Customizes the homepage to show topics based on user interests

Development
3

I believe that in order to handle user interests and integrate them in user preferences, the required routes, controller actions, and templates must be created.

However, that’s just my viewpoint, and it’s simply designed. I have not yet begun construction on it. It might not go as planned if I attempt.

Add a Route for User Preferences:
- Add a route that will handle requests to /u/:username/preferences/interests.

```ruby
# plugins/custom_homepage/config/routes.rb
Discourse::Application.routes.append do
  get '/u/:username/preferences/interests' => 'custom_homepage#interests', constraints: { username: /[^\/]+/ }
end
```

Create the Controller Action:
- Define a controller to handle the request and fetch the user’s interests.

```ruby
# plugins/custom_homepage/app/controllers/custom_homepage_controller.rb
class CustomHomepageController < ApplicationController
  requires_login
  
  def interests
    username = params[:username]
    user = User.find_by(username: username)
    
    if user
      render json: {
        interests: user.custom_fields['interests']
      }
    else
      render json: { error: 'User not found' }, status: 404
    end
  end
end
```

Add Interests Field in User Preferences:
- Modify the user preferences template to include an input for interests.

```html
<!-- plugins/custom_homepage/assets/javascripts/discourse/connectors/user-preferences/interests.hbs -->
<div class="control-group">
  <label class="control-label">{{i18n 'user.preferences.interests'}}</label>
  <div class="controls">
    {{input value=model.custom_fields.interests class="form-control"}}
  </div>
</div>
```

Extend the Serializer:
- Extend the user serializer to include the interests field.

```ruby
# plugins/custom_homepage/plugin.rb

after_initialize do
  User.register_custom_field_type('interests', :string)
  
  add_to_serializer(:current_user, :interests) do
    object.custom_fields['interests']
  end

  add_to_serializer(:admin_detailed_user, :interests) do
    object.custom_fields['interests']
  end
end
```

Modify the JavaScript for Handling Interests:
- Use JavaScript to fetch and save the interests to the user profile.

```javascript
// plugins/custom_homepage/assets/javascripts/discourse/initializers/custom-homepage.js.es6

import { withPluginApi } from 'discourse/lib/plugin-api';

export default {
  name: 'custom-homepage',
  initialize(container) {
    withPluginApi('0.8', api => {
      api.modifyClass('controller:preferences/account', {
        save() {
          const interests = this.model.custom_fields.interests;
          this.model.save().then(() => {
            fetch(`/u/${this.model.username}/preferences/interests`, {
              method: 'PUT',
              headers: {
                'Content-Type': 'application/json',
                'X-CSRF-Token': Discourse.CSRFToken
              },
              body: JSON.stringify({ interests })
            }).then(response => response.json()).then(() => {
              this.flash('Your preferences have been saved.');
            });
          });
        }
      });
    });
  }
};
```

  1. Handle the PUT Request:

    • Implement the logic to handle the PUT request and save the interests in the controller.
    # plugins/custom_homepage/app/controllers/custom_homepage_controller.rb
class CustomHomepageController < ApplicationController
  requires_login

  def interests
    if request.get?
      username = params[:username]
      user = User.find_by(username: username)
      
      if user
        render json: {
          interests: user.custom_fields['interests']
        }
      else
        render json: { error: 'User not found' }, status: 404
      end
    elsif request.put?
      user = current_user
      interests = params[:interests]
      user.custom_fields['interests'] = interests
      user.save_custom_fields
      render json: success_json
    end
  end
end