Revert "Revert "Language names via intl library.""

This reverts commit 4f35efa0ba.

library/intl/src/Country/Country.php

@@ -0,0 +1,168 @@
+<?php
+
+namespace CommerceGuys\Intl\Country;
+
+class Country implements CountryInterface
+{
+    /**
+     * The two-letter country code.
+     *
+     * @var string
+     */
+    protected $countryCode;
+
+    /**
+     * The country name.
+     *
+     * @var string
+     */
+    protected $name;
+
+    /**
+     * The three-letter country code.
+     *
+     * @var string
+     */
+    protected $threeLetterCode;
+
+    /**
+     * The numeric country code.
+     *
+     * @var string
+     */
+    protected $numericCode;
+
+    /**
+     * The country telephone code.
+     *
+     * @var string
+     */
+    protected $telephoneCode;
+
+    /**
+     * The country locale (i.e. "en_US").
+     *
+     * The country name is locale specific.
+     *
+     * @var string
+     */
+    protected $locale;
+
+    /**
+     * Returns the string representation of the Country.
+     *
+     * @return string
+     */
+    public function __toString()
+    {
+        return $this->getCountryCode();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getCountryCode()
+    {
+        return $this->countryCode;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setCountryCode($countryCode)
+    {
+        $this->countryCode = $countryCode;
+
+        return $this;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getName()
+    {
+        return $this->name;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setName($name)
+    {
+        $this->name = $name;
+
+        return $this;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getThreeLetterCode()
+    {
+        return $this->threeLetterCode;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setThreeLetterCode($threeLetterCode)
+    {
+        $this->threeLetterCode = $threeLetterCode;
+
+        return $this;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getNumericCode()
+    {
+        return $this->numericCode;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setNumericCode($numericCode)
+    {
+        $this->numericCode = $numericCode;
+
+        return $this;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getTelephoneCode()
+    {
+        return $this->telephoneCode;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setTelephoneCode($telephoneCode)
+    {
+        $this->telephoneCode = $telephoneCode;
+
+        return $this;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getLocale()
+    {
+        return $this->locale;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setLocale($locale)
+    {
+        $this->locale = $locale;
+
+        return $this;
+    }
+}

library/intl/src/Country/CountryInterface.php

@@ -0,0 +1,99 @@
+<?php
+
+namespace CommerceGuys\Intl\Country;
+
+interface CountryInterface
+{
+    /**
+     * Gets the two-letter country code.
+     *
+     * @return string
+     */
+    public function getCountryCode();
+
+    /**
+     * Sets the two-letter country code.
+     *
+     * @param string $countryCode The two-letter country code.
+     */
+    public function setCountryCode($countryCode);
+
+    /**
+     * Gets the country name.
+     *
+     * Note that certain locales have incomplete translations, in which
+     * case the english version of the country name is used instead.
+     *
+     * @return string
+     */
+    public function getName();
+
+    /**
+     * Sets the country name.
+     *
+     * @param string $name The country name.
+     */
+    public function setName($name);
+
+    /**
+     * Gets the three-letter country code.
+     *
+     * Note that not every country has a three-letter code.
+     * CLDR lists "Canary Islands" (IC) and "Ceuta and Melilla" (EA)
+     * as separate countries, even though they are formally a part of Spain
+     * and have no three-letter or numeric ISO codes.
+     *
+     * @return string|null
+     */
+    public function getThreeLetterCode();
+
+    /**
+     * Sets the three-letter country code.
+     *
+     * @param string $threeLetterCode The three-letter country code.
+     */
+    public function setThreeLetterCode($threeLetterCode);
+
+    /**
+     * Gets the numeric country code.
+     *
+     * The numeric code has three digits, and the first one can be a zero,
+     * hence the need to pass it around as a string.
+     *
+     * Note that not every country has a numeric code.
+     * CLDR lists "Canary Islands" (IC) and "Ceuta and Melilla" (EA)
+     * as separate countries, even though they are formally a part of Spain
+     * and have no three-letter or numeric ISO codes.
+     * "Ascension Island" (AE) also has no numeric code, even though it has a
+     * three-letter code.
+     *
+     * @return string|null
+     */
+    public function getNumericCode();
+
+    /**
+     * Sets the numeric country code.
+     *
+     * @param string $numericCode The numeric country code.
+     */
+    public function setNumericCode($numericCode);
+
+    /**
+     * Gets the country telephone code.
+     *
+     * Also known as the calling code.
+     *
+     * Note that not every country has a telephone code.
+     * Right now Tristan da Cunha (TI) is the only such example.
+     *
+     * @return string|null
+     */
+    public function getTelephoneCode();
+
+    /**
+     * Sets the country telephone code.
+     *
+     * @param string $telephoneCode The telephone code.
+     */
+    public function setTelephoneCode($telephoneCode);
+}

library/intl/src/Country/CountryRepository.php

@@ -0,0 +1,124 @@
+<?php
+
+namespace CommerceGuys\Intl\Country;
+
+use CommerceGuys\Intl\LocaleResolverTrait;
+use CommerceGuys\Intl\Exception\UnknownCountryException;
+
+/**
+ * Manages countries based on JSON definitions.
+ */
+class CountryRepository implements CountryRepositoryInterface
+{
+    use LocaleResolverTrait;
+
+    /**
+     * Base country definitions.
+     *
+     * Contains data common to all locales, such as the country numeric,
+     * three-letter, telephone codes.
+     *
+     * @var array
+     */
+    protected $baseDefinitions = array();
+
+    /**
+     * Per-locale country definitions.
+     *
+     * @var array
+     */
+    protected $definitions = array();
+
+    /**
+     * Creates a CountryRepository instance.
+     *
+     * @param string $definitionPath The path to the country definitions.
+     *                               Defaults to 'resources/country'.
+     */
+    public function __construct($definitionPath = null)
+    {
+        $this->definitionPath = $definitionPath ? $definitionPath : __DIR__ . '/../../resources/country/';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function get($countryCode, $locale = null, $fallbackLocale = null)
+    {
+        $locale = $this->resolveLocale($locale, $fallbackLocale);
+        $definitions = $this->loadDefinitions($locale);
+        if (!isset($definitions[$countryCode])) {
+            throw new UnknownCountryException($countryCode);
+        }
+
+        return $this->createCountryFromDefinition($definitions[$countryCode], $locale);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getAll($locale = null, $fallbackLocale = null)
+    {
+        $locale = $this->resolveLocale($locale, $fallbackLocale);
+        $definitions = $this->loadDefinitions($locale);
+        $countries = array();
+        foreach ($definitions as $countryCode => $definition) {
+            $countries[$countryCode] = $this->createCountryFromDefinition($definition, $locale);
+        }
+
+        return $countries;
+    }
+
+    /**
+     * Loads the country definitions for the provided locale.
+     *
+     * @param string $locale The desired locale.
+     *
+     * @return array
+     */
+    protected function loadDefinitions($locale)
+    {
+        if (!isset($this->definitions[$locale])) {
+            $filename = $this->definitionPath . $locale . '.json';
+            $this->definitions[$locale] = json_decode(file_get_contents($filename), true);
+
+            // Make sure the base definitions have been loaded.
+            if (empty($this->baseDefinitions)) {
+                $this->baseDefinitions = json_decode(file_get_contents($this->definitionPath . 'base.json'), true);
+            }
+            // Merge-in base definitions.
+            foreach ($this->definitions[$locale] as $countryCode => $definition) {
+                $this->definitions[$locale][$countryCode] += $this->baseDefinitions[$countryCode];
+            }
+        }
+
+        return $this->definitions[$locale];
+    }
+
+    /**
+     * Creates a country object from the provided definition.
+     *
+     * @param array  $definition The country definition.
+     * @param string $locale     The locale of the country definition.
+     *
+     * @return Country
+     */
+    protected function createCountryFromDefinition(array $definition, $locale)
+    {
+        $country = new Country();
+        $country->setCountryCode($definition['code']);
+        $country->setName($definition['name']);
+        $country->setLocale($locale);
+        if (isset($definition['three_letter_code'])) {
+            $country->setThreeLetterCode($definition['three_letter_code']);
+        }
+        if (isset($definition['numeric_code'])) {
+            $country->setNumericCode($definition['numeric_code']);
+        }
+        if (isset($definition['telephone_code'])) {
+            $country->setTelephoneCode($definition['telephone_code']);
+        }
+
+        return $country;
+    }
+}

