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Register Product Collection

The __experimentalRegisterProductCollection function is part of the @woocommerce/blocks-registry package. This function allows 3PDs to register a new collection. This function accepts most of the arguments that are accepted by Block Variation.

[!WARNING] It's experimental and may change in the future. Please use it with caution.

There are two ways to use this function:

Using @woocommerce/dependency-extraction-webpack-plugin in a Webpack configuration: This will allow you to import the function from the package & use it in your code. For example:
```
import { __experimentalRegisterProductCollection } from "@woocommerce/blocks-registry";
```
Using the global wc object: This will allow you to use the function using the global JS object without importing it. For example:
```
wc.wcBlocksRegistry.__experimentalRegisterProductCollection({
...
});
```

[!TIP] The first method is recommended if you are using Webpack.

Defining a Collection

We will explain important arguments that can be passed to __experimentalRegisterProductCollection. For other arguments, you can refer to the Block Variation documentation.

A Collection is defined by an object that can contain the following fields:

name (type string): A unique and machine-readable collection name. We recommend using the format <plugin-name>/product-collection/<collection-name>. Both <plugin-name> and <collection-name> should consist only of alphanumeric characters and hyphens (e.g., my-plugin/product-collection/my-collection).
title (type string): The title of the collection, which will be displayed in various places including the block inserter and collection chooser.
description (optional, type string): A human-readable description of the collection.
innerBlocks (optional, type Array[]): An array of inner blocks that will be added to the collection. If not provided, the default inner blocks will be used.
isDefault: ⚠️ It's set to false for all collections. 3PDs doesn't need to pass this argument.
isActive: ⚠️ It will be managed by us. 3PDs doesn't need to pass this argument.

Attributes

Attributes are the properties that define the behavior of the collection. All the attributes are optional. Here are some of the important attributes that can be passed to __experimentalRegisterProductCollection:

query (type object): The query object that defines the query for the collection. It can contain the following fields:
- offset (type number): The number of items to offset the query by.
- order (type string): The order of the query. Accepted values are asc and desc.
- orderBy (type string): The field to order the query by.
- pages (type number): The number of pages to query.
- perPage (type number): The number of products per page.
- search (type string): The search term to query by.
- taxQuery (type object): The tax query to filter the query by. For example, if you wanna fetch products with category Clothing & Accessories and tag Summer then you can pass taxQuery as {"product_cat":[20,17],"product_tag":[36]}. Where array values are the term IDs.
- featured (type boolean): Whether to query for featured items.
- timeFrame (type object): The time frame to query by.
  - operator (type string): The operator to use for the time frame query. Accepted values are in and not-in.
  - value (type string): The value to query by. It should be a valid date string that PHP's strtotime function can parse.
- woocommerceOnSale (type boolean): Whether to query for items on sale.
- woocommerceStockStatus (type array): The stock status to query by. Some of the accepted values are instock, outofstock, onbackorder.
- woocommerceAttributes (type array): The attributes to query by.
  - For example, if you wanna fetch products with color blue & gray and size Large then you can pass woocommerceAttributes as [{"termId":23,"taxonomy":"pa_color"},{"termId":26,"taxonomy":"pa_size"},{"termId":29,"taxonomy":"pa_color"}].
- woocommerceHandPickedProducts (type array): The hand-picked products to query by. It should contain the product IDs.
- priceRange (type object): The price range to query by.
  - min (type number): The minimum price.
  - max (type number): The maximum price.
displayLayout (type object): The display layout object that defines the layout of the collection. It can contain the following fields:
- type (type string): The type of layout. Accepted values are grid and stack.
- columns (type number): The number of columns to display.
- shrinkColumns (type boolean): Whether the layout should be responsive.
hideControls (type array): The controls to hide. Possible values:
- order - "Order by" setting
- attributes - "Product Attributes" filter
- created - "Created" filter
- featured - "Featured" filter
- hand-picked - "Hand-picked Products" filter
- keyword - "Keyword" filter
- on-sale - "On Sale" filter
- stock-status - "Stock Status" filter
- taxonomy - "Product Categories", "Product Tags" and custom taxonomies filters
- price-range - "Price Range" filter

Preview Attribute

The preview attribute is optional, and it is used to set the preview state of the collection. It can contain the following fields:

initialPreviewState (type object): The initial preview state of the collection. It can contain the following fields:
- isPreview (type boolean): Whether the collection is in preview mode.
- previewMessage (type string): The message to be displayed in the Tooltip when the user hovers over the preview label.
setPreviewState (optional, type function): The function to set the preview state of the collection. It receives the following arguments:
- setState (type function): The function to set the preview state. You can pass a new preview state to this function containing isPreview and previewMessage.
- attributes (type object): The current attributes of the collection.
- location (type object): The location of the collection. Accepted values are product, archive, cart, order, site.

