hishtory/backend/server/internal/database/db.go

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package database
import (
"context"
"database/sql"
"fmt"
"strings"
"time"
2023-09-12 21:56:05 +02:00
"github.com/ddworken/hishtory/shared"
"github.com/jackc/pgx/v4/stdlib"
_ "github.com/lib/pq"
sqltrace "gopkg.in/DataDog/dd-trace-go.v1/contrib/database/sql"
gormtrace "gopkg.in/DataDog/dd-trace-go.v1/contrib/gorm.io/gorm.v1"
"gorm.io/driver/postgres"
"gorm.io/driver/sqlite"
"gorm.io/gorm"
)
type DB struct {
*gorm.DB
}
func OpenSQLite(dsn string, config *gorm.Config) (*DB, error) {
db, err := gorm.Open(sqlite.Open(dsn), config)
if err != nil {
return nil, fmt.Errorf("gorm.Open: %w", err)
}
return &DB{db}, nil
}
func OpenPostgres(dsn string, config *gorm.Config) (*DB, error) {
sqltrace.Register("pgx", &stdlib.Driver{}, sqltrace.WithServiceName("hishtory-api"))
sqlDb, err := sqltrace.Open("pgx", dsn)
if err != nil {
return nil, fmt.Errorf("sqltrace.Open: %w", err)
}
db, err := gormtrace.Open(postgres.New(postgres.Config{Conn: sqlDb}), config)
if err != nil {
return nil, fmt.Errorf("gormtrace.Open: %w", err)
}
return &DB{db}, nil
}
func (db *DB) AddDatabaseTables() error {
models := []any{
&shared.EncHistoryEntry{},
&shared.Device{},
&shared.UsageData{},
&shared.DumpRequest{},
&shared.DeletionRequest{},
&shared.Feedback{},
&ActiveUserStats{},
}
for _, model := range models {
if err := db.AutoMigrate(model); err != nil {
return fmt.Errorf("db.AutoMigrate: %w", err)
}
}
return nil
}
func (db *DB) CreateIndices() error {
// Note: If adding a new index here, consider manually running it on the prod DB using CONCURRENTLY to
// make server startup non-blocking. The benefit of this function is primarily for other people so they
// don't have to manually create these indexes.
// Example:
// CREATE INDEX CONCURRENTLY IF NOT EXISTS redact_idx ON enc_history_entries USING btree(user_id, device_id, date)
indices := []struct {
name string
table string
columns []string
}{
{"entry_id_idx", "enc_history_entries", []string{"encrypted_id"}},
{"device_id_idx", "enc_history_entries", []string{"device_id"}},
{"read_count_idx", "enc_history_entries", []string{"read_count"}},
{"redact_idx", "enc_history_entries", []string{"user_id", "device_id", "date"}},
{"del_user_idx", "deletion_requests", []string{"user_id"}},
}
for _, index := range indices {
sql := ""
if db.Name() == "sqlite" {
sql = fmt.Sprintf("CREATE INDEX IF NOT EXISTS %s ON %s (%s)", index.name, index.table, strings.Join(index.columns, ","))
} else {
sql = fmt.Sprintf("CREATE INDEX IF NOT EXISTS %s ON %s USING btree(%s)", index.name, index.table, strings.Join(index.columns, ","))
}
r := db.Exec(sql)
if r.Error != nil {
return fmt.Errorf("failed to execute index creation sql=%#v: %w", index, r.Error)
}
}
return nil
}
func (db *DB) Close() error {
rawDB, err := db.DB.DB()
if err != nil {
return fmt.Errorf("db.DB.DB: %w", err)
}
if err := rawDB.Close(); err != nil {
return fmt.Errorf("rawDB.Close: %w", err)
