woocommerce_get_price_html.php

<?php
/**
 * Filter the price html on shop and product pages
 * @todo Display correct variation price range in variation.php
 */
function prefix_get_price_html( $price, $product ) {

	$rules = get_option( 'wcfad_dynamic_pricing_rules', false );

	// Get the best user role defined price
	$price = $product->get_price();
	$best_price = wcfad_get_product_price_by_role( $product, $price );
	
	// Use this to return the standard price with no extra wording if there's no discount for this product
	if( $price == $best_price ) {

		$price_html = sprintf(
			'<p class="price">%s</p>',
			wc_price( $price )
		);

		return $price_html;

	}

	// Check for variation pricing
	if( $product->is_type( 'variable' ) ) {

		$prices = $product->get_variation_prices( true );
		$min_variation_price = wcfad_get_product_price_by_role( $product, current( $prices['price'] ) );
    $max_variation_price = wcfad_get_product_price_by_role( $product, end( $prices['price'] ) );
		$min_max = array( $min_variation_price, $max_variation_price );

	} else {

		$min_max = array( $best_price, $best_price );

	}

	$qualifies = false;
	$product_id = $product->get_id();

	if( $rules ) {

		foreach( $rules as $rule ) {

			$validation_function = '';

			// Iterate through each rule
			if( ! empty( $rule['rule'] ) ) {

				// Check if this product is covered by a pricing rule
				$qualifies = false;
				$label = isset( $rule['label'] ) ? $rule['label'] : '';
				$applies_to = isset( $rule['applies_to'] ) ? $rule['applies_to'] : 'all';

				// The list of products that qualify for the offer
				if( $applies_to == 'all' ) {

					$qualifies = true;
					$min_max = wcfad_get_min_max_pricing( $min_max, $rule, $best_price );
					// break;

				} else if( $applies_to == 'products' ) {

					$buy_products = isset( $rule['buy_products'] ) ? $rule['buy_products'] : 'all';
					if( $buy_products == 'all' || ( is_array( $buy_products ) && in_array( $product_id, $buy_products ) ) ) {
						$qualifies = true;
						$min_max = wcfad_get_min_max_pricing( $min_max, $rule, $best_price );
						// break;
					}

				}	else if( $applies_to == 'categories' ) {

					$buy_categories = isset( $rule['buy_categories'] ) ? $rule['buy_categories'] : 'all';
					if( $buy_products == 'all' || ( is_array( $buy_products ) && has_term( $get_categories, 'product_cat', $product_id ) ) ) {
						$qualifies = true;
						$min_max = wcfad_get_min_max_pricing( $min_max, $rule, $best_price );
						// break;
					}

				}

			}

		}

	}

	if( $min_max[0] != $min_max[1] ) {

		// Display the formatted price range
		$price_html = sprintf(
			'<p class="price">From %s</p>',
			wc_price( $min_max[0] )
		);

	} else {

		$price_html = sprintf(
			'<p class="price">From %s</p>',
			wc_price( $best_price )
		);

	}

	if( $qualifies ) {

		$price_html = sprintf(
			'%s<br><span class="wcfad-rule-label">%s</span>',
			$price_html,
			$label
		);

	}

	return $price_html;

}
add_filter( 'woocommerce_get_price_html', 'prefix_get_price_html', 999, 2 );