Updated Class

[admin/class-admin-init.php]
* Added woocommerce_screen_ids
* Removed Admin Notice Handler Class Init
* Added Plugins Settings Page ID To WC Screen ID

[admin/class-admin-settings.php & admin/class-donation-settings.php]
* Working To Get A Prefect Settings Page

[admin/includes/class-admin-functions.php]
* Changed WC_QD()->donation_id to WC_QD_ID

[includes/class-quick-donation-process.php]
* Created Class To Process Front End Donation Form

[includes/class-shortcode-handler.php]
* Created 2 Actions
1. wc_quick_donation_before_donation_form
2. wc_quick_donation_after_donation_form

[woocommerce-quick-donation.php]
* Changed $donation_id from dynimic to static
* Added WC_QD_ID defined variable
* Rearranged Few Loading Files

admin/class-admin-init.php

@@ -28,17 +28,19 @@ class WooCommerce_Quick_Donation_Admin  {
         add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_scripts' ) );
         add_action( 'admin_init', array( $this, 'init_admin_class' ));
         add_action( 'plugins_loaded', array( $this, 'init' ) );
-
         add_filter( 'plugin_row_meta', array($this, 'plugin_row_links' ), 10, 2 );
-        add_filter( 'woocommerce_get_settings_pages',  array($this,'settings_page') ); 
+        
+        add_filter('woocommerce_screen_ids',array($this,'set_wc_screen_ids'));
+        
+        
 	}
 
+    
     /**
      * Inits Admin Sttings
      */
     public function init_admin_class(){
         $this->functions =  new WooCommerce_Quick_Donation_Admin_Function;
-        //$this->notice = new WordPress_Admin_Notice_Handler;
        # new WooCommerce_Plugin_Boiler_Plate_Admin_Settings;
     }
  
@@ -73,6 +75,13 @@ class WooCommerce_Quick_Donation_Admin  {
  
 	}
     
+    public function set_wc_screen_ids($screen){
+       
+        $screen[] = 'wcqd_project_page_wc_qd_settings';
+        
+        return $screen;
+    }    
+    
     /**
      * Gets Current Screen ID from wordpress
      * @return string [Current Screen ID]
@@ -90,6 +99,7 @@ class WooCommerce_Quick_Donation_Admin  {
         $screen_ids = array();
         $screen_ids[] = 'edit-product';
         $screen_ids[] = 'product';
+        $screen_ids[] = 'wcqd_project_page_wc_qd_settings';
         return $screen_ids;
     }
     

admin/class-admin-settings.php

 <?php
+
 /**
- * The admin-specific functionality of the plugin.
- *
- * @link       https://wordpress.org/plugins/woocommerce-role-based-price/
+ * Settings API CLass For WC Quick Donation
  *
- * The admin-specific functionality of the plugin.
+ * @version 1.1
  *
- * Defines the plugin name, version, and two examples hooks for how to
- * enqueue the admin-specific stylesheet and JavaScript.
+ * @author Tareq Hasan <tareq@weDevs.com>
+ * @link http://tareq.weDevs.com Tareq's Planet
  *
- * @package    @TODO
- * @subpackage @TODO
+ * @package    WooCommerce_Quick_Donation
+ * @subpackage WooCommerce_Quick_Donation/Admin/Settings_API
  * @author     Varun Sridharan <varunsridharan23@gmail.com>
  */
 if ( ! defined( 'WPINC' ) ) { die; }
 
-#class WooCommerce_Plugin_Boiler_Plate_Admin_Settings extends WooCommerce_Plugin_Boiler_Plate_Admin {
 
