ipld-eth-server/pkg/transformers/shared/repository.go
2018-12-12 12:13:23 +01:00

104 lines
3.3 KiB
Go

package shared
import (
"database/sql"
"database/sql/driver"
"fmt"
"github.com/vulcanize/vulcanizedb/pkg/core"
"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
"strings"
)
type Repository struct{}
func (_ Repository) MarkHeaderChecked(headerID int64, db *postgres.DB, checkedHeadersColumn string) error {
_, err := db.Exec(`INSERT INTO public.checked_headers (header_id, `+checkedHeadersColumn+`)
VALUES ($1, $2)
ON CONFLICT (header_id) DO
UPDATE SET `+checkedHeadersColumn+` = $2`, headerID, true)
return err
}
func (_ Repository) MarkHeaderCheckedInTransaction(headerID int64, tx *sql.Tx, checkedHeadersColumn string) error {
_, err := tx.Exec(`INSERT INTO public.checked_headers (header_id, `+checkedHeadersColumn+`)
VALUES ($1, $2)
ON CONFLICT (header_id) DO
UPDATE SET `+checkedHeadersColumn+` = $2`, headerID, true)
return err
}
// Treats a header as missing if it's not in the headers table, or not checked for some log type
func (_ Repository) MissingHeaders(startingBlockNumber, endingBlockNumber int64, db *postgres.DB, notCheckedSQL string) ([]core.Header, error) {
var result []core.Header
var query string
var err error
if endingBlockNumber == -1 {
query = `SELECT headers.id, headers.block_number, headers.hash FROM headers
LEFT JOIN checked_headers on headers.id = header_id
WHERE (header_id ISNULL OR ` + notCheckedSQL + `)
AND headers.block_number >= $1
AND headers.eth_node_fingerprint = $2`
err = db.Select(&result, query, startingBlockNumber, db.Node.ID)
} else {
query = `SELECT headers.id, headers.block_number, headers.hash FROM headers
LEFT JOIN checked_headers on headers.id = header_id
WHERE (header_id ISNULL OR ` + notCheckedSQL + `)
AND headers.block_number >= $1
AND headers.block_number <= $2
AND headers.eth_node_fingerprint = $3`
err = db.Select(&result, query, startingBlockNumber, endingBlockNumber, db.Node.ID)
}
return result, err
}
func (_ Repository) GetCheckedColumnNames(db *postgres.DB) ([]string, error) {
// Query returns `[]driver.Value`, nullable polymorphic interface
var queryResult []driver.Value
columnNamesQuery :=
`SELECT column_name FROM information_schema.columns
WHERE table_schema = 'public'
AND table_name = 'checked_headers'
AND column_name ~ '_checked';`
err := db.Select(&queryResult, columnNamesQuery)
if err != nil {
return []string{}, err
}
// Transform column names from `driver.Value` to strings
var columnNames []string
for _, result := range queryResult {
if columnName, ok := result.(string); ok {
columnNames = append(columnNames, columnName)
} else {
return []string{}, fmt.Errorf("incorrect value for checked_headers column name")
}
}
return columnNames, nil
}
// Builds a SQL string that checks if any column value is FALSE, given the column names.
// Defaults to FALSE when no columns are provided.
// Ex: ["columnA", "columnB"] => "NOT (columnA AND columnB)"
// [] => "FALSE"
func (_ Repository) CreateNotCheckedSQL(boolColumns []string) string {
var result strings.Builder
if len(boolColumns) == 0 {
return "FALSE"
}
result.WriteString("NOT (")
for _, column := range boolColumns[:len(boolColumns)-1] {
result.WriteString(fmt.Sprintf("%v AND ", column))
}
// No trailing "OR" for last column name
result.WriteString(fmt.Sprintf("%v)", boolColumns[len(boolColumns)-1]))
return result.String()
}