/
cron.go
97 lines (86 loc) · 2.61 KB
/
cron.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
// Copyright 2021 Ahmet Alp Balkan
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"context"
"fmt"
"net/http"
"strings"
"time"
"go.uber.org/zap"
"golang.org/x/sync/semaphore"
"google.golang.org/api/idtoken"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"github.com/grpcoin/grpcoin/userdb"
)
var (
maxPortfolioHistory = time.Hour * 24 * 31
)
func (fe *frontend) calcPortfolioHistory(w http.ResponseWriter, r *http.Request) error {
log := loggerFrom(r.Context())
if fe.CronSAEmail != "" {
token := strings.TrimPrefix(r.Header.Get("authorization"), "Bearer ")
if err := verifyJWT(r.Context(), fe.CronSAEmail, token); err != nil {
return status.Error(codes.PermissionDenied, err.Error())
}
log.Info("jwt verification passed")
}
subCtx, s := fe.Trace.Start(r.Context(), "retrieve users")
users, err := fe.DB.GetAll(subCtx)
if err != nil {
return err
}
s.End()
t := time.Now().UTC().Truncate(time.Hour)
quotes, err := fe.getQuotes(r.Context())
if err != nil {
return err
}
var batchSize int64 = 10
sem := semaphore.NewWeighted(batchSize)
// TODO process in parallel in batches
for _, u := range users {
sem.Acquire(context.TODO(), 1)
go func(u userdb.User) {
defer sem.Release(1)
pv := valuation(u.Portfolio, quotes)
if err := fe.DB.SetUserValuationHistory(r.Context(), u.ID, userdb.ValuationHistory{
Date: t,
Value: pv,
}); err != nil {
log.Warn("failed to process user", zap.String("id", u.ID), zap.Error(err))
return
}
if err := fe.DB.RotateUserValuationHistory(r.Context(), u.ID,
t.Add(-maxPortfolioHistory)); err != nil {
log.Warn("rotation history failed", zap.String("id", u.ID), zap.Error(err))
return
}
log.Debug("processed user", zap.String("id", u.ID))
}(u)
}
return sem.Acquire(r.Context(), batchSize)
}
func verifyJWT(ctx context.Context, expectedSAEmail, token string) error {
p, err := idtoken.Validate(ctx, token, "")
if err != nil {
return err
}
em := p.Claims["email"]
if em != expectedSAEmail {
return fmt.Errorf("request identity %q is not the expected account", em)
}
return nil
}