All files / src/core/nfa getMatch.ts

82.74% Statements 139/168
80.99% Branches 98/121
100% Functions 16/16
82.42% Lines 136/165
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/*eslint func-names: 0*/
 
function Value( val ) {
  this.value = val;
}
 
function Piece( frag ) {
  this.fragment = frag;
}
function GroupedPiece( frag ) {
  this.fragment = frag;
}
function NamedPiece( name, frag ) {
  this.fragment = frag;
  this.name = name;
}
function GroupedAltPiece( frag ) {
  this.fragment = frag;
}
function NamedAltPiece( name, frag ) {
  this.fragment = frag;
  this.name = name;
}
function Nothing() {}
function Empty() {}
function MaybeEnter() {}
function GroupName( name ) {
  this.name = name;
}
 
export default function getMatch( chain, walkFn, walkOpts ) {
  var { conform } = walkOpts;
  var { inputType } = chain;
 
  const valStack = [];
  var r;E
 
  chain.forEach( function( curr ) {
    if ( curr.move ) {
      switch ( curr.move.dir ) {
      case 'maybe_enter' : {
        valStack.push( new MaybeEnter() );
      } break;
      case 'maybe_exit': {
        let c,
          acc = new Empty( );
        while ( !( ( c = valStack.pop() ) instanceof MaybeEnter ) ) {
          acc = _foldLeft( inputType, conform, acc, c );
        }
        valStack.push( acc );
      } break;
      case 'maybe_single_enter' : {
        valStack.push( new MaybeEnter() );
      } break;
      case 'maybe_single_exit': {
        let top = valStack.pop(),
          acc;
        if ( top instanceof MaybeEnter ) {
          acc = new Nothing();
        } else {
          acc = top;
        //get rid of MaybeEnter
          valStack.pop();
        }
        valStack.push( acc );
      } break;
      case 'enter' : {
      } break;
      case 'exit': {
        let c = valStack.pop();
        let acc;
        if ( conform && c instanceof NamedAltPiece ) {
          let interim;
          if ( c.fragment instanceof Empty ) {
            interim = {};
          } else {
            interim = { [ c.name ]: c.fragment };
          }
          acc = new GroupedAltPiece( interim );
        } else {
          acc = c;
        }
        valStack.push( acc );
      } break;
      case 'maybe_in': {
        if ( conform && curr.move.name ) {
          valStack.push( new GroupName( curr.move.name ) );
        }
      } break;
      case 'loop': {
      } break;
      case 'maybe_out': {
        if ( conform && curr.move.name ) {
          let c = valStack.pop();
          let gn = valStack.pop();
          valStack.push( _giveName( gn, c ) );
        }
      } break;
      case 'in': {
        if ( conform && curr.move.name ) {
          valStack.push( new GroupName( curr.move.name ) );
        }
      } break;
      case 'out': {
        if ( conform && curr.move.name ) {
          let c = valStack.pop();
          let gn = valStack.pop();
          valStack.push( _giveAltName( gn, c ) );
        }
      } break;
      case 'clause': {
        let conformed = walkFn( curr.clause, curr.guide, walkOpts );
        valStack.push( new Value( conformed ) );
      } break;
      default: console.error( curr ); throw 'FUUU';
      }
    }
  } );
  if ( valStack.length !== 1 ) {
    console.error( 'valStack', valStack );
    throw '!';
  }
  r = valStack.pop();
 
  let retVal;
 
  if ( r instanceof Piece ) {
    retVal = r.fragment;
  } else if ( r instanceof GroupedPiece ) {
    retVal = r.fragment;
  } else if ( r instanceof GroupedAltPiece ) {
    retVal = r.fragment;
  } else if ( r instanceof Value ) {
    retVal = r.value;
  } else if ( r instanceof Empty ) {
    retVal = _coerceToProperType( inputType, [] );
  } else if ( r instanceof Nothing ) {
    retVal = null;
  } else {
    retVal = r;
  }
 
