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Break out area unit conversion to a separate function: farm_area_convert_area_units($input, $units).

This commit is contained in:
Michael Stenta 2018-07-04 14:46:36 -04:00
parent ae4e4aaf36
commit 369c0e2d5a
1 changed files with 45 additions and 16 deletions
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61
modules/farm/farm_area/farm_area.module
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@ -429,8 +429,7 @@ function farm_area_format_calculated_area($measurement, $units = TRUE) {
// Get the system of measurement.
$unit_system = farm_quantity_system_of_measurement();
// Switch through available unit systems and generate a formatted string.
$conversion = '';
// Convert the units based on system of measurement and area size.
$unit = '';
switch ($unit_system) {
@ -438,12 +437,10 @@ function farm_area_format_calculated_area($measurement, $units = TRUE) {
case 'metric':
// Convert to hectares.
$conversion = '0.0001';
$unit = 'hectares';
// If it is less than 0.25 hectares, use square meters instead.
if ($measurement * $conversion < 0.25) {
$conversion = '1';
if (farm_area_convert_area_units($measurement, 'hectares') < 0.25) {
$unit = 'square meters';
}
break;
@ -452,29 +449,22 @@ function farm_area_format_calculated_area($measurement, $units = TRUE) {
case 'us':
// Convert to acres.
$conversion = '0.000247105';
$unit = 'acres';
// If it is less than 0.25 acres, use square feet instead.
if ($measurement * $conversion < 0.25) {
$conversion = '10.7639';
if (farm_area_convert_area_units($measurement, 'acres') < 0.25) {
$unit = 'square feet';
}
break;
}
// If a unit and conversion were not found, bail.
if (empty($unit) || empty($conversion)) {
// If a unit was not found, bail.
if (empty($unit)) {
return '0';
}
// Convert to the desired units.
if (function_exists('bcmul')) {
$measurement = bcmul($measurement, $conversion);
}
else {
$measurement = $measurement * $conversion;
}
$measurement = farm_area_convert_area_units($measurement, $unit);
// Round to 2 decimal precision.
$output = (string) round($measurement, 2);
@ -485,3 +475,42 @@ function farm_area_format_calculated_area($measurement, $units = TRUE) {
}
return $output;
}
/**
* Convert an area from square meters to another unit.
*
* @param $input
* The number to convert (assumed to be in square meters).
* @param string $unit
* Specify the units to convert to. Must be one of: hectares, acres, or
* square feet.
*
* @return string
* Returns the converted number as string.
*/
function farm_area_convert_area_units($input, $unit) {
// Define the available conversion units and their coefficients.
$conversion = array(
'square meters' => '1',
'hectares' => '0.0001',
'square feet' => '10.7639',
'acres' => '0.000247105',
);
// If the unit is not in the list, do nothing.
if (!array_key_exists($unit, $conversion)) {
return $input;
}
// Convert to the desired units.
if (function_exists('bcmul')) {
$output = bcmul($input, $conversion[$unit]);
}
else {
$output = $input * $conversion;
}
// Return the result.
return $output;
}