'Security check failed.' ] ); } $raw = strtoupper( sanitize_text_field( $_POST['postcode'] ?? '' ) ); $postcode = preg_replace( '/\s+/', '', $raw ); // Validate UK postcode format if ( ! preg_match( '/^[A-Z]{1,2}[0-9][0-9A-Z]?[0-9][A-Z]{2}$/', $postcode ) ) { wp_send_json_error( [ 'message' => 'Please enter a valid UK postcode.' ] ); } // Transient cache — avoid hammering the API (cache for 24 hours) $cache_key = 'kindly_cov_' . $postcode; $cached = get_transient( $cache_key ); if ( $cached !== false ) { wp_send_json_success( $cached ); } // Call Ofcom API server-side (key never exposed to browser) $url = "https://api-proxy.ofcom.org.uk/mobile/coverage/{$postcode}"; $response = wp_remote_get( $url, [ 'headers' => [ 'Ocp-Apim-Subscription-Key' => KINDLY_OFCOM_KEY ], 'timeout' => 10, ] ); if ( is_wp_error( $response ) ) { wp_send_json_error( [ 'message' => 'Could not fetch coverage data. Please try again.' ] ); } $code = wp_remote_retrieve_response_code( $response ); if ( $code !== 200 ) { wp_send_json_error( [ 'message' => "Ofcom API returned status {$code}." ] ); } $body = json_decode( wp_remote_retrieve_body( $response ), true ); // Average signal values across all addresses in the postcode $addrs = $body[0]['Availability'] ?? []; $avg = function( $key ) use ( $addrs ) { $vals = array_filter( array_column( $addrs, $key ), fn($v) => $v > 0 ); return $vals ? (int) round( array_sum( $vals ) / count( $vals ) ) : 0; }; $data = [ 'o2' => [ 'voiceOutdoor' => $avg('TFVoiceOutdoor'), 'voiceIndoor' => $avg('TFVoiceIndoor'), 'data4gOutdoor' => $avg('TFData4GOutdoor'), 'data4gIndoor' => $avg('TFData4GIndoor'), 'data5gOutdoor' => $avg('TFData5GOutdoor'), 'data5gIndoor' => $avg('TFData5GIndoor'), ], 'plan' => [ 'voiceOutdoor' => $avg('EEVoiceOutdoor'), 'voiceIndoor' => $avg('EEVoiceIndoor'), 'data4gOutdoor' => $avg('EEData4GOutdoor'), 'data4gIndoor' => $avg('EEData4GIndoor'), 'data5gOutdoor' => $avg('EEData5GOutdoor'), 'data5gIndoor' => $avg('EEData5GIndoor'), ], 'postcode' => $raw, ]; set_transient( $cache_key, $data, DAY_IN_SECONDS ); wp_send_json_success( $data ); } // ── Shortcode [kindly_coverage] ────────────────────────────────────────────── add_shortcode( 'kindly_coverage', 'kindly_coverage_shortcode' ); function kindly_coverage_shortcode() { $nonce = wp_create_nonce( 'kindly_coverage_nonce' ); $ajax_url = admin_url( 'admin-ajax.php' ); ob_start(); ?>