README

Part of the h4kuna PHP libraries, see the overview of all packages.

This library is an extension of the Nette Framework for h4kuna/exchange.

Installation

Simply via composer, requires PHP 8.2 or newer.

composer require h4kuna/exchange-nette

Optional dependencies:

composer require guzzlehttp/guzzle malkusch/lock nette/application nette/caching

guzzlehttp/guzzle is the default HTTP client and request factory, if no other is registered in the container.
malkusch/lock and nette/caching are required by the default cache.
nette/application is needed to initialize ExchangeManager automatically on each presenter, see Request.

Registration

The first step is to register the extension.

extensions:
    exchangeExtension: h4kuna\Exchange\DI\ExchangeExtension

The extension is ready to use, the other configuration is optional. By default, three currencies are defined: CZK, EUR and USD. The first currency (CZK by default) is the default currency of Exchange. Currencies have a default format provided by h4kuna/number-format, where you can find the documentation.

Configuration

For the format options of a currency, read h4kuna/number-format. Currencies defined in your configuration are merged with the default ones, use currencies!: if you want to replace them.

exchangeExtension:
    currencies:
        czk: # upper / lower case of the currency code does not matter
            decimals: 3
            decimalPoint: '.'
            thousandsSeparator: ','
            zeroIsEmpty: true
            emptyValue: '-'
            zeroClear: h4kuna\Format\Number\Parameters\ZeroClear::DECIMALS
            mask: '1 ⎵' # ⎵ is the placeholder for the unit
            showUnitIfEmpty: false
            nbsp: true
            unit: Kč
            round: h4kuna\Format\Number\Round::BY_CEIL

        usd:
            unit: '$'
        gbp: [] # use the default format
    driver: h4kuna\Exchange\Driver\Cnb\Day # class implementing h4kuna\Exchange\Driver\Source, default is Cnb\Day
    session: false # also save the selected currency to the session, by default only to the cookie
    vat: 21 # VAT in percent
    strict: true # enabled by default, download only the defined currencies, e.g. ['CZK', 'EUR', 'USD']
    defaultFormat: [] # format of a currency that has no format defined, the value is an array like "currencies.czk" above
    managerParameter: 'currency' # name of the parameter for the query, cookie and session
    tempDir: %tempDir% # temporary directory for the cache
    filters: # the extension defines four filters for Latte, you can rename them
        currency: currency
        currencyTo: currencyTo
        vat: vat
        vatTo: vatTo

Latte

Now we have four new filters.

{=100|currency}            {* format in the default currency, optional arguments: from, to *}
{=100|vat}                 {* add VAT and format, optional arguments: from, to *}
{=100|currencyTo:'EUR'}    {* convert from the default currency to EUR and format *}
{=100|vatTo:'EUR'}         {* add VAT, convert to EUR and format *}

Request

If nette/application and the http and session extensions are registered, ExchangeManager is initialized for every presenter. It reads the currency code from the query parameter, the cookie or the session (in this order), checks that the currency exists and saves it to the cookie (and to the session if session: true). When the code comes from the query, the onChangeCurrency($presenter, $code) event is triggered.

/?currency=USD

h4kuna / exchange-nette

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