Catalyst Redux

State management utilities for Redux.

⚠️ Definitely a WIP ⚠️

Getting Started

Creating a Configuration

import {
  Configuration,
  ResourceClass,
  attributes,
  relationships
} from '@ftw/redux-resources';

const Post = ResourceClass({
  type: 'posts',
  attributes: {
    title: attributes.string,
    content: attributes.string,
    publishedAt: attributes.date
  },
  relationships: {
    comments: relationships.hasMany('comments', {
      inverse: 'post'
    })
  }
});

const Comment = ResourceClass({
  type: 'comments',
  attributes: {
    content: attributes.string
  },
  relationships: {
    post: relationships.hasOne('post', {
      inverse: 'comments'
    })
  }
});

const ResourcesConfiguration = new Configuration([Post, Comment]);

Providing the Configuration

The <Provider /> component is used to give any component in your application access to your Configuration instance via React's context feature. It must either be a descendent of react-redux's <Provider /> or have the Redux store passed in via its store prop.

import { Provider } from 'react-redux';
import { Configuration, Provider as ResourcesProvider } from 'catalyst-redux';

const ResourcesConfiguration = new Configuration([Post, Comment]);

function Application() {
  return (
    <Provider store={store}>
      <ResourcesProvider configuration={ResourcesConfiguration}>
        {/* Your app goes here. */}
      </ResourcesProvider>
    </Provider>
  );
}

Configuration Options

Request Options

The requests made and responses received by a resource module can be transformed by passing an options object to Configuration:

import { Configuration } from 'catalyst-redux';

const Resources = new Configuration(
  [
    // Resource classes
  ],
  {
    transformRequest({ data, headers }) {
      headers = { ...headers, Authorization: 'Bearer 1234567890' };

      return { data, headers };
    },
    transformResponse(data) {
      return { ...data };
    }
  }
);

Actions

findAllAction(resourceClass: Class, ?options: Object)

Example:

Resources.findAllAction(Post, {
  filter: {
    authorId: 7
  },
  include: ['comments']
});

createAction(resourceClass: Class, attributes: Object, ?options: Object)

Example:

Resources.createAction(
  Comment,
  { content: 'First!' },
  {
    relationships: {
      post: { type: 'posts', id: '1' }
    }
  }
);

updateAction(resourceClass: Class, resourceID: number | string, attributes: Object, ?options: Object)

Example:

Resources.updateAction(
  Comment,
  6,
  { content: 'Something meaningful.' },
  {
    relationships: {
      post: { type: 'posts', id: '1' }
    }
  }
);

The connectResources HOC

This higher-order component allows you to easily fetch multiple resources and pass them down to the wrapped component as props.

import { connectResources } from 'catalyst-redux';

class TodoList extends React.PureComponent {
  componentDidMount() {
    this.findResources();
  }

  render() {
    <ul>{this.props.items.map(() => <li>{item.content}</li>)}</ul>;
  }
}

connectResources(props => {
  return {
    currentUser: { type: User, id: props.currentUserID },
    items: { type: TodoItem }
  };
})(TodoList);

const ConnectedPostsIndex = connectResources(props => {
  return {
    posts: {
      type: Post,
      options: {
        include: 'comments',
        filterResults: post => post.tags.contains(props.tag)
      }
    }
  };
})(PostsIndex);

<ConnectedPostsIndex tag="featured" />;

The connectResource HOC

This higher-order component allows you to easily build components which can both create new resources and update/destroy existing resources. The wrapped component (CommentForm in the following example), is passed these props by connectResource:

resource: Object | null

resourceStatus: string | null

onCreate: (attributes: Object, options?: Object) => void Dispatches an action to create a resource using the passed attributes.

onUpdate: (attributes: Object, options?: Object) => void Dispatches an action to update the resource using the passed attributes.

onDestroy: () => void Dispatches an action to destroy the resource.

import { Resource, connectResource } from 'catalyst-redux';
import type { ResourceProvidedProps } from 'catalyst-redux';

class Comment extends Resource {
  static type = 'comments';
}

type Props = ResourceProvidedProps;

class CommentForm extends React.PureComponent<Props> {
  state = { content: '' };

  handleChange = event => {
    this.setState({ content: event.currentTarget.value });
  };

  handleSubmit = event => {
    event.preventDefault();

    this.props.onCreate({
      content: this.state.content
    });
  };

  render() {
    return (
      <form onSubmit={this.handleSubmit}>
        <textarea value={this.state.content} onChange={this.handleChange} />

        <button>Add Comment</button>
      </form>
    );
  }
}

const ConnectedCommentForm = connectResource(Comment)(CommentForm);

The connectResourceForm HOC

This HOC makes it easy to store temporary state for a resource's attributes before the resource is created/updated. The wrapped component is passed these props in addition to the ones provided by connectResource:

onSave: (eventOrOptions?: SyntheticEvent<*> | Object = {}, options?: Object = {}) => void Calls either onSave or onCreate depending on the state of the resource. Optionally accepts an event as the first argument and calls preventDefault (which allows it to be used directly in a form's onSubmit).

onReset: () => void Clears the stored attribute values, effectively resetting the form.

inputProps: (key: string) => { value: string, onChange: (event: SyntheticInputEvent<*>) => void } Given the name of an attribute, it returns an object with value and onChange props which can be spread onto an <input />, <select />, etc.

import { Resource, connectResourceForm } from 'catalyst-redux';
import type { ResourceFormProvidedProps } from 'catalyst-redux';

class Post extends Resource {
  static type = 'posts';
}

type Props = ResourceFormProvidedProps;

const PostForm = ({ onSave, onReset, inputProps }: Props) => {
  return (
    <form onSubmit={onSave}>
      <label for="title">Title</label>
      <input id="title" type="text" {...inputProps('title')} />

      <label for="content">Content</label>
      <textarea id="content" {...inputProps('content')} />

      <button type="submit">Save</button>
      <button type="button" onClick={onReset}>
        Reset
      </button>
    </form>
  );
};

const ConnectedPostForm = connectResourceForm(Post)(PostForm);

The ConnectedPostForm component can now be used to either create a new post:

<ConnectedPostForm />

or to edit an existing one:

<ConnectedPostForm resourceID={4} />