Save World POST To API

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Introduction

In this article, we will explore how to update the saveWorld function to post a new world object to the API, updating the database entry. We will also create a filter function that removes any additional attributes that were required for editing, such as bullet/number lists with ids that are only necessary for editing.

Current Implementation

Before we dive into the updates, let's take a look at the current implementation of the saveWorld function.

function saveWorld(world) {
  // Send a POST request to the API with the world object
  fetch('/api/worlds', {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json'
    },
    body: JSON.stringify(world)
  })
  .then(response => response.json())
  .then(data => console.log(data))
  .catch(error => console.error(error));
}

Updating the saveWorld Function

To update the saveWorld function to post a new world object to the API, we need to make the following changes:

  • Send a POST request to the API with the world object
  • Update the database entry with the new world object

Here's the updated implementation:

function saveWorld(world) {
  // Create a filter function to remove additional attributes
  const filterFunction = (obj) => {
    // Remove bullet/number lists with ids
    if (obj.type === 'list' && obj.id) {
      delete obj.id;
    }
    // Recursively filter the object
    if (typeof obj === 'object') {
      for (const key in obj) {
        if (Object.prototype.hasOwnProperty.call(obj, key)) {
          obj[key] = filterFunction(obj[key]);
        }
      }
    }
    return obj;
  };

  // Filter the world object
  const filteredWorld = filterFunction(world);

  // Send a POST request to the API with the filtered world object
  fetch('/api/worlds', {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json'
    },
    body: JSON.stringify(filteredWorld)
  })
  .then(response => response.json())
  .then(data => console.log(data))
  .catch(error => console.error(error));
}

Filter Function Explanation

The filter function filterFunction takes an object as an argument and recursively removes any additional attributes that were required for editing. Here's a step-by-step explanation of how it works:

  1. Check if the object is a bullet/number list with an id. If it is, remove the id.
  2. If the object is an array, recursively filter each item in the array.
  3. If the object is an object, recursively filter each property in the object.
  4. Return the filtered object.

Example Use Case

Here's an example use case for the updated saveWorld function:

const world = {
  name: 'My World',
  description: 'This is my world',
  features: [
    {
      type: 'list',
      id: 1,
      items: ['Feature 1', 'Feature 2', 'Feature 3']
    },
    {
      type: 'list',
      id:2,
      items: ['Feature 4', 'Feature 5', 'Feature 6']
    }
  ]
};

saveWorld(world);

In this example, the saveWorld function will send a POST request to the API with the filtered world object, which will remove the ids from the bullet/number lists.

Conclusion

In this article, we updated the saveWorld function to post a new world object to the API, updating the database entry. We also created a filter function that removes any additional attributes that were required for editing. This update will improve the functionality of the saveWorld function and ensure that only the necessary data is sent to the API.

API Documentation

Here's an example of what the API documentation for the saveWorld function might look like:

### POST /api/worlds

*   **Request Body:** `world` object
*   **Response:** `world` object with updated database entry
*   **Error Handling:** Returns a JSON error object with a 400 status code if the request body is invalid

Commit Message

Here's an example of what the commit message for this update might look like:

"Update saveWorld function to post new world object to API and remove additional attributes"
```<br/>
**Q&A: Save World POST to API**
==========================

**Introduction**
---------------

In our previous article, we explored how to update the `saveWorld` function to post a new world object to the API, updating the database entry. We also created a filter function that removes any additional attributes that were required for editing. In this article, we will answer some frequently asked questions about the `saveWorld` function and its implementation.

**Q: What is the purpose of the filter function?**
--------------------------------------------

A: The filter function is used to remove any additional attributes that were required for editing, such as bullet/number lists with ids. This ensures that only the necessary data is sent to the API.

**Q: How does the filter function work?**
-----------------------------------------

A: The filter function recursively checks each object in the world object and removes any additional attributes that were required for editing. It checks for bullet/number lists with ids and removes the id. It also recursively filters any arrays or objects within the world object.

**Q: What is the difference between the old and new implementations of the `saveWorld` function?**
---------------------------------------------------------------------------------------------

A: The old implementation of the `saveWorld` function sent a POST request to the API with the entire world object, including any additional attributes that were required for editing. The new implementation uses the filter function to remove these additional attributes before sending the request to the API.

**Q: How do I use the `saveWorld` function?**
--------------------------------------------

A: To use the `saveWorld` function, simply call it with a world object as an argument. For example:

```javascript
const world = {
  name: 'My World',
  description: 'This is my world',
  features: [
    {
      type: 'list',
      id: 1,
      items: ['Feature 1', 'Feature 2', 'Feature 3']
    },
    {
      type: 'list',
      id:2,
      items: ['Feature 4', 'Feature 5', 'Feature 6']
    }
  ]
};

saveWorld(world);

Q: What if I have a complex world object with many nested arrays and objects?

A: The filter function is designed to handle complex world objects with many nested arrays and objects. It will recursively filter each object and array, removing any additional attributes that were required for editing.

Q: Can I customize the filter function to remove different types of attributes?

A: Yes, you can customize the filter function to remove different types of attributes. For example, you could add a check to remove any additional attributes that are marked with a specific key.

Q: What if I encounter an error while using the saveWorld function?

A: If you encounter an error while using the saveWorld function, it will return a JSON error object with a 400 status code. You can handle this error in your application by checking the response status code and handling the error accordingly.

Conclusion

In this article, we answered some frequently asked questions about the saveWorld function and its implementation. We covered topics such as the purpose of the filter function, how it works, and how to use the saveWorld. We also discussed how to handle errors and customize the filter function to remove different types of attributes.

API Documentation

Here's an example of what the API documentation for the saveWorld function might look like:

### POST /api/worlds

*   **Request Body:** `world` object
*   **Response:** `world` object with updated database entry
*   **Error Handling:** Returns a JSON error object with a 400 status code if the request body is invalid

Commit Message

Here's an example of what the commit message for this update might look like:

"Update saveWorld function to post new world object to API and remove additional attributes"