SimpleCloudNotifier/server/db/meta.go

160 lines
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2022-11-24 12:53:27 +01:00
package db
import (
"context"
"errors"
"gogs.mikescher.com/BlackForestBytes/goext/langext"
)
func (db *Database) ReadSchema(ctx context.Context) (int, error) {
r1, err := db.db.QueryContext(ctx, "SELECT name FROM sqlite_master WHERE type='table' AND name='meta'")
if err != nil {
return 0, err
}
if !r1.Next() {
return 0, nil
}
r2, err := db.db.QueryContext(ctx, "SELECT value_int FROM meta WHERE meta_key='schema'")
if err != nil {
return 0, err
}
if !r2.Next() {
return 0, errors.New("no schema entry in meta table")
}
var dbschema int
err = r2.Scan(&dbschema)
if err != nil {
return 0, err
}
return dbschema, nil
}
func (db *Database) WriteMetaString(ctx context.Context, key string, value string) error {
_, err := db.db.ExecContext(ctx, "INSERT INTO meta (meta_key, value_txt) VALUES (?, ?) ON CONFLICT(meta_key) DO UPDATE SET value_txt = ?",
key,
value,
value)
if err != nil {
return err
}
return nil
}
func (db *Database) WriteMetaInt(ctx context.Context, key string, value int64) error {
_, err := db.db.ExecContext(ctx, "INSERT INTO meta (meta_key, value_int) VALUES (?, ?) ON CONFLICT(meta_key) DO UPDATE SET value_int = ?",
key,
value,
value)
if err != nil {
return err
}
return nil
}
func (db *Database) WriteMetaReal(ctx context.Context, key string, value float64) error {
_, err := db.db.ExecContext(ctx, "INSERT INTO meta (meta_key, value_real) VALUES (?, ?) ON CONFLICT(meta_key) DO UPDATE SET value_real = ?",
key,
value,
value)
if err != nil {
return err
}
return nil
}
func (db *Database) WriteMetaBlob(ctx context.Context, key string, value []byte) error {
_, err := db.db.ExecContext(ctx, "INSERT INTO meta (meta_key, value_blob) VALUES (?, ?) ON CONFLICT(meta_key) DO UPDATE SET value_blob = ?",
key,
value,
value)
if err != nil {
return err
}
return nil
}
func (db *Database) ReadMetaString(ctx context.Context, key string) (*string, error) {
r2, err := db.db.QueryContext(ctx, "SELECT value_txt FROM meta WHERE meta_key=?", key)
if err != nil {
return nil, err
}
if !r2.Next() {
return nil, errors.New("no matching entry in meta table")
}
var value string
err = r2.Scan(&value)
if err != nil {
return nil, err
}
return langext.Ptr(value), nil
}
func (db *Database) ReadMetaInt(ctx context.Context, key string) (*int64, error) {
r2, err := db.db.QueryContext(ctx, "SELECT value_int FROM meta WHERE meta_key=?", key)
if err != nil {
return nil, err
}
if !r2.Next() {
return nil, errors.New("no matching entry in meta table")
}
var value int64
err = r2.Scan(&value)
if err != nil {
return nil, err
}
return langext.Ptr(value), nil
}
func (db *Database) ReadMetaReal(ctx context.Context, key string) (*float64, error) {
r2, err := db.db.QueryContext(ctx, "SELECT value_real FROM meta WHERE meta_key=?", key)
if err != nil {
return nil, err
}
if !r2.Next() {
return nil, errors.New("no matching entry in meta table")
}
var value float64
err = r2.Scan(&value)
if err != nil {
return nil, err
}
return langext.Ptr(value), nil
}
func (db *Database) ReadMetaBlob(ctx context.Context, key string) (*[]byte, error) {
r2, err := db.db.QueryContext(ctx, "SELECT value_blob FROM meta WHERE meta_key=?", key)
if err != nil {
return nil, err
}
if !r2.Next() {
return nil, errors.New("no matching entry in meta table")
}
var value []byte
err = r2.Scan(&value)
if err != nil {
return nil, err
}
return langext.Ptr(value), nil
}
func (db *Database) DeleteMeta(ctx context.Context, key string) error {
_, err := db.db.ExecContext(ctx, "DELETE FROM meta WHERE meta_key = ?", key)
if err != nil {
return err
}
return nil
}