library/intl/src/Country/CountryRepositoryInterface.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace CommerceGuys\Intl\Country;
+
+/**
+ * Country repository interface.
+ */
+interface CountryRepositoryInterface
+{
+    /**
+     * Returns a country instance matching the provided country code.
+     *
+     * @param string $countryCode    The country code.
+     * @param string $locale         The locale (i.e. fr-FR).
+     * @param string $fallbackLocale A fallback locale (i.e "en").
+     *
+     * @return CountryInterface
+     */
+    public function get($countryCode, $locale = null, $fallbackLocale = null);
+
+    /**
+     * Returns all available country instances.
+     *
+     * @param string $locale         The locale (i.e. fr-FR).
+     * @param string $fallbackLocale A fallback locale (i.e "en").
+     *
+     * @return array An array of countries implementing the CountryInterface,
+     *               keyed by country code.
+     */
+    public function getAll($locale = null, $fallbackLocale = null);
+}

library/intl/src/Currency/Currency.php

@@ -0,0 +1,168 @@
+<?php
+
+namespace CommerceGuys\Intl\Currency;
+
+class Currency implements CurrencyInterface
+{
+    /**
+     * The alphanumeric currency code.
+     *
+     * @var string
+     */
+    protected $currencyCode;
+
+    /**
+     * The currency name.
+     *
+     * @var string
+     */
+    protected $name;
+
+    /**
+     * The numeric currency code.
+     *
+     * @var string
+     */
+    protected $numericCode;
+
+    /**
+     * The currency symbol.
+     *
+     * @var string
+     */
+    protected $symbol;
+
+    /**
+     * The number of fraction digits.
+     *
+     * @var int
+     */
+    protected $fractionDigits;
+
+    /**
+     * The currency locale (i.e. "en_US").
+     *
+     * The currency name and symbol are locale specific.
+     *
+     * @var string
+     */
+    protected $locale;
+
+    /**
+     * Returns the string representation of the currency.
+     *
+     * @return string
+     */
+    public function __toString()
+    {
+        return $this->getCurrencyCode();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getCurrencyCode()
+    {
+        return $this->currencyCode;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setCurrencyCode($currencyCode)
+    {
+        $this->currencyCode = $currencyCode;
+
+        return $this;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getName()
+    {
+        return $this->name;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setName($name)
+    {
+        $this->name = $name;
+
+        return $this;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getNumericCode()
+    {
+        return $this->numericCode;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setNumericCode($numericCode)
+    {
+        $this->numericCode = $numericCode;
+
+        return $this;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getSymbol()
+    {
+        return $this->symbol;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setSymbol($symbol)
+    {
+        $this->symbol = $symbol;
+
+        return $this;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getFractionDigits()
+    {
+        return $this->fractionDigits;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setFractionDigits($fractionDigits)
+    {
+        $this->fractionDigits = $fractionDigits;
+
+        return $this;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getLocale()
+    {
+        return $this->locale;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setLocale($locale)
+    {
+        $this->locale = $locale;
+
+        return $this;
+    }
+}

library/intl/src/Currency/CurrencyInterface.php

@@ -0,0 +1,82 @@
+<?php
+
+namespace CommerceGuys\Intl\Currency;
+
+interface CurrencyInterface
+{
+    /**
+     * Gets the alphabetic currency code.
+     *
+     * @return string
+     */
+    public function getCurrencyCode();
+
+    /**
+     * Sets the alphabetic currency code.
+     *
+     * @param string $currencyCode The alphabetic currency code.
+     */
+    public function setCurrencyCode($currencyCode);
+
+    /**
+     * Gets the currency name.
+     *
+     * @return string
+     */
+    public function getName();
+
+    /**
+     * Sets the currency name.
+     *
+     * @param string $name The currency name.
+     */
+    public function setName($name);
+
+    /**
+     * Gets the numeric currency code.
+     *
+     * The numeric code has three digits, and the first one can be a zero,
+     * hence the need to pass it around as a string.
+     *
+     * @return string
+     */
+    public function getNumericCode();
+
+    /**
+     * Sets the numeric currency code.
+     *
+     * @param string $numericCode The numeric currency code.
+     */
+    public function setNumericCode($numericCode);
+
+    /**
+     * Gets the currency symbol.
+     *
+     * @return string
+     */
+    public function getSymbol();
+
+    /**
+     * Sets the currency symbol.
+     *
+     * @param string $symbol The currency symbol.
+     */
+    public function setSymbol($symbol);
+
+    /**
+     * Gets the number of fraction digits.
+     *
+     * Used when rounding or formatting an amount for display.
+     * Actual storage precision can be greater.
+     *
+     * @return int
+     */
+    public function getFractionDigits();
+
+    /**
+     * Sets the number of fraction digits.
+     *
+     * @param int $fractionDigits The number of fraction digits.
+     */
+    public function setFractionDigits($fractionDigits);
+}

