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package datastore
import (
"context"
"fmt"
"github.com/lib/pq"
"gitlab.com/gitlab-org/gitaly/internal/praefect/datastore/glsql"
)
func newVirtualStorageNotFoundError(virtualStorage string) error {
return fmt.Errorf("virtual storage %q not found", virtualStorage)
}
func newAssignmentsNotFoundError(virtualStorage, relativePath string) error {
return fmt.Errorf("host assignments for repository %q/%q not found", virtualStorage, relativePath)
}
// AssignmentStore manages host assignments in Postgres.
type AssignmentStore struct {
db glsql.Querier
configuredStorages map[string][]string
}
// NewAssignmentsStore returns a new AssignmentStore using the passed in database.
func NewAssignmentStore(db glsql.Querier, configuredStorages map[string][]string) AssignmentStore {
return AssignmentStore{db: db, configuredStorages: configuredStorages}
}
func (s AssignmentStore) GetHostAssignments(ctx context.Context, virtualStorage, relativePath string) ([]string, error) {
configuredStorages, ok := s.configuredStorages[virtualStorage]
if !ok {
return nil, newVirtualStorageNotFoundError(virtualStorage)
}
rows, err := s.db.QueryContext(ctx, `
SELECT storage
FROM repositories
JOIN storage_repositories USING (virtual_storage, relative_path)
WHERE virtual_storage = $1
AND relative_path = $2
AND assigned
AND storage = ANY($3::text[])
`, virtualStorage, relativePath, pq.StringArray(configuredStorages))
if err != nil {
return nil, fmt.Errorf("query: %w", err)
}
defer rows.Close()
var assignedStorages []string
for rows.Next() {
var storage string
if err := rows.Scan(&storage); err != nil {
return nil, fmt.Errorf("scan: %w", err)
}
assignedStorages = append(assignedStorages, storage)
}
if err := rows.Err(); err != nil {
return nil, fmt.Errorf("iterating rows: %w", err)
}
if len(assignedStorages) == 0 {
return nil, newAssignmentsNotFoundError(virtualStorage, relativePath)
}
return assignedStorages, nil
}
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