result?id=" + r.FormValue("id"))
if err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}
defer resp1.Body.Close()

var result Result
if err := json.NewDecoder(resp1.Body).Decode(&result); err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}

resp2, err := http.Get("https://lottery-dot-tenntenn-samples.appspot.com/lottery?id=" + r.FormValue("id"))
if err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}
defer resp2.Body.Close()

var l Lottery
if err := json.NewDecoder(resp2.Body).Decode(&l); err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}

type winner struct {
Prize *Prize
Numbers []string
}
client := Client{DB: db}

data := struct {
Lottery
Winners map[string]*winner
}{
Lottery: l,
Winners: map[string]*winner{},
}
http.HandleFunc("/", client.Index)

rows, err := db.Query("SELECT number FROM purchased WHERE lottery_id = ?", l.ID)
if err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}
for rows.Next() {
var number string
if err := rows.Scan(&number); err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}
http.HandleFunc("/purchase_page", client.GetPurchasePage)

for i := range result.Winners {
for _, n := range result.Winners[i].Numbers {
if number == n {
prizeID := result.Winners[i].PrizeID
if data.Winners[prizeID] == nil {
for _, p := range l.Prizes {
if p.ID == prizeID {
data.Winners[prizeID] = &winner{
Prize: p,
}
}
}
}
data.Winners[prizeID].Numbers = append(data.Winners[prizeID].Numbers, n)
}
}
}
}
http.HandleFunc("/purchase", client.Purchase)

if err := resultTmpl.Execute(w, data); err != nil {
const status = http.StatusInternalServerError
http.Error(w, http.StatusText(status), status)
return
}
})
http.HandleFunc("/result", client.Result)

port := os.Getenv("PORT")
if port == "" {
Expand Down
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