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db.go
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db.go
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// Copyright 2018-2021 CERN
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// In applying this license, CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
package localfs
import (
"context"
"database/sql"
"path"
"github.com/pkg/errors"
// Provides sqlite drivers
_ "github.com/mattn/go-sqlite3"
)
func initializeDB(root, dbName string) (*sql.DB, error) {
dbPath := path.Join(root, dbName)
db, err := sql.Open("sqlite3", dbPath)
if err != nil {
return nil, errors.Wrap(err, "localfs: error opening DB connection")
}
stmt, err := db.Prepare("CREATE TABLE IF NOT EXISTS recycled_entries (key TEXT PRIMARY KEY, path TEXT)")
if err != nil {
return nil, errors.Wrap(err, "localfs: error preparing statement")
}
_, err = stmt.Exec()
if err != nil {
return nil, errors.Wrap(err, "localfs: error executing create statement")
}
stmt, err = db.Prepare("CREATE TABLE IF NOT EXISTS user_interaction (resource TEXT, grantee TEXT, role TEXT DEFAULT '', favorite INTEGER DEFAULT 0, PRIMARY KEY (resource, grantee))")
if err != nil {
return nil, errors.Wrap(err, "localfs: error preparing statement")
}
_, err = stmt.Exec()
if err != nil {
return nil, errors.Wrap(err, "localfs: error executing create statement")
}
stmt, err = db.Prepare("CREATE TABLE IF NOT EXISTS metadata (resource TEXT, key TEXT, value TEXT, PRIMARY KEY (resource, key))")
if err != nil {
return nil, errors.Wrap(err, "localfs: error preparing statement")
}
_, err = stmt.Exec()
if err != nil {
return nil, errors.Wrap(err, "localfs: error executing create statement")
}
stmt, err = db.Prepare("CREATE TABLE IF NOT EXISTS share_references (resource TEXT PRIMARY KEY, target TEXT)")
if err != nil {
return nil, errors.Wrap(err, "localfs: error preparing statement")
}
_, err = stmt.Exec()
if err != nil {
return nil, errors.Wrap(err, "localfs: error executing create statement")
}
return db, nil
}
func (fs *localfs) addToRecycledDB(ctx context.Context, key, fileName string) error {
stmt, err := fs.db.Prepare("INSERT INTO recycled_entries VALUES (?, ?)")
if err != nil {
return errors.Wrap(err, "localfs: error preparing statement")
}
_, err = stmt.Exec(key, fileName)
if err != nil {
return errors.Wrap(err, "localfs: error executing insert statement")
}
return nil
}
func (fs *localfs) getRecycledEntry(ctx context.Context, key string) (string, error) {
var filePath string
err := fs.db.QueryRow("SELECT path FROM recycled_entries WHERE key=?", key).Scan(&filePath)
if err != nil {
return "", err
}
return filePath, nil
}
func (fs *localfs) removeFromRecycledDB(ctx context.Context, key string) error {
stmt, err := fs.db.Prepare("DELETE FROM recycled_entries WHERE key=?")
if err != nil {
return errors.Wrap(err, "localfs: error preparing statement")
}
_, err = stmt.Exec(key)
if err != nil {
return errors.Wrap(err, "localfs: error executing delete statement")
}
return nil
}
func (fs *localfs) addToACLDB(ctx context.Context, resource, grantee, role string) error {
stmt, err := fs.db.Prepare("INSERT INTO user_interaction (resource, grantee, role) VALUES (?, ?, ?) ON CONFLICT(resource, grantee) DO UPDATE SET role=?")
if err != nil {
return errors.Wrap(err, "localfs: error preparing statement")
}
_, err = stmt.Exec(resource, grantee, role, role)
if err != nil {
return errors.Wrap(err, "localfs: error executing insert statement")
}
return nil
}
func (fs *localfs) getACLs(ctx context.Context, resource string) (*sql.Rows, error) {
grants, err := fs.db.Query("SELECT grantee, role FROM user_interaction WHERE resource=?", resource)
if err != nil {
return nil, err
}
return grants, nil
}
func (fs *localfs) removeFromACLDB(ctx context.Context, resource, grantee string) error {
stmt, err := fs.db.Prepare("UPDATE user_interaction SET role='' WHERE resource=? AND grantee=?")