-    #public function __construct() {
+if ( !class_exists( 'WooCommerce_Quick_Donation_Settings_Api' ) ):
+class WooCommerce_Quick_Donation_Settings_Api {
+
+    /**
+     * settings sections array
+     *
+     * @var array
+     */
+    private $settings_sections = array();
+
+    /**
+     * Settings fields array
+     *
+     * @var array
+     */
+    private $settings_fields = array();
+
+    /**
+     * Singleton instance
+     *
+     * @var object
+     */
+    private static $_instance;
+
+    public function __construct() {
+        add_action( 'admin_enqueue_scripts', array( $this, 'admin_enqueue_scripts' ) );
+    }
+
+    /**
+     * Enqueue scripts and styles
+     */
+    function admin_enqueue_scripts() {
+        wp_enqueue_style( 'wp-color-picker' );
+
+        wp_enqueue_media();
+        wp_enqueue_script( 'wp-color-picker' );
+        wp_enqueue_script( 'jquery' );
+    }
+
+    /**
+     * Set settings sections
+     *
+     * @param array   $sections setting sections array
+     */
+    function set_sections( $sections ) {
+        $this->settings_sections = $sections;
+
+        return $this;
+    }
+
+    /**
+     * Add a single section
+     *
+     * @param array   $section
+     */
+    function add_section( $section ) {
+        $this->settings_sections[] = $section;
+
+        return $this;
+    }
+
+    /**
+     * Set settings fields
+     *
+     * @param array   $fields settings fields array
+     */
+    function set_fields( $fields ) {
+        $this->settings_fields = $fields;
+
+        return $this;
+    }
+
+    function add_field( $section, $field ) {
+        $defaults = array(
+            'name' => '',
+            'label' => '',
+            'desc' => '',
+            'type' => 'text'
+        );
+
+        $arg = wp_parse_args( $field, $defaults );
+        $this->settings_fields[$section][] = $arg;
+
+        return $this;
+    }
+
+    /**
+     * Initialize and registers the settings sections and fileds to WordPress
+     *
+     * Usually this should be called at `admin_init` hook.
+     *
+     * This function gets the initiated settings sections and fields. Then
+     * registers them to WordPress and ready for use.
+     */
+    function admin_init() {
+        //register settings sections
+        foreach ( $this->settings_sections as $section ) {
+            if ( false == get_option( $section['id'] ) ) {
+                add_option( $section['id'] );
+            }
+
+            if ( isset($section['desc']) && !empty($section['desc']) ) {
+                $section['desc'] = '<div class="inside">'.$section['desc'].'</div>';
+                $callback = create_function('', 'echo "'.str_replace('"', '\"', $section['desc']).'";');
+            } else if ( isset( $section['callback'] ) ) {
+                $callback = $section['callback'];
+            } else {
+                $callback = null;
+            }
+
+            add_settings_section( $section['id'], $section['title'], $callback, $section['id'] );
+        }
+
+        //register settings fields
+        foreach ( $this->settings_fields as $section => $field ) {
+            foreach ( $field as $option ) {
+
+                $type = isset( $option['type'] ) ? $option['type'] : 'text';
+
+                $args = array(
+                    'id' => $option['name'],
+                    'label_for' => $args['label_for'] = "{$section}[{$option['name']}]",
+                    'desc' => isset( $option['desc'] ) ? $option['desc'] : '',
+                    'name' => $option['label'],
+                    'section' => $section,
+                    'size' => isset( $option['size'] ) ? $option['size'] : null,
+                    'options' => isset( $option['options'] ) ? $option['options'] : '',
+                    'std' => isset( $option['default'] ) ? $option['default'] : '',
+                    'sanitize_callback' => isset( $option['sanitize_callback'] ) ? $option['sanitize_callback'] : '',
+                    'type' => $type,
+                );
+
+                add_settings_field( $section . '[' . $option['name'] . ']', $option['label'], array( $this, 'callback_' . $type ), $section, $section, $args );
+            }
+        }
+
+        // creates our settings in the options table
+        foreach ( $this->settings_sections as $section ) {
+            register_setting( $section['id'], $section['id'], array( $this, 'sanitize_options' ) );
+        }
+    }
+
+    /**
+     * Get field description for display
+     *
+     * @param array   $args settings field args
+     */
+    public function get_field_description( $args ) {
+        if ( ! empty( $args['desc'] ) ) {
+            $desc = sprintf( '<p class="description">%s</p>', $args['desc'] );
+        } else {
+            $desc = '';
+        }
+
+        return $desc;
+    }
+
+    /**
+     * Displays a text field for a settings field
+     *
+     * @param array   $args settings field args
+     */
+    function callback_text( $args ) {
