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package xyz.driver.restquery.db
import java.sql.{JDBCType, PreparedStatement}
import java.time.LocalDateTime
import slick.jdbc._
import xyz.driver.restquery.query._
import scala.concurrent.{ExecutionContext, Future}
object SlickQueryBuilder {
type Runner[T] = SlickQueryBuilderParameters => Future[Seq[T]]
type CountResult = Future[(Int, Option[LocalDateTime])]
type CountRunner = SlickQueryBuilderParameters => CountResult
/**
* Binder for PreparedStatement
*/
type Binder = PreparedStatement => PreparedStatement
final case class TableData(
tableName: String,
lastUpdateFieldName: Option[String] = None,
nullableFields: Set[String] = Set.empty)
val AllFields = Set("*")
implicit class SQLActionBuilderConcat(a: SQLActionBuilder) {
def concat(b: SQLActionBuilder): SQLActionBuilder = {
SQLActionBuilder(
a.queryParts ++ b.queryParts,
(p: Unit, pp: PositionedParameters) => {
a.unitPConv.apply(p, pp)
b.unitPConv.apply(p, pp)
}
)
}
}
implicit object SetQueryParameter extends SetParameter[AnyRef] {
def apply(v: AnyRef, pp: PositionedParameters) = {
pp.setObject(v, JDBCType.BINARY.getVendorTypeNumber)
}
}
}
final case class SlickTableLink(keyColumnName: String, foreignTableName: String, foreignKeyColumnName: String)
final case class SlickPostgresQueryBuilderParameters(
databaseName: String,
tableData: SlickQueryBuilder.TableData,
links: Map[String, SlickTableLink] = Map.empty,
filter: SearchFilterExpr = SearchFilterExpr.Empty,
sorting: Sorting = Sorting.Empty,
pagination: Option[Pagination] = None)
extends SlickQueryBuilderParameters {
def limitToSql()(implicit profile: JdbcProfile): SQLActionBuilder = {
import profile.api._
pagination.map { pagination =>
val startFrom = (pagination.pageNumber - 1) * pagination.pageSize
sql"limit #${pagination.pageSize} OFFSET #$startFrom"
} getOrElse (sql"")
}
val qs = """""""
}
/**
* @param links Links to another tables grouped by foreignTableName
*/
final case class SlickMysqlQueryBuilderParameters(
databaseName: String,
tableData: SlickQueryBuilder.TableData,
links: Map[String, SlickTableLink] = Map.empty,
filter: SearchFilterExpr = SearchFilterExpr.Empty,
sorting: Sorting = Sorting.Empty,
pagination: Option[Pagination] = None)
extends SlickQueryBuilderParameters {
def limitToSql()(implicit profile: JdbcProfile): SQLActionBuilder = {
import profile.api._
pagination
.map { pagination =>
val startFrom = (pagination.pageNumber - 1) * pagination.pageSize
sql"limit #$startFrom, #${pagination.pageSize}"
}
.getOrElse(sql"")
}
val qs = """`"""
}
abstract class SlickQueryBuilder[T](val parameters: SlickQueryBuilderParameters)(
implicit runner: SlickQueryBuilder.Runner[T],
countRunner: SlickQueryBuilder.CountRunner) {
def run()(implicit ec: ExecutionContext): Future[Seq[T]] = runner(parameters)
def runCount()(implicit ec: ExecutionContext): SlickQueryBuilder.CountResult = countRunner(parameters)
/**
* Runs the query and returns total found rows without considering of pagination.
*/
def runWithCount()(implicit ec: ExecutionContext): Future[(Seq[T], Int, Option[LocalDateTime])] = {
for {
all <- run
(total, lastUpdate) <- runCount
} yield (all, total, lastUpdate)
}
def withFilter(newFilter: SearchFilterExpr): SlickQueryBuilder[T]
def withFilter(filter: Option[SearchFilterExpr]): SlickQueryBuilder[T] = {
filter.fold(this)(withFilter)
}
def resetFilter: SlickQueryBuilder[T] = withFilter(SearchFilterExpr.Empty)
def withSorting(newSorting: Sorting): SlickQueryBuilder[T]
def withSorting(sorting: Option[Sorting]): SlickQueryBuilder[T] = {
sorting.fold(this)(withSorting)
}
def resetSorting: SlickQueryBuilder[T] = withSorting(Sorting.Empty)
def withPagination(newPagination: Pagination): SlickQueryBuilder[T]
def withPagination(pagination: Option[Pagination]): SlickQueryBuilder[T] = {
pagination.fold(this)(withPagination)
}
def resetPagination: SlickQueryBuilder[T]
}
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