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db.go
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db.go
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// Copyright 2024 The Mothership Authors
// SPDX-License-Identifier: Apache-2.0
package base
import (
"context"
"errors"
"fmt"
orderedmap "github.com/wk8/go-ordered-map/v2"
"go.ciq.dev/pika"
"math/rand"
)
type Pika[T any] interface {
pika.QuerySet[T]
U(x any) error
F(keyval ...any) Pika[T]
D(x any) error
Transaction(ctx context.Context) (Pika[T], error)
Commit() error
}
type DB struct {
*pika.PostgreSQL
}
type innerDB[T any] struct {
pika.QuerySet[T]
*DB
}
type nameInterface interface {
GetID() string
}
func NewDB(databaseURL string) (*DB, error) {
db, err := pika.NewPostgreSQL(databaseURL)
if err != nil {
return nil, err
}
return &DB{db}, nil
}
func NewDBArgs(keyval ...any) *orderedmap.OrderedMap[string, any] {
args := pika.NewArgs()
for i := 0; i < len(keyval); i += 2 {
args.Set(keyval[i].(string), keyval[i+1])
}
return args
}
func NameGen(prefix string) string {
// last part is a random int64
// generate a length=18 random int
minRan := 100000000000000000
maxRan := 999999999999999999
ran := minRan + rand.Intn(maxRan-minRan)
return fmt.Sprintf("%s/%d", prefix, ran)
}
//goland:noinspection GoExportedFuncWithUnexportedType
func Q[T any](db *DB) Pika[T] {
return &innerDB[T]{pika.Q[T](db.PostgreSQL), db}
}
func (inner *innerDB[T]) F(keyval ...any) Pika[T] {
var qs pika.QuerySet[T] = inner
args := pika.NewArgs()
for i := 0; i < len(keyval); i += 2 {
args.Set(keyval[i].(string), keyval[i+1])
qs = qs.Filter(fmt.Sprintf("%s=:%s", keyval[i].(string), keyval[i].(string)))
}
inner.QuerySet = qs.Args(args)
return inner
}
func (inner *innerDB[T]) D(x any) error {
// Check if x has GetID() method
var id any
name, ok := x.(nameInterface)
if ok {
stringID := name.GetID()
if stringID == "" {
return fmt.Errorf("id is empty")
}
id = stringID
}
if id == nil {
return errors.New("id is nil")
}
qs := inner.F("name", id)
return qs.Delete()
}
func (inner *innerDB[T]) Transaction(ctx context.Context) (Pika[T], error) {
innerDeref := *inner
ts := &innerDeref
err := ts.Begin(ctx)
if err != nil {
return nil, err
}
return &innerDB[T]{pika.Q[T](ts), inner.DB}, nil
}
func (inner *innerDB[T]) Commit() error {
return inner.DB.Commit()
}
func (inner *innerDB[T]) U(x any) error {
y := x.(*T)
// Check if x has GetID() method
var id any
name, ok := x.(nameInterface)
if ok {
stringID := name.GetID()
if stringID == "" {
return fmt.Errorf("id is empty")
}
id = stringID
}
if id == nil {
return fmt.Errorf("id is nil")
}
qs := inner.F("name", id)
return qs.Update(y)
}
func (inner *innerDB[T]) Create(x *T) error {
ctx := context.TODO()
ts := pika.NewPostgreSQLFromDB(inner.DB.DB())
err := ts.Begin(ctx)
if err != nil {
return err
}
if err != nil {
return err
}
var y any = x
err = pika.Q[T](ts).Create(x)
if err != nil {
return err
}
var nameID string
name, ok := y.(nameInterface)
if ok {
stringID := name.GetID()
if stringID == "" {
return fmt.Errorf("id is empty")
}
nameID = stringID
}
if nameID == "" {
return errors.New("id is empty")
}
args := pika.NewArgs()
args.Set("name", nameID)
newX, err := pika.Q[T](ts).Filter("name=:name").Args(args).Get()
if err != nil {
return err
}
err = ts.Commit()
if err != nil {
return err
}
*x = *newX
return nil
}