added support for email notice

/**
* Plugin Name: mac-custom-mycred-coupon
* Description: This plugin contains custom functions from mycred.
* Version: 0.2
*/

/* Your code goes below here. */

/* allows for accrual of points when when paying with points */
add_filter( 'mycred_woo_reward_mycred_payment', '__return_true' );

/**
 * Convert myCRED Points into WooCommerce Coupon
 * @version 1.4
 */
add_shortcode( 'mycred_to_woo_coupon', 'mycred_pro_render_points_to_coupon' );
function mycred_pro_render_points_to_coupon( $atts, $content = NULL ) {
        // Users must be logged in
        if ( ! is_user_logged_in() )
                return 'You must be logged in to generate store coupons.';

        // myCRED must be enabled
        if ( ! function_exists( 'mycred' ) )
                return 'myCRED must be enabled to use this shortcode';

        extract( shortcode_atts( array(
                'exchange'           => 1,
                'amount'             => NULL,
                'type'               => 'mycred_default',
                'button_label'       => 'Create Coupon',
                'reference'          => 'points_to_coupon',
                'log'                => '%plural% conversion into store coupon: %post_title%',
                'product_categories' => ''
        ), $atts ) );

        // Load myCRED
        $mycred = mycred( $type );

        // Prep
        $original = $amount;
        $error = $code = false;
        $output = '';
        $user_id = get_current_user_id();

        // No need to show this for excluded users
        if ( $mycred->exclude_user( $user_id ) ) return;

        $balance = $mycred->get_users_balance( $user_id );

        // Form submission
        if ( isset( $_POST['mycred_to_woo'] ) && wp_verify_nonce( $_POST['mycred_to_woo']['token'], 'points-to-woo-coupon' ) ) {

                // Make sure amounts are always positive
                if ( $amount === NULL ) {
                        $original = NULL;
                        $amount = abs( $_POST['mycred_to_woo']['amount'] );
                }

                // Exchange rate
                $value = $mycred->number( $amount*$exchange );

                // Make sure amount is not zero
                if ( $amount == $mycred->zero() )
                        $error = 'Amount can not be zero';

                // Make sure user has enough points
                if ( $amount > $balance )
                        $error = 'Insufficient Funds. Please try a lower amount';

                // If no errors
                if ( $error === false ) {

                        $code = wp_generate_password( 12, false, false );

                        // Deduct points from user
            add_filter( 'mycred_parse_log_entry', 'mycred_pro_temp_post_title_value', 10, 2 );
                        $charge = $mycred->add_creds(
                                $reference,
                                $user_id,
                                0-$amount,
                                $log,
                                0,
                                $code,
                                $type
                        );
            remove_filter( 'mycred_parse_log_entry', 'mycred_pro_temp_post_title_value', 10, 2 );

                        // If points were deducted create coupon
                        if ( $charge !== false ) {

                                // Create Woo Coupon
                                $new_coupon_id = wp_insert_post( array(
                                        'post_title'   => $code,
                                        'post_content' => '',
                                        'post_status'  => 'publish',
                                        'post_author'  => 1,
                                        'post_type'    => 'shop_coupon'
                                ) );

                                $balance = $balance-$amount;
                                $balance = $mycred->number( $balance );

                                // Update Coupon details
                                update_post_meta( $new_coupon_id, 'discount_type', 'fixed_cart' );
                                update_post_meta( $new_coupon_id, 'coupon_amount', $value );
                                update_post_meta( $new_coupon_id, 'individual_use', 'no' );
                                update_post_meta( $new_coupon_id, 'product_ids', '' );
                                update_post_meta( $new_coupon_id, 'exclude_product_ids', '' );

                                // Make sure you set usage_limit to 1 to prevent duplicate usage!!!
                                update_post_meta( $new_coupon_id, 'usage_limit', 1 );
                                update_post_meta( $new_coupon_id, 'usage_limit_per_user', 1 );
                                update_post_meta( $new_coupon_id, 'limit_usage_to_x_items', '' );
                                update_post_meta( $new_coupon_id, 'usage_count', '' );
                                update_post_meta( $new_coupon_id, 'expiry_date', '' );
                                update_post_meta( $new_coupon_id, 'apply_before_tax', 'yes' );
                                update_post_meta( $new_coupon_id, 'free_shipping', 'no' );

                                // If $product_categories is not an empty string then add the product categories limit
                                // to the coupon. Otherwise this is ignored.
                                if ( $product_categories != '' )
                                        update_post_meta( $new_coupon_id, 'product_categories', array( $product_categories ) );

