/
packages.go
225 lines (209 loc) · 6.96 KB
/
packages.go
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package repo
import (
"context"
"errors"
"fmt"
"github.com/jackc/pgx/v5"
"github.com/jackc/pgx/v5/pgxpool"
"github.com/kozalosev/goSadTgBot/base"
"github.com/kozalosev/goSadTgBot/logconst"
log "github.com/sirupsen/logrus"
"github.com/thoas/go-funk"
"strings"
)
var NoRowsWereAffected = errors.New("no rows were affected")
// PackageService is a CRUD service for the Package entity.
// It's also responsible for installation of packages.
// https://github.com/kozalosev/SadFavBot/wiki/Glossary#package
type PackageService struct {
ctx context.Context
db *pgxpool.Pool
}
func NewPackageService(appenv *base.ApplicationEnv) *PackageService {
return &PackageService{
ctx: appenv.Ctx,
db: appenv.Database,
}
}
// ResolveName fetches the name of a package by its unique_id.
func (service *PackageService) ResolveName(uuid string) (string, error) {
var (
uid int
name string
)
q := "SELECT owner_uid, name FROM packages WHERE unique_id = $1"
err := service.db.QueryRow(service.ctx, q, uuid).Scan(&uid, &name)
return fmt.Sprintf("%d@%s", uid, name), err
}
// ListWithCounts prints the list of saved packages of some user in the format:
//
// package (1)
//
// where '1' is the count of aliases associated with 'package'
func (service *PackageService) ListWithCounts(uid int64, lastPackage string) (*Page, error) {
q := "SELECT p.name, count(pa.alias_id) FROM packages p " +
"JOIN package_aliases pa ON p.id = pa.package_id " +
"WHERE p.owner_uid = $1 AND p.name > $2 " +
"GROUP BY p.name ORDER BY p.name LIMIT $3"
if rows, err := service.db.Query(service.ctx, q, uid, lastPackage, ResultsPerPage+1); err == nil {
var (
packages []string
pkg string
count int
)
for rows.Next() {
if err = rows.Scan(&pkg, &count); err == nil {
packages = append(packages, fmt.Sprintf("%s (%d)", pkg, count))
} else {
log.WithField(logconst.FieldService, "PackageService").
WithField(logconst.FieldMethod, "ListWithCounts").
WithField(logconst.FieldCalledObject, "Rows").
WithField(logconst.FieldCalledMethod, "Scan").
Error(err)
}
}
lines := funk.Map(packages, func(s string) string {
return FormatPackageName(uid, s)
}).([]string)
if len(lines) > ResultsPerPage {
return &Page{
Items: lines[:ResultsPerPage],
HasNextPage: true,
ofPackages: true,
}, rows.Err()
} else {
return &Page{
Items: lines,
HasNextPage: false,
ofPackages: true,
}, rows.Err()
}
} else {
return nil, err
}
}
// ListAliases returns the list of aliases in the package.
func (service *PackageService) ListAliases(pkgInfo *PackageInfo) (items []string, err error) {
var res pgx.Rows
q := "SELECT a.name FROM package_aliases pa JOIN packages p ON p.id = pa.package_id JOIN aliases a ON pa.alias_id = a.id WHERE p.owner_uid = $1 AND p.name = $2"
if res, err = service.db.Query(service.ctx, q, pkgInfo.UID, pkgInfo.Name); err == nil {
var item string
for res.Next() {
if err := res.Scan(&item); err == nil {
items = append(items, item)
} else {
log.WithField(logconst.FieldService, "PackageService").
WithField(logconst.FieldMethod, "ListAliases").
WithField(logconst.FieldCalledObject, "Rows").
WithField(logconst.FieldCalledMethod, "Scan").
