'use strict';

var Node = require(__dirname);

var JoinNode = module.exports = Node.define({

type: 'JOIN',

constructor: function(subType, from, to) {

Node.call(this);

if (subType.type === 'JOIN') {

// implement copy constructor

var other = subType;

this.subType = other.subType;

this.from = other.from;

this.to = other.to;

this.on = other.on;

} else {

this.subType = subType;

this.from = from.toNode();

this.to = to.toNode();

}

},

on: function(node) {

var mutated = new JoinNode(this);

mutated.on = node;

return mutated;

},

join: function(other) {

return new JoinNode('INNER', this, other);

},

leftJoin: function(other) {

return new JoinNode('LEFT', this, other);

}

});