if err != nil {
return errors.Wrap(err, "localfs: error preparing statement")
}
_, err = stmt.Exec(resource, grantee)
if err != nil {
return errors.Wrap(err, "localfs: error executing delete statement")
}
return nil
}
func (fs *localfs) addToFavoritesDB(ctx context.Context, resource, grantee string) error {
stmt, err := fs.db.Prepare("INSERT INTO user_interaction (resource, grantee, favorite) VALUES (?, ?, 1) ON CONFLICT(resource, grantee) DO UPDATE SET favorite=1")
if err != nil {
return errors.Wrap(err, "localfs: error preparing statement")
}
_, err = stmt.Exec(resource, grantee)
if err != nil {
return errors.Wrap(err, "localfs: error executing insert statement")
}
return nil
}
func (fs *localfs) removeFromFavoritesDB(ctx context.Context, resource, grantee string) error {
stmt, err := fs.db.Prepare("UPDATE user_interaction SET favorite=0 WHERE resource=? AND grantee=?")
if err != nil {
return errors.Wrap(err, "localfs: error preparing statement")
}
_, err = stmt.Exec(resource, grantee)
if err != nil {
return errors.Wrap(err, "localfs: error executing delete statement")
}
return nil
}
func (fs *localfs) addToMetadataDB(ctx context.Context, resource, key, value string) error {
stmt, err := fs.db.Prepare("INSERT INTO metadata (resource, key, value) VALUES (?, ?, ?) ON CONFLICT(resource, key) DO UPDATE SET value=?")
if err != nil {
return errors.Wrap(err, "localfs: error preparing statement")
}
_, err = stmt.Exec(resource, key, value, value)
if err != nil {
return errors.Wrap(err, "localfs: error executing insert statement")
}
return nil
}
func (fs *localfs) removeFromMetadataDB(ctx context.Context, resource, key string) error {
stmt, err := fs.db.Prepare("DELETE FROM metadata WHERE resource=? AND key=?")
if err != nil {
return errors.Wrap(err, "localfs: error preparing statement")
}
_, err = stmt.Exec(resource, key)
if err != nil {
return errors.Wrap(err, "localfs: error executing delete statement")
}
return nil
}
func (fs *localfs) getMetadata(ctx context.Context, resource string) (*sql.Rows, error) {
grants, err := fs.db.Query("SELECT key, value FROM metadata WHERE resource=?", resource)
if err != nil {
return nil, err
}
return grants, nil
}
func (fs *localfs) addToReferencesDB(ctx context.Context, resource, target string) error {
stmt, err := fs.db.Prepare("INSERT INTO share_references (resource, target) VALUES (?, ?) ON CONFLICT(resource) DO UPDATE SET target=?")
if err != nil {
return errors.Wrap(err, "localfs: error preparing statement")
}
_, err = stmt.Exec(resource, target, target)
if err != nil {
return errors.Wrap(err, "localfs: error executing insert statement")
}
return nil
}
func (fs *localfs) getReferenceEntry(ctx context.Context, resource string) (string, error) {
var target string
err := fs.db.QueryRow("SELECT target FROM share_references WHERE resource=?", resource).Scan(&target)
if err != nil {
return "", err
}
return target, nil
}
func (fs *localfs) copyMD(s string, t string) (err error) {
stmt, err := fs.db.Prepare("UPDATE user_interaction SET resource=? WHERE resource=?")
if err != nil {
return errors.Wrap(err, "localfs: error preparing statement")
}
_, err = stmt.Exec(t, s)
if err != nil {
return errors.Wrap(err, "localfs: error executing delete statement")
}
stmt, err = fs.db.Prepare("UPDATE metadata SET resource=? WHERE resource=?")
if err != nil {
return errors.Wrap(err, "localfs: error preparing statement")
}
_, err = stmt.Exec(t, s)
if err != nil {
return errors.Wrap(err, "localfs: error executing delete statement")
}
stmt, err = fs.db.Prepare("UPDATE share_references SET resource=? WHERE resource=?")
if err != nil {
return errors.Wrap(err, "localfs: error preparing statement")
}
_, err = stmt.Exec(t, s)
if err != nil {
return errors.Wrap(err, "localfs: error executing delete statement")
}
return nil
}