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composite_stats.go
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composite_stats.go
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// Copyright 2021 Google LLC
//
// 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 database
import (
"bytes"
"encoding/csv"
"encoding/json"
"fmt"
"sort"
"strconv"
"strings"
"time"
keyserver "github.com/google/exposure-notifications-server/pkg/api/v1"
"github.com/google/exposure-notifications-verification-server/internal/icsv"
"github.com/google/exposure-notifications-verification-server/internal/project"
)
// Type assertions for CompositeStats
var (
_ icsv.Marshaler = (CompositeStats)(nil)
_ json.Marshaler = (CompositeStats)(nil)
)
// CompositeStats is an internal type for collecting unifed realm and key server stats.
type CompositeStats []*CompositeDay
// CompositeDay represents a single day of composite stats.
type CompositeDay struct {
Day time.Time
RealmStats *RealmStat
KeyServerStats *keyserver.StatsDay
}
type jsonCompositeStat struct {
RealmID uint `json:"realm_id"`
HasKeyServerStats bool `json:"has_key_server_stats"`
Stats []*jsonCompositeStatStats `json:"statistics"`
}
type jsonCompositeStatStats struct {
Date time.Time `json:"date"`
Data *jsonCompositeStatStatsData `json:"data"`
}
type jsonCompositeStatStatsData struct {
JSONRealmStatStatsData
keyserver.StatsDay
// the only field that isn't from an embedded struct.
TotalPublishRequests int64 `json:"total_publish_requests"`
}
// MarshalJSON is a custom JSON marshaller.
func (c CompositeStats) MarshalJSON() ([]byte, error) {
// Do nothing if there's no records
if len(c) == 0 {
return json.Marshal(struct{}{})
}
var realmID uint
hasKeyServerStats := false
stats := make([]*jsonCompositeStatStats, 0, len(c))
for _, stat := range c {
data := &jsonCompositeStatStatsData{}
if stat.RealmStats != nil {
if realmID == 0 {
realmID = stat.RealmStats.RealmID
}
data.CodesIssued = stat.RealmStats.CodesIssued
data.CodesClaimed = stat.RealmStats.CodesClaimed
data.CodesInvalid = stat.RealmStats.CodesInvalid
data.CodesInvalidByOS = CodesInvalidByOSData{
UnknownOS: stat.RealmStats.CodesInvalidByOS[OSTypeUnknown],
IOS: stat.RealmStats.CodesInvalidByOS[OSTypeIOS],
Android: stat.RealmStats.CodesInvalidByOS[OSTypeAndroid],
}
data.UserReportsIssued = stat.RealmStats.UserReportsIssued
data.UserReportsClaimed = stat.RealmStats.UserReportsClaimed
data.TokensClaimed = stat.RealmStats.TokensClaimed
data.TokensInvalid = stat.RealmStats.TokensInvalid
data.UserReportTokensClaimed = stat.RealmStats.UserReportTokensClaimed
data.CodeClaimMeanAge = uint(stat.RealmStats.CodeClaimMeanAge.Duration.Seconds())
data.CodeClaimDistribution = stat.RealmStats.CodeClaimAgeDistribution
}
if stat.KeyServerStats != nil {
hasKeyServerStats = true
data.TotalPublishRequests = stat.KeyServerStats.PublishRequests.Total()
data.PublishRequests = stat.KeyServerStats.PublishRequests
data.TotalTEKsPublished = stat.KeyServerStats.TotalTEKsPublished
data.RevisionRequests = stat.KeyServerStats.RevisionRequests
data.TEKAgeDistribution = stat.KeyServerStats.TEKAgeDistribution
data.OnsetToUploadDistribution = stat.KeyServerStats.OnsetToUploadDistribution
data.RequestsMissingOnsetDate = stat.KeyServerStats.RequestsMissingOnsetDate
}
stats = append(stats, &jsonCompositeStatStats{
Date: stat.Day,
Data: data,
})
}
// Sort in descending order.
sort.Slice(stats, func(i, j int) bool {
return stats[i].Date.After(stats[j].Date)
})
var result jsonCompositeStat
result.RealmID = realmID
result.HasKeyServerStats = hasKeyServerStats
result.Stats = stats
b, err := json.Marshal(result)
if err != nil {
return nil, fmt.Errorf("failed to marshal json: %w", err)
}
return b, nil
}
func (c *CompositeStats) UnmarshalJSON(b []byte) error {
if len(b) == 0 {
return nil
}
// This is unused, but required for the interface.
return nil
}
// MarshalCSV returns bytes in CSV format.