+
+        $value = esc_attr( $this->get_option( $args['id'], $args['section'], $args['std'] ) );
+        $size = isset( $args['size'] ) && !is_null( $args['size'] ) ? $args['size'] : 'regular';
+        $type = isset( $args['type'] ) ? $args['type'] : 'text';
+
+        $html = sprintf( '<input type="%1$s" class="%2$s-text" id="%3$s[%4$s]" name="%3$s[%4$s]" value="%5$s"/>', $type, $size, $args['section'], $args['id'], $value );
+        $html .= $this->get_field_description( $args );
+
+        echo $html;
+    }
+
+    /**
+     * Displays a url field for a settings field
+     *
+     * @param array   $args settings field args
+     */
+    function callback_url( $args ) {
+        $this->callback_text( $args );
+    }
+
+    /**
+     * Displays a number field for a settings field
+     *
+     * @param array   $args settings field args
+     */
+    function callback_number( $args ) {
+        $this->callback_text( $args );
+    }
+
+    /**
+     * Displays a checkbox for a settings field
+     *
+     * @param array   $args settings field args
+     */
+    function callback_checkbox( $args ) {
+
+        $value = esc_attr( $this->get_option( $args['id'], $args['section'], $args['std'] ) );
+
+        $html = '<fieldset>';
+        $html .= sprintf( '<label for="wpuf-%1$s[%2$s]">', $args['section'], $args['id'] );
+        $html .= sprintf( '<input type="hidden" name="%1$s[%2$s]" value="off" />', $args['section'], $args['id'] );
+        $html .= sprintf( '<input type="checkbox" class="checkbox" id="wpuf-%1$s[%2$s]" name="%1$s[%2$s]" value="on" %3$s />', $args['section'], $args['id'], checked( $value, 'on', false ) );
+        $html .= sprintf( '%1$s</label>', $args['desc'] );
+        $html .= '</fieldset>';
+
+        echo $html;
+    }
+
+    /**
+     * Displays a multicheckbox a settings field
+     *
+     * @param array   $args settings field args
+     */
+    function callback_multicheck( $args ) {
+
+        $value = $this->get_option( $args['id'], $args['section'], $args['std'] );
+
+        $html = '<fieldset>';
+        foreach ( $args['options'] as $key => $label ) {
+            $checked = isset( $value[$key] ) ? $value[$key] : '0';
+            $html .= sprintf( '<label for="wpuf-%1$s[%2$s][%3$s]">', $args['section'], $args['id'], $key );
+            $html .= sprintf( '<input type="checkbox" class="checkbox" id="wpuf-%1$s[%2$s][%3$s]" name="%1$s[%2$s][%3$s]" value="%3$s" %4$s />', $args['section'], $args['id'], $key, checked( $checked, $key, false ) );
+            $html .= sprintf( '%1$s</label><br>',  $label );
+        }
+        $html .= $this->get_field_description( $args );
+        $html .= '</fieldset>';
+
+        echo $html;
+    }
+
+    /**
+     * Displays a multicheckbox a settings field
+     *
+     * @param array   $args settings field args
+     */
+    function callback_radio( $args ) {
+
+        $value = $this->get_option( $args['id'], $args['section'], $args['std'] );
+
+        $html = '<fieldset>';
+        foreach ( $args['options'] as $key => $label ) {
+            $html .= sprintf( '<label for="wpuf-%1$s[%2$s][%3$s]">',  $args['section'], $args['id'], $key );
+            $html .= sprintf( '<input type="radio" class="radio" id="wpuf-%1$s[%2$s][%3$s]" name="%1$s[%2$s]" value="%3$s" %4$s />', $args['section'], $args['id'], $key, checked( $value, $key, false ) );
+            $html .= sprintf( '%1$s</label><br>', $label );
+        }
+        $html .= $this->get_field_description( $args );
+        $html .= '</fieldset>';
+
+        echo $html;
+    }
+
+    /**
+     * Displays a selectbox for a settings field
+     *
+     * @param array   $args settings field args
+     */
+    function callback_select( $args ) {
+
+        $value = esc_attr( $this->get_option( $args['id'], $args['section'], $args['std'] ) );
+        $size = isset( $args['size'] ) && !is_null( $args['size'] ) ? $args['size'] : 'regular';
+
+        $html = sprintf( '<select class="%1$s" name="%2$s[%3$s]" id="%2$s[%3$s]">', $size, $args['section'], $args['id'] );
+        foreach ( $args['options'] as $key => $label ) {
+            $html .= sprintf( '<option value="%s"%s>%s</option>', $key, selected( $value, $key, false ), $label );
+        }
+        $html .= sprintf( '</select>' );
+        $html .= $this->get_field_description( $args );
+
+        echo $html;
+    }
+
+    /**
+     * Displays a textarea for a settings field
+     *
+     * @param array   $args settings field args
+     */
+    function callback_textarea( $args ) {
+
+        $value = esc_textarea( $this->get_option( $args['id'], $args['section'], $args['std'] ) );
+        $size = isset( $args['size'] ) && !is_null( $args['size'] ) ? $args['size'] : 'regular';
+
+        $html = sprintf( '<textarea rows="5" cols="55" class="%1$s-text" id="%2$s[%3$s]" name="%2$s[%3$s]">%4$s</textarea>', $size, $args['section'], $args['id'], $value );
+        $html .= $this->get_field_description( $args );
+
+        echo $html;