}
return nil
}
func (db *DB) Ping() error {
rawDB, err := db.DB.DB()
if err != nil {
return fmt.Errorf("db.DB.DB: %w", err)
}
if err := rawDB.Ping(); err != nil {
return fmt.Errorf("rawDB.Ping: %w", err)
}
return nil
}
func (db *DB) SetMaxIdleConns(n int) error {
rawDB, err := db.DB.DB()
if err != nil {
return err
}
rawDB.SetMaxIdleConns(n)
return nil
}
func (db *DB) Stats() (sql.DBStats, error) {
rawDB, err := db.DB.DB()
if err != nil {
return sql.DBStats{}, fmt.Errorf("db.DB.DB: %w", err)
}
return rawDB.Stats(), nil
}
func (db *DB) DistinctUsers(ctx context.Context) (int64, error) {
row := db.WithContext(ctx).Raw("SELECT COUNT(DISTINCT devices.user_id) FROM devices").Row()
var numDistinctUsers int64
err := row.Scan(&numDistinctUsers)
if err != nil {
return 0, fmt.Errorf("row.Scan: %w", err)
}
return numDistinctUsers, nil
}
func (db *DB) DumpRequestCreate(ctx context.Context, req *shared.DumpRequest) error {
tx := db.WithContext(ctx).Create(req)
if tx.Error != nil {
return fmt.Errorf("tx.Error: %w", tx.Error)
}
return nil
}
func (db *DB) DumpRequestForUserAndDevice(ctx context.Context, userID, deviceID string) ([]*shared.DumpRequest, error) {
var dumpRequests []*shared.DumpRequest
// Filter out ones requested by the hishtory instance that sent this request
tx := db.WithContext(ctx).Where("user_id = ? AND requesting_device_id != ?", userID, deviceID).Find(&dumpRequests)
if tx.Error != nil {
return nil, fmt.Errorf("tx.Error: %w", tx.Error)
}
return dumpRequests, nil
}
func (db *DB) DumpRequestDeleteForUserAndDevice(ctx context.Context, userID, deviceID string) error {
tx := db.WithContext(ctx).Delete(&shared.DumpRequest{}, "user_id = ? AND requesting_device_id = ?", userID, deviceID)
if tx.Error != nil {
return fmt.Errorf("tx.Error: %w", tx.Error)
}
return nil
}
func (db *DB) ApplyDeletionRequestsToBackend(ctx context.Context, requests []*shared.DeletionRequest) (int64, error) {
if len(requests) == 0 {
return 0, nil
}
deletedMessages := make([]shared.MessageIdentifier, 0)
userId := requests[0].UserId
for _, request := range requests {
deletedMessages = append(deletedMessages, request.Messages.Ids...)
if request.UserId != userId {
return 0, fmt.Errorf("deletion requests contain mismatched user IDs: %s vs %s", request.UserId, userId)
}
}
return db.DeleteMessagesFromBackend(ctx, userId, deletedMessages)
}
func (db *DB) DeleteMessagesFromBackend(ctx context.Context, userId string, deletedMessages []shared.MessageIdentifier) (int64, error) {
tx := db.WithContext(ctx).Where("false")
for _, message := range deletedMessages {
if userId == "" {
return 0, fmt.Errorf("failed to delete entry because userId is empty")
}
if message.DeviceId == "" {
return 0, fmt.Errorf("failed to delete entry because MessageIdentifier.DeviceId is empty")
}
if message.EndTime != (time.Time{}) && message.EntryId != "" {
// Note that we do an OR with date or the ID matching since the ID is not always recorded for older history entries.
