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<?php
namespace Collective\Html;
use DateTime;
use Illuminate\Contracts\Routing\UrlGenerator;
use Illuminate\Session\SessionInterface;
use Illuminate\Support\Collection;
use Illuminate\Support\Traits\Macroable;
class FormBuilder
{
use Macroable;
/**
* The HTML builder instance.
*
* @var \Collective\Html\HtmlBuilder
*/
protected $html;
/**
* The URL generator instance.
*
* @var \Illuminate\Contracts\Routing\UrlGenerator
*/
protected $url;
/**
* The CSRF token used by the form builder.
*
* @var string
*/
protected $csrfToken;
/**
* The session store implementation.
*
* @var \Illuminate\Session\SessionInterface
*/
protected $session;
/**
* The current model instance for the form.
*
* @var mixed
*/
protected $model;
/**
* An array of label names we've created.
*
* @var array
*/
protected $labels = [];
/**
* The reserved form open attributes.
*
* @var array
*/
protected $reserved = ['method', 'url', 'route', 'action', 'files'];
/**
* The form methods that should be spoofed, in uppercase.
*
* @var array
*/
protected $spoofedMethods = ['DELETE', 'PATCH', 'PUT'];
/**
* The types of inputs to not fill values on by default.
*
* @var array
*/
protected $skipValueTypes = ['file', 'password', 'checkbox', 'radio'];
/**
* Create a new form builder instance.
*
* @param \Illuminate\Contracts\Routing\UrlGenerator $url
* @param \Collective\Html\HtmlBuilder $html
* @param string $csrfToken
*
* @return void
*/
public function __construct(HtmlBuilder $html, UrlGenerator $url, $csrfToken)
{
$this->url = $url;
$this->html = $html;
$this->csrfToken = $csrfToken;
}
/**
* Open up a new HTML form.
*
* @param array $options
*
* @return string
*/
public function open(array $options = [])
{
$method = array_get($options, 'method', 'post');
// We need to extract the proper method from the attributes. If the method is
// something other than GET or POST we'll use POST since we will spoof the
// actual method since forms don't support the reserved methods in HTML.
$attributes['method'] = $this->getMethod($method);
$attributes['action'] = $this->getAction($options);
$attributes['accept-charset'] = 'UTF-8';
// If the method is PUT, PATCH or DELETE we will need to add a spoofer hidden
// field that will instruct the Symfony request to pretend the method is a
// different method than it actually is, for convenience from the forms.
$append = $this->getAppendage($method);
if (isset($options['files']) && $options['files']) {
$options['enctype'] = 'multipart/form-data';
}
// Finally we're ready to create the final form HTML field. We will attribute
// format the array of attributes. We will also add on the appendage which
// is used to spoof requests for this PUT, PATCH, etc. methods on forms.
$attributes = array_merge(
$attributes, array_except($options, $this->reserved)
);
// Finally, we will concatenate all of the attributes into a single string so
// we can build out the final form open statement. We'll also append on an
// extra value for the hidden _method field if it's needed for the form.
$attributes = $this->html->attributes($attributes);
return '<form'.$attributes.'>'.$append;
}
/**
* Create a new model based form builder.
*
* @param mixed $model
* @param array $options
*
* @return string
*/
public function model($model, array $options = [])
{
$this->model = $model;
return $this->open($options);
}
/**
* Set the model instance on the form builder.
*
* @param mixed $model
*
* @return void
*/
public function setModel($model)
{
$this->model = $model;
}
/**
* Close the current form.
*
* @return string
*/
public function close()
{
$this->labels = [];
$this->model = null;
return '</form>';
}
/**
* Generate a hidden field with the current CSRF token.
*
* @return string
*/
public function token()
{
$token = !empty($this->csrfToken) ? $this->csrfToken : $this->session->getToken();
return $this->hidden('_token', $token);
}
/**
* Create a form label element.
*
* @param string $name
* @param string $value
* @param array $options
*
* @return string
*/
public function label($name, $value = null, $options = [])
{
$this->labels[] = $name;
$options = $this->html->attributes($options);
$value = e($this->formatLabel($name, $value));
return '<label for="'.$name.'"'.$options.'>'.$value.'</label>';
}
/**
* Format the label value.
