csballz/koala-puree

module.exports = exports = function(dust){
    var _ = require("lodash");
    var moment = require("./moment_helpers.js");
    var self = this;
    dust.helpers["route"] = function(chunk, context, bodies, params){
        var path = params.route;
        if ( self._ns && self._ns !== "/" ) {
            chunk.write(self._ns);
        }
        return _.isFunction(path) ? path(chunk, context) : chunk.write(path);
    };
    dust.helpers.env = function(chunk, context, bodies, params) {
        params.env = params.env || "dev";
        var env = process.env.NODE_ENV || "dev";
        if (params.env === env){
            bodies.block(chunk,context);
        }
        return chunk.write("");
    };
    dust.helpers["form"] = function(chunk, context, bodies, params){
        var path = params.route, method, hiddenmethod, enctype;
        if ( params.method ) {
            method = params.method;
        }
        if ( params.model ) {
            hiddenmethod = "put";
        }
        enctype = params.enctype || "application/x-www-form-urlencoded";

        method = method || "post";

        method = dust.helpers.tap(method, chunk, context);
        method = method.toLowerCase();
        if ( method !== "get" && method !== "post") {
            hiddenmethod = method;
            method = "post";
        }
        chunk.write("<form method=\"");
        chunk.write(method);

        chunk.write("\" action=\"");
        if ( self._ns && self._ns !== "/" ) {
            chunk.write(self._ns);
        }
        _.isFunction(path) ? path(chunk, context) : chunk.write(path);

        chunk.write("\" enctype=\"");
        _.isFunction(enctype) ? enctype(chunk, context) : chunk.write(enctype);
        if ( params.class ) {
            chunk.write("\" class=\"");
            _.isFunction(params.class) ? params.class(chunk, context) : chunk.write(params.class);
        }
        chunk.write("\">");
        if ( hiddenmethod ) {
            chunk.write("<input type=\"hidden\" name=\"_method\" value=\""+hiddenmethod+"\"/>");
        }
        if ( method !== "get" && method !== "head" ) {
            chunk.write("<input type=\"hidden\" name=\"_csrf\" value=\"\"/>");
        }
        if ( bodies.block ) {
            bodies.block(chunk, context);
        }
        return chunk.write("</form>");

    };
    dust.helpers["param"] = function(chunk, context, bodies, params) {
        var name = dust.helpers.tap(params.name, chunk, context);
        var attr = dust.helpers.tap(params.value, chunk, context);
        if ( !attr ) {
            context.current()[name]=function(chunk){
                bodies.block(chunk, context);
                return chunk;
            };
        } else {
            context.current()[name] = attr;
        }

        return chunk;
    };
    dust.helpers["date"] = function(chunk, context, bodies,params) {
        var key;
        if ( params.key ) {
            key = dust.helpers.tap(params.key, chunk, context);
        }
        var format = dust.helpers.tap(params.format, chunk, context);

        return chunk.write(moment(key).format(format));
    };
    dust.helpers.loop = function(chunk, context, bodies, params) {
        var from = parseInt(dust.helpers.tap(params.from, chunk, context), 10),
            to = parseInt(dust.helpers.tap(params.to, chunk, context), 10);
        from = ( isNaN(from) ) ? 1 : from;
        to = ( isNaN(to) ) ? 1 : to;
        var len = Math.abs(to - from) + 1,
            increment = (to - from) / (len - 1) || 1;

        while(from !== to) {
            chunk = bodies.block(chunk, context.push(from, from, len));
            from += increment;
        }

        return chunk.render(bodies.block, context.push(from, from, len));
    };
};