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roti.go
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roti.go
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package model
import (
"database/sql"
"errors"
"fmt"
"math"
"math/rand"
"strconv"
"time"
"github.com/rs/zerolog/log"
)
var (
ErrInvalidROTIID = errors.New("invalid ROTI ID")
)
type ROTIEntity struct {
id ROTIID
description string
hide bool
feedback bool
}
type ROTIID int
type ShortROTIInfo struct {
ID ROTIID
Desc string
}
func (id ROTIID) Int() int {
return int(id)
}
func NewROTIID() (rotiID ROTIID) {
//Use a trivial seed as there is no real cryptographic work here
r := rand.New(rand.NewSource(time.Now().UnixNano()))
min := 10000
max := 99999
rotiID = ROTIID(r.Intn(max-min+1) + min)
return
}
func NewROTIEntity(id ROTIID, description string, hide, feedback bool) (roti ROTIEntity) {
roti.id = id
roti.description = description
roti.hide = hide
roti.feedback = feedback
return
}
func GetROTI(rotiid ROTIID) (roti ROTIEntity, err error) {
var description string
var hide, feedback bool
row, err := sqliteDatabase.Query("SELECT description,hide,feedback FROM roti WHERE rotiid =" + strconv.Itoa(int(rotiid)))
if err != nil {
log.Fatal().Msgf(err.Error())
}
defer row.Close()
row.Next()
err = row.Scan(&description, &hide, &feedback)
if err != nil {
return ROTIEntity{}, err
}
return NewROTIEntity(rotiid, description, hide, feedback), nil
}
func insertROTI(db *sql.DB, roti ROTIEntity) {
id := int(roti.GetID())
log.Info().Msgf("inserting ROTI record %d (%s) hidden:%t feedback:%t", id, roti.description, roti.hide, roti.feedback)
insertROTISQL := `INSERT INTO ROTI(rotiid, description, hide, feedback) VALUES (?, ?, ?, ?)`
statement, err := db.Prepare(insertROTISQL)
if err != nil {
log.Fatal().Msgf(err.Error())
}
_, err = statement.Exec(id, roti.description, roti.hide, roti.feedback)
if err != nil {
log.Fatal().Msgf(err.Error())
}
}
func CreateROTI(description string, hide, feedback bool, clean int) (rotiID ROTIID) {
// before doing anything, run a check to see if we can clean some old ROTIs
log.Info().Msgf("searching for opportunistic cleaning on the ROTI database")
cleanOldROTIs(sqliteDatabase, clean)
// create a new ID, hope it's free
rotiID = NewROTIID()
roti, _ := GetROTI(rotiID)
// if roti is nil, it means this rotiID is free
// if not, we loop and try again
loop := 0
for roti != (ROTIEntity{}) && loop < 1000 {
// iterate until we find a free ID
rotiID = NewROTIID()
roti, _ = GetROTI(rotiID)
loop++
}
if loop == 1000 {
//we couldn't find a free ID after 1000 tries
panic(ErrNoFreeIDs)
}
insertROTI(sqliteDatabase, NewROTIEntity(rotiID, description, hide, feedback))
return
}
func cleanOldROTIs(db *sql.DB, clean int) {
// Generate a time.Time from the clean_over_time parameter
cleanOverTime := time.Now().AddDate(0, 0, -clean)
// Retrieve ROTIs older than 30 days
rows, err := db.Query("SELECT id,rotiid FROM roti WHERE created_at < ?", cleanOverTime)
if err != nil {
log.Error().Msgf("error retrieving old ROTIs: %s", err.Error())
return
}
defer rows.Close()
var rotiIDs []struct {
id int
rotiid int
}
for rows.Next() {
var id int
var rotiid int
if err := rows.Scan(&id, &rotiid); err != nil {
log.Error().Msgf("Error scanning ROTI row: %s", err.Error())
continue
}
currentROTI := struct {
id int
rotiid int
}{
id: id,
rotiid: rotiid,
}
rotiIDs = append(rotiIDs, currentROTI)
}
if err := rows.Err(); err != nil {
log.Error().Msgf("error iterating through ROTI rows: %s", err.Error())
return
}
// Delete associated votes
for _, rotiID := range rotiIDs {
_, err := db.Exec("DELETE FROM vote WHERE roti = ?", rotiID.id)
if err != nil {
log.Error().Msgf("error deleting votes for ROTI ID %d/%d: %s", rotiID.rotiid, rotiID.id, err.Error())
continue
}
log.Info().Msgf("votes deleted for ROTI ID %d/%d", rotiID.rotiid, rotiID.id)
}
// Delete old ROTIs
_, err = db.Exec("DELETE FROM roti WHERE created_at < ?", cleanOverTime)
