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Add precondition checks

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Him188 2020-05-06 11:52:44 +08:00
parent 05429e5800
commit aadea751ac
1 changed files with 6 additions and 1 deletions
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7
mirai-core/src/jvmMain/kotlin/net/mamoe/mirai/utils/ExternalImageJvm.kt
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@ -37,7 +37,12 @@ fun BufferedImage.toExternalImage(formatName: String = "png"): ExternalImage =
* @param deleteOnClose 若为 `true`, 图片发送后将会删除这个文件
*/
@JvmOverloads
fun File.toExternalImage(deleteOnClose: Boolean = false): ExternalImage = ExternalImage(asReusableInput(deleteOnClose))
fun File.toExternalImage(deleteOnClose: Boolean = false): ExternalImage {
require(this.isFile) { "File must be a file" }
require(this.exists()) { "File must exist" }
require(this.canRead()) { "File must can be read" }
return ExternalImage(asReusableInput(deleteOnClose))
}
/**
* 将 [URL] 委托为 [ExternalImage].