WrongStringInterpolation.scala

package fix

import scalafix.Diagnostic
import scalafix.Patch
import scalafix.v1.SyntacticDocument
import scalafix.v1.SyntacticRule
import scala.meta.Term
import scalafix.lint.LintSeverity

class WrongStringInterpolation extends SyntacticRule("WrongStringInterpolation") {
  private val upperCaseChars = 'A' to 'Z'

  override def fix(implicit doc: SyntacticDocument): Patch = {
    doc.tree.collect {
      case t @ Term.Interpolate(Term.Name("s"), _, args) =>
        if (
          args.collectFirst {
            case Term.Name(name) if upperCaseChars.contains(name.head) => true
          }.nonEmpty
        ) {
          Patch.lint(
            new Diagnostic {
              override def message  = "string interpolationに渡す変数が間違ってませんか？？？"
              override def severity = LintSeverity.Warning
              override def position = t.pos
            }
          )
        } else {
          Patch.empty
        }
    }.asPatch
  }
}