New J2K: add FUS statistics for J2K conversions

j2k/src/org/jetbrains/kotlin/j2k/javaToKotlinFus.kt

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.j2k
+
+import org.jetbrains.kotlin.idea.statistics.FUSEventGroups
+import org.jetbrains.kotlin.idea.statistics.KotlinFUSLogger
+
+enum class ConversionType(val text: String) {
+    FILES("Files"), PSI_EXPRESSION("PSI expression"), TEXT_EXPRESSION("Text expression");
+}
+
+fun logJ2kConversionStatistics(
+    type: ConversionType,
+    isNewJ2k: Boolean,
+    conversionTime: Long,
+    linesCount: Int,
+    filesCount: Int
+) {
+    val data = mapOf(
+        "Lines count" to linesCount,
+        "Files count" to filesCount,
+        "Is new J2K" to isNewJ2k,
+        "Time" to conversionTime
+    ).map { (key, value) ->
+        key to value.toString()
+    }.toMap()
+
+    KotlinFUSLogger.log(FUSEventGroups.J2K, type.text, data)
+}
+