import { FieldParser } from "./base"
import { Request } from "express"

export class RequestHeaderFieldParser extends FieldParser<Request> {
   public constructor(field:string) {
      super(field)
   }
   public parse(request:Request):void {
      let field = this.field
      let headers = request.headers
      let fieldLowerCase:string = field.toLowerCase()
      if ( headers[fieldLowerCase] ) {
         if ( typeof headers[fieldLowerCase] === "string" ) {
            this.fieldValue = <string> headers[fieldLowerCase]
         } else {
            this.fieldValue = JSON.stringify(headers[fieldLowerCase])
         }
      }
   }
}