+    }
+
+    /**
+     * Displays a textarea for a settings field
+     *
+     * @param array   $args settings field args
+     * @return string
+     */
+    function callback_html( $args ) {
+        echo $this->get_field_description( $args );
+    }
+
+    /**
+     * Displays a rich text textarea for a settings field
+     *
+     * @param array   $args settings field args
+     */
+    function callback_wysiwyg( $args ) {
+
+        $value = $this->get_option( $args['id'], $args['section'], $args['std'] );
+        $size = isset( $args['size'] ) && !is_null( $args['size'] ) ? $args['size'] : '500px';
+
+        echo '<div style="max-width: ' . $size . ';">';
+
+        $editor_settings = array(
+            'teeny' => true,
+            'textarea_name' => $args['section'] . '[' . $args['id'] . ']',
+            'textarea_rows' => 10
+        );
+        if ( isset( $args['options'] ) && is_array( $args['options'] ) ) {
+            $editor_settings = array_merge( $editor_settings, $args['options'] );
+        }
+
+        wp_editor( $value, $args['section'] . '-' . $args['id'], $editor_settings );
+
+        echo '</div>';
+
+        echo $this->get_field_description( $args );
+    }
+
+    /**
+     * Displays a file upload field for a settings field
+     *
+     * @param array   $args settings field args
+     */
+    function callback_file( $args ) {
+
+        $value = esc_attr( $this->get_option( $args['id'], $args['section'], $args['std'] ) );
+        $size = isset( $args['size'] ) && !is_null( $args['size'] ) ? $args['size'] : 'regular';
+        $id = $args['section']  . '[' . $args['id'] . ']';
+        $label = isset( $args['options']['button_label'] ) ?
+                        $args['options']['button_label'] :
+                        __( 'Choose File' );
+
+        $html  = sprintf( '<input type="text" class="%1$s-text wpsa-url" id="%2$s[%3$s]" name="%2$s[%3$s]" value="%4$s"/>', $size, $args['section'], $args['id'], $value );
+        $html .= '<input type="button" class="button wpsa-browse" value="' . $label . '" />';
+        $html .= $this->get_field_description( $args );
+
+        echo $html;
+    }
+
+    /**
+     * Displays a password field for a settings field
+     *
+     * @param array   $args settings field args
+     */
+    function callback_password( $args ) {
+
+        $value = esc_attr( $this->get_option( $args['id'], $args['section'], $args['std'] ) );
+        $size = isset( $args['size'] ) && !is_null( $args['size'] ) ? $args['size'] : 'regular';
+
+        $html = sprintf( '<input type="password" class="%1$s-text" id="%2$s[%3$s]" name="%2$s[%3$s]" value="%4$s"/>', $size, $args['section'], $args['id'], $value );
+        $html .= $this->get_field_description( $args );
+
+        echo $html;
+    }
+
+    /**
+     * Displays a color picker field for a settings field
+     *
+     * @param array   $args settings field args
+     */
+    function callback_color( $args ) {
+
+        $value = esc_attr( $this->get_option( $args['id'], $args['section'], $args['std'] ) );
+        $size = isset( $args['size'] ) && !is_null( $args['size'] ) ? $args['size'] : 'regular';
+
+        $html = sprintf( '<input type="text" class="%1$s-text wp-color-picker-field" id="%2$s[%3$s]" name="%2$s[%3$s]" value="%4$s" data-default-color="%5$s" />', $size, $args['section'], $args['id'], $value, $args['std'] );
+        $html .= $this->get_field_description( $args );
+
+        echo $html;
+    }
+
+    /**
+     * Sanitize callback for Settings API
+     */
+    function sanitize_options( $options ) {
+        foreach( $options as $option_slug => $option_value ) {
+            $sanitize_callback = $this->get_sanitize_callback( $option_slug );
+
+            // If callback is set, call it
+            if ( $sanitize_callback ) {
+                $options[ $option_slug ] = call_user_func( $sanitize_callback, $option_value );
+                continue;
+            }
+        }
+
+        return $options;
+    }
+
+    /**
+     * Get sanitization callback for given option slug
+     *
+     * @param string $slug option slug
+     *
+     * @return mixed string or bool false
+     */
+    function get_sanitize_callback( $slug = '' ) {
+        if ( empty( $slug ) ) {
+            return false;
+        }
+
+        // Iterate over registered fields and see if we can find proper callback
+        foreach( $this->settings_fields as $section => $options ) {
+            foreach ( $options as $option ) {
+                if ( $option['name'] != $slug ) {
+                    continue;
+                }
+
+                // Return the callback name
+                return isset( $option['sanitize_callback'] ) && is_callable( $option['sanitize_callback'] ) ? $option['sanitize_callback'] : false;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Get the value of a settings field
+     *
+     * @param string  $option  settings field name
+     * @param string  $section the section name this field belongs to
