191 lines
7.4 KiB
Scala
191 lines
7.4 KiB
Scala
package repository
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import java.io.File
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import java.net.{JarURLConnection, URL}
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import java.nio.file.StandardCopyOption
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import scala.collection.JavaConverters._
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import scala.util.Try
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/** Изображение карты, доступное для выбора в админке. */
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case class MapImage(name: String, file: String, players: Int)
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/**
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* Список картинок карт из app/assets/images/maps.
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*
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* Картинки читаются из исходников (при запуске через `sbt run`) либо из
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* classpath (когда приложение собрано и assets упакованы в jar).
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*/
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object MapImageRepository {
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private val ImageExtensions = Set("jpg", "jpeg", "png", "webp")
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/** Служебные картинки, которые не являются картами. */
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private val IgnoredFiles = Set("default.jpg")
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private val IgnoredPattern = """^img(_\d+)?\.(jpg|jpeg|png|webp)$""".r
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/** Каталоги с картинками: исходники и результат сборки assets. */
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private val MapDirectories = Seq(
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"app/assets/images/maps",
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"target/web/public/main/images/maps",
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"public/images/maps"
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)
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private val ClasspathDirectory = "public/images/maps"
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/** Каталог, в который сохраняются загруженные картинки (исходники). */
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private val SourceUploadDirectory = "app/assets/images/maps"
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/** Каталоги, из которых Play раздаёт assets в dev-режиме. */
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private val RuntimeUploadDirectory = "target/web/public/main/images/maps"
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/** Максимальный размер загружаемого файла. */
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private val MaxUploadBytes = 10L * 1024 * 1024
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/** Все карты, отсортированные по количеству игроков и имени. */
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def all: Seq[MapImage] =
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loadFileNames()
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.distinct
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.map(toMapImage)
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.sortBy(image => (groupOrder(image.players), image.name.toLowerCase))
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/**
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* Сохраняет загруженную картинку карты и возвращает её описание.
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*
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* Файл пишется и в исходники (app/assets), и в каталог, который раздаётся
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* в dev-режиме (target/web/public/main), чтобы картинка сразу появилась
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* в галерее без перезапуска приложения.
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*/
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def saveUploaded(rawFileName: String, source: File): Either[String, MapImage] = {
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if (!source.isFile) Left("Uploaded file not found")
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else if (source.length() <= 0) Left("Uploaded file is empty")
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else if (source.length() > MaxUploadBytes) Left("File is too large (max 10 MB)")
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else sanitizeFileName(rawFileName) match {
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case None => Left("Unsupported file (allowed types: jpg, jpeg, png, webp)")
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case Some(safeName) =>
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val directories = uploadDirectories()
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if (directories.isEmpty) Left("Map images directory not found")
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else {
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val fileName = uniqueFileName(safeName, directories)
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Try {
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directories.foreach { dir =>
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java.nio.file.Files.copy(
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source.toPath,
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new File(dir, fileName).toPath,
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StandardCopyOption.REPLACE_EXISTING
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)
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}
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}.toEither match {
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case Right(_) => Right(toMapImage(fileName))
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case Left(error) => Left(s"Failed to save file: ${error.getMessage}")
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}
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}
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}
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}
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/** Каталоги для записи: исходники создаются при необходимости, остальные — только существующие. */
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private def uploadDirectories(): Seq[File] = {
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val source = new File(SourceUploadDirectory)
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if (!source.isDirectory) source.mkdirs()
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(source +: Seq(new File(RuntimeUploadDirectory)))
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.filter(_.isDirectory)
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}
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/** Проверяет расширение и убирает из имени всё, что может сломать путь. */
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private def sanitizeFileName(rawFileName: String): Option[String] = {
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val name = Option(rawFileName)
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.map(_.trim)
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.map(new File(_).getName)
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.getOrElse("")
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val safe = name.map { c =>
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if (c.isLetterOrDigit || c == '_' || c == '-' || c == '.' || c == ' ' ||
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c == '(' || c == ')' || c == '[' || c == ']') c
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else '_'
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}.mkString.trim
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if (safe.nonEmpty && isMapImage(safe)) Some(safe) else None
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}
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/** Подбирает свободное имя, добавляя суффикс -1, -2, ... при совпадении. */
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private def uniqueFileName(fileName: String, directories: Seq[File]): String = {
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def taken(name: String): Boolean = directories.exists(dir => new File(dir, name).exists())
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if (!taken(fileName)) fileName
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else {
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val dot = fileName.lastIndexOf('.')
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val base = fileName.substring(0, dot)
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val ext = fileName.substring(dot)
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Iterator.from(1)
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.map(i => s"$base-$i$ext")
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.find(name => !taken(name))
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.getOrElse(fileName)
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}
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}
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private def loadFileNames(): Seq[String] = {
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val fromDisk = MapDirectories
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.map(new File(_))
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.find(_.isDirectory)
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.map(dir => Option(dir.listFiles()).toSeq.flatten.filter(_.isFile).map(_.getName))
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.getOrElse(Seq.empty)
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val fileNames = if (fromDisk.nonEmpty) fromDisk else loadFromClasspath()
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fileNames.filter(isMapImage)
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}
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private def isMapImage(fileName: String): Boolean = {
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val lower = fileName.toLowerCase
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ImageExtensions.exists(ext => lower.endsWith("." + ext)) &&
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!IgnoredFiles.contains(lower) &&
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IgnoredPattern.findFirstIn(lower).isEmpty
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}
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private def loadFromClasspath(): Seq[String] = {
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val loader = Option(getClass.getClassLoader).getOrElse(ClassLoader.getSystemClassLoader)
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loader.getResources(ClasspathDirectory).asScala.toSeq.flatMap(readResource)
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}
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private def readResource(url: URL): Seq[String] = url.getProtocol match {
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case "file" =>
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Try(new File(url.toURI)).toOption
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.filter(_.isDirectory)
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.flatMap(dir => Option(dir.listFiles()))
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.toSeq
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.flatten
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.filter(_.isFile)
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.map(_.getName)
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case "jar" =>
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Try {
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val connection = url.openConnection().asInstanceOf[JarURLConnection]
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connection.setUseCaches(false)
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val jar = connection.getJarFile
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try {
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jar.entries().asScala
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.map(_.getName)
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.filter(_.startsWith(ClasspathDirectory + "/"))
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.map(_.stripPrefix(ClasspathDirectory + "/"))
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.filterNot(_.contains("/"))
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.toSeq
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} finally jar.close()
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}.getOrElse(Seq.empty)
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case _ => Seq.empty
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}
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private def toMapImage(fileName: String): MapImage = {
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val baseName = fileName.substring(0, fileName.lastIndexOf('.'))
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MapImage(baseName, fileName, playersFrom(fileName))
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}
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private val PlayersPattern = """(?i)(?:^|\])\s*(\d+)p""".r
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/** Количество игроков из префикса имени: 2p -> 2, 4p -> 4 и т.д. */
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private def playersFrom(fileName: String): Int =
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PlayersPattern.findFirstMatchIn(fileName).map(_.group(1).toInt).getOrElse(0)
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/** Порядок групп: 1x1, 2x2, 3x3, 4x4, остальные. */
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private def groupOrder(players: Int): Int = players match {
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case 2 | 4 | 6 | 8 => players
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case _ => 99
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}
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}
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