if err != nil {
log.Error().Msgf("error cleaning old ROTIs: %s", err.Error())
return
}
log.Info().Msgf("old ROTIs cleaned up successfully")
}
func ListROTIs() (rotis []ShortROTIInfo) {
row, err := sqliteDatabase.Query("SELECT rotiid,description FROM roti WHERE hide = FALSE ORDER BY id DESC LIMIT 10;")
if err != nil {
log.Fatal().Msgf(err.Error())
}
defer row.Close()
for row.Next() {
var rotiid int
var description string
err := row.Scan(&rotiid, &description)
if err != nil {
log.Fatal().Msgf(err.Error())
}
shortInfo := ShortROTIInfo{ID: ROTIID(rotiid), Desc: description}
rotis = append(rotis, shortInfo)
}
return
}
func CountROTIs() int {
var count int
err := sqliteDatabase.QueryRow("SELECT COUNT(*) FROM roti").Scan(&count)
if err != nil {
log.Fatal().Msgf(err.Error())
}
return count
}
func GetMaxROTIID() int {
// Use sql.NullInt64 to handle NULL values
var maxID sql.NullInt64
err := sqliteDatabase.QueryRow("SELECT MAX(id) FROM roti").Scan(&maxID)
if err != nil {
log.Fatal().Msgf(err.Error())
}
if maxID.Valid {
return int(maxID.Int64)
} else {
// Handle case where there are no rows in roti
return 0
}
}
func (currentROTI *ROTIEntity) GetID() ROTIID {
return currentROTI.id
}
func (currentROTI *ROTIEntity) GetDescription() string {
return currentROTI.description
}
func (currentROTI *ROTIEntity) IsHidden() bool {
return currentROTI.hide
}
func (currentROTI *ROTIEntity) HasFeedback() bool {
return currentROTI.feedback
}
func (currentROTI *ROTIEntity) AddVoteToROTI(value float64, feedback string) (err error) {
currentVote, err := NewVoteEntity(value)
if err != nil {
return fmt.Errorf("%w: %s", ErrInvalidVoteID, err)
}
insertVote(sqliteDatabase, currentVote, currentROTI.id, feedback)
return nil
}
func (currentROTI *ROTIEntity) CountVotes() int {
row, err := sqliteDatabase.Query("SELECT COUNT(*) FROM vote WHERE roti =" + strconv.Itoa(int(currentROTI.id)))
if err != nil {
log.Fatal().Msgf("couldn't connect to database")
}
defer row.Close()
var count int
for row.Next() {
if err := row.Scan(&count); err != nil {
log.Error().Msgf("couldn't scan values : %s", err.Error())
}
}
return count
}
func (currentROTI *ROTIEntity) GetMinVote() float64 {
var min sql.NullFloat64
row, err := sqliteDatabase.Query("SELECT MIN(value) FROM vote WHERE roti =" + strconv.Itoa(int(currentROTI.id)))
if err != nil {
log.Fatal().Msgf("couldn't connect to database")
}
defer row.Close()
for row.Next() {
if err := row.Scan(&min); err != nil {
log.Error().Msgf("couldn't scan values : %s", err.Error())
}
}
return min.Float64
}
func (currentROTI *ROTIEntity) GetMaxVote() float64 {
var max sql.NullFloat64
row, err := sqliteDatabase.Query("SELECT MAX(value) FROM vote WHERE roti =" + strconv.Itoa(int(currentROTI.id)))
if err != nil {
log.Fatal().Msgf("couldn't connect to database")
}
defer row.Close()
for row.Next() {
if err := row.Scan(&max); err != nil {
log.Error().Msgf("couldn't scan values : %s", err.Error())
}
}
return max.Float64
}
func (currentROTI *ROTIEntity) VotesAverage() float64 {
var avg sql.NullFloat64
row, err := sqliteDatabase.Query("SELECT AVG(value) FROM vote WHERE roti =" + strconv.Itoa(int(currentROTI.id)))
if err != nil {
log.Fatal().Msgf("couldn't connect to database")
}
defer row.Close()
for row.Next() {
if err := row.Scan(&avg); err != nil {
log.Error().Msgf("couldn't scan values : %s", err.Error())
}
}
return math.Ceil(avg.Float64*100) / 100
}
func (currentROTI *ROTIEntity) ListFeedbacks() (feedbacks []string) {
var feedback string
var value float32
row, err := sqliteDatabase.Query("SELECT value, feedback FROM vote WHERE roti =" + strconv.Itoa(int(currentROTI.id)))
if err != nil {
log.Fatal().Msgf("couldn't connect to database")
}
defer row.Close()
for row.Next() {
if err := row.Scan(&value, &feedback); err != nil {
log.Error().Msgf("couldn't scan values : %s", err.Error())
}
if feedback != "" {
feedbacks = append(feedbacks, fmt.Sprintf("(%.1f) %s", value, feedback))
}
}
return
}