library/intl/src/Currency/CurrencyRepository.php

@@ -0,0 +1,122 @@
+<?php
+
+namespace CommerceGuys\Intl\Currency;
+
+use CommerceGuys\Intl\LocaleResolverTrait;
+use CommerceGuys\Intl\Exception\UnknownCurrencyException;
+
+/**
+ * Manages currencies based on JSON definitions.
+ */
+class CurrencyRepository implements CurrencyRepositoryInterface
+{
+    use LocaleResolverTrait;
+
+    /**
+     * Base currency definitions.
+     *
+     * Contains data common to all locales, such as the currency numeric
+     * code, number of fraction digits.
+     *
+     * @var array
+     */
+    protected $baseDefinitions = array();
+
+    /**
+     * Per-locale currency definitions.
+     *
+     * @var array
+     */
+    protected $definitions = array();
+
+    /**
+     * Creates a CurrencyRepository instance.
+     *
+     * @param string $definitionPath The path to the currency definitions.
+     *                               Defaults to 'resources/currency'.
+     */
+    public function __construct($definitionPath = null)
+    {
+        $this->definitionPath = $definitionPath ? $definitionPath : __DIR__ . '/../../resources/currency/';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function get($currencyCode, $locale = null, $fallbackLocale = null)
+    {
+        $locale = $this->resolveLocale($locale, $fallbackLocale);
+        $definitions = $this->loadDefinitions($locale);
+        if (!isset($definitions[$currencyCode])) {
+            throw new UnknownCurrencyException($currencyCode);
+        }
+
+        return $this->createCurrencyFromDefinition($definitions[$currencyCode], $locale);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getAll($locale = null, $fallbackLocale = null)
+    {
+        $locale = $this->resolveLocale($locale, $fallbackLocale);
+        $definitions = $this->loadDefinitions($locale);
+        $currencies = array();
+        foreach ($definitions as $currencyCode => $definition) {
+            $currencies[$currencyCode] = $this->createCurrencyFromDefinition($definition, $locale);
+        }
+
+        return $currencies;
+    }
+
+    /**
+     * Loads the currency definitions for the provided locale.
+     *
+     * @param string $locale The desired locale.
+     *
+     * @return array
+     */
+    protected function loadDefinitions($locale)
+    {
+        if (!isset($this->definitions[$locale])) {
+            $filename = $this->definitionPath . $locale . '.json';
+            $this->definitions[$locale] = json_decode(file_get_contents($filename), true);
+
+            // Make sure the base definitions have been loaded.
+            if (empty($this->baseDefinitions)) {
+                $this->baseDefinitions = json_decode(file_get_contents($this->definitionPath . 'base.json'), true);
+            }
+            // Merge-in base definitions.
+            foreach ($this->definitions[$locale] as $currencyCode => $definition) {
+                $this->definitions[$locale][$currencyCode] += $this->baseDefinitions[$currencyCode];
+            }
+        }
+
+        return $this->definitions[$locale];
+    }
+
+    /**
+     * Creates a currency object from the provided definition.
+     *
+     * @param array  $definition The currency definition.
+     * @param string $locale     The locale of the currency definition.
+     *
+     * @return Currency
+     */
+    protected function createCurrencyFromDefinition(array $definition, $locale)
+    {
+        if (!isset($definition['fraction_digits'])) {
+            $definition['fraction_digits'] = 2;
+        }
+
+        $currency = new Currency();
+        $currency->setCurrencyCode($definition['code']);
+        $currency->setName($definition['name']);
+        $currency->setNumericCode($definition['numeric_code']);
+        $currency->setFractionDigits($definition['fraction_digits']);
+        $currency->setSymbol($definition['symbol']);
+        $currency->setLocale($locale);
+
+        return $currency;
+    }
+}

library/intl/src/Currency/CurrencyRepositoryInterface.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace CommerceGuys\Intl\Currency;
+
+/**
+ * Currency repository interface.
+ */
+interface CurrencyRepositoryInterface
+{
+    /**
+     * Returns a currency instance matching the provided currency code.
+     *
+     * @param string $currencyCode   The currency code.
+     * @param string $locale         The locale (i.e. fr-FR).
+     * @param string $fallbackLocale A fallback locale (i.e "en").
+     *
+     * @return CurrencyInterface
+     */
+    public function get($currencyCode, $locale = null, $fallbackLocale = null);
+
+    /**
+     * Returns all available currency instances.
+     *
+     * @param string $locale         The locale (i.e. fr-FR).
+     * @param string $fallbackLocale A fallback locale (i.e "en").
+     *
+     * @return array An array of currencies implementing the CurrencyInterface,
+     *               keyed by currency code.
+     */
+    public function getAll($locale = null, $fallbackLocale = null);
+}

library/intl/src/Exception/ExceptionInterface.php

@@ -0,0 +1,7 @@
+<?php
+
+namespace CommerceGuys\Intl\Exception;
+
+interface ExceptionInterface
+{
+}

library/intl/src/Exception/InvalidArgumentException.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace CommerceGuys\Intl\Exception;
+
+/**
+ * This exception is thrown when an invalid argument is passed to a method.
+ * For example, a float amount instead of the expected string amount.
+ */
+class InvalidArgumentException extends \InvalidArgumentException implements ExceptionInterface
+{
+}

library/intl/src/Exception/UnknownCountryException.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace CommerceGuys\Intl\Exception;
+
+/**
+ * This exception is thrown when an unknown country code is passed to the
+ * CountryRepository.
+ */
+class UnknownCountryException extends InvalidArgumentException implements ExceptionInterface
+{
+}

library/intl/src/Exception/UnknownCurrencyException.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace CommerceGuys\Intl\Exception;
+
+/**
+ * This exception is thrown when an unknown currency code is passed to the
+ * CurrencyRepository.
+ */
+class UnknownCurrencyException extends InvalidArgumentException implements ExceptionInterface
+{
+}

library/intl/src/Exception/UnknownLanguageException.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace CommerceGuys\Intl\Exception;
+
+/**
+ * This exception is thrown when an unknown language code is passed to the
+ * LanguageRepository.
+ */
+class UnknownLanguageException extends InvalidArgumentException implements ExceptionInterface
+{
+}

library/intl/src/Exception/UnknownLocaleException.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace CommerceGuys\Intl\Exception;
+
+/**
+ * This exception is thrown when an unknown locale is passed to a repository.
+ */
+class UnknownLocaleException extends InvalidArgumentException implements ExceptionInterface
+{
+}

