org.scalajs.cli.internal.ImportMap.scala Maven / Gradle / Ivy

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package org.scalajs.cli.internal

import com.github.plokhotnyuk.jsoniter_scala.core._
import com.github.plokhotnyuk.jsoniter_scala.macros._
import org.scalajs.linker.interface.IRFile
import java.io.File
import com.armanbilge.sjsimportmap.ImportMappedIRFile

object ImportMapJsonIr {

  type Scope = Map[String, String]

  final case class ImportMap(
    val imports: Map[String, String],
    val scopes: Option[Map[String, Scope]]
  )

  object ImportMap {
    implicit val codec: JsonValueCodec[ImportMap] = JsonCodecMaker.make
  }

  def remapImports(pathToImportPath: File, irFiles: Seq[IRFile]):  Seq[IRFile] = {
    val path = os.Path(pathToImportPath)
    val importMapJson = if(os.exists(path))(
      readFromString[ImportMap](os.read(path))
    ) else {
      throw new AssertionError(s"importmap file at path ${path} does not exist.")
    }
    if (importMapJson.scopes.nonEmpty) {
      throw new AssertionError("importmap scopes are not supported.")
    }
    val importsOnly : Map[String, String] = importMapJson.imports

    val remapFct = importsOnly.toSeq.foldLeft((in: String) => in){ case(fct, (s1, s2)) =>
      val fct2 : (String => String) = (in => in.replace(s1, s2))
      (in => fct(fct2(in)))
    }

    irFiles.map{ImportMappedIRFile.fromIRFile(_)(remapFct)}
  }
}