Error(err)
}
}
err = res.Err()
}
return
}
// Exists returns true if the package exists in the database.
func (service *PackageService) Exists(pkgInfo *PackageInfo) (exists bool, err error) {
q := "SELECT exists(SELECT 1 FROM Packages WHERE owner_uid = $1 AND name = $2)"
err = service.db.QueryRow(service.ctx, q, pkgInfo.UID, pkgInfo.Name).Scan(&exists)
return
}
// FindByAliases returns the list of all user's packages associated with the given aliases.
func (service *PackageService) FindByAliases(uid int64, aliases []string) (packageNames []string, err error) {
q := "SELECT DISTINCT p.name FROM package_aliases pa JOIN packages p ON pa.package_id = p.id JOIN aliases a ON pa.alias_id = a.id WHERE owner_uid = $1 AND a.name = ANY($2)"
rows, err := service.db.Query(service.ctx, q, uid, aliases)
if err == nil {
for rows.Next() {
var packageName string
if err := rows.Scan(&packageName); err == nil {
packageNames = append(packageNames, packageName)
} else {
log.WithField(logconst.FieldService, "PackageService").
WithField(logconst.FieldMethod, "FindByAlias").
WithField(logconst.FieldCalledObject, "Rows").
WithField(logconst.FieldCalledMethod, "Scan").
Error(err)
}
}
}
return
}
// Create a new package.
func (service *PackageService) Create(uid int64, name string, aliases []string) (string, error) {
var (
packID string
tx pgx.Tx
err error
)
if tx, err = service.db.Begin(service.ctx); err == nil {
if packID, err = service.createPackage(tx, uid, name, aliases); err == nil {
err = tx.Commit(service.ctx)
}
}
return packID, err
}
// Delete some package.
func (service *PackageService) Delete(uid int64, name string) error {
res, err := service.db.Exec(service.ctx, "DELETE FROM packages WHERE owner_uid = $1 AND name = $2", uid, name)
if err != nil {
return err
}
if res.RowsAffected() < 1 {
return NoRowsWereAffected
}
return nil
}
// Recreate is a combination of Delete and Create executing in one transaction.
func (service *PackageService) Recreate(uid int64, name string, aliases []string) (string, error) {
var (
packID string
tx pgx.Tx
err error
)
if tx, err = service.db.Begin(service.ctx); err == nil {
if err = service.Delete(uid, name); err == nil {
if packID, err = service.createPackage(tx, uid, name, aliases); err == nil {
err = tx.Commit(service.ctx)
}
}
}
return packID, err
}
func (service *PackageService) createPackage(tx pgx.Tx, uid int64, name string, aliases []string) (string, error) {
var (
packID int
packUUID string
res pgx.Rows
err error
)
if err = tx.QueryRow(service.ctx, "INSERT INTO packages(owner_uid, name) VALUES ($1, $2) RETURNING id, unique_id", uid, name).Scan(&packID, &packUUID); err == nil {
aliases = funk.Map(aliases, func(a string) string {
return strings.Replace(a, "'", "''", -1)
}).([]string)
if res, err = service.db.Query(service.ctx, fmt.Sprintf("SELECT id FROM aliases WHERE name IN ('%s')", strings.Join(aliases, "', '"))); err == nil {
var (
aliasID int
b pgx.Batch
)
for res.Next() {
if err = res.Scan(&aliasID); err == nil {
b.Queue("INSERT INTO package_aliases(package_id, alias_id) VALUES ($1, $2) ON CONFLICT DO NOTHING", packID, aliasID)
} else {
log.WithField(logconst.FieldService, "PackageService").
WithField(logconst.FieldMethod, "createPackage").
WithField(logconst.FieldCalledObject, "Rows").
WithField(logconst.FieldCalledMethod, "Scan").
Error(err)
}
}
batchRes := tx.SendBatch(service.ctx, &b)
err = batchRes.Close()
}
}
return packUUID, err
}
// FormatPackageName returns the full name of the package.
func FormatPackageName(uid int64, name string) string {
return fmt.Sprintf("%d@%s", uid, name)
}