library/intl/src/Formatter/NumberFormatter.php

@@ -0,0 +1,406 @@
+<?php
+
+namespace CommerceGuys\Intl\Formatter;
+
+use CommerceGuys\Intl\Currency\CurrencyInterface;
+use CommerceGuys\Intl\Exception\InvalidArgumentException;
+use CommerceGuys\Intl\NumberFormat\NumberFormatInterface;
+
+/**
+ * Formats numbers using locale-specific patterns.
+ */
+class NumberFormatter implements NumberFormatterInterface
+{
+    /**
+     * The number format.
+     *
+     * @var NumberFormatInterface
+     */
+    protected $numberFormat;
+
+    /**
+     * The number pattern used to format positive numbers.
+     *
+     * @var string
+     */
+    protected $positivePattern;
+
+    /**
+     * The number pattern used to format negative numbers.
+     *
+     * @var string
+     */
+    protected $negativePattern;
+
+    /**
+     * Whether grouping is used.
+     *
+     * @var bool
+     */
+    protected $groupingUsed;
+
+    /**
+     * The size of the group of digits closest to the decimal point.
+     *
+     * @var int
+     */
+    protected $primaryGroupSize;
+
+    /**
+     * The size of every group of digits after the primary group.
+     *
+     * @var int
+     */
+    protected $secondaryGroupSize;
+
+    /**
+     * The minimum number of fraction digits to show.
+     *
+     * @var int
+     */
+    protected $minimumFractionDigits;
+
+    /**
+     * The maximum number of fraction digits to show.
+     *
+     * @var int
+     */
+    protected $maximumFractionDigits;
+
+    /**
+     * The currency display style.
+     *
+     * @var int
+     */
+    protected $currencyDisplay;
+
+    /**
+     * Localized digits.
+     *
+     * @var array
+     */
+    protected $digits = array(
+        NumberFormatInterface::NUMBERING_SYSTEM_ARABIC => array(
+            0 => '٠', 1 => '١', 2 => '٢', 3 => '٣', 4 => '٤',
+            5 => '٥', 6 => '٦', 7 => '٧', 8 => '٨', 9 => '٩',
+        ),
+        NumberFormatInterface::NUMBERING_SYSTEM_ARABIC_EXTENDED => array(
+            0 => '۰', 1 => '۱', 2 => '۲', 3 => '۳', 4 => '۴',
+            5 => '۵', 6 => '۶', 7 => '۷', 8 => '۸', 9 => '۹',
+        ),
+        NumberFormatInterface::NUMBERING_SYSTEM_BENGALI => array(
+            0 => '০', 1 => '১', 2 => '২', 3 => '৩', 4 => '৪',
+            5 => '৫', 6 => '৬', 7 => '৭', 8 => '৮', 9 => '৯',
+        ),
+        NumberFormatInterface::NUMBERING_SYSTEM_DEVANAGARI => array(
+            0 => '०', 1 => '१', 2 => '२', 3 => '३', 4 => '४',
+            5 => '५', 6 => '६', 7 => '७', 8 => '८', 9 => '९',
+        ),
+    );
+
+    /**
+     * Creaes a NumberFormatter instance.
+     *
+     * @param NumberFormatInterface $numberFormat The number format.
+     * @param int                   $style        The formatting style.
+     *
+     * @throws InvalidArgumentException
+     */
+    public function __construct(NumberFormatInterface $numberFormat, $style = self::DECIMAL)
+    {
+        $availablePatterns = array(
+            self::DECIMAL => $numberFormat->getDecimalPattern(),
+            self::PERCENT => $numberFormat->getPercentPattern(),
+            self::CURRENCY => $numberFormat->getCurrencyPattern(),
+            self::CURRENCY_ACCOUNTING => $numberFormat->getAccountingCurrencyPattern(),
+        );
+        if (!array_key_exists($style, $availablePatterns)) {
+            // Unknown type.
+            throw new InvalidArgumentException('Unknown format style provided to NumberFormatter::__construct().');
+        }
+
+        // Split the selected pattern into positive and negative patterns.
+        $patterns = explode(';', $availablePatterns[$style]);
+        if (!isset($patterns[1])) {
+            // No explicit negative pattern was provided, construct it.
+            $patterns[1] = '-' . $patterns[0];
+        }
+
+        $this->numberFormat = $numberFormat;
+        $this->positivePattern = $patterns[0];
+        $this->negativePattern = $patterns[1];
+        $this->groupingUsed = (strpos($this->positivePattern, ',') !== false);
+        // This pattern has number groups, parse them.
+        if ($this->groupingUsed) {
+            preg_match('/#+0/', $this->positivePattern, $primaryGroupMatches);
+            $this->primaryGroupSize = $this->secondaryGroupSize = strlen($primaryGroupMatches[0]);
+            $numberGroups = explode(',', $this->positivePattern);
+            if (count($numberGroups) > 2) {
+                // This pattern has a distinct secondary group size.
+                $this->secondaryGroupSize = strlen($numberGroups[1]);
+            }
+        }
+
+        // Initialize the fraction digit settings for decimal and percent
+        // styles only. The currency ones will default to the currency values.
+        if (in_array($style, array(self::DECIMAL, self::PERCENT))) {
+            $this->minimumFractionDigits = 0;
+            $this->maximumFractionDigits = 3;
+        }
+        $this->currencyDisplay = self::CURRENCY_DISPLAY_SYMBOL;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function format($value)
+    {
+        if (!is_numeric($value)) {
+            $message = sprintf('The provided value "%s" must be a valid number or numeric string.', $value);
+            throw new InvalidArgumentException($message);
+        }
+
+        // Ensure that the value is positive and has the right number of digits.
+        $negative = (bccomp('0', $value, 12) == 1);
+        $signMultiplier = $negative ? '-1' : '1';
+        $value = bcdiv($value, $signMultiplier, $this->maximumFractionDigits);
+        // Split the number into major and minor digits.
+        $valueParts = explode('.', $value);
+        $majorDigits = $valueParts[0];
+        // Account for maximumFractionDigits = 0, where the number won't
+        // have a decimal point, and $valueParts[1] won't be set.
+        $minorDigits = isset($valueParts[1]) ? $valueParts[1] : '';
+
+        if ($this->groupingUsed) {
+            // Reverse the major digits, since they are grouped from the right.
+            $majorDigits = array_reverse(str_split($majorDigits));
+            // Group the major digits.
+            $groups = array();
+            $groups[] = array_splice($majorDigits, 0, $this->primaryGroupSize);
+            while (!empty($majorDigits)) {
+                $groups[] = array_splice($majorDigits, 0, $this->secondaryGroupSize);
+            }
+            // Reverse the groups and the digits inside of them.
+            $groups = array_reverse($groups);
+            foreach ($groups as &$group) {
+                $group = implode(array_reverse($group));
+            }
+            // Reconstruct the major digits.
+            $majorDigits = implode(',', $groups);
+        }
+
+        if ($this->minimumFractionDigits < $this->maximumFractionDigits) {
+            // Strip any trailing zeroes.
+            $minorDigits = rtrim($minorDigits, '0');
+            if (strlen($minorDigits) < $this->minimumFractionDigits) {
+                // Now there are too few digits, re-add trailing zeroes
+                // until the desired length is reached.
+                $neededZeroes = $this->minimumFractionDigits - strlen($minorDigits);
+                $minorDigits .= str_repeat('0', $neededZeroes);
+            }
+        }
+
+        // Assemble the final number and insert it into the pattern.
+        $value = $minorDigits ? $majorDigits . '.' . $minorDigits : $majorDigits;
+        $pattern = $negative ? $this->negativePattern : $this->positivePattern;
+        $value = preg_replace('/#(?:[\.,]#+)*0(?:[,\.][0#]+)*/', $value, $pattern);
+
+        // Localize the number.
+        $value = $this->replaceDigits($value);
+        $value = $this->replaceSymbols($value);
+
+        return $value;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function formatCurrency($value, CurrencyInterface $currency)
+    {
+        // Use the currency defaults if the values weren't set by the caller.
+        $resetMinimumFractionDigits = $resetMaximumFractionDigits = false;
+        if (!isset($this->minimumFractionDigits)) {
+            $this->minimumFractionDigits = $currency->getFractionDigits();
+            $resetMinimumFractionDigits = true;
+        }
+        if (!isset($this->maximumFractionDigits)) {
+            $this->maximumFractionDigits = $currency->getFractionDigits();
+            $resetMaximumFractionDigits = true;
+        }
+
+        // Format the decimal part of the value first.
+        $value = $this->format($value);
+
+        // Reset the fraction digit settings, so that they don't affect
+        // future formattings with different currencies.
+        if ($resetMinimumFractionDigits) {
+            $this->minimumFractionDigits = null;
+        }
+        if ($resetMaximumFractionDigits) {
+            $this->maximumFractionDigits = null;
+        }
+
+        // Determine whether to show the currency symbol or the currency code.
+        if ($this->currencyDisplay == self::CURRENCY_DISPLAY_SYMBOL) {
+            $symbol = $currency->getSymbol();
+        } else {
+            $symbol = $currency->getCurrencyCode();
+        }
+
+        return str_replace('¤', $symbol, $value);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function parseCurrency($value, CurrencyInterface $currency)
+    {
+        $replacements = array(
+            // Convert the localized symbols back to their original form.
+            $this->numberFormat->getDecimalSeparator() => '.',
+            $this->numberFormat->getPlusSign() => '+',
+            $this->numberFormat->getMinusSign() => '-',
+
+            // Strip any grouping separators, the currency code or symbol.
+            $this->numberFormat->getGroupingSeparator() => '',
+            $currency->getCurrencyCode() => '',
+            $currency->getSymbol() => '',
+
+            // Strip whitespace (spaces and non-breaking spaces).
+            ' ' => '',
+            chr(0xC2) . chr(0xA0) => '',
+        );
+        $numberingSystem = $this->numberFormat->getNumberingSystem();
+        if (isset($this->digits[$numberingSystem])) {
+            // Convert the localized digits back to latin.
+            $replacements += array_flip($this->digits[$numberingSystem]);
+        }
+
+        $value = strtr($value, $replacements);
+        if (substr($value, 0, 1) == '(' && substr($value, -1, 1) == ')') {
+            // This is an accounting formatted negative number.
+            $value = '-' . str_replace(array('(', ')'), '', $value);
+        }
+
+        return is_numeric($value) ? $value : false;
+    }
+
+    /**
+     * Replaces digits with their localized equivalents.
+     *
+     * @param string $value The value being formatted.
+     *
+     * @return string
+     */
+    protected function replaceDigits($value)
+    {
+        $numberingSystem = $this->numberFormat->getNumberingSystem();
+        if (isset($this->digits[$numberingSystem])) {
+            $value = strtr($value, $this->digits[$numberingSystem]);
+        }
+
+        return $value;
+    }
+
+    /**
+     * Replaces number symbols with their localized equivalents.
+     *
+     * @param string $value The value being formatted.
+     *
+     * @return string
+     *
+     * @see http://cldr.unicode.org/translation/number-symbols
+     */
+    protected function replaceSymbols($value)
+    {
+        $replacements = array(
+            '.' => $this->numberFormat->getDecimalSeparator(),
+            ',' => $this->numberFormat->getGroupingSeparator(),
+            '+' => $this->numberFormat->getPlusSign(),
+            '-' => $this->numberFormat->getMinusSign(),
+            '%' => $this->numberFormat->getPercentSign(),
+        );
+
+        return strtr($value, $replacements);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getNumberFormat()
+    {
+        return $this->numberFormat;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getMinimumFractionDigits()
+    {
+        return $this->minimumFractionDigits;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setMinimumFractionDigits($minimumFractionDigits)
+    {
+        $this->minimumFractionDigits = $minimumFractionDigits;
+
+        return $this;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getMaximumFractionDigits()
+    {
+        return $this->maximumFractionDigits;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setMaximumFractionDigits($maximumFractionDigits)
+    {
+        $this->maximumFractionDigits = $maximumFractionDigits;
+
+        return $this;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isGroupingUsed()
+    {
+        return $this->groupingUsed;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setGroupingUsed($groupingUsed)
+    {
+        $this->groupingUsed = $groupingUsed;
+
+        return $this;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getCurrencyDisplay()
+    {
+        return $this->currencyDisplay;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setCurrencyDisplay($currencyDisplay)
+    {
+        $this->currencyDisplay = $currencyDisplay;
+
+        return $this;
+    }
+}

