Interaction between Node-RED Editor and Runtime

General
1

Hi Nick,
hi Node-RED-Developers,

maybe you could help me and share with me some backgrounds of Node-RED. My question is: How is the interaction between the Node-RED-Editor and the Node-RED-Runtime?

As I understood right:
1. In the graphical Node-RED-Editor a program configuration is composed, which is passed to the Node-RED-Runtime in the form of an array of Json objects.

[
    {
        "id": "926a347b.eed998",
        "type": "inject",
        "z": "dee51ddf.5dbb2",
        "name": "",
        "props": [
            {
                "p": "payload"
            },
            {
                "p": "topic",
                "vt": "str"
            }
        ],
        "repeat": "",
        "crontab": "",
        "once": false,
        "onceDelay": 0.1,
        "topic": "",
        "payload": "",
        "payloadType": "date",
        "x": 190,
        "y": 140,
        "wires": [
            [
                "f9e9096a.d22448"
            ]
        ]
    },
    {
        "id": "f9e9096a.d22448",
        "type": "debug",
        "z": "dee51ddf.5dbb2",
        "name": "",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "false",
        "statusVal": "",
        "statusType": "auto",
        "x": 350,
        "y": 140,
        "wires": []
    }
]

2. The runtime goes through the array step by step and registers the corresponding Javascript modules with the appropriate configuration.

module.exports = function(RED) {
    function LowerCaseNode(config) {
        RED.nodes.createNode(this,config);
        var node = this;
        node.on('input', function(msg) {
            msg.payload = msg.payload.toLowerCase();
            node.send(msg);
        });
    }
    RED.nodes.registerType("lower-case",LowerCaseNode);
}

3. And then the JSON-parameter "wires" will be used to route the messages.

Where can I find step 2 (the registration) and step 3 (the message-routing) within the node-red core on github?

I think the API for step 2 (the registration) is the following:
https://nodered.org/docs/api/modules/v/1.3/@node-red_registry.html

Best regards from Germany

Andreas

2

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