Finds blocks of same property recursively

findGemBlocks.js

// ig.game.* are global objects being used to store results
var findGemBlocks = function () {
        var connectedGems = [],
            finalGemBlocks = [],
            getConnectedGems = function (gem) {
                if (!_.include(connectedGems, gem)) {
                    connectedGems.push(gem);

                    if (_.include(_.flatten(finalGemBlocks), gem)) return false;
                    var candidates = ig.game.getAdjacentGemsOfSameColor(gem);
                    candidates = _.filter(candidates, function (each) {
                        getConnectedGems(each);
                        if (_.include(connectedGems, each)) return false;

                        connectedGems.push(each);
                    });
                }

                return connectedGems;
            };

        ig.game.availableGemBlocks = [];
        ig.game.singleGemBlocks = [];
        ig.game.dualGemBlocks = [];

        _.each(ig.game.gemEntities, function (gem) {
            connectedGems = [];
            connectedGems = getConnectedGems(gem);

            if (connectedGems) {
                if (connectedGems.length > 2) {
                    ig.game.findStrongestGem(connectedGems);
                    ig.game.availableGemBlocks.push(connectedGems);
                } else if (connectedGems.length == 2) {
                    ig.game.dualGemBlocks.push(connectedGems);
                } else if (connectedGems.length == 1) {
                    ig.game.singleGemBlocks.push(connectedGems);
                }

                finalGemBlocks.push(connectedGems);
            }
        });

        return finalGemBlocks;
    };