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adm.go
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adm.go
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package helper
import (
"database/sql"
"log"
"math/rand"
"time"
"github.com/sevings/mindwell-server/utils"
)
type user struct {
email string
name string
gender string
at time.Time // used in mailing
}
func genderNames(tx *utils.AutoTx) [][]string {
names := make([][]string, 3)
tx.Query("SELECT users.name, users.gender FROM users, adm " +
"WHERE lower(adm.name) = lower(users.name)")
for {
var name string
var gender int64
ok := tx.Scan(&name, &gender)
if !ok {
break
}
names[gender] = append(names[gender], name)
}
return names
}
func loadIgnored(genderNames [][]string, tx *utils.AutoTx) map[string][]string {
const q = `
SELECT t.name
FROM relations
JOIN relation ON relations.type = relation.id
JOIN users AS f ON relations.from_id = f.id
JOIN users AS t ON relations.to_id = t.id
WHERE lower(f.name) = lower($1)
AND relation.type = 'ignored'
`
ignored := map[string][]string{}
for _, names := range genderNames {
for _, from := range names {
tx.Query(q, from)
for {
var to string
ok := tx.Scan(&to)
if !ok {
break
}
ignored[from] = append(ignored[from], to)
ignored[to] = append(ignored[to], from)
}
}
}
return ignored
}
func mixNames(names [][]string, ignored map[string][]string) []string {
cnt := len(names[0]) + len(names[1]) + len(names[2])
log.Printf("Found %d adms...\n", cnt)
adm := make([]string, cnt+1)
remix:
for {
i := 0
for j := 0; j <= 2; j++ {
curNames := make([]string, len(names[j]))
copy(curNames, names[j])
for ; len(curNames) > 0; i += 2 {
if i >= cnt {
i = 1
}
adm[i], curNames = takeRandom(curNames)
}
}
adm[cnt] = adm[0]
for j := 0; j < len(adm)-1; j++ {
gs := adm[j]
gf := adm[j+1]
ign := ignored[gs]
for _, name := range ign {
if name == gf {
log.Printf("Found ignoring pair: %s, %s. Remixing.", gs, gf)
continue remix
}
}
}
break
}
return adm
}
func setAdm(adm []string, tx *utils.AutoTx) {
for i := 0; i < len(adm)-1; i++ {
gs := adm[i]
gf := adm[i+1]
tx.Exec("UPDATE adm SET grandfather = $2 WHERE lower(name) = lower($1)", gs, gf)
rows := tx.RowsAffected()
if rows != 1 {
log.Printf("Couldn't set grandfather for %s\n", gs)
}
}
}
func loadUsers(adm []string, tx *utils.AutoTx) []user {
var users []user
for _, name := range adm {
tx.Query("SELECT show_name, gender.type, email, verified FROM users, gender "+
"WHERE lower(name) = lower($1) AND users.gender = gender.id", name)
for {
var verified bool
var usr user
ok := tx.Scan(&usr.name, &usr.gender, &usr.email, &verified)
if !ok {
break
}
if verified {
users = append(users, usr)
}
}
}
return users
}
func takeRandom(s []string) (string, []string) {
var result string
i := rand.Intn(len(s))
result, s[i] = s[i], s[len(s)-1]
return result, s[:len(s)-1]
}
func UpdateAdm(tx *utils.AutoTx, mail *utils.Postman) {
rand.Seed(time.Now().UTC().UnixNano())
names := genderNames(tx)
if tx.Error() != nil && tx.Error() != sql.ErrNoRows {
return
}
ignored := loadIgnored(names, tx)
if tx.Error() != nil && tx.Error() != sql.ErrNoRows {
return
}
adm := mixNames(names, ignored)
setAdm(adm, tx)
if tx.Error() != nil {
return
}
users := loadUsers(adm[:len(adm)-1], tx)
if tx.Error() != nil && tx.Error() != sql.ErrNoRows {
return
}
for _, usr := range users {
mail.SendAdm(usr.email, usr.name, usr.gender)
}
log.Println("Completed. Sending emails...")
}