func (c CompositeStats) MarshalCSV() ([]byte, error) {
// Do nothing if there's no records
if len(c) == 0 {
return nil, nil
}
var b bytes.Buffer
w := csv.NewWriter(&b)
if err := w.Write([]string{
"date",
"codes_issued", "codes_claimed", "codes_invalid",
"tokens_claimed", "tokens_invalid", "code_claim_mean_age_seconds", "code_claim_age_distribution",
"publish_requests_unknown", "publish_requests_android", "publish_requests_ios",
"total_teks_published", "requests_with_revisions", "requests_missing_onset_date", "tek_age_distribution", "onset_to_upload_distribution",
"user_reports_issued", "user_reports_claimed", "user_report_tokens_claimed",
"codes_invalid_unknown_os", "codes_invalid_ios", "codes_invalid_android",
}); err != nil {
return nil, fmt.Errorf("failed to write CSV header: %w", err)
}
// Due to the nature of the composite stats, one or the other of the branches could be nil
for i, stat := range c {
row := make([]string, 0, 16)
row = append(row, stat.Day.Format(project.RFC3339Date))
if stat.RealmStats == nil {
// no realm stats, 7 empty columns
row = append(row, "", "", "", "", "", "", "")
} else {
row = append(row, strconv.FormatUint(uint64(stat.RealmStats.CodesIssued), 10))
row = append(row, strconv.FormatUint(uint64(stat.RealmStats.CodesClaimed), 10))
row = append(row, strconv.FormatUint(uint64(stat.RealmStats.CodesInvalid), 10))
row = append(row, strconv.FormatUint(uint64(stat.RealmStats.TokensClaimed), 10))
row = append(row, strconv.FormatUint(uint64(stat.RealmStats.TokensInvalid), 10))
row = append(row, strconv.FormatUint(uint64(stat.RealmStats.CodeClaimMeanAge.Duration.Seconds()), 10))
row = append(row, strings.Join(stat.RealmStats.CodeClaimAgeDistributionAsStrings(), "|"))
}
if stat.KeyServerStats == nil {
// no key sever stats, 8 empty columns
row = append(row, "", "", "", "", "", "", "", "")
} else {
row = append(row, strconv.FormatUint(uint64(stat.KeyServerStats.PublishRequests.UnknownPlatform), 10))
row = append(row, strconv.FormatUint(uint64(stat.KeyServerStats.PublishRequests.Android), 10))
row = append(row, strconv.FormatUint(uint64(stat.KeyServerStats.PublishRequests.IOS), 10))
row = append(row, strconv.FormatUint(uint64(stat.KeyServerStats.TotalTEKsPublished), 10))
row = append(row, strconv.FormatUint(uint64(stat.KeyServerStats.RevisionRequests), 10))
row = append(row, strconv.FormatUint(uint64(stat.KeyServerStats.RequestsMissingOnsetDate), 10))
row = append(row, joinInt64s(stat.KeyServerStats.TEKAgeDistribution, "|"))
row = append(row, joinInt64s(stat.KeyServerStats.OnsetToUploadDistribution, "|"))
}
row = append(row, strconv.FormatUint(uint64(stat.RealmStats.UserReportsIssued), 10))
row = append(row, strconv.FormatUint(uint64(stat.RealmStats.UserReportsClaimed), 10))
row = append(row, strconv.FormatUint(uint64(stat.RealmStats.UserReportTokensClaimed), 10))
// Invalid codes by OS
if stat.RealmStats == nil {
row = append(row, "", "", "")
} else {
// stats day exists, but the array is nil.
if len(stat.RealmStats.CodesInvalidByOS) == 0 {
row = append(row, "", "", "")
} else {
row = append(row, strconv.FormatUint(uint64(stat.RealmStats.CodesInvalidByOS[OSTypeUnknown]), 10))
row = append(row, strconv.FormatUint(uint64(stat.RealmStats.CodesInvalidByOS[OSTypeIOS]), 10))
row = append(row, strconv.FormatUint(uint64(stat.RealmStats.CodesInvalidByOS[OSTypeAndroid]), 10))
}
}
// New stats should always be added to the end to preserve existing external user applications.
if err := w.Write(row); err != nil {
return nil, fmt.Errorf("failed to write CSV entry %d: %w", i, err)
}
}
w.Flush()
if err := w.Error(); err != nil {
return nil, fmt.Errorf("failed to create CSV: %w", err)
}
return b.Bytes(), nil
}
func joinInt64s(arr []int64, sep string) string {
var sb strings.Builder
for i, d := range arr {
sb.WriteString(strconv.FormatInt(d, 10))
if i != len(arr)-1 {
sb.WriteString(sep)
}
}
return sb.String()
}