tx = tx.Or(db.WithContext(ctx).Where("user_id = ? AND device_id = ? AND (date = ? OR encrypted_id = ?)", userId, message.DeviceId, message.EndTime, message.EntryId))
} else if message.EndTime != (time.Time{}) && message.EntryId == "" {
tx = tx.Or(db.WithContext(ctx).Where("user_id = ? AND device_id = ? AND (date = ?)", userId, message.DeviceId, message.EndTime))
} else if message.EndTime == (time.Time{}) && message.EntryId != "" {
tx = tx.Or(db.WithContext(ctx).Where("user_id = ? AND device_id = ? AND (encrypted_id = ?)", userId, message.DeviceId, message.EntryId))
} else {
return 0, fmt.Errorf("failed to delete entry because message.EndTime=%#v and message.EntryId=%#v are both empty", message.EndTime, message.EntryId)
}
}
result := tx.Delete(&shared.EncHistoryEntry{})
if tx.Error != nil {
return 0, fmt.Errorf("tx.Error: %w", tx.Error)
}
return result.RowsAffected, nil
}
func (db *DB) DeletionRequestInc(ctx context.Context, userID, deviceID string) error {
tx := db.WithContext(ctx).Exec("UPDATE deletion_requests SET read_count = read_count + 1 WHERE user_id = ? AND destination_device_id = ?", userID, deviceID)
if tx.Error != nil {
return fmt.Errorf("tx.Error: %w", tx.Error)
}
return nil
}
func (db *DB) DeletionRequestsForUserAndDevice(ctx context.Context, userID, deviceID string) ([]*shared.DeletionRequest, error) {
var deletionRequests []*shared.DeletionRequest
tx := db.WithContext(ctx).Where("user_id = ? AND destination_device_id = ?", userID, deviceID).Find(&deletionRequests)
if tx.Error != nil {
return nil, fmt.Errorf("tx.Error: %w", tx.Error)
}
return deletionRequests, nil
}
func (db *DB) DeletionRequestCreate(ctx context.Context, request *shared.DeletionRequest) error {
userID := request.UserId
devices, err := db.DevicesForUser(ctx, userID)
if err != nil {
return fmt.Errorf("db.DevicesForUser: %w", err)
}
if len(devices) == 0 {
return fmt.Errorf("found no devices associated with user_id=%s, can't save history entry", userID)
}
fmt.Printf("db.DeletionRequestCreate: Found %d devices\n", len(devices))
err = db.Transaction(func(tx *gorm.DB) error {
for _, device := range devices {
request.DestinationDeviceId = device.DeviceId
tx := tx.WithContext(ctx).Create(&request)
if tx.Error != nil {
return fmt.Errorf("create: tx.Error: %w", tx.Error)
}
}
return nil
})
if err != nil {
return err
}
numDeleted, err := db.DeleteMessagesFromBackend(ctx, userID, request.Messages.Ids)
if err != nil {
return fmt.Errorf("db.DeleteMessagesFromBackend: %w", err)
}
fmt.Printf("addDeletionRequestHandler: Deleted %d rows in the backend\n", numDeleted)
return nil
}
func (db *DB) FeedbackCreate(ctx context.Context, feedback *shared.Feedback) error {
tx := db.WithContext(ctx).Create(feedback)
if tx.Error != nil {
return fmt.Errorf("tx.Error: %w", tx.Error)
}
return nil
}
func (db *DB) Clean(ctx context.Context) error {
r := db.WithContext(ctx).Exec("DELETE FROM enc_history_entries WHERE read_count > 10")
if r.Error != nil {
return r.Error
}
r = db.WithContext(ctx).Exec("DELETE FROM deletion_requests WHERE read_count > 100")
if r.Error != nil {
return r.Error
}
return nil
}
func extractInt64FromRow(row *sql.Row) (int64, error) {
var ret int64
err := row.Scan(&ret)
if err != nil {
return 0, fmt.Errorf("extractInt64FromRow: %w", err)
}
return ret, nil
}
type ActiveUserStats struct {
Date time.Time
TotalNumDevices int64
TotalNumUsers int64
