dev/core/#299 Fix mishandling of non decimal currency on additional payment form.

CRM/Contribute/Form/AdditionalPayment.php

@@ -174,7 +174,7 @@ public function setDefaultValues() {
       $defaults['total_amount'] = CRM_Utils_Money::format(abs($this->_refund), NULL, NULL, TRUE);
     }
     elseif ($this->_owed) {
-      $defaults['total_amount'] = number_format($this->_owed, 2);
+      $defaults['total_amount'] = CRM_Utils_Money::formatLocaleNumericRoundedForDefaultCurrency($this->_owed);
     }
 
     // Set $newCredit variable in template to control whether link to credit card mode is included

CRM/Utils/Money.php

@@ -95,26 +95,13 @@ public static function format($amount, $currency = NULL, $format = NULL, $onlyNu
     if (!$currency) {
       $currency = $config->defaultCurrency;
     }
-
-    // money_format() exists only in certain PHP install (CRM-650)
-    // setlocale() affects native gettext (CRM-11054, CRM-9976)
-    if (is_numeric($amount) && function_exists('money_format')) {
-      $lc = setlocale(LC_MONETARY, 0);
-      setlocale(LC_MONETARY, 'en_US.utf8', 'en_US', 'en_US.utf8', 'en_US', 'C');
-      $amount = money_format($valueFormat, $amount);
-      setlocale(LC_MONETARY, $lc);
-    }
-
-    $rep = array(
-      ',' => $config->monetaryThousandSeparator,
-      '.' => $config->monetaryDecimalPoint,
-    );
-
+    $amount = self::formatNumericByFormat($amount, $valueFormat);
     // If it contains tags, means that HTML was passed and the
     // amount is already converted properly,
     // so don't mess with it again.
+    // @todo deprecate handling for the html tags because .... WTF
     if (strpos($amount, '<') === FALSE) {
-      $amount = strtr($amount, $rep);
+      $amount = self::replaceCurrencySeparators($amount);
     }
 
     $replacements = array(
@@ -186,4 +173,105 @@ public static function equals($value1, $value2, $currency) {
     return TRUE;
   }
 
+  /**
+   * Format money for display (just numeric part) according to the current locale.
+   *
+   * This calls the underlying system function but does not handle currency separators.
+   *
+   * It's not totally clear when it changes the $amount value but has historical usage.
+   *
+   * @param $amount
+   *
+   * @return string
+   */
+  protected static function formatLocaleNumeric($amount) {
+    return self::formatNumericByFormat($amount, CRM_Core_Config::singleton()->moneyvalueformat);
+  }
+
+  /**
+   * Format money for display (just numeric part) according to the current locale with rounding.
+   *
+   * At this stage this is conceived as an internal function with the currency wrapper
+   * functions determining the number of places.
+   *
+   * This calls the underlying system function but does not handle currency separators.
+   *
+   * It's not totally clear when it changes the $amount value but has historical usage.
+   *
+   * @param string $amount
+   * @param int $numberOfPlaces
+   *
+   * @return string
+   */
+  protected static function formatLocaleNumericRounded($amount, $numberOfPlaces) {
+    return self::formatLocaleNumeric(round($amount, $numberOfPlaces));
+  }
+
+  /**
+   * Format money for display (just numeric part) according to the current locale with rounding.
+   *
+   * This handles both rounding & replacement of the currency separators for the locale.
+   *
+   * @param string $amount
+   * @param string $currency
+   *
+   * @return string
+   *   Formatted amount.
+   */
+  public static function formatLocaleNumericRoundedByCurrency($amount, $currency) {
+    $amount = self::formatLocaleNumericRounded($amount, self::getCurrencyPrecision($currency));
+    return self::replaceCurrencySeparators($amount);
+  }
+
+  /**
+   * Format money for display (just numeric part) according to the current locale with rounding based on the
+   * default currency for the site.
+   *
+   * @param $amount
+   * @return mixed
+   */
+  public static function formatLocaleNumericRoundedForDefaultCurrency($amount) {
+    return self::formatLocaleNumericRoundedByCurrency($amount, self::getCurrencyPrecision(CRM_Core_Config::singleton()->defaultCurrency));
+  }
+
+  /**
+   * Replace currency separators.
+   *
+   * @param string $amount
+   *
+   * @return string
+   */
+  protected static function replaceCurrencySeparators($amount) {
+    $config = CRM_Core_Config::singleton();
+    $rep = array(
+      ',' => $config->monetaryThousandSeparator,
+      '.' => $config->monetaryDecimalPoint,
+    );
+    return strtr($amount, $rep);
+  }
+
+  /**
+   * Format numeric part of currency by the passed in format.
+   *
+   * This is envisaged as an internal function, with wrapper functions defining valueFormat
+   * into easily understood functions / variables and handling separator conversions and
+   * rounding.
+   *
+   * @param string $amount
+   * @param string $valueFormat
+   *
+   * @return string
+   */
+  protected static function formatNumericByFormat($amount, $valueFormat) {
+    // money_format() exists only in certain PHP install (CRM-650)
+    // setlocale() affects native gettext (CRM-11054, CRM-9976)
+    if (is_numeric($amount) && function_exists('money_format')) {
+      $lc = setlocale(LC_MONETARY, 0);
+      setlocale(LC_MONETARY, 'en_US.utf8', 'en_US', 'en_US.utf8', 'en_US', 'C');
+      $amount = money_format($valueFormat, $amount);
+      setlocale(LC_MONETARY, $lc);
+    }
+    return $amount;
+  }
+
 }