+     * @param string  $default default text if it's not found
+     * @return string
+     */
+    function get_option( $option, $section, $default = '' ) {
+
+        $options = get_option( $section );
+
+        if ( isset( $options[$option] ) ) {
+            return $options[$option];
+        }
+
+        return $default;
+    }
+
+    /**
+     * Show navigations as tab
+     *
+     * Shows all the settings section labels as tab
+     */
+    function show_navigation() {
+        $html = '<h2 class="nav-tab-wrapper">';
+
+        foreach ( $this->settings_sections as $tab ) {
+            $html .= sprintf( '<a href="#%1$s" class="nav-tab" id="%1$s-tab">%2$s</a>', $tab['id'], $tab['title'] );
+        }
+
+        $html .= '</h2>';
+
+        echo $html;
+    }
+
+    /**
+     * Show the section settings forms
+     *
+     * This function displays every sections in a different form
+     */
+    function show_forms() {
+        ?>
+        <div class="metabox-holder">
+			<?php foreach ( $this->settings_sections as $form ) { ?>
+				<div id="<?php echo $form['id']; ?>" class="group" style="display: none;">
+					<form method="post" action="options.php">
+						<?php
+						do_action( 'wsa_form_top_' . $form['id'], $form );
+						settings_fields( $form['id'] );
+						do_settings_sections( $form['id'] );
+						do_action( 'wsa_form_bottom_' . $form['id'], $form );
+						?>
+						<div style="padding-left: 10px">
+							<?php submit_button(); ?>
+						</div>
+					</form>
+				</div>
+			<?php } ?>
+        </div>
+        <?php
+        $this->script();
+    }
+
+    /**
+     * Tabbable JavaScript codes & Initiate Color Picker
+     *
+     * This code uses localstorage for displaying active tabs
+     */
+    function script() {
+        ?>
+        <script>
+            jQuery(document).ready(function($) {
+                //Initiate Color Picker
+                $('.wp-color-picker-field').wpColorPicker();
+
+                // Switches option sections
+                $('.group').hide();
+                var activetab = '';
+                if (typeof(localStorage) != 'undefined' ) {
+                    activetab = localStorage.getItem("activetab");
+                }
+                if (activetab != '' && $(activetab).length ) {
+                    $(activetab).fadeIn();
+                } else {
+                    $('.group:first').fadeIn();
+                }
+                $('.group .collapsed').each(function(){
+                    $(this).find('input:checked').parent().parent().parent().nextAll().each(
+                    function(){
+                        if ($(this).hasClass('last')) {
+                            $(this).removeClass('hidden');
+                            return false;
+                        }
+                        $(this).filter('.hidden').removeClass('hidden');
+                    });
+                });
+
+                if (activetab != '' && $(activetab + '-tab').length ) {
+                    $(activetab + '-tab').addClass('nav-tab-active');
+                }
+                else {
+                    $('.nav-tab-wrapper a:first').addClass('nav-tab-active');
+                }
+                $('.nav-tab-wrapper a').click(function(evt) {
+                    $('.nav-tab-wrapper a').removeClass('nav-tab-active');
+                    $(this).addClass('nav-tab-active').blur();
+                    var clicked_group = $(this).attr('href');
+                    if (typeof(localStorage) != 'undefined' ) {
+                        localStorage.setItem("activetab", $(this).attr('href'));
+                    }
+                    $('.group').hide();
+                    $(clicked_group).fadeIn();
+                    evt.preventDefault();
+                });
+
+                $('.wpsa-browse').on('click', function (event) {
+                    event.preventDefault();
+
+                    var self = $(this);
+
+                    // Create the media frame.
+                    var file_frame = wp.media.frames.file_frame = wp.media({
+                        title: self.data('uploader_title'),
+                        button: {
+                            text: self.data('uploader_button_text'),
+                        },
+                        multiple: false
+                    });
+
+                    file_frame.on('select', function () {
+                        attachment = file_frame.state().get('selection').first().toJSON();
+
+                        self.prev('.wpsa-url').val(attachment.url);
+                    });
+
+                    // Finally, open the modal
+                    file_frame.open();
+                });
+        });
+        </script>
+
+        <style type="text/css">
+            /** WordPress 3.8 Fix **/
+            .form-table th { padding: 20px 10px; }
+            #wpbody-content .metabox-holder { padding-top: 5px; }
+        </style>
+        <?php
+    }
+
+}
+endif;
 
