node-red-contrib-smartnode/io/disp.js

this project is a nodejs package for making the nodered support the Smart Device development. the pacakge require node-red enviroment.

/**
 * Copyright 2015, 2015 MakerCollider.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 **/
var atlas = global.atlas;
var ejs = require('ejs');
var fs = require('fs');
var jslib = require('jsupm_img2base64');

module.exports = function(RED) {
    var domain = require('domain');

    var d = domain.create();

    d.on('error', function(e) {
        console.log("error in dispImg:", e);
    });
    function dispImg(config) {
        RED.nodes.createNode(this, config);
        var img2Base64 = new jslib.Cimg2Base64();
        var node = this;
        var name = config.name;

        node.on('input', function(msg) {
            d.run(function () {
                process.nextTick(function () {
                    //throw new Error("exception in nextTick callback");
                    if((typeof msg.imagePtr) != "string")
                    {
                        this.log("Input Error! Wrong Topic");
                        node.status({fill:"red", shape:"dot", text:"InputError"});
                    }
                    else
                    {
                        var result = img2Base64.noderedBase64(msg.imagePtr);
                        if(result == -1)
                        {
                            this.log("Input Error! Wrong String Format");
                            node.status({fill:"red", shape:"dot", text:"WrongFormat"});                   
                        }
                        var msg1 = {payload: img2Base64.m_outputString};
                        //node.send(msg1);
                        atlas.emit(name, msg1.payload);
                    }
                });
            });
            
            /*
            if(typeof msg == "object" && msg['payload'] != undefined) {
                atlas.emit(name, msg1.payload);
            } else {
                atlas.emit(name, msg1);
            }*/
        });  

        atlas.genHtml.save({
            'name': 'dispImg',
            'html': 'dispImg.html'
        });
    }

    RED.nodes.registerType("dispImg", dispImg);

    function dispGauge(config) {
        console.log
        RED.nodes.createNode(this, config);
        var node = this;
        var name = config.name;

        node.on('input', function(data) {
            if(typeof data == "object" && data['payload'] != undefined) {
                atlas.emit(name, data.payload);
            } else {
                atlas.emit(name, data);
            }
        });  

        var buf = fs.readFileSync(__dirname + '/dispGauge.ejs').toString();

        var bufHtml = ejs.render(buf, {'config': config});
        fs.writeFileSync(atlas.htmlDir + '/' + name + '.html', bufHtml);

        atlas.genHtml.save({
            'name': name,
            'html': name + '.html',
            'width': 320,
            'height': 180
        });
    }

    RED.nodes.registerType("dispGauge", dispGauge);    

};