Pronoun card website and API https://pronouns.cc
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pronouns.cc/backend/db/db.go

136 lines
3.0 KiB

package db
import (
"context"
"encoding/json"
"fmt"
"os"
"emperror.dev/errors"
"github.com/Masterminds/squirrel"
"github.com/jackc/pgx/v4/pgxpool"
"github.com/mediocregopher/radix/v4"
"github.com/minio/minio-go/v7"
"github.com/minio/minio-go/v7/pkg/credentials"
)
var sq = squirrel.StatementBuilder.PlaceholderFormat(squirrel.Dollar)
const ErrNothingToUpdate = errors.Sentinel("nothing to update")
type DB struct {
*pgxpool.Pool
Redis radix.Client
minio *minio.Client
minioBucket string
}
func New() (*DB, error) {
pool, err := pgxpool.Connect(context.Background(), os.Getenv("DATABASE_URL"))
if err != nil {
return nil, errors.Wrap(err, "creating postgres client")
}
redis, err := (&radix.PoolConfig{}).New(context.Background(), "tcp", os.Getenv("REDIS"))
if err != nil {
return nil, errors.Wrap(err, "creating redis client")
}
minioClient, err := minio.New(os.Getenv("MINIO_ENDPOINT"), &minio.Options{
Creds: credentials.NewStaticV4(os.Getenv("MINIO_ACCESS_KEY_ID"), os.Getenv("MINIO_ACCESS_KEY_SECRET"), ""),
Secure: os.Getenv("MINIO_SSL") == "true",
})
if err != nil {
return nil, errors.Wrap(err, "creating minio client")
}
db := &DB{
Pool: pool,
Redis: redis,
minio: minioClient,
minioBucket: os.Getenv("MINIO_BUCKET"),
}
return db, nil
}
// MultiCmd executes the given Redis commands in order.
// If any return an error, the function is aborted.
func (db *DB) MultiCmd(ctx context.Context, cmds ...radix.Action) error {
for _, cmd := range cmds {
err := db.Redis.Do(ctx, cmd)
if err != nil {
return err
}
}
return nil
}
// SetJSON sets the given key to v marshaled as JSON.
func (db *DB) SetJSON(ctx context.Context, key string, v any, args ...string) error {
b, err := json.Marshal(v)
if err != nil {
return errors.Wrap(err, "marshaling json")
}
cmdArgs := make([]string, 0, len(args)+2)
cmdArgs = append(cmdArgs, key, string(b))
cmdArgs = append(cmdArgs, args...)
err = db.Redis.Do(ctx, radix.Cmd(nil, "SET", cmdArgs...))
if err != nil {
return errors.Wrap(err, "writing to Redis")
}
return nil
}
// GetJSON gets the given key as a JSON object.
func (db *DB) GetJSON(ctx context.Context, key string, v any) error {
var b []byte
err := db.Redis.Do(ctx, radix.Cmd(&b, "GET", key))
if err != nil {
return errors.Wrap(err, "reading from Redis")
}
if b == nil {
return nil
}
if v == nil {
return fmt.Errorf("nil pointer passed into GetJSON")
}
err = json.Unmarshal(b, v)
if err != nil {
return errors.Wrap(err, "unmarshaling json")
}
return nil
}
// GetDelJSON gets the given key as a JSON object and deletes it.
func (db *DB) GetDelJSON(ctx context.Context, key string, v any) error {
var b []byte
err := db.Redis.Do(ctx, radix.Cmd(&b, "GETDEL", key))
if err != nil {
return errors.Wrap(err, "reading from Redis")
}
if b == nil {
return nil
}
if v == nil {
return fmt.Errorf("nil pointer passed into GetDelJSON")
}
err = json.Unmarshal(b, v)
if err != nil {
return errors.Wrap(err, "unmarshaling json")
}
return nil
}