library/intl/src/Formatter/NumberFormatterInterface.php

@@ -0,0 +1,134 @@
+<?php
+
+namespace CommerceGuys\Intl\Formatter;
+
+use CommerceGuys\Intl\Currency\CurrencyInterface;
+use CommerceGuys\Intl\NumberFormat\NumberFormatInterface;
+
+interface NumberFormatterInterface
+{
+    /* Format style constants */
+    const DECIMAL = 1;
+    const PERCENT = 2;
+    const CURRENCY = 3;
+    const CURRENCY_ACCOUNTING = 4;
+
+    /* Currency display style constants */
+    const CURRENCY_DISPLAY_SYMBOL = 1;
+    const CURRENCY_DISPLAY_CODE = 2;
+
+    /**
+     * Formats a number.
+     *
+     * Please note that the provided value should already be rounded.
+     * This formatter doesn't do any rounding of its own, and will simply
+     * truncate extra digits.
+     *
+     * @param string $value The value to format.
+     *
+     * @return string
+     */
+    public function format($value);
+
+    /**
+     * Formats a currency value.
+     *
+     * Please note that the provided value should already be rounded.
+     * This formatter doesn't do any rounding of its own, and will simply
+     * truncate extra digits.
+     *
+     * @param string            $value    The value to format.
+     * @param CurrencyInterface $currency The currency.
+     *
+     * @return string
+     */
+    public function formatCurrency($value, CurrencyInterface $currency);
+
+    /**
+     * Parses a formatted currency value.
+     *
+     * Commonly used in price input widgets where the end-user might
+     * input a value using digits and symbols common to their locale.
+     *
+     * @param string            $value    The value to parse.
+     * @param CurrencyInterface $currency The currency.
+     *
+     * @return string|false The parsed numeric value or FALSE on error.
+     */
+    public function parseCurrency($value, CurrencyInterface $currency);
+
+    /**
+     * Gets the number format.
+     *
+     * @return NumberFormatInterface
+     */
+    public function getNumberFormat();
+
+    /**
+     * Gets the minimum number of fraction digits.
+     *
+     * Defaults to 0 for decimal and percentage styles.
+     * Defaults to null for currency styles, since the currency number of
+     * fraction digits is used as the default in that case.
+     *
+     * @return int
+     */
+    public function getMinimumFractionDigits();
+
+    /**
+     * Sets the minimum number of fraction digits.
+     *
+     * @param int $minimumFractionDigits
+     */
+    public function setMinimumFractionDigits($minimumFractionDigits);
+
+    /**
+     * Gets the maximum number of fraction digits.
+     *
+     * Defaults to 3 for decimal and percentage styles.
+     * Defaults to null for currency styles, since the currency number of
+     * fraction digits is used as the default in that case.
+     *
+     * @return int
+     */
+    public function getMaximumFractionDigits();
+
+    /**
+     * Sets the maximum number of fraction digits.
+     *
+     * @param int $maximumFractionDigits
+     */
+    public function setMaximumFractionDigits($maximumFractionDigits);
+
+    /**
+     * Returns whether the major digits will be grouped.
+     *
+     * @return bool
+     */
+    public function isGroupingUsed();
+
+    /**
+     * Sets whether or not major digits should be grouped
+     *
+     * @param bool $groupingUsed
+     */
+    public function setGroupingUsed($groupingUsed);
+
+    /**
+     * Gets the currency display style.
+     *
+     * Controls whether a currency amount will be shown with the
+     * currency symbol (CURRENCY_DISPLAY_SYMBOL) or the
+     * currency code (CURRENCY_DISPLAY_CODE).
+     *
+     * @return int
+     */
+    public function getCurrencyDisplay();
+
+    /**
+     * Sets the currency display style.
+     *
+     * @param int $currencyDisplay One of the CURRENCY_DISPLAY_ constants.
+     */
+    public function setCurrencyDisplay($currencyDisplay);
+}