  return retVal;
}I

function _giveName( groupName, c ) {
  if ( c instanceof Nothing ) {
    return new NamedPiece( groupName.name, new Empty() );
  } else if ( c instanceof GroupedPiece ) {
    return new NamedPiece( groupName.name, c.fragment );
  } else if ( c instanceof Piece || c instanceof GroupedAltPiece ) {
    return new NamedPiece( groupName.name, c.fragment );
  } else if ( c instanceof Value ) {
    return new NamedPiece( groupName.name, c.value );
  } else if ( c instanceof Empty ) {
    return new NamedPiece( groupName.name, new Empty() );
  } else {
    console.error( c );
    throw 'c!!!';
  }
}
E
function _giveAltName( groupName, c ) {
  if ( c instanceof Nothing ) {
    return new NamedAltPiece( groupName.name, new Empty() );
  } else if ( c instanceof GroupedAltPiece ) {
    return new NamedAltPiece( groupName.name, c.fragment );
  } else if ( c instanceof Piece ) {
    return new NamedAltPiece( groupName.name, c.fragment );
  } else if ( c instanceof GroupedPiece ) {
    return new NamedAltPiece( groupName.name, c.fragment );
  } else if ( c instanceof Value ) {
    return new NamedAltPiece( groupName.name, c.value );
  } else if ( c instanceof Empty ) {
    return new NamedAltPiece( groupName.name, new Empty() );
  } else {
    console.error( c );
    throwI 'c!!!alt';
  }
}
 
function _foldLeft( inputType, conform, acc, c ) {
 
  if ( conform && c instanceof NamedPiece ) {
    let rightPart;
 
    if ( Eacc instanceof Nothing ) {
      rightPart = {};
    } else if ( !acc ) {
      rightPart = {};
    } else if ( acc instanceof Empty ) {
      rightPart = {};
    } else if ( acc instanceof GroupedPiece ) {
      rightPart = acc.fragment;
    } else if ( acc instanceof Piece ) {
    I  rightPart = acc.fragment;
    } else if ( acc instanceof GroupedAltPiece ) {
      rightPart = acc.fragment;
    } else {
      console.error( acc, c );
      throw '!!acc_fl_np';
    }
    let interim;
    if ( c.fragment instanceof Empty ) {
      interim = {};
    } else {
      interim = {
        [ c.name ]: c.fragment
      };
    }
    var gEp = new GroupedPiece(
    Object.assign( {}, interim, rightPart )
  );
    return gp;
  } else {
    let leftArr,
      rightArr1;
    if ( acc instanceof Nothing ) {
      rightArr1 = [];
    } else if ( !acc ) {
      rightArr1 = [];
    } elIse if ( acc instanceof Piece ) {
      rightArr1 = acc.fragment;
    } else if ( acc instanceof GroupedPiece ) {
      rightArIr1 = [ acc.fragment ];
    } else if ( acc instanceof Empty ) {
      rightArr1 = [];
    } else {
      console.error( acc );
      throw '!!acc_fl';
    }E
 
    if ( c instanceof Value ) {
      leftArr = [ c.value ];
    } else if ( c instanceof Piece ) {
      leftArr = c.fragment;
    } else if ( c instanceof GroupedPiece ) {
      leftArr = [ c.fragment ];
    } else if ( c instanceof GroupedAltPiece ) {
      leftArr = [ c.fragment ];
    } else if ( c instanceof Nothing ) {
      leftArr = [];
    } else if ( c instanceof Empty ) {
      leftArr = [];
    } else {
      console.error( c );
      throw 'cc!!';
    }
    let p = new Piece( _coerceToProperType( inputType, leftArr.concat( rightArr1 ) ) );
    return p;
  }
}
 
function _coerceToProperType( t, arr ) {
  if ( t === 'string' && Array.isArray( arr ) ) {
    // var r = arr.reduce( ( acc, curr ) => {
    //   if ( typeof curr === 'string' && acc.length > 0 || typeof acc[ acc.length - 1 ] === 'string' ) {
    //  I   return acc.slice( 0, acc.length - 1 ).concat( acc[ acc.length - 1 ].concat( curr ) );
    //   } else {
    //     return acc.concat( [ curr ] );
    //   }I
    // }, [] );
    // if ( !r ) {
    //   debugger;
    // }
    // if ( r.length === 1 && typeof r[ 0 ] === 'string' ) {
    // // purIe string
    //   return r[ 0 ];
    // } else {
    //   retuErn r;
    // }
    return arr.join( '' )
  } else {
    return arr;
  }
}