### Parse Node-RED Flow from File

Source: https://github.com/node-red/flow-parser/blob/main/README.md

This snippet demonstrates the basic usage of `@node-red/flow-parser` to load a Node-RED flow JSON from a local file and parse it into a structured object. It shows how to read the file content, parse it as JSON, and then use `parseFlow` to get a manipulable flow object.

```javascript
const fs = require("fs");
const { parseFlow } = require("@node-red/flow-parser");

// Load the flow json from a local file and parse to an object
const exampleFlow = JSON.parse(fs.readFileSync("flows.json", "utf-8"));

// Parse the flow
const flow = parseFlow(exampleFlow);

// `flow` is now an object that can be used to explore the flow structure
```

--------------------------------

### Traverse Node-RED Flow Objects with `walk`

Source: https://github.com/node-red/flow-parser/blob/main/README.md

This example illustrates how to use the `walk` function to iterate over every object within a parsed Node-RED flow. It demonstrates how to identify different types of flow components (Flow, Subflow, Group, ConfigNode, Node) using `FlowParser.types` and perform actions based on their type, providing a structured way to process flow elements.

```javascript
const fs = require("fs");
const FlowParser = require("@node-red/flow-parser");

// Load the flow json from a local file and parse to an object
const exampleFlow = JSON.parse(fs.readFileSync("flows.json", "utf-8"));

const flow = FlowParser.parseFlow(exampleFlow);

flow.walk(function(obj) {
    switch(obj.TYPE) {
        case FlowParser.types.Flow:
            // A flow object
            break;
        case FlowParser.types.Subflow:
            // A subflow definition
            break;
        case FlowParser.types.Group:
            // A group object
            break;
        case FlowParser.types.ConfigNode:
            // A config node
            break;
        case FlowParser.types.Node:
            // A flow node
            break;
    }
})
```

--------------------------------

### Export Modified Node-RED Flow

Source: https://github.com/node-red/flow-parser/blob/main/README.md

This snippet demonstrates how to modify a parsed Node-RED flow and then export the changes back into a standard JSON array format. Specifically, it shows how to use the `walk` function to find and disable all 'debug' nodes within the flow, followed by calling the `export` function to generate the updated flow configuration.

```javascript
const flow = parseFlow(exampleFlow);

flow.walk(obj => {
    if (obj.type === 'debug') {
        obj.active = false;
    }
});

const newFlow = flow.export();
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.