library/intl/src/Language/Language.php

@@ -0,0 +1,91 @@
+<?php
+
+namespace CommerceGuys\Intl\Language;
+
+class Language implements LanguageInterface
+{
+    /**
+     * The two-letter language code.
+     *
+     * @var string
+     */
+    protected $languageCode;
+
+    /**
+     * The language name.
+     *
+     * @var string
+     */
+    protected $name;
+
+    /**
+     * The language locale (i.e. "en-US").
+     *
+     * @var string
+     */
+    protected $locale;
+
+    /**
+     * Returns the string representation of the Language.
+     *
+     * @return string
+     */
+    public function __toString()
+    {
+        return $this->getLanguageCode();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getLanguageCode()
+    {
+        return $this->languageCode;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setLanguageCode($languageCode)
+    {
+        $this->languageCode = $languageCode;
+
+        return $this;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getName()
+    {
+        return $this->name;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setName($name)
+    {
+        $this->name = $name;
+
+        return $this;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getLocale()
+    {
+        return $this->locale;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setLocale($locale)
+    {
+        $this->locale = $locale;
+
+        return $this;
+    }
+}

library/intl/src/Language/LanguageInterface.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace CommerceGuys\Intl\Language;
+
+interface LanguageInterface
+{
+    /**
+     * Gets the two-letter language code.
+     *
+     * @return string
+     */
+    public function getLanguageCode();
+
+    /**
+     * Sets the two-letter language code.
+     *
+     * @param string $languageCode The two-letter language code.
+     */
+    public function setLanguageCode($languageCode);
+
+    /**
+     * Gets the language name.
+     *
+     * Note that certain locales have incomplete translations, in which
+     * case the english version of the language name is used instead.
+     *
+     * @return string
+     */
+    public function getName();
+
+    /**
+     * Sets the language name.
+     *
+     * @param string $name The language name.
+     */
+    public function setName($name);
+}

library/intl/src/Language/LanguageRepository.php

@@ -0,0 +1,96 @@
+<?php
+
+namespace CommerceGuys\Intl\Language;
+
+use CommerceGuys\Intl\LocaleResolverTrait;
+use CommerceGuys\Intl\Exception\UnknownLanguageException;
+
+/**
+ * Manages languages based on JSON definitions.
+ */
+class LanguageRepository implements LanguageRepositoryInterface
+{
+    use LocaleResolverTrait;
+
+    /**
+     * Per-locale language definitions.
+     *
+     * @var array
+     */
+    protected $definitions = array();
+
+    /**
+     * Creates a LanguageRepository instance.
+     *
+     * @param string $definitionPath The path to the currency definitions.
+     *                               Defaults to 'resources/language'.
+     */
+    public function __construct($definitionPath = null)
+    {
+        $this->definitionPath = $definitionPath ? $definitionPath : __DIR__ . '/../../resources/language/';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function get($languageCode, $locale = null, $fallbackLocale = null)
+    {
+        $locale = $this->resolveLocale($locale, $fallbackLocale);
+        $definitions = $this->loadDefinitions($locale);
+        if (!isset($definitions[$languageCode])) {
+            throw new UnknownLanguageException($languageCode);
+        }
+
+        return $this->createLanguageFromDefinition($definitions[$languageCode], $locale);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getAll($locale = null, $fallbackLocale = null)
+    {
+        $locale = $this->resolveLocale($locale, $fallbackLocale);
+        $definitions = $this->loadDefinitions($locale);
+        $languages = array();
+        foreach ($definitions as $languageCode => $definition) {
+            $languages[$languageCode] = $this->createLanguageFromDefinition($definition, $locale);
+        }
+
+        return $languages;
+    }
+
+    /**
+     * Loads the language definitions for the provided locale.
+     *
+     * @param string $locale The desired locale.
+     *
+     * @return array
+     */
+    protected function loadDefinitions($locale)
+    {
+        if (!isset($this->definitions[$locale])) {
+            $filename = $this->definitionPath . $locale . '.json';
+            $this->definitions[$locale] = json_decode(file_get_contents($filename), true);
+        }
+
+        return $this->definitions[$locale];
+    }
+
+    /**
+     * Creates a language object from the provided definition.
+     *
+     * @param array  $definition The language definition.
+     * @param string $locale     The locale of the language definition.
+     *
+     * @return Language
+     */
+    protected function createLanguageFromDefinition(array $definition, $locale)
+    {
+        $language = new Language();
+        $language->setLanguageCode($definition['code']);
+        $language->setName($definition['name']);
+        $language->setLocale($locale);
+
+        return $language;
+    }
+}

library/intl/src/Language/LanguageRepositoryInterface.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace CommerceGuys\Intl\Language;
+
+/**
+ * Language repository interface.
+ */
+interface LanguageRepositoryInterface
+{
+    /**
+     * Returns a language instance matching the provided language code.
+     *
+     * @param string $languageCode   The language code.
+     * @param string $locale         The locale (i.e. fr-FR).
+     * @param string $fallbackLocale A fallback locale (i.e "en").
+     *
+     * @return LanguageInterface
+     */
+    public function get($languageCode, $locale = null, $fallbackLocale = null);
+
+    /**
+     * Returns all available language instances.
+     *
+     * @param string $locale         The locale (i.e. fr-FR).
+     * @param string $fallbackLocale A fallback locale (i.e "en").
+     *
+     * @return array An array of language implementing the LanguageInterface,
+     *               keyed by language code.
+     */
+    public function getAll($locale = null, $fallbackLocale = null);
+}

