com.nawforce.pkgforce.stream.VFEvent.scala Maven / Gradle / Ivy

Go to download
/*
 Copyright (c) 2021 Kevin Jones, All rights reserved.
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions
 are met:
 1. Redistributions of source code must retain the above copyright
    notice, this list of conditions and the following disclaimer.
 2. Redistributions in binary form must reproduce the above copyright
    notice, this list of conditions and the following disclaimer in the
    documentation and/or other materials provided with the distribution.
 3. The name of the author may not be used to endorse or promote products
    derived from this software without specific prior written permission.
 */
package com.nawforce.pkgforce.stream

import com.nawforce.pkgforce.documents.SourceInfo
import com.nawforce.pkgforce.names.Name
import com.nawforce.pkgforce.path.LocationAnd
import com.nawforce.runtime.parsers.{PageParser, Source}
import com.nawforce.vfparser.VFParser
import com.nawforce.vfparser.VFParser.AttributeContext

import java.util.regex.{Matcher, Pattern}
import scala.collection.compat.immutable.ArraySeq
import scala.collection.mutable.ArrayBuffer

abstract class VFEvent(
  val controllers: ArraySeq[LocationAnd[Name]],
  val expressions: ArraySeq[LocationAnd[String]]
) extends PackageEvent {
  val sourceInfo: SourceInfo
}

object VFEvent {
  lazy val expressionMatcher: Matcher = Pattern.compile("\\{![^}]+}").matcher("")

  def extractControllers(
    source: Source,
    component: VFParser.VfUnitContext,
    isPage: Boolean
  ): ArraySeq[LocationAnd[Name]] = {
    val root = component.element()
    ArraySeq.unsafeWrapArray(
      PageParser
        .toScala(root.attribute())
        .flatMap(attr => {
          val location = source.getLocation(attr)
          PageParser.getText(attr.attributeName()) match {
            case "controller" => Array((location.location, extractAttributeValue(attr)))
            case "extensions" if isPage =>
              extractAttributeValue(attr)
                .split(',')
                .map(_.trim)
                .map(name => (location.location, name))
            case _ => None
          }
        })
        .map(locationAndName => LocationAnd(locationAndName._1, Name(locationAndName._2)))
        .toArray
    )
  }

  def extractExpressions(
    source: Source,
    component: VFParser.VfUnitContext
  ): ArraySeq[LocationAnd[String]] = {
    val root: VFParser.ElementContext = component.element()
    val buffer                        = ArrayBuffer[LocationAnd[String]]()
    collectExpressions(source, root, buffer)
    ArraySeq.unsafeWrapArray(buffer.toArray)
  }

  private def collectExpressions(
    source: Source,
    element: VFParser.ElementContext,
    exprs: ArrayBuffer[LocationAnd[String]]
  ): Unit = {

    PageParser
      .toScala(element.attribute())
      .foreach(attribute => {
        PageParser
          .toScala(attribute.attributeValues())
          .foreach(attrValue => {
            val attrText = PageParser.getText(attrValue)
            if (attrText.startsWith("{!") && attrText.endsWith("}"))
              exprs.addOne(
                LocationAnd(
                  source.getLocation(attrValue).location,
                  attrText.substring(2, attrText.length - 1)
                )
              )
          })
      })

    val content = PageParser.toScala(element.content())
    content.foreach(c =>
      PageParser
        .toScala(c.chardata())
        .foreach(charData => {
          val text = PageParser.getText(charData)
          expressionMatcher.reset(text)
          while (expressionMatcher.find())
            exprs.addOne(
              LocationAnd(
                source.getLocation(charData).location,
                text.substring(expressionMatcher.start() + 2, expressionMatcher.end() - 1)
              )
            )
        })
    )

    content
      .map(c => PageParser.toScala(c.element()))
      .getOrElse(Seq())
      .foreach(el => collectExpressions(source, el, exprs))
  }

  private def extractAttributeValue(context: AttributeContext): String = {
    PageParser.toScala(context.attributeValues()).map(value => PageParser.getText(value)).mkString
  }
}