-    #}
-#}
 
 
 

admin/class-donation-settings.php

+<?php
+
+/**
+ * WordPress settings API demo class
+ *
+ * @author Tareq Hasan
+ */
+if ( !class_exists('WeDevs_Settings_API_Test' ) ):
+class WeDevs_Settings_API_Test {
+
+    private $settings_api;
+
+    function __construct() {
+        $this->settings_api = new WooCommerce_Quick_Donation_Settings_Api;
+
+        add_action( 'admin_init', array($this, 'admin_init') );
+        add_action( 'admin_menu', array($this, 'admin_menu') );
+    }
+
+    function admin_init() {
+
+        //set the settings
+        $this->settings_api->set_sections( $this->get_settings_sections() );
+        $this->settings_api->set_fields( $this->get_settings_fields() );
+
+        //initialize settings
+        $this->settings_api->admin_init();
+    }
+
+    function admin_menu() {
+        add_submenu_page( 'edit.php?post_type='.WC_QD_PT, 'Settings' , 'Settings', 'delete_posts', 'wc_qd_settings',  array($this, 'plugin_page') );
+    }
+
+    function get_settings_sections() {
+        $sections = array(
+            array(
+                'id' => 'wedevs_basics',
+                'title' => __( 'Basic Settings', 'wedevs' ),
+                'desc' => 'TESTff'
+            ),
+            array(
+                'id' => 'wedevs_advanced',
+                'title' => __( 'Advanced Settings', 'wedevs' )
+            ),
+            array(
+                'id' => 'wedevs_others',
+                'title' => __( 'Other Settings', 'wpuf' )
+            )
+        );
+        return $sections;
+    }
+
+    /**
+     * Returns all the settings fields
+     *
+     * @return array settings fields
+     */
+    function get_settings_fields() {
+        $settings_fields = array(
+            'wedevs_basics' => array(
+                array(
+                    'name'              => 'text_val',
+                    'label'             => __( 'Text Input', 'wedevs' ),
+                    'desc'              => __( 'Text input description', 'wedevs' ),
+                    'type'              => 'text',
+                    'default'           => 'Title',
+                    'sanitize_callback' => 'intval'
+                ),
+                array(
+                    'name'              => 'number_input',
+                    'label'             => __( 'Number Input', 'wedevs' ),
+                    'desc'              => __( 'Number field with validation callback `intval`', 'wedevs' ),
+                    'type'              => 'number',
+                    'default'           => 'Title',
+                    'sanitize_callback' => 'intval'
+                ),
+                array(
+                    'name'  => 'textarea',
+                    'label' => __( 'Textarea Input', 'wedevs' ),
+                    'desc'  => __( 'Textarea description', 'wedevs' ),
+                    'type'  => 'textarea'
+                ),
+                array(
+                    'name'  => 'checkbox',
+                    'label' => __( 'Checkbox', 'wedevs' ),
+                    'desc'  => __( 'Checkbox Label', 'wedevs' ),
+                    'type'  => 'checkbox'
+                ),
+                array(
+                    'name'    => 'radio',
+                    'label'   => __( 'Radio Button', 'wedevs' ),
+                    'desc'    => __( 'A radio button', 'wedevs' ),
+                    'type'    => 'radio',
+                    'options' => array(
+                        'yes' => 'Yes',
+                        'no'  => 'No'
+                    )
+                ),
+                array(
+                    'name'    => 'multicheck',
+                    'label'   => __( 'Multile checkbox', 'wedevs' ),
+                    'desc'    => __( 'Multi checkbox description', 'wedevs' ),
+                    'type'    => 'multicheck',
+                    'options' => array(
+                        'one'   => 'One',
+                        'two'   => 'Two',
+                        'three' => 'Three',
+                        'four'  => 'Four'
+                    )
+                ),
+                array(
+                    'name'    => 'selectbox',
+                    'label'   => __( 'A Dropdown', 'wedevs' ),
+                    'desc'    => __( 'Dropdown description', 'wedevs' ),
+                    'type'    => 'select',
+                    'default' => 'no',
+                    'size' => 'wc-enhanced-select small',
+                    'style' => 'width:50%', 
+                    'options' => array(
+                        'yes' => 'Yes',
+                        'no'  => 'No'
+                    )
+                ),
+                array(
+                    'name'    => 'password',
+                    'label'   => __( 'Password', 'wedevs' ),
+                    'desc'    => __( 'Password description', 'wedevs' ),
+                    'type'    => 'password',
+                    'default' => ''
+                ),
+                array(
+                    'name'    => 'file',
+                    'label'   => __( 'File', 'wedevs' ),
+                    'desc'    => __( 'File description', 'wedevs' ),
+                    'type'    => 'file',
+                    'default' => '',
+                    'options' => array(
+                        'button_label' => 'Choose Image'
+                    )
+                )
+            ),
+            'wedevs_advanced' => array(
+                array(
+                    'name'    => 'color',
+                    'label'   => __( 'Color', 'wedevs' ),
+                    'desc'    => __( 'Color description', 'wedevs' ),
+                    'type'    => 'color',
+                    'default' => ''
+                ),
+                array(