library/intl/src/LocaleResolverTrait.php

@@ -0,0 +1,89 @@
+<?php
+
+namespace CommerceGuys\Intl;
+
+use CommerceGuys\Intl\Exception\UnknownLocaleException;
+
+trait LocaleResolverTrait
+{
+    /**
+     * The path where per-locale definitions are stored.
+     */
+    protected $definitionPath;
+
+    /**
+     * Determines which locale should be used for loading definitions.
+     *
+     * If the "bs-Cyrl-BA" locale is requested, with an "en" fallback,
+     * the system will try to find the definitions for:
+     * 1) bs-Cyrl-BA
+     * 2) bs-Cyrl
+     * 3) bs
+     * 4) en
+     * The first locale for which a definition file is found, wins.
+     * Otherwise, an exception is thrown.
+     *
+     * @param string $locale         The desired locale (i.e. fr-FR).
+     * @param string $fallbackLocale A fallback locale (i.e "en").
+     *
+     * @return string
+     *
+     * @throws UnknownLocaleException
+     */
+    protected function resolveLocale($locale = null, $fallbackLocale = null)
+    {
+        if (is_null($locale)) {
+            // Use the default locale if none was provided.
+            // @todo Provide a way to override this.
+            $locale = 'en';
+        }
+        // Normalize the locale. Allows en_US to work the same as en-US, etc.
+        $locale = str_replace('_', '-', $locale);
+        // List all possible variants (i.e. en-US gives "en-US" and "en").
+        $localeVariants = $this->getLocaleVariants($locale);
+        // A fallback locale was provided, add it to the end of the chain.
+        if (isset($fallbackLocale)) {
+            $localeVariants[] = $fallbackLocale;
+        }
+
+        // Try to resolve a locale by finding a matching definition file.
+        $resolvedLocale = null;
+        foreach ($localeVariants as $localeVariant) {
+            $path = $this->definitionPath . $localeVariant . '.json';
+            if (file_exists($path)) {
+                $resolvedLocale = $localeVariant;
+                break;
+            }
+        }
+        // No locale could be resolved, stop here.
+        if (!$resolvedLocale) {
+            throw new UnknownLocaleException($locale);
+        }
+
+        return $resolvedLocale;
+    }
+
+    /**
+     * Returns all variants of a locale.
+     *
+     * For example, "bs-Cyrl-BA" has the following variants:
+     * 1) bs-Cyrl-BA
+     * 2) bs-Cyrl
+     * 3) bs
+     *
+     * @param string $locale The locale (i.e. fr-FR).
+     *
+     * @return array An array of all variants of a locale.
+     */
+    protected function getLocaleVariants($locale)
+    {
+        $localeVariants = array();
+        $localeParts = explode('-', $locale);
+        while (!empty($localeParts)) {
+            $localeVariants[] = implode('-', $localeParts);
+            array_pop($localeParts);
+        }
+
+        return $localeVariants;
+    }
+}

library/intl/src/NumberFormat/NumberFormat.php

@@ -0,0 +1,269 @@
+<?php
+
+namespace CommerceGuys\Intl\NumberFormat;
+
+class NumberFormat implements NumberFormatInterface
+{
+    /**
+     * The locale (i.e. "en_US").
+     *
+     * @var string
+     */
+    protected $locale;
+
+    /**
+     * The numbering system.
+     *
+     * @var string
+     */
+    protected $numberingSystem = array();
+
+    /**
+     * The decimal separator.
+     *
+     * @var string
+     */
+    protected $decimalSeparator = array();
+
+    /**
+     * The grouping separator.
+     *
+     * @var string
+     */
+    protected $groupingSeparator = array();
+
+    /**
+     * The plus sign.
+     *
+     * @var string
+     */
+    protected $plusSign = array();
+
+    /**
+     * The number symbols.
+     *
+     * @var string
+     */
+    protected $minusSign = array();
+
+    /**
+     * The percent sign.
+     *
+     * @var string
+     */
+    protected $percentSign = array();
+
+    /**
+     * The number pattern used to format decimal numbers.
+     *
+     * @var string
+     */
+    protected $decimalPattern;
+
+    /**
+     * The number pattern used to format percentages.
+     *
+     * @var string
+     */
+    protected $percentPattern;
+
+    /**
+     * The number pattern used to format currency amounts.
+     *
+     * @var string
+     */
+    protected $currencyPattern;
+
+    /**
+     * The number pattern used to format accounting currency amounts.
+     *
+     * @var string
+     */
+    protected $accountingCurrencyPattern;
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getLocale()
+    {
+        return $this->locale;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setLocale($locale)
+    {
+        $this->locale = $locale;
+
+        return $this;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getNumberingSystem()
+    {
+        return $this->numberingSystem;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setNumberingSystem($numberingSystem)
+    {
+        $this->numberingSystem = $numberingSystem;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getDecimalSeparator()
+    {
+        return $this->decimalSeparator;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setDecimalSeparator($decimalSeparator)
+    {
+        $this->decimalSeparator = $decimalSeparator;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getGroupingSeparator()
+    {
+        return $this->groupingSeparator;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setGroupingSeparator($groupingSeparator)
+    {
+        $this->groupingSeparator = $groupingSeparator;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getPlusSign()
+    {
+        return $this->plusSign;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setPlusSign($plusSign)
+    {
+        $this->plusSign = $plusSign;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getMinusSign()
+    {
+        return $this->minusSign;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setMinusSign($minusSign)
+    {
+        $this->minusSign = $minusSign;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getPercentSign()
+    {
+        return $this->percentSign;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setPercentSign($percentSign)
+    {
+        $this->percentSign = $percentSign;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getDecimalPattern()
+    {
+        return $this->decimalPattern;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setDecimalPattern($decimalPattern)
+    {
+        $this->decimalPattern = $decimalPattern;
+
+        return $this;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getPercentPattern()
+    {
+        return $this->percentPattern;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setPercentPattern($percentPattern)
+    {
+        $this->percentPattern = $percentPattern;
+
+        return $this;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getCurrencyPattern()
+    {
+        return $this->currencyPattern;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setCurrencyPattern($currencyPattern)
+    {
+        $this->currencyPattern = $currencyPattern;
+
+        return $this;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getAccountingCurrencyPattern()
+    {
+        return $this->accountingCurrencyPattern;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setAccountingCurrencyPattern($accountingCurrencyPattern)
+    {
+        $this->accountingCurrencyPattern = $accountingCurrencyPattern;
+
+        return $this;
+    }
+}

