agson/lib/agson.js

Querying and manipulating JSON graphs

(function() {
  var AgsonQuery, combinators, lenses, liftL, traversals,
    __slice = [].slice;

  lenses = require('./agson/lenses');

  traversals = require('./agson/traversals');

  combinators = require('./agson/combinators');

  liftL = function(lensf) {
    return function() {
      var args;
      args = 1 <= arguments.length ? __slice.call(arguments, 0) : [];
      return new AgsonQuery(this.lens.then(lensf.apply(null, args)));
    };
  };

  AgsonQuery = (function() {
    function AgsonQuery(lens) {
      this.lens = lens;
    }

    AgsonQuery.prototype.toString = function() {
      return "agson(" + (this.lens.toString()) + ")";
    };

    AgsonQuery.prototype.list = liftL(function() {
      return traversals.list;
    });

    AgsonQuery.prototype.object = liftL(function() {
      return traversals.object;
    });

    AgsonQuery.prototype.property = liftL(lenses.property);

    AgsonQuery.prototype.index = liftL(lenses.property);

    AgsonQuery.prototype.where = liftL(function(predicate) {
      return combinators.where(function(ma) {
        return ma.map(predicate).getOrElse(false);
      });
    });

    AgsonQuery.prototype.recurse = function() {
      var lens;
      lens = this.lens.then(combinators.recurse(function() {
        return lens;
      }));
      return new AgsonQuery(lens);
    };

    AgsonQuery.prototype.run = function(data) {
      return this.lens.run(data);
    };

    return AgsonQuery;

  })();

  module.exports = new AgsonQuery({
    then: function(lens) {
      return lens;
    }
  });

}).call(this);