import { Parser } from '.'
import { Token } from '../token'

export const createObject = (startTag: Token.StartTag) => {
  const object: any = {}
  startTag.atts &&
    startTag.atts.forEach(att => {
      object[att.name.toString()] = att.value.toString()
    })
  return object
}

/**
 * Simplified, opiniated, representation of an xml element
 *
 * Produce an object where attributes are properties (string) of the object and
 * children element are arrays of objects.
 *
 * @remarks
 * - Fully qualified names are used for property names.
 * - All texts are collected in property `#text`
 */
export class XmlToObjectParser implements Parser.IParser {
  onStart(startTag: Token.StartTag, parentCtx: any) {
    const object = createObject(startTag)
    const tagName = startTag.tagName
    const collection: any[] = parentCtx[tagName] || (parentCtx[tagName] = [])
    collection.push(object)
  }
  onText(text: Token.Text | Token.CDATA, ctx: any) {
    ctx['#text'] = ctx['#text'] ? ctx['#text'] + text.textContent : text.textContent
  }
  onChild() {
    return this
  }
}