1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
|
package main
import (
"log"
"net/http"
"database/sql"
"context"
_ "github.com/mattn/go-sqlite3"
"stevenlr.com/timer/view"
"stevenlr.com/timer/model"
)
func initializeDatabase(db *sql.DB) error {
tx, err := db.Begin()
if err != nil { return err }
defer tx.Rollback()
_, err = tx.Exec(`
CREATE TABLE Timer (
id BLOB NOT NULL UNIQUE,
name TEXT NOT NULL,
PRIMARY KEY (id)
)
`)
if err != nil { return err }
id := model.NewUUID()
_, err = tx.Exec(`
INSERT INTO Timer VALUES ($1, $2)`, id, "My timer");
if err != nil { return err }
id = model.NewUUID()
_, err = tx.Exec(`
INSERT INTO Timer VALUES ($1, $2)`, id, "My timer 2");
if err != nil { return err }
return tx.Commit()
}
func queryAllTimers(db *sql.DB) []model.Timer {
rows, err := db.Query("SELECT id, name FROM Timer")
if err != nil { log.Fatalln(err) }
timers := []model.Timer{}
for rows.Next() {
var t model.Timer
if err := rows.Scan(&t.Id, &t.Name); err == nil {
timers = append(timers, t)
}
}
return timers
}
func queryTimer(db *sql.DB, idStr string) *model.Timer {
var id model.UUID
if err := id.Scan(idStr); err != nil { return nil }
row := db.QueryRow("SELECT id, name FROM Timer WHERE id=$1", id)
var t model.Timer
if err := row.Scan(&t.Id, &t.Name); err == nil {
return &t
}
return nil
}
type myServer struct {
db *sql.DB
}
func (server *myServer) handleNotFound(w http.ResponseWriter, _ *http.Request) {
w.WriteHeader(http.StatusNotFound)
view.Main(view.Error404()).Render(context.Background(), w)
}
func (server *myServer) handleMain(w http.ResponseWriter, r *http.Request) {
if r.URL.Path == "/" {
timers := queryAllTimers(server.db)
view.Main(view.TimersList(timers)).Render(context.Background(), w)
} else {
server.handleNotFound(w, r)
}
}
func (server *myServer) handleTimer(w http.ResponseWriter, r *http.Request) {
timer := queryTimer(server.db, r.PathValue("timerId"))
if timer != nil {
view.Main(view.TimerView(*timer)).Render(context.Background(), w)
} else {
server.handleNotFound(w, r)
}
}
func main() {
log.Println("Hello")
db, err := sql.Open("sqlite3", ":memory:")
if err != nil {
log.Fatalln(err)
}
defer db.Close()
if err := initializeDatabase(db); err != nil {
log.Fatalln(err)
}
myServer := myServer{ db: db }
fs := http.FileServer(http.Dir("static/"))
http.Handle("/static/", http.StripPrefix("/static/", fs))
http.HandleFunc("/timer/{timerId}", myServer.handleTimer)
http.HandleFunc("/", myServer.handleMain)
http.ListenAndServe("0.0.0.0:80", nil)
}
|