For more info, you may check PR #46369, in which the Preview feature was added

Examples

Example 1: Registering a new collection

__experimentalRegisterProductCollection({
  name: "your-plugin-name/product-collection/my-custom-collection",
  title: "My Custom Collection",
  icon: "games",
  description: "This is a custom collection.",
  keywords: ["custom collection", "product collection"],
});

As you can see in the example above, we are registering a new collection with the name woocommerce/product-collection/my-custom-collection & title My Custom Collection. Here is screenshot of how it will look like:

Example 2: Register a new collection with a preview

As you can see below, setting the initial preview state is possible. In the example below, we are setting isPreview and previewMessage.

__experimentalRegisterProductCollection({
  name: "your-plugin-name/product-collection/my-custom-collection-with-preview",
  title: "My Custom Collection with Preview",
  icon: "games",
  description: "This is a custom collection with preview.",
  keywords: ["My Custom Collection with Preview", "product collection"],
  preview: {
    initialPreviewState: {
      isPreview: true,
      previewMessage:
        "This is a preview message for my custom collection with preview.",
    },
  },
  attributes: {
    query: {
      perPage: 5,
      featured: true,
    },
    displayLayout: {
      type: "grid",
      columns: 3,
      shrinkColumns: true,
    },
	hideControls: [ "created", "stock-status" ]
  },
});

Here is how it will look like:

Example 3: Advanced usage of preview

As you can see below, it's also possible to use setPreviewState to set the preview state. In the example below, we are setting initialPreviewState and using setPreviewState to change the preview state after 5 seconds.

This example shows:

How to access current attributes and location in the preview state
How to use async operations - We are using setTimeout to change the preview state after 5 seconds. You can use any async operation, like fetching data from an API, to decide the preview state.
How to use the cleanup function as a return value - We are returning a cleanup function that will clear the timeout after the component is unmounted. You can use this to clean up any resources you have used in setPreviewState.

__experimentalRegisterProductCollection({
  name: "your-plugin-name/product-collection/my-custom-collection-with-advanced-preview",
  title: "My Custom Collection with Advanced Preview",
  icon: "games",
  description: "This is a custom collection with advanced preview.",
  keywords: [
    "My Custom Collection with Advanced Preview",
    "product collection",
  ],
  preview: {
    setPreviewState: ({
      setState,
      attributes: currentAttributes,
      location,
    }) => {
      // setPreviewState has access to the current attributes and location.
      // console.log( currentAttributes, location );

      const timeoutID = setTimeout(() => {
        setState({
          isPreview: false,
          previewMessage: "",
        });
      }, 5000);

      return () => clearTimeout(timeoutID);
    },
    initialPreviewState: {
      isPreview: true,
      previewMessage:
        "This is a preview message for my custom collection with advanced preview.",
    },
  },
});

Example 4: Collection with inner blocks

As you can see below, it's also possible to define inner blocks for the collection. In the example below, we are defining inner blocks for the collection.

__experimentalRegisterProductCollection({
  name: "your-plugin-name/product-collection/my-custom-collection-with-inner-blocks",
  title: "My Custom Collection with Inner Blocks",
  icon: "games",
  description: "This is a custom collection with inner blocks.",
  keywords: ["My Custom Collection with Inner Blocks", "product collection"],
  innerBlocks: [
    [
      "core/heading",
      {
        textAlign: "center",
        level: 2,
        content: "Title of the collection",
      },
    ],
    [
      "woocommerce/product-template",
      {},
      [
        ["woocommerce/product-image"],
        [
          "woocommerce/product-price",
          {
            textAlign: "center",
            fontSize: "small",
          },
        ],
      ],
    ],
  ],
});

This will create a collection with a heading, product image, and product price. Here is how it will look like:

![TIP] You can learn more about inner blocks template in the Inner Blocks documentation.

![TIP] You can also take a look at how we are defining our core collections at plugins/woocommerce-blocks/assets/js/blocks/product-collection/collections directory. Our core collections will also evolve over time.

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