library/intl/src/NumberFormat/NumberFormatInterface.php

@@ -0,0 +1,185 @@
+<?php
+
+namespace CommerceGuys\Intl\NumberFormat;
+
+interface NumberFormatInterface
+{
+    // Arabic-Indic digits.
+    const NUMBERING_SYSTEM_ARABIC = 'arab';
+    // Extended Arabic-Indic digits.
+    const NUMBERING_SYSTEM_ARABIC_EXTENDED = 'arabext';
+    // Bengali digits.
+    const NUMBERING_SYSTEM_BENGALI = 'beng';
+    // Devanagari digits.
+    const NUMBERING_SYSTEM_DEVANAGARI = 'deva';
+    // Latin digits
+    const NUMBERING_SYSTEM_LATIN = 'latn';
+
+    /**
+     * Gets the locale.
+     *
+     * @return string
+     */
+    public function getLocale();
+
+    /**
+     * Sets the locale.
+     *
+     * @param string $locale The locale (i.e. "en_US").
+     */
+    public function setLocale($locale);
+
+    /**
+     * Gets the numbering system.
+     *
+     * The value is one of the NUMBERING_SYSTEM_ constants.
+     *
+     * @return string
+     */
+    public function getNumberingSystem();
+
+    /**
+     * Sets the numbering system.
+     *
+     * @param string $numberingSystem One of the NUMBERING_SYSTEM_ constants.
+     */
+    public function setNumberingSystem($numberingSystem);
+
+    /**
+     * Gets the decimal separator.
+     *
+     * @return string
+     */
+    public function getDecimalSeparator();
+
+    /**
+     * Sets the decimal separator.
+     *
+     * @var string $decimalSeparator
+     */
+    public function setDecimalSeparator($decimalSeparator);
+
+    /**
+     * Gets the grouping separator.
+     *
+     * @return string
+     */
+    public function getGroupingSeparator();
+
+    /**
+     * Sets the grouping separator.
+     *
+     * @var string $groupingSeparator
+     */
+    public function setGroupingSeparator($groupingSeparator);
+
+    /**
+     * Gets the plus sign.
+     *
+     * @return string
+     */
+    public function getPlusSign();
+
+    /**
+     * Sets the plus sign.
+     *
+     * @var string $plusSign
+     */
+    public function setPlusSign($plusSign);
+
+    /**
+     * Gets the minus sign.
+     *
+     * @return string
+     */
+    public function getMinusSign();
+
+    /**
+     * Sets the minus sign.
+     *
+     * @var string $minusSign
+     */
+    public function setMinusSign($minusSign);
+
+    /**
+     * Gets the percent sign.
+     *
+     * @return string
+     */
+    public function getPercentSign();
+
+    /**
+     * Sets the percent sign.
+     *
+     * @var string $percentSign
+     */
+    public function setPercentSign($percentSign);
+
+    /**
+     * Gets the number pattern used to format decimal numbers.
+     *
+     * @return string
+     *
+     * @see http://cldr.unicode.org/translation/number-patterns
+     */
+    public function getDecimalPattern();
+
+    /**
+     * Sets the number pattern used to format decimal numbers.
+     *
+     * @param string $decimalPattern The decimal pattern.
+     */
+    public function setDecimalPattern($decimalPattern);
+
+    /**
+     * Gets the number pattern used to format percentages.
+     *
+     * @return string
+     *
+     * @see http://cldr.unicode.org/translation/number-patterns
+     */
+    public function getPercentPattern();
+
+    /**
+     * Sets the number pattern used to format percentages.
+     *
+     * @param string $percentPattern The percent pattern.
+     */
+    public function setPercentPattern($percentPattern);
+
+    /**
+     * Gets the number pattern used to format currency amounts.
+     *
+     * @return string
+     *
+     * @see http://cldr.unicode.org/translation/number-patterns
+     */
+    public function getCurrencyPattern();
+
+    /**
+     * Sets the number pattern used to format currency amounts.
+     *
+     * @param string $currencyPattern The currency pattern.
+     */
+    public function setCurrencyPattern($currencyPattern);
+
+    /**
+     * Gets the number pattern used to format accounting currency amounts.
+     *
+     * Most commonly used when formatting amounts on invoices.
+     *
+     * @return string
+     *
+     * @see http://cldr.unicode.org/translation/number-patterns
+     */
+    public function getAccountingCurrencyPattern();
+
+    /**
+     * Sets the number pattern used to format accounting currency amounts.
+     *
+     * Most commonly used when formatting amounts on invoices.
+     *
+     * @param string $accountingCurrencyPattern The accounting currency pattern.
+     */
+    public function setAccountingCurrencyPattern($accountingCurrencyPattern);
+}

library/intl/src/NumberFormat/NumberFormatRepository.php

@@ -0,0 +1,87 @@
+<?php
+
+namespace CommerceGuys\Intl\NumberFormat;
+
+use CommerceGuys\Intl\LocaleResolverTrait;
+
+/**
+ * Repository for number formats based on JSON definitions.
+ */
+class NumberFormatRepository implements NumberFormatRepositoryInterface
+{
+    use LocaleResolverTrait;
+
+    /**
+     * Number format definitions.
+     *
+     * @var array
+     */
+    protected $definitions = array();
+
+    /**
+     * Creates a NumberFormatRepository instance.
+     *
+     * @param string $definitionPath The path to the number format definitions.
+     *                               Defaults to 'resources/number_format'.
+     */
+    public function __construct($definitionPath = null)
+    {
+        $this->definitionPath = $definitionPath ? $definitionPath : __DIR__ . '/../../resources/number_format/';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function get($locale, $fallbackLocale = null)
+    {
+        $locale = $this->resolveLocale($locale, $fallbackLocale);
+        if (!isset($this->definitions[$locale])) {
+            $filename = $this->definitionPath . $locale . '.json';
+            $this->definitions[$locale] = json_decode(file_get_contents($filename), true);
+        }
+
+        return $this->createNumberFormatFromDefinition($this->definitions[$locale], $locale);
+    }
+
+    /**
+     * Creates a number format object from the provided definition.
+     *
+     * @param array  $definition The number format definition.
+     * @param string $locale     The locale of the number format definition.
+     *
+     * @return NumberFormat
+     */
+    protected function createNumberFormatFromDefinition(array $definition, $locale)
+    {
+        if (!isset($definition['decimal_separator'])) {
+            $definition['decimal_separator'] = '.';
+        }
+        if (!isset($definition['grouping_separator'])) {
+            $definition['grouping_separator'] = ',';
+        }
+        if (!isset($definition['plus_sign'])) {
+            $definition['plus_sign'] = '+';
+        }
+        if (!isset($definition['minus_sign'])) {
+            $definition['minus_sign'] = '-';
+        }
+        if (!isset($definition['percent_sign'])) {
+            $definition['percent_sign'] = '%';
+        }
+
+        $numberFormat = new NumberFormat();
+        $numberFormat->setLocale($locale);
+        $numberFormat->setNumberingSystem($definition['numbering_system']);
+        $numberFormat->setDecimalSeparator($definition['decimal_separator']);
+        $numberFormat->setGroupingSeparator($definition['grouping_separator']);
+        $numberFormat->setPlusSign($definition['plus_sign']);
+        $numberFormat->setMinusSign($definition['minus_sign']);
+        $numberFormat->setPercentSign($definition['percent_sign']);
+        $numberFormat->setDecimalPattern($definition['decimal_pattern']);
+        $numberFormat->setPercentPattern($definition['percent_pattern']);
+        $numberFormat->setCurrencyPattern($definition['currency_pattern']);
+        $numberFormat->setAccountingCurrencyPattern($definition['accounting_currency_pattern']);
+
+        return $numberFormat;
+    }
+}

library/intl/src/NumberFormat/NumberFormatRepositoryInterface.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace CommerceGuys\Intl\NumberFormat;
+
+/**
+ * Number format repository interface.
+ */
+interface NumberFormatRepositoryInterface
+{
+    /**
+     * Returns a number format instance for the provided locale.
+     *
+     * @param string $locale         The locale (i.e. fr-FR).
+     * @param string $fallbackLocale A fallback locale (i.e "en").
+     *
+     * @return NumberFormatInterface
+     */
+    public function get($locale, $fallbackLocale = null);
+}