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fix_usernames.go
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fix_usernames.go
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package main
import (
"context"
"fmt"
"math"
"strings"
"sync"
"time"
"github.com/DevAlone/parse_pikabu/core/logger"
"github.com/DevAlone/parse_pikabu/helpers"
"github.com/DevAlone/parse_pikabu/models"
"github.com/go-pg/pg"
"golang.org/x/sync/semaphore"
)
var startTimestamp = time.Now().Unix()
func printTimeSinceStart() {
fmt.Printf("time since start: %v\n", (time.Now().Unix() - startTimestamp))
}
func fixUsernames() {
logger.Log.Debug("load_from_old_db started")
fmt.Println("fixing usernames...")
printTimeSinceStart()
err := models.InitDb()
if err != nil {
helpers.PanicOnError(err)
}
fmt.Println("processing users...")
printTimeSinceStart()
var (
maxWorkers = 64 // 128
sem = semaphore.NewWeighted(int64(maxWorkers))
)
ctx := context.TODO()
var wg sync.WaitGroup
offset := 0
limit := 1024 * 4
for true {
fmt.Printf("processing users, offset=%v, limit=%v\n", offset, limit)
printTimeSinceStart()
var users []models.PikabuUser
err := models.Db.Model(&users).
Where("pikabu_id > ?", offset).
Order("pikabu_id").
Limit(limit).
Select()
if err == pg.ErrNoRows || len(users) == 0 {
break
}
helpers.PanicOnError(err)
for _, user := range users {
offset = int(math.Max(float64(offset), float64(user.PikabuID)))
helpers.PanicOnError(sem.Acquire(ctx, 1))
wg.Add(1)
go func(u models.PikabuUser) {
defer sem.Release(1)
fixUsernameProcessUser(&u)
wg.Done()
}(user)
}
}
wg.Wait()
}
func fixUsernameProcessUser(user *models.PikabuUser) {
var usernameVersions []models.PikabuUserUsernameVersion
err := models.Db.Model(&usernameVersions).
Where("item_id = ?", user.PikabuID).
Order("timestamp").
Select()
helpers.PanicOnError(err)
for i, usernameVersion := range usernameVersions {
// delete versions
deleteVersions(usernameVersion.ItemId, usernameVersion.Timestamp)
if i == 0 {
continue
}
previousVersion := usernameVersions[i-1]
deleteVersions(previousVersion.ItemId, previousVersion.Timestamp)
if strings.ToLower(previousVersion.Value) == strings.ToLower(usernameVersion.Value) { // &&
// previousVersion.Value != usernameVersion.Value {
fmt.Printf("prev version %v curr version %v\n", previousVersion, usernameVersion)
previousVersion.Value = usernameVersion.Value
err := models.Db.Update(&previousVersion)
helpers.PanicOnError(err)
err = models.Db.Delete(&usernameVersion)
usernameVersions[i] = previousVersion
helpers.PanicOnError(err)
}
}
}
func deleteVersions(itemId uint64, timestamp models.TimestampType) {
deleteVersionsTable(&models.PikabuUserRatingVersion{}, itemId, timestamp)
deleteVersionsTable(&models.PikabuUserNumberOfSubscribersVersion{}, itemId, timestamp)
deleteVersionsTable(&models.PikabuUserNumberOfCommentsVersion{}, itemId, timestamp)
deleteVersionsTable(&models.PikabuUserNumberOfStoriesVersion{}, itemId, timestamp)
deleteVersionsTable(&models.PikabuUserNumberOfHotStoriesVersion{}, itemId, timestamp)
deleteVersionsTable(&models.PikabuUserNumberOfPlusesVersion{}, itemId, timestamp)
deleteVersionsTable(&models.PikabuUserNumberOfMinusesVersion{}, itemId, timestamp)
}
func deleteVersionsTable(table interface{}, itemId uint64, timestamp models.TimestampType) {
_, err := models.Db.Model(table).
Where("item_id = ? AND timestamp = ?", itemId, timestamp).
Delete()
helpers.PanicOnError(err)
}