tumble/lib/parser.js

// Generated by CoffeeScript 1.6.1
(function() {
  var Contexter, _;

  _ = require('underscore');

  Contexter = (function() {

    function Contexter(content) {
      this.content = content;
      this.stack = [this.content];
      this.templates = {};
      this.depth = 0;
    }

    Contexter.prototype.has_any = function(name) {
      return _.find(this.stack, function(o) {
        return _.has(o, name);
      });
    };

    Contexter.prototype.has_any_one = function(name) {
      var p;
      p = this.has_any(name);
      if (p) {
        return p[name];
      } else {
        return null;
      }
    };

    Contexter.prototype.has = function(name) {
      if (this.stack[0][name] != null) {
        return this.stack[0][name];
      } else {
        return null;
      }
    };

    Contexter.prototype.get = function(name, alt) {
      var p;
      if (alt == null) {
        alt = '';
      }
      p = this.has_any_one(name);
      if (p && (_.isString(p) || _.isNumber(p))) {
        return p;
      }
      return this.render(name);
    };

    Contexter.prototype.once = function(obj, cb) {
      var r;
      this.stack.unshift(obj);
      this.depth++;
      if (this.depth > 10) {
        throw new Error('recursion-error');
      }
      r = cb(this);
      this.stack.shift();
      this.depth--;
      return r;
    };

    Contexter.prototype.when = function(name, cb) {
      var p;
      p = this.has_any_one(name);
      if (p) {
        return cb(this);
      } else {
        return '';
      }
    };

    Contexter.prototype["if"] = function(name, cb) {
      var p;
      p = this.has(name);
      if (p) {
        return cb(this);
      } else {
        return '';
      }
    };

    Contexter.prototype.block = function(name, cb) {
      var p;
      p = this.has_any_one(name);
      if (p && _.isObject(p)) {
        return this.once(p, cb);
      } else {
        return '';
      }
    };

    Contexter.prototype.many = function(name, cb) {
      var ps,
        _this = this;
      ps = this.has(name);
      if (!(ps && _.isArray(ps))) {
        return "";
      }
      return (_.map(ps, function(p) {
        return _this.once(p, cb);
      })).join('');
    };

    Contexter.prototype.template = function(name, cb) {
      this.templates[name] = cb;
      return "";
    };

    Contexter.prototype.render = function(name) {
      var ret;
      if ((this.templates[name] != null) && _.isFunction(this.templates[name])) {
        this.depth++;
        if (this.depth > 10) {
          throw new Error('recursion-error');
        }
        ret = this.templates[name](this);
        this.depth--;
        return ret;
      } else {
        return "";
      }
    };

    return Contexter;

  })();

  module.exports = function(ast, data) {
    var cmd, context, o;
    context = new Contexter(data);
    cmd = function(o) {
      switch (o.unit) {
        case 'variable':
          return function(context) {
            return context.get(o.name);
          };
        case 'text':
          return function(context) {
            return o.content;
          };
        case 'block':
          return function(context) {
            return context[o.type](o.name, function(context) {
              var p;
              return ((function() {
                var _i, _len, _ref, _results;
                _ref = o.content;
                _results = [];
                for (_i = 0, _len = _ref.length; _i < _len; _i++) {
                  p = _ref[_i];
                  _results.push(cmd(p)(context));
                }
                return _results;
              })()).join("");
            });
          };
      }
    };
    return ((function() {
      var _i, _len, _ref, _results;
      _ref = ast.content;
      _results = [];
      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
        o = _ref[_i];
        _results.push(cmd(o)(context));
      }
      return _results;
    })()).join("");
  };

}).call(this);