Register and add settings page

👸🏻: Let's break down your ideas based on the **"Register and add settings page"** file you shared and explore ways to incorporate licensing, custom post types, and toggles on the settings page.

### Key Points from the File:
1. **Settings Page Structure**:
   - You have a clear framework to add settings, which includes registering options, adding fields, and sanitizing input.
   - This is an excellent base for further expansion.

2. **What You Want**:
   - **Licensing/Key Registration**: You want a licensing system where you can store and validate a key.
   - **Custom Post Types**: A section to manage custom post types.
   - **General Settings**: A first column for turning on/off features like Gutenberg, custom blocks, etc.
   - **Toggle Switches**: Display options as toggle switches instead of traditional checkboxes for a more modern interface.

---

### Suggested Features and Enhancements:

#### 1. **Licensing and Key Registration**:
   - **Add a Section for License Key**: We'll add a field where users can input their license key and save it in the options table.
   - **Validate License**: You can create a function that pings an external API to validate the license key and store the status.

   Here's how you could add that:

   ```php
   public function page_init()
   {        
       register_setting(
           'my_option_group', // Option group
           'my_option_name', // Option name
           array( $this, 'sanitize' ) // Sanitize
       );

       add_settings_section(
           'license_section_id', // ID
           'License Key Settings', // Title
           array( $this, 'print_license_section_info' ), // Callback
           'my-setting-admin' // Page
       );

       add_settings_field(
           'license_key', 
           'License Key', 
           array( $this, 'license_key_callback' ), 
           'my-setting-admin', 
           'license_section_id'
       );
   }

   public function print_license_section_info() {
       print 'Enter your license key below:';
   }

   public function license_key_callback() {
       printf(
           '<input type="text" id="license_key" name="my_option_name[license_key]" value="%s" />',
           isset( $this->options['license_key'] ) ? esc_attr( $this->options['license_key']) : ''
       );
   }
   ```

   You can then add validation logic by pinging a licensing server or API whenever the key is saved.

---

#### 2. **Custom Post Types Section**:
   - **Dynamic Post Types**: Allow the admin to define new custom post types dynamically on the settings page.
   - You can add a text field or dropdown to let users create custom post types without coding.

   Example:

   ```php
   add_settings_section(
       'custom_post_types_section', 
       'Custom Post Types', 
       array( $this, 'custom_post_types_info' ), 
       'my-setting-admin'
   );

   add_settings_field(
       'post_type_name', 
       'Custom Post Type Name', 
       array( $this, 'post_type_name_callback' ), 
       'my-setting-admin', 
       'custom_post_types_section'
   );
   ```

   In the callback function, you can offer an input field where users enter the name of the post type and validate it using custom logic. When a new post type is created, you can dynamically register it using `register_post_type`.

---

#### 3. **General Settings with Toggle Switches**:
   - **Switch for Gutenberg/Other Features**: This section allows admins to enable/disable certain features like Gutenberg blocks.
   - Use modern UI elements like **toggle switches** instead of checkboxes for the settings. You can achieve this with CSS or by using an existing library.

   Add a field like this:

   ```php
   add_settings_field(
       'enable_gutenberg', 
       'Enable Gutenberg', 
       array( $this, 'gutenberg_toggle_callback' ), 
       'my-setting-admin', 
       'general_settings_section'
   );

   public function gutenberg_toggle_callback() {
       $checked = isset( $this->options['enable_gutenberg'] ) ? 'checked' : '';
       echo '<label class="switch">
               <input type="checkbox" name="my_option_name[enable_gutenberg]" ' . $checked . '>
               <span class="slider round"></span>
             </label>';
   }
   ```

   You can style the checkbox as a toggle switch using CSS:

   ```css
   .switch {
       position: relative;
       display: inline-block;
       width: 60px;
       height: 34px;
   }

   .switch input { 
       opacity: 0;
       width: 0;
       height: 0;
   }

   .slider {
       position: absolute;
       cursor: pointer;
       top: 0;
       left: 0;
       right: 0;
       bottom: 0;
       background-color: #ccc;
       transition: .4s;
   }

   .slider.round {
       border-radius: 34px;
   }

   .slider.round:before {
       border-radius: 50%;
   }

   input:checked + .slider {
       background-color: #2196F3;
   }

   input:checked + .slider:before {
       transform: translateX(26px);
   }
   ```

---

### 4. **Tabular Layout for Settings**:
   - Divide the settings page into **tabs** for each section: General, Custom Post Types, and Licensing.
   - You can implement tabs using jQuery UI or by creating simple CSS tabs to separate the settings neatly.

---

### Summary of Enhancements:
1. **License Key Management**: Add a section to register and validate license keys.
2. **Dynamic Custom Post Types**: Allow users to define custom post types from the settings.
3. **General Settings with Toggle Switches**: Add toggle switches for enabling/disabling features (e.g., Gutenberg blocks).
4. **Tabs for Settings**: Organize settings into tabs for better UX.