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// Copyright 2025 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
package db
import (
"context"
"errors"
"cloud.google.com/go/spanner"
"github.com/google/uuid"
)
type FindingRepository struct {
client *spanner.Client
*genericEntityOps[Finding, string]
}
func NewFindingRepository(client *spanner.Client) *FindingRepository {
return &FindingRepository{
client: client,
genericEntityOps: &genericEntityOps[Finding, string]{
client: client,
keyField: "ID",
table: "Findings",
},
}
}
type FindingID struct {
SessionID string
TestName string
Title string
}
// Store queries the information about the session and the existing finding and then
// requests a new Finding object to replace the old one.
// If the callback returns nil, nothing it updated.
func (repo *FindingRepository) Store(ctx context.Context, id *FindingID,
cb func(session *Session, old *Finding) (*Finding, error)) error {
_, err := repo.client.ReadWriteTransaction(ctx,
func(ctx context.Context, txn *spanner.ReadWriteTransaction) error {
// Query the existing finding, if it exists.
oldFinding, err := readEntity[Finding](ctx, txn, spanner.Statement{
SQL: "SELECT * from `Findings` WHERE `SessionID`=@sessionID " +
"AND `TestName` = @testName AND `Title`=@title",
Params: map[string]any{
"sessionID": id.SessionID,
"testName": id.TestName,
"title": id.Title,
},
})
if err != nil {
return err
}
// Query the Session object.
session, err := readEntity[Session](ctx, txn, spanner.Statement{
SQL: "SELECT * FROM `Sessions` WHERE `ID`=@id",
Params: map[string]any{"id": id.SessionID},
})
if err != nil {
return err
}
// Query the callback.
finding, err := cb(session, oldFinding)
if err != nil {
return err
} else if finding == nil {
return nil // Just abort.
} else if finding.ID == "" {
finding.ID = uuid.NewString()
}
// Insert the finding.
m, err := spanner.InsertStruct("Findings", finding)
if err != nil {
return err
}
var mutations []*spanner.Mutation
if oldFinding != nil {
mutations = append(mutations, spanner.Delete("Findings", spanner.Key{oldFinding.ID}))
}
mutations = append(mutations, m)
return txn.BufferWrite(mutations)
})
return err
}
var errFindingExists = errors.New("the finding already exists")
// A helper for tests.
func (repo *FindingRepository) mustStore(ctx context.Context, finding *Finding) error {
return repo.Store(ctx, &FindingID{
SessionID: finding.SessionID,
TestName: finding.TestName,
Title: finding.Title,
}, func(_ *Session, old *Finding) (*Finding, error) {
if old != nil {
return nil, errFindingExists
}
return finding, nil
})
}
// nolint: dupl
func (repo *FindingRepository) ListForSession(ctx context.Context, sessionID string, limit int) ([]*Finding, error) {
stmt := spanner.Statement{
SQL: "SELECT * FROM `Findings` WHERE `SessionID` = @session ORDER BY `TestName`, `Title`",
Params: map[string]any{"session": sessionID},
}
addLimit(&stmt, limit)
return repo.readEntities(ctx, stmt)
}
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