From 4d7375e5f7800732abefbf71090f2677a1b9d8e9 Mon Sep 17 00:00:00 2001
From: Lanius Trolling <lanius@laniustrolling.dev>
Date: Fri, 22 Mar 2024 18:47:37 -0400
Subject: [PATCH] Do a little trolling

---
 .../kotlin/info/mechyrdia/Configuration.kt    |  1 +
 .../kotlin/info/mechyrdia/Factbooks.kt        |  6 ++++
 .../kotlin/info/mechyrdia/lore/april_1st.kt   | 30 +++++++++++++++++++
 3 files changed, 37 insertions(+)
 create mode 100644 src/jvmMain/kotlin/info/mechyrdia/lore/april_1st.kt

diff --git a/src/jvmMain/kotlin/info/mechyrdia/Configuration.kt b/src/jvmMain/kotlin/info/mechyrdia/Configuration.kt
index 1de12cd..2cfe26a 100644
--- a/src/jvmMain/kotlin/info/mechyrdia/Configuration.kt
+++ b/src/jvmMain/kotlin/info/mechyrdia/Configuration.kt
@@ -18,6 +18,7 @@ data class Configuration(
 	val templateDir: String = "$rootDir/tpl",
 	val jsonDocDir: String = "$rootDir/data",
 	val scriptDir: String = "$rootDir/funcs",
+	val april1Dir: String = "$rootDir/funny",
 	
 	val dbName: String = "nslore",
 	val dbConn: String = "mongodb://localhost:27017",
diff --git a/src/jvmMain/kotlin/info/mechyrdia/Factbooks.kt b/src/jvmMain/kotlin/info/mechyrdia/Factbooks.kt
index 12738f5..1a2ec5e 100644
--- a/src/jvmMain/kotlin/info/mechyrdia/Factbooks.kt
+++ b/src/jvmMain/kotlin/info/mechyrdia/Factbooks.kt
@@ -108,6 +108,9 @@ fun Application.factbooks() {
 		exception<HttpRedirectException> { call, (url, permanent) ->
 			call.respondRedirect(url, permanent)
 		}
+		exception<AprilFoolsStaticFileRedirectException> { call, (replacement) ->
+			call.respondFile(replacement)
+		}
 		exception<MissingRequestParameterException> { call, _ ->
 			call.respondHtml(HttpStatusCode.BadRequest, call.error400())
 		}
@@ -154,6 +157,9 @@ fun Application.factbooks() {
 		
 		staticFiles("/assets", File(Configuration.CurrentConfiguration.assetDir), index = null) {
 			enableAutoHeadResponse()
+			modify { file, _ ->
+				redirectStaticFileOnApril1st(file)
+			}
 		}
 		
 		get("/map") {
diff --git a/src/jvmMain/kotlin/info/mechyrdia/lore/april_1st.kt b/src/jvmMain/kotlin/info/mechyrdia/lore/april_1st.kt
new file mode 100644
index 0000000..b075d0d
--- /dev/null
+++ b/src/jvmMain/kotlin/info/mechyrdia/lore/april_1st.kt
@@ -0,0 +1,30 @@
+package info.mechyrdia.lore
+
+import info.mechyrdia.Configuration
+import io.ktor.util.*
+import java.io.File
+import java.time.Instant
+import java.time.Month
+import java.time.ZoneId
+
+private val myTimeZone: ZoneId = ZoneId.of("America/New_York")
+
+fun isApril1st(time: Instant = Instant.now()): Boolean {
+	val zonedDateTime = time.atZone(myTimeZone)
+	return zonedDateTime.month == Month.APRIL && zonedDateTime.dayOfMonth == 1
+}
+
+data class AprilFoolsStaticFileRedirectException(val replacement: File) : RuntimeException()
+
+fun redirectFileOnApril1st(requestedFile: File): File? {
+	if (!isApril1st()) return null
+	
+	val rootDir = File(Configuration.CurrentConfiguration.rootDir)
+	val requestedPath = requestedFile.absoluteFile.toRelativeString(rootDir.absoluteFile)
+	val funnyFile = File(Configuration.CurrentConfiguration.april1Dir).combineSafe(requestedPath)
+	return funnyFile.takeIf { it.exists() }
+}
+
+fun redirectStaticFileOnApril1st(requestedFile: File) {
+	redirectFileOnApril1st(requestedFile)?.let { throw AprilFoolsStaticFileRedirectException(it) }
+}
-- 
2.25.1