DailyActiveSubmitUsers int64
DailyActiveQueryUsers int64
WeeklyActiveSubmitUsers int64
WeeklyActiveQueryUsers int64
DailyInstalls int64
DailyUninstalls int64
}
func (db *DB) GenerateAndStoreActiveUserStats(ctx context.Context) error {
if db.DB.Name() == "sqlite" {
// Not supported on sqlite
return nil
}
totalNumDevices, err := extractInt64FromRow(db.WithContext(ctx).Raw("SELECT COUNT(DISTINCT devices.device_id) FROM devices WHERE NOT is_integration_test_device").Row())
if err != nil {
return err
}
totalNumUsers, err := extractInt64FromRow(db.WithContext(ctx).Raw("SELECT COUNT(DISTINCT devices.user_id) FROM devices WHERE NOT is_integration_test_device").Row())
if err != nil {
return err
}
dauSubmit, err := extractInt64FromRow(db.WithContext(ctx).Raw("SELECT COUNT(DISTINCT user_id) FROM usage_data WHERE last_used > (now()::date-1)::timestamp AND device_id NOT IN (SELECT device_id FROM devices WHERE is_integration_test_device)").Row())
if err != nil {
return err
}
dauQuery, err := extractInt64FromRow(db.WithContext(ctx).Raw("SELECT COUNT(DISTINCT user_id) FROM usage_data WHERE last_queried > (now()::date-1)::timestamp AND device_id NOT IN (SELECT device_id FROM devices WHERE is_integration_test_device)").Row())
if err != nil {
return err
}
wauSubmit, err := extractInt64FromRow(db.WithContext(ctx).Raw("SELECT COUNT(DISTINCT user_id) FROM usage_data WHERE last_used > (now()::date-7)::timestamp AND device_id NOT IN (SELECT device_id FROM devices WHERE is_integration_test_device)").Row())
if err != nil {
return err
}
wauQuery, err := extractInt64FromRow(db.WithContext(ctx).Raw("SELECT COUNT(DISTINCT user_id) FROM usage_data WHERE last_queried > (now()::date-7)::timestamp AND device_id NOT IN (SELECT device_id FROM devices WHERE is_integration_test_device)").Row())
if err != nil {
return err
}
dailyInstalls, err := extractInt64FromRow(db.WithContext(ctx).Raw("SELECT count(distinct device_id) FROM devices WHERE registration_date > (now()::date-1)::timestamp AND NOT is_integration_test_device").Row())
if err != nil {
return err
}
dailyUninstalls, err := extractInt64FromRow(db.WithContext(ctx).Raw("SELECT COUNT(*) FROM feedbacks WHERE date > (now()::date-1)::timestamp").Row())
if err != nil {
return err
}
return db.Create(ActiveUserStats{
Date: time.Now(),
TotalNumDevices: totalNumDevices,
TotalNumUsers: totalNumUsers,
DailyActiveSubmitUsers: dauSubmit,
DailyActiveQueryUsers: dauQuery,
WeeklyActiveSubmitUsers: wauSubmit,
WeeklyActiveQueryUsers: wauQuery,
DailyInstalls: dailyInstalls,
DailyUninstalls: dailyUninstalls,
}).Error
}
func (db *DB) DeepClean(ctx context.Context) error {
return db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
r := tx.Exec(`
CREATE TEMP TABLE temp_users_with_one_device AS (
SELECT user_id
FROM devices
GROUP BY user_id
HAVING COUNT(DISTINCT device_id) > 1
)
`)
if r.Error != nil {
return r.Error
}
r = tx.Exec(`
CREATE TEMP TABLE temp_inactive_users AS (
SELECT user_id
FROM usage_data
WHERE last_used <= (now() - INTERVAL '90 days')
)
`)
if r.Error != nil {
return r.Error
}
r = tx.Exec(`
SELECT COUNT(*) FROM enc_history_entries WHERE
date <= (now() - INTERVAL '90 days')
AND user_id IN (SELECT * FROM temp_users_with_one_device)
AND user_id IN (SELECT * FROM temp_inactive_users)
`)
if r.Error != nil {
return r.Error
}
fmt.Printf("Ran deep clean and deleted %d rows\n", r.RowsAffected)
return nil
})
}