add mime type working

utils/common/build.gradle

@@ -55,6 +55,8 @@ kotlin {
                 implementation kotlin('stdlib-jdk8')
                 api "org.jetbrains.kotlinx:kotlinx-coroutines-core:$kotlin_coroutines_version"
                 api "org.jetbrains.kotlinx:kotlinx-serialization-runtime:$kotlin_serialisation_runtime_version"
+
+                api "javax.activation:activation:$javax_activation_version"
             }
         }
         jvmTest {

utils/common/src/commonMain/kotlin/com/insanusmokrassar/postssystem/utils/common/MimeType.kt

@@ -0,0 +1,30 @@
+package com.insanusmokrassar.postssystem.utils.common
+
+import kotlinx.serialization.*
+
+private val mimesCache = mutableMapOf<String, MimeType>()
+
+@Serializable(MimeTypeSerializer::class)
+expect class MimeType {
+    val raw: String
+}
+
+fun mimeType(raw: String) = mimesCache.getOrPut(raw) {
+    parseMimeType(raw)
+}
+
+internal expect fun parseMimeType(raw: String): MimeType
+
+@Serializer(MimeType::class)
+internal object MimeTypeSerializer : KSerializer<MimeType> {
+    override val descriptor: SerialDescriptor = PrimitiveDescriptor("mimeType", PrimitiveKind.STRING)
+
+    override fun deserialize(decoder: Decoder): MimeType {
+        val mimeType = decoder.decodeString()
+        return mimeType(mimeType)
+    }
+
+    override fun serialize(encoder: Encoder, value: MimeType) {
+        encoder.encodeString(value.raw)
+    }
+}

utils/common/src/jsMain/kotlin/com/insanusmokrassar/postssystem/utils/common/MimeType.kt

@@ -0,0 +1,19 @@
+package com.insanusmokrassar.postssystem.utils.common
+
+import kotlinx.serialization.*
+import org.w3c.dom.get
+import kotlin.browser.window
+
+private val mimesCache = mutableMapOf<String, MimeType>()
+
+@Serializable(MimeTypeSerializer::class)
+actual class MimeType(
+    actual val raw: String
+) {
+    @Transient
+    val jsMimeType = window.navigator.mimeTypes[raw]
+
+    override fun toString(): String = raw
+}
+
+actual fun parseMimeType(raw: String) = MimeType(raw)

utils/common/src/jvmMain/kotlin/com/insanusmokrassar/postssystem/utils/common/MimeType.kt

@@ -0,0 +1,13 @@
+package com.insanusmokrassar.postssystem.utils.common
+
+import kotlinx.serialization.*
+
+private val mimesCache = mutableMapOf<String, MimeType>()
+
+@Serializable(MimeTypeSerializer::class)
+actual class MimeType(
+    actual val raw: String
+) : javax.activation.MimeType(raw)
+
+actual fun parseMimeType(raw: String): MimeType = MimeType(raw)
+