                                update_post_meta( $new_coupon_id, 'exclude_product_categories', array() );
                                update_post_meta( $new_coupon_id, 'exclude_sale_items', 'no' );
                                update_post_meta( $new_coupon_id, 'minimum_amount', '' );
                                update_post_meta( $new_coupon_id, 'customer_email', array() );

                                // Update log entry to include code and value
                                global $wpdb;

                                $new_data = array( 'code' => $code, 'value' => $value, 'ref_type' => 'post', 'product_categories' => $product_categories, 'ex' => $exchange );
                                $wpdb->update(
                                        $mycred->log_table,
                                        array( 'data' => serialize( $new_data ), 'ref_id' => $new_coupon_id ),
                                        array( 'data' => $code ),
                                        array( '%s', '%d' ),
                                        array( '%s' )
                                );

                                // Reset amount
                                $amount = 0;

                        }

                        // Could not charge
                        else {

                                $error = 'You have reached your daily limit and can not create a coupon.';

                        }

                }

        }

        // Show users current balance
        $output .= '
<p>Your current balance is: ' . $mycred->format_creds( $balance ) . '</p>';

        // Error
        if ( $error !== false )
                $output .= '<p style="color:red;">' . $error . '</p>';

        // Success
        elseif ( $code !== false )
                $output .= '<p>Your coupon code is: <strong>' . $code . '</strong></p>';

        // The form for those who have points
        if ( $balance > $mycred->zero() ) {
                $output .= '
<form action="" method="post">
        <input type="hidden" name="mycred_to_woo[token]" value="' . wp_create_nonce( 'points-to-woo-coupon' ) . '" />';

                // If shortcode is not set to use a specific amount
                // we insert the amount field so one can be nominated
                if ( $original === NULL )
                        $output .= '
        <label>Amount</label>
        <input type="text" size="5" name="mycred_to_woo[amount]" value="" />';

                $output .= '
        <input type="submit" name="submit" value="' . $button_label . '" />
</form>';

        }
        // Not enough points
        else
                $output .= '<p>Not enough points to create coupons.</p>';

        return $output;
}

add_filter( 'mycred_woo_profit_share', 'mycred_pro_adjust_woo_share', 10, 3 );
function mycred_pro_adjust_woo_share( $percentage, $order, $product ) {

    // Get custom field
        $check = get_post_meta( $product->ID, 'MYCRED_PROFIT_SHARE_PERCENT', true );
        if ( $check != '' )
                $percentage = $check;

        return $percentage;
}

/**
 * Adjust myCRED Point Rewards
 * Will move the points payout from when an order is "paid" to when
 * an order is "completed".
 * @version 1.0
 */
add_action( 'after_setup_theme', 'mycred_pro_adjust_woo_rewards', 110 );
function mycred_pro_adjust_woo_rewards() {

        remove_action( 'woocommerce_payment_complete', 'mycred_woo_payout_rewards' );
        add_action( 'woocommerce_order_status_completed', 'mycred_woo_payout_rewards' );

}

/**
 * Add Column Header
 * Add in the custom log column header on the main log page in the
 * admin area.
 * @version 1.0
 */
add_filter( 'mycred_log_column_headers', 'mycred_pro_admin_log_columns', 10, 2 );
function mycred_pro_admin_log_columns( $columns, $module ) {

    // Only appliable for admin area
    if ( ( defined( 'DOING_AJAX' ) && DOING_AJAX ) || ! is_admin() ) return $columns;

    // Only applicable for myCRED Log page and not personal log
    if ( isset( $module->args['ctype'] ) && isset( $_GET['page'] ) && $_GET['page'] != $module->args['ctype'] . '_history' )
        $columns['column-ref'] = 'Reference';

    return $columns;

}

/**
 * Render Ref Column
 * Renders the result of the reference column.
 * @version 1.0
 */
add_filter( 'mycred_log_column-ref', 'mycred_pro_custom_log_column', 10, 2 );
function mycred_pro_custom_log_column( $content, $entry ) {

    $refs = mycred_get_all_references();
    if ( isset( $refs[ $entry->ref ] ) )
        return $refs[ $entry->ref ];

    return $entry->ref;

}

/**
 * View my Coupons
 * @since 1.4
 * @version 1.1
 */
add_shortcode( 'mycred_my_coupons', 'mycred_pro_render_shortcode_my_coupons' );
function mycred_pro_render_shortcode_my_coupons( $attr, $content ) {

        extract( shortcode_atts( array(
                'user_id' => NULL,
                'type'    => '',
                'ref'     => 'points_to_coupon',
                'number'  => 10
        ), $attr ) );

        if ( ! function_exists( 'mycred' ) ) return 'myCRED is not installed';

        if ( $user_id === NULL && ! is_user_logged_in() ) return $content;
        if ( $user_id === NULL )
                $user_id = get_current_user_id();

