From 6ea742073940d2d5809fb637d3d3a785341fc4f9 Mon Sep 17 00:00:00 2001
From: vlad <vlad@driver.xyz>
Date: Thu, 17 Aug 2017 14:15:20 -0700
Subject: Moving PostgresContext to the common code

(cherry picked from commit 8acbc7e)
---
 .../pdsuicommon/db/PostgresQueryBuilder.scala      | 98 ++++++++++++++++++++++
 1 file changed, 98 insertions(+)
 create mode 100644 src/main/scala/xyz/driver/pdsuicommon/db/PostgresQueryBuilder.scala

(limited to 'src/main/scala/xyz/driver/pdsuicommon/db/PostgresQueryBuilder.scala')

diff --git a/src/main/scala/xyz/driver/pdsuicommon/db/PostgresQueryBuilder.scala b/src/main/scala/xyz/driver/pdsuicommon/db/PostgresQueryBuilder.scala
new file mode 100644
index 0000000..8ef1829
--- /dev/null
+++ b/src/main/scala/xyz/driver/pdsuicommon/db/PostgresQueryBuilder.scala
@@ -0,0 +1,98 @@
+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))
+  }
+}
-- 
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