-
Notifications
You must be signed in to change notification settings - Fork 0
/
draw.go
244 lines (228 loc) · 5.77 KB
/
draw.go
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
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
package quickdraw
import (
"github.com/lib/pq"
"database/sql"
"encoding/json"
"fmt"
"io/ioutil"
"log"
"net/http"
"strconv"
"strings"
"time"
)
// Draw represents a quickdraw entry
type Draw struct {
DrawDate time.Time `json:"draw_date"`
DrawNumber int `json:"draw_number"`
DrawTime string `json:"draw_time"`
WinningNumbers []int64 `json:"winning_numbers"`
Extra int `json:"extra_multiplier"`
}
// Draws is a collection of Draw
type Draws []*Draw
const (
fetchURL = "https://data.ny.gov/resource/7sqk-ycpk.json"
dateForm = "2006-01-02T00:00:00.000"
// LowPick is the lowest pick number available
LowPick = 1
// HighPick is the highest pick number available
HighPick = 80
refreshViewsQuery = `
REFRESH MATERIALIZED VIEW freq_1day;
REFRESH MATERIALIZED VIEW freq_7day;
REFRESH MATERIALIZED VIEW freq_30day;
REFRESH MATERIALIZED VIEW freq_all_time;
`
)
// RefreshViews will refresh the materialized views
func RefreshViews(db *sql.DB) error {
_, err := db.Query(refreshViewsQuery)
if err != nil {
return err
}
return nil
}
// ScrapeLiveDraws scrapes the live website for new draw data and inserts it into db
func ScrapeLiveDraws(db *sql.DB) error {
newDraws, err := scrapeLive()
if err != nil {
return err
}
for _, d := range newDraws {
err = d.CheckAndInsert(db)
if err != nil {
return err
}
}
return RefreshViews(db)
}
// ImportLatest imports the latest entries from the API
func ImportLatest(db *sql.DB) error {
resp, err := http.Get(fetchURL)
if err != nil {
return err
}
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return err
}
newDraws := []*Draw{}
err = json.Unmarshal(body, &newDraws)
if err != nil {
return err
}
for _, d := range newDraws {
err = d.CheckAndInsert(db)
if err != nil {
return err
}
}
return RefreshViews(db)
}
func getFreqView(viewName string, db *sql.DB) (map[int]int, error) {
counts := map[int]int{}
query := fmt.Sprintf("SELECT * FROM %s", viewName)
rows, err := db.Query(query)
if err != nil {
return nil, err
}
defer rows.Close()
for rows.Next() {
var pick, ct int
if err := rows.Scan(&pick, &ct); err != nil {
return nil, err
}
counts[pick] = ct
}
return counts, nil
}
// GetWinningNumbersFor retrieves a view in the database relating to the past winning numbers based on the viewname
func GetWinningNumbersFor(viewName string, db *sql.DB) (map[int]int, error) {
switch viewName {
case "oneday":
return getFreqView("freq_1day", db)
case "oneweek":
return getFreqView("freq_7day", db)
case "onemonth":
return getFreqView("freq_30day", db)
case "alltime":
return getFreqView("freq_all_time", db)
}
return nil, fmt.Errorf("no valid freq time specified")
}
// GetTotalRowsCount gets the total number of records in the database for pagination purposes
func GetTotalRowsCount(db *sql.DB) (int, error) {
var totalRows int
totalRowsQuery := "SELECT count(*) FROM draws"
row := db.QueryRow(totalRowsQuery)
err := row.Scan(&totalRows)
if err != nil {
return 0, err
}
return totalRows, nil
}
// GetDraws queries all draws based on the arguments provided
func GetDraws(db *sql.DB, pageNum int, pageSize int, orderBy string, sortDir string) (Draws, error) {
var offset int = 0
if pageNum > 1 {
offset = pageNum * pageSize
}
query := fmt.Sprintf("SELECT * FROM draws ORDER BY draws.%s %s OFFSET %d LIMIT %d", orderBy, sortDir, offset, pageSize)
rows, err := db.Query(query)
if err != nil {
return nil, err
}
draws := []*Draw{}
defer rows.Close()
for rows.Next() {
var dn, de int
var wn pq.Int64Array
var dd, dt string
if err := rows.Scan(&dn, &dd, &dt, &wn, &de); err != nil {
return nil, err
}
parsedDate, _ := time.Parse(time.RFC3339, dd)
d := &Draw{
DrawNumber: dn,
DrawDate: parsedDate,
Extra: de,
WinningNumbers: []int64(wn),
DrawTime: dt,
}
draws = append(draws, d)
}
return draws, nil
}
// WinningNumbersString converts the winning numbers array to a string value
func (d Draw) WinningNumbersString() string {
ss := ""
for i, n := range d.WinningNumbers {
var comma = ","
if i == 0 {
comma = ""
}
ss = fmt.Sprintf("%s%s %s", ss, comma, strconv.Itoa(int(n)))
}
return ss
}
// Insert inserts a draw into the database
func (d Draw) Insert(db *sql.DB) error {
a := fmt.Sprintf("ARRAY [%s]", d.WinningNumbersString())
insert := fmt.Sprintf("INSERT INTO draws (id, drawdate, drawtime, picks, extra) VALUES (%d, '%s', '%s', %s, %d)",
d.DrawNumber, d.DrawDate.Format("2006-01-02"), d.DrawTime, a, d.Extra)
_, err := db.Exec(insert)
if err != nil {
return err
}
log.Println("inserted new record for ", d.DrawNumber)
return nil
}
// CheckAndInsert checks if a draw exists and if it doesn't, inserts it into the database
func (d Draw) CheckAndInsert(db *sql.DB) error {
var found int
row := db.QueryRow(fmt.Sprintf("SELECT id FROM draws WHERE id = %d", d.DrawNumber))
err := row.Scan(&found)
switch {
case err == sql.ErrNoRows:
return d.Insert(db)
case err == nil:
return nil
default:
return err
}
}
// UnmarshalJSON unmarshals custom into Draw struct
func (d *Draw) UnmarshalJSON(b []byte) error {
var temp map[string]string
err := json.Unmarshal(b, &temp)
if err != nil {
return err
}
d.DrawNumber, err = strconv.Atoi(temp["draw_number"])
if err != nil {
return err
}
d.Extra, err = strconv.Atoi(temp["extra_multiplier"])
if err != nil {
return err
}
d.DrawDate, err = time.Parse(dateForm, temp["draw_date"])
if err != nil {
return err
}
d.DrawTime = temp["draw_time"]
if err != nil {
return err
}
winNums := strings.Split(temp["winning_numbers"], " ")
d.WinningNumbers = make([]int64, 0)
for _, n := range winNums {
w, err := strconv.Atoi(n)
if err != nil {
return err
}
d.WinningNumbers = append(d.WinningNumbers, int64(w))
}
return nil
}