+                    'name'    => 'password',
+                    'label'   => __( 'Password', 'wedevs' ),
+                    'desc'    => __( 'Password description', 'wedevs' ),
+                    'type'    => 'password',
+                    'default' => ''
+                ),
+                array(
+                    'name'    => 'wysiwyg',
+                    'label'   => __( 'Advanced Editor', 'wedevs' ),
+                    'desc'    => __( 'WP_Editor description', 'wedevs' ),
+                    'type'    => 'wysiwyg',
+                    'default' => ''
+                ),
+                array(
+                    'name'    => 'multicheck',
+                    'label'   => __( 'Multile checkbox', 'wedevs' ),
+                    'desc'    => __( 'Multi checkbox description', 'wedevs' ),
+                    'type'    => 'multicheck',
+                    'default' => array('one' => 'one', 'four' => 'four'),
+                    'options' => array(
+                        'one'   => 'One',
+                        'two'   => 'Two',
+                        'three' => 'Three',
+                        'four'  => 'Four'
+                    )
+                ),
+                array(
+                    'name'    => 'selectbox',
+                    'label'   => __( 'A Dropdown', 'wedevs' ),
+                    'desc'    => __( 'Dropdown description', 'wedevs' ),
+                    'type'    => 'select',
+                    'options' => array(
+                        'yes' => 'Yes',
+                        'no'  => 'No'
+                    )
+                ),
+                array(
+                    'name'    => 'password',
+                    'label'   => __( 'Password', 'wedevs' ),
+                    'desc'    => __( 'Password description', 'wedevs' ),
+                    'type'    => 'password',
+                    'default' => ''
+                ),
+                array(
+                    'name'    => 'file',
+                    'label'   => __( 'File', 'wedevs' ),
+                    'desc'    => __( 'File description', 'wedevs' ),
+                    'type'    => 'file',
+                    'default' => ''
+                )
+            ),
+            'wedevs_others' => array(
+                array(
+                    'name'    => 'text',
+                    'label'   => __( 'Text Input', 'wedevs' ),
+                    'desc'    => __( 'Text input description', 'wedevs' ),
+                    'type'    => 'text',
+                    'default' => 'Title'
+                ),
+                array(
+                    'name'  => 'textarea',
+                    'label' => __( 'Textarea Input', 'wedevs' ),
+                    'desc'  => __( 'Textarea description', 'wedevs' ),
+                    'type'  => 'textarea'
+                ),
+                array(
+                    'name'  => 'checkbox',
+                    'label' => __( 'Checkbox', 'wedevs' ),
+                    'desc'  => __( 'Checkbox Label', 'wedevs' ),
+                    'type'  => 'checkbox'
+                ),
+                array(
+                    'name'    => 'radio',
+                    'label'   => __( 'Radio Button', 'wedevs' ),
+                    'desc'    => __( 'A radio button', 'wedevs' ),
+                    'type'    => 'radio',
+                    'options' => array(
+                        'yes' => 'Yes',
+                        'no'  => 'No'
+                    )
+                ),
+                array(
+                    'name'    => 'multicheck',
+                    'label'   => __( 'Multile checkbox', 'wedevs' ),
+                    'desc'    => __( 'Multi checkbox description', 'wedevs' ),
+                    'type'    => 'multicheck',
+                    'options' => array(
+                        'one'   => 'One',
+                        'two'   => 'Two',
+                        'three' => 'Three',
+                        'four'  => 'Four'
+                    )
+                ),
+                array(
+                    'name'    => 'selectbox',
+                    'label'   => __( 'A Dropdown', 'wedevs' ),
+                    'desc'    => __( 'Dropdown description', 'wedevs' ),
+                    'type'    => 'select',
+                    'options' => array(
+                        'yes' => 'Yes',
+                        'no'  => 'No'
+                    )
+                ),
+                array(
+                    'name'    => 'password',
+                    'label'   => __( 'Password', 'wedevs' ),
+                    'desc'    => __( 'Password description', 'wedevs' ),
+                    'type'    => 'password',
+                    'default' => ''
+                ),
+                array(
+                    'name'    => 'file',
+                    'label'   => __( 'File', 'wedevs' ),
+                    'desc'    => __( 'File description', 'wedevs' ),
+                    'type'    => 'file',
+                    'default' => ''
+                )
+            )
+        );
+
+        return $settings_fields;
+    }
+
+    function plugin_page() {
+        echo '<div class="wrap">';
+
+        $this->settings_api->show_navigation();
+        $this->settings_api->show_forms();
+
+        echo '</div>';
+    }
+
+    /**
+     * Get all the pages
+     *
+     * @return array page names with key value pairs
+     */
+    function get_pages() {
+        $pages = get_pages();
+        $pages_options = array();
+        if ( $pages ) {
+            foreach ($pages as $page) {
+                $pages_options[$page->ID] = $page->post_title;
+            }
+        }
+
+        return $pages_options;
+    }
+
+}
+endif;
+
+new WeDevs_Settings_API_Test();

