' . esc_html__( 'Not enough data yet for a trend chart.', 'ael-42a' ) . '';
return;
}
$width = 600;
$height = 160;
$pad = 6;
$max = $y_max > 0 ? (float) $y_max : max( $series ) * 1.1;
$max = $max > 0 ? $max : 1;
$step = ( $width - 2 * $pad ) / ( $count - 1 );
$points = array();
foreach ( $series as $i => $value ) {
$x = $pad + $i * $step;
$y = $height - $pad - ( min( (float) $value, $max ) / $max ) * ( $height - 2 * $pad );
$points[] = round( $x, 1 ) . ',' . round( $y, 1 );
}
$line = implode( ' ', $points );
$area = $pad . ',' . ( $height - $pad ) . ' ' . $line . ' ' . round( $pad + ( $count - 1 ) * $step, 1 ) . ',' . ( $height - $pad );
list( $last_x, $last_y ) = explode( ',', $points[ $count - 1 ] );
echo '';
}
}
if ( ! function_exists( 'ael42a_trend_html' ) ) {
/**
* Render a small up/down trend line, e.g. "▲ 4.2 vs previous period".
*
* @param float|null $change Trend delta (positive = up).
* @param string $suffix Unit suffix appended to the number.
*/
function ael42a_trend_html( $change, $suffix = '' ) {
if ( null === $change || ! is_numeric( $change ) || 0.0 === round( (float) $change, 1 ) ) {
return;
}
$up = $change > 0;
$abs = abs( (float) $change );
$label = number_format_i18n( $abs, $abs >= 10 ? 0 : 1 ) . $suffix;
echo '';
echo esc_html( ( $up ? "\xE2\x96\xB2 " : "\xE2\x96\xBC " ) . $label . ' ' );
esc_html_e( 'vs previous period', 'ael-42a' );
echo '
';
}
}
?>
20 ? __( 'Positive', 'ael-42a' ) : ( $sentiment < -20 ? __( 'Negative', 'ael-42a' ) : __( 'Neutral', 'ael-42a' ) );
}
?>