/*
   Copyright 2010 Aaron J. Radke

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/
package cc.drx

//------
//**Google like word boundary search with boolean like operators such as '&' and '|' where & has a higher precedence */
case class CompoundSearch(searchStr:String){
  val orPat = """(\||\bOR\b)"""
  val andPat = """(\&|\bAND\b)"""
  private val orPats = searchStr.trim.split(orPat).map{orStr =>
    orStr.trim.split(andPat).map{ andStr =>
      andStr.trim.toLowerCase
      // ("(?i)\\b" + andStr.trim + "\\b").r.unanchored  //require word boundry, but ignore case & make sure unanchored
    }
  }
  val canonSearchStr = orPats.map{_.mkString(" AND ")}.mkString(" OR ")
  // println(s"Search: $canonSearchStr")

  def existsMatch(str:String):Boolean = {
    val lowerCaseStr = str.toLowerCase
    orPats.exists{andPats =>
      // andPats.forall{_ existsMatch str}
      andPats.forall{lowerCaseStr contains _}
    }
  }
}