admin/includes/class-admin-functions.php

@@ -33,10 +33,7 @@ class WooCommerce_Quick_Donation_Admin_Function {
 	public function protect_donation_product($actions,$post) {
         
 		if('product' == $post->post_type) {  
-            
-            
-            
-			if($post->ID == WC_QD()->donation_id){
+			if($post->ID == WC_QD_ID){
 				unset($actions['inline hide-if-no-js']);
 				unset($actions['trash']);
 				unset($actions['duplicate']);

includes/class-quick-donation-process.php

+<?php
+/**
+ * functionality of the plugin.
+ * @author  Varun Sridharan <varunsridharan23@gmail.com>
+ */
+if ( ! defined( 'WPINC' ) ) { die; }
+
+class WooCommerce_Quick_Donation_Process extends WooCommerce_Quick_Donation  {
+
+    public $is_donation_exists = false;
+        
+    function __construct(){
+        parent::__construct();
+       // add_action( 'wp_loaded',array($this,'on_wp_loaded'),20); 
+        add_filter( 'woocommerce_get_price', array($this,'get_price'),10,2);
+    }
+    
+    public function on_wp_loaded(){
+        if($this->check_donation_exists_cart()){ $this->is_donation_exists = true; } 
+        
+        $this->process_donation(); 
+    }
+    
+     
+    public function process_donation(){
+        if(isset($_POST['donation_add'])){
+            global $woocommerce;
+            $donation = isset($_POST['wc_qd_donate_project_price']) ? $_POST['wc_qd_donate_project_price'] : false;
+			$projects = isset($_POST['wc_qd_donate_project_name']) && !empty($_POST['wc_qd_donate_project_name']) ? $_POST['wc_qd_donate_project_name'] : false;
+            $donate_price = floatval($donation);
+            $woocommerce->session->jc_donation = $donate_price;
+            $woocommerce->session->projects = $projects;
+            $woocommerce->cart->add_to_cart(self::$donation_id);
+            
+        }
+    }
+    
+    /**
+     * Checks If Donation Product Exists In Cart
+     */
+    public function check_donation_exists_cart(){
+        global $woocommerce;
+        $found = false;
+        if( sizeof($woocommerce->cart->get_cart()) > 0){
+            foreach($woocommerce->cart->get_cart() as $cart_item_key=>$values){
+                $_product = $values['data'];
+                if($_product->id == self::$donation_id)
+                    $found = true;
+            }
+
+        }
+        return $found;
+    }   
+    
+    
+	/**
+	 * Gets Donation Current Price
+	 * @param  $price 
+	 * @param  $product 
+	 * @returns 0 | price
+	 */
+	public function get_price($price, $product){
+		global $woocommerce;
+        
+        if($this->is_donation_exists){
+            if($product->id == self::$donation_id){ 
+                return isset($woocommerce->session->jc_donation) ? floatval($woocommerce->session->jc_donation) : 0; 
+            }
+        }
+		return $price;
+	}	    
+}
+
+
+
+
+    
\ No newline at end of file

includes/class-shortcode-handler.php

@@ -24,14 +24,16 @@ class WooCommerce_Quick_Donation_Shortcode {
     public function shortcode_handler($settings){
         global $donation_box,$donation_price,$currency;
         $settings = shortcode_atts( array(
-        'type' => 'radio',
-        'grouped' => true,
+        'type' => 'select',
+        'grouped' => false,
         ), $settings );
         
         $donation_box = WC_QD()->f()->generate_donation_selbox($settings['grouped'],$settings['type']);
         $donation_price =  WC_QD()->f()->generate_price_box();
         $currency = get_woocommerce_currency_symbol();
+        do_action('wc_quick_donation_before_doantion_form',$settings['type'],$settings['grouped']);
         WC_QD()->f()->load_template('donation_form.php',WC_QD_TEMPLATE);
+        do_action('wc_quick_donation_after_doantion_form',$settings['type'],$settings['grouped']);
     }
 
 }
\ No newline at end of file

woocommerce-quick-donation.php

@@ -28,7 +28,7 @@ class WooCommerce_Quick_Donation {
     public static $is_donation_product_exist = true;
     protected static $f = null;
     public static $shortcode = null;
-    public $donation_id = null;
+    public static $donation_id = null;
 
     /**
      * Creates or returns an instance of this class.
@@ -45,7 +45,10 @@ class WooCommerce_Quick_Donation {
      */
     public function __construct() {
         $this->define_constant();
-        $this->donation_id = get_option(WC_QD_DB.'product_id');
+        self::$donation_id = get_option(WC_QD_DB.'product_id');
+        
+        $this->define('WC_QD_ID',intval(get_option(WC_QD_DB.'product_id')));
+        
         $this->load_required_files();
         
         register_activation_hook( __FILE__,array('WC_QD_INSTALL','INIT') );
@@ -79,7 +82,9 @@ class WooCommerce_Quick_Donation {
 
         $this->load_files(WC_QD_PATH.'includes/class-install.php');
         $this->load_files(WC_QD_PATH.'includes/class-quick-donation-functions.php');
+        $this->load_files(WC_QD_PATH.'includes/class-quick-donation-process.php');
         $this->load_files(WC_QD_PATH.'includes/class-shortcode-handler.php');
+        
         if($this->is_request('admin')){
            $this->load_files(WC_QD_PATH.'admin/class-*.php');
         } 
@@ -92,6 +97,7 @@ class WooCommerce_Quick_Donation {
     private function init_class(){
         self::$f = new WooCommerce_Quick_Donation_Functions;
         self::$shortcode = new WooCommerce_Quick_Donation_Shortcode;
+        $this->donation = new WooCommerce_Quick_Donation_Process;
         
         if($this->is_request('admin')){
             $this->admin = new WooCommerce_Quick_Donation_Admin;