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package xyz.driver.pdsuicommon.db
import java.sql.ResultSet
import io.getquill.{PostgresDialect, PostgresEscape}
import scala.collection.breakOut
object PostgresQueryBuilder {
import xyz.driver.pdsuicommon.db.QueryBuilder._
type Escape = PostgresEscape
val Escape = PostgresEscape
def apply[T](tableName: String,
lastUpdateFieldName: Option[String],
nullableFields: Set[String],
links: Set[TableLink],
runner: Runner[T],
countRunner: CountRunner): PostgresQueryBuilder[T] = {
val parameters = PostgresQueryBuilderParameters(
tableData = TableData(tableName, lastUpdateFieldName, nullableFields),
links = links.map(x => x.foreignTableName -> x)(breakOut)
)
new PostgresQueryBuilder[T](parameters)(runner, countRunner)
}
def apply[T](tableName: String,
lastUpdateFieldName: Option[String],
nullableFields: Set[String],
links: Set[TableLink],
extractor: ResultSet => T)(implicit sqlContext: PostgresContext): PostgresQueryBuilder[T] = {
apply(tableName, QueryBuilderParameters.AllFields, lastUpdateFieldName, nullableFields, links, extractor)
}
def apply[T](tableName: String,
fields: Set[String],
lastUpdateFieldName: Option[String],
nullableFields: Set[String],
links: Set[TableLink],
extractor: ResultSet => T)(implicit sqlContext: PostgresContext): PostgresQueryBuilder[T] = {
val runner: Runner[T] = { parameters =>
val (sql, binder) = parameters.toSql(countQuery = false, fields = fields, namingStrategy = PostgresEscape)
sqlContext.executeQuery[T](sql, binder, { resultSet =>
extractor(resultSet)
})
}
val countRunner: CountRunner = { parameters =>
val (sql, binder) = parameters.toSql(countQuery = true, namingStrategy = PostgresEscape)
sqlContext
.executeQuery[CountResult](
sql,
binder, { resultSet =>
val count = resultSet.getInt(1)
val lastUpdate = if (parameters.tableData.lastUpdateFieldName.isDefined) {
Option(resultSet.getTimestamp(2)).map(sqlContext.timestampToLocalDateTime)
} else None
(count, lastUpdate)
}
)
.head
}
apply[T](
tableName = tableName,
lastUpdateFieldName = lastUpdateFieldName,
nullableFields = nullableFields,
links = links,
runner = runner,
countRunner = countRunner
)
}
}
class PostgresQueryBuilder[T](parameters: PostgresQueryBuilderParameters)(implicit runner: QueryBuilder.Runner[T],
countRunner: QueryBuilder.CountRunner)
extends QueryBuilder[T, PostgresDialect, PostgresQueryBuilder.Escape](parameters) {
def withFilter(newFilter: SearchFilterExpr): QueryBuilder[T, PostgresDialect, PostgresEscape] = {
new PostgresQueryBuilder[T](parameters.copy(filter = newFilter))
}
def withSorting(newSorting: Sorting): QueryBuilder[T, PostgresDialect, PostgresEscape] = {
new PostgresQueryBuilder[T](parameters.copy(sorting = newSorting))
}
def withPagination(newPagination: Pagination): QueryBuilder[T, PostgresDialect, PostgresEscape] = {
new PostgresQueryBuilder[T](parameters.copy(pagination = Some(newPagination)))
}
def resetPagination: QueryBuilder[T, PostgresDialect, PostgresEscape] = {
new PostgresQueryBuilder[T](parameters.copy(pagination = None))
}
}
|