        $args = array();

        $args['user_id'] = $user_id;
        $args['ref'] = $ref;
        $args['number'] = $number;

        $log = new myCRED_Query_Log( $args );

        $log->headers = array(
                'coupon-code'   => 'Coupon Code',
                'coupon-status' => 'Status',
                'coupon-date'   => 'Date Created',
                'coupon-value'  => 'Value'
        );

        ob_start();

        if ( $log->have_entries() )
                $log->display();

        else
                echo '<p>You do not have any coupons</p>';

        $content = ob_get_contents();
        ob_end_clean();

        return $content;

}

/**
 * View my Coupons Column : Code
 * @version 1.2
 */
add_filter( 'mycred_log_coupon-code', 'mycred_pro_column_coupon_code', 10, 2 );
function mycred_pro_column_coupon_code( $content, $log ) {

    $data = maybe_unserialize( $log->data );
    return $data['code'];

}

/**
 * View my Coupons Column : Status
 * @version 1.0
 */
add_filter( 'mycred_log_coupon-status', 'mycred_pro_column_coupon_status', 10, 2 );
function mycred_pro_column_coupon_status( $content, $log ) {

        if ( get_the_title( $log->ref_id ) == '' )
                return 'Used';
        else
                return 'Unused';

}

/**
 * View my Coupons Column : Date
 * @version 1.0
 */
add_filter( 'mycred_log_coupon-date', 'mycred_pro_column_coupon_date', 10, 2 );
function mycred_pro_column_coupon_date( $content, $log ) {

        return date_i18n( 'Y-m-d', $log->time );

}

/**
 * View my Coupons Column : Value
 * @version 1.1
 */
add_filter( 'mycred_log_coupon-value', 'mycred_pro_column_coupon_value', 10, 2 );
function mycred_pro_column_coupon_value( $content, $log ) {

        $data = maybe_unserialize( $log->data );
        if ( isset( $data['value'] ) )
                return '$' . $data['value'];
        else
                return '-';

}

/**
 * myCRED Profit Share for Woo
 * Replaces the default profit share system in myCRED for WooCommerce
 * orders to payout the "line_subtotal" instead of "line_total".
 * @version 1.0
 */
add_action( 'mycred_paid_for_woo', 'mycred_pro_woo_profit_payouts', 10, 3 );
function mycred_pro_woo_profit_payouts( $order, $user, $gateway ) {

        // Default Profit Share ( in percentage )
        $profit_share = 10;

        // Get Items
        $items = $order->get_items();

        // Loop though items
        foreach ( $items as $item ) {

                // Get Product
                $product = get_post( (int) $item['product_id'] );

                // Continue if product has just been deleted or owner is buyer
                if ( $product === NULL || $product->post_author == $user ) continue;

                // Calculate Share and let others play
                $percentage = apply_filters( 'mycred_woo_profit_share', $profit_share, $order, $product, $gateway );
                if ( $percentage == 0 ) continue;

                // Sub total instead of total should exclude coupon usage
                $share = ( $percentage / 100 ) * $item['line_subtotal'];

                // Payout
                $gateway->mycred->add_creds(
                        'store_sale',
                        $product->post_author,
                        $share,
                        $gateway->profit_sharing_log,
                        $product->ID,
                        array( 'ref_type' => 'post' ),
                        $gateway->mycred_type
                );

        }

}

add_filter( 'mycred_add', 'restrict_points_to_once_per_day', 1, 3 );
function restrict_points_to_once_per_day( $reply, $request, $mycred ) {

    // If something else already declined this, respect it
    if ( $reply === false ) return $reply;

    extract( $request );

    // First we need to make sure this is a reference we need to limit
    $my_custom_references = array( 'companya', 'companyb', 'companyc' );
    if ( ! in_array( $ref, $my_custom_references ) ) return $reply;

    $today = mycred_get_total_by_time( 'today', 'now', $ref, $user_id, $type );

    // Decline if the user has received this amount once today.
    if ( $today >= $amount )
        return false;

    return $reply;

}

/**
 * Replace Post Template Tags
 * version 1.0
 */
function mycred_pro_temp_post_title_value( $content, $entry ) {

    $content = str_replace( '%post_title%', $entry->data, $content );
    return $content;

}

/* Your code goes above here. */