Mini plugin for IntelliJ to convert secondary constructor to top level function (basic implementations; to be used via LivePlugin)

plugin.kts

import com.intellij.codeInsight.intention.IntentionAction
import com.intellij.openapi.editor.Editor
import com.intellij.openapi.editor.ScrollType
import com.intellij.openapi.project.Project
import com.intellij.psi.PsiFile
import com.intellij.psi.PsiWhiteSpace
import com.intellij.psi.util.parentOfType
import liveplugin.registerIntention
import org.jetbrains.kotlin.idea.base.util.reformatted
import org.jetbrains.kotlin.psi.KtClass
import org.jetbrains.kotlin.psi.KtPsiFactory
import org.jetbrains.kotlin.psi.KtSecondaryConstructor

// depends-on-plugin org.jetbrains.kotlin

registerIntention(ConvertSecondaryConstructorToTopLevelFunction())

class ConvertSecondaryConstructorToTopLevelFunction : IntentionAction {
    override fun isAvailable(project: Project, editor: Editor, file: PsiFile) =
        currentElementIn(editor, file)?.parentOfType<KtSecondaryConstructor>() != null

    override fun invoke(project: Project, editor: Editor, file: PsiFile) {
        val constructor = currentElementIn(editor, file)?.parentOfType<KtSecondaryConstructor>() ?: return
        val ktClass = constructor.parentOfType<KtClass>() ?: return
        val factory = KtPsiFactory(project, false)
        val function = factory.createFunction(
            constructor.text
                .replace("constructor", "fun ${ktClass.name}")
                .replace(") :", ") =")
                .replace("this", "${ktClass.name}")
        )
        val nextSibling = ktClass.prevSibling
        val added = nextSibling.parent.addAfter(function, nextSibling).reformatted()
        added.parent.addBefore(factory.createNewLine(2), added)
        editor.caretModel.moveToOffset(added.textOffset - 1)
        editor.scrollingModel.scrollToCaret(ScrollType.RELATIVE)

        (constructor.nextSibling as? PsiWhiteSpace)?.delete()
        constructor.delete()
    }

    fun currentElementIn(editor: Editor, file: PsiFile) =
        file.findElementAt(editor.caretModel.offset)

    override fun startInWriteAction() = true

    override fun getText() = "Convert to top level function 🙈"

    override fun getFamilyName() = "Live Plugin"
}