From cd12a2b527824212d0e73a75ef9587a6319c5133 Mon Sep 17 00:00:00 2001
From: usbharu <64310155+usbharu@users.noreply.github.com>
Date: Mon, 29 Jan 2024 16:10:17 +0900
Subject: [PATCH] =?UTF-8?q?feat:=20=E3=83=9A=E3=83=BC=E3=82=B8=E3=83=8D?=
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---
 .../exposed/ExposedPaginationExtension.kt     | 19 ++++++++++
 .../infrastructure/exposed/Page.kt            | 36 +++++++++++++++++++
 2 files changed, 55 insertions(+)
 create mode 100644 src/main/kotlin/dev/usbharu/hideout/application/infrastructure/exposed/ExposedPaginationExtension.kt
 create mode 100644 src/main/kotlin/dev/usbharu/hideout/application/infrastructure/exposed/Page.kt

diff --git a/src/main/kotlin/dev/usbharu/hideout/application/infrastructure/exposed/ExposedPaginationExtension.kt b/src/main/kotlin/dev/usbharu/hideout/application/infrastructure/exposed/ExposedPaginationExtension.kt
new file mode 100644
index 00000000..48047aac
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/application/infrastructure/exposed/ExposedPaginationExtension.kt
@@ -0,0 +1,19 @@
+package dev.usbharu.hideout.application.infrastructure.exposed
+
+import org.jetbrains.exposed.sql.ExpressionWithColumnType
+import org.jetbrains.exposed.sql.Query
+import org.jetbrains.exposed.sql.SortOrder
+import org.jetbrains.exposed.sql.andWhere
+
+fun Query.pagination(page: Page, exp: ExpressionWithColumnType<Long>): Query {
+    if (page.minId != null) {
+        page.maxId?.let { andWhere { exp.lessEq(it) } }
+        page.minId?.let { andWhere { exp.greaterEq(it) } }
+    } else {
+        page.maxId?.let { andWhere { exp.lessEq(it) } }
+        page.sinceId?.let { andWhere { exp.greaterEq(it) } }
+        this.orderBy(exp, SortOrder.DESC)
+    }
+    page.limit?.let { limit(it) }
+    return this
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/application/infrastructure/exposed/Page.kt b/src/main/kotlin/dev/usbharu/hideout/application/infrastructure/exposed/Page.kt
new file mode 100644
index 00000000..33902372
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/application/infrastructure/exposed/Page.kt
@@ -0,0 +1,36 @@
+package dev.usbharu.hideout.application.infrastructure.exposed
+
+sealed class Page {
+    abstract val maxId: Long?
+    abstract val sinceId: Long?
+    abstract val minId: Long?
+    abstract val limit: Int?
+
+    data class PageByMaxId(
+        override val maxId: Long?,
+        override val sinceId: Long?,
+        override val limit: Int?
+    ) : Page() {
+        override val minId: Long? = null
+    }
+
+    data class PageByMinId(
+        override val maxId: Long?,
+        override val minId: Long?,
+        override val limit: Int?
+    ) : Page() {
+        override val sinceId: Long? = null
+    }
+
+    companion object {
+        fun of(maxId: Long?, sinceId: Long?, minId: Long?, limit: Int?): Page = if (minId != null) {
+            PageByMinId(
+                maxId, minId, limit
+            )
+        } else {
+            PageByMaxId(
+                maxId, sinceId, limit
+            )
+        }
+    }
+}