*
* @param string $name
* @param string|null $value
*
* @return string
*/
protected function formatLabel($name, $value)
{
return $value ?: ucwords(str_replace('_', ' ', $name));
}
/**
* Create a form input field.
*
* @param string $type
* @param string $name
* @param string $value
* @param array $options
*
* @return string
*/
public function input($type, $name, $value = null, $options = [])
{
if (!isset($options['name'])) {
$options['name'] = $name;
}
// We will get the appropriate value for the given field. We will look for the
// value in the session for the value in the old input data then we'll look
// in the model instance if one is set. Otherwise we will just use empty.
$id = $this->getIdAttribute($name, $options);
if (!in_array($type, $this->skipValueTypes)) {
$value = $this->getValueAttribute($name, $value);
}
// Once we have the type, value, and ID we can merge them into the rest of the
// attributes array so we can convert them into their HTML attribute format
// when creating the HTML element. Then, we will return the entire input.
$merge = compact('type', 'value', 'id');
$options = array_merge($options, $merge);
return '<input'.$this->html->attributes($options).'>';
}
/**
* Create a text input field.
*
* @param string $name
* @param string $value
* @param array $options
*
* @return string
*/
public function text($name, $value = null, $options = [])
{
return $this->input('text', $name, $value, $options);
}
/**
* Create a password input field.
*
* @param string $name
* @param array $options
*
* @return string
*/
public function password($name, $options = [])
{
return $this->input('password', $name, '', $options);
}
/**
* Create a hidden input field.
*
* @param string $name
* @param string $value
* @param array $options
*
* @return string
*/
public function hidden($name, $value = null, $options = [])
{
return $this->input('hidden', $name, $value, $options);
}
/**
* Create an e-mail input field.
*
* @param string $name
* @param string $value
* @param array $options
*
* @return string
*/
public function email($name, $value = null, $options = [])
{
return $this->input('email', $name, $value, $options);
}
/**
* Create a tel input field.
*
* @param string $name
* @param string $value
* @param array $options
*
* @return string
*/
public function tel($name, $value = null, $options = [])
{
return $this->input('tel', $name, $value, $options);
}
/**
* Create a number input field.
*
* @param string $name
* @param string $value
* @param array $options
*
* @return string
*/
public function number($name, $value = null, $options = [])
{
return $this->input('number', $name, $value, $options);
}
/**
* Create a date input field.
*
* @param string $name
* @param string $value
* @param array $options
*
* @return string
*/
public function date($name, $value = null, $options = [])
{
if ($value instanceof DateTime) {
$value = $value->format('Y-m-d');
}
return $this->input('date', $name, $value, $options);
}
/**
* Create a datetime input field.
*
* @param string $name
* @param string $value
* @param array $options
*
* @return string
*/
public function datetime($name, $value = null, $options = [])
{
if ($value instanceof DateTime) {
$value = $value->format(DateTime::RFC3339);
}
return $this->input('datetime', $name, $value, $options);
}
/**
* Create a datetime-local input field.
*
* @param string $name
* @param string $value
* @param array $options
*
* @return string
*/
public function datetimeLocal($name, $value = null, $options = [])
{
if ($value instanceof DateTime) {
$value = $value->format('Y-m-d\TH:i');
}
return $this->input('datetime-local', $name, $value, $options);
}
/**
* Create a time input field.
*
* @param string $name
* @param string $value
* @param array $options
*
* @return string
*/
public function time($name, $value = null, $options = [])
{
return $this->input('time', $name, $value, $options);
}
/**
* Create a url input field.
*
* @param string $name
* @param string $value
* @param array $options
*
* @return string
*/
public function url($name, $value = null, $options = [])
{
return $this->input('url', $name, $value, $options);
}
/**
* Create a file input field.
*
* @param string $name
* @param array $options
*
* @return string
*/
public function file($name, $options = [])
{
return $this->input('file', $name, null, $options);
}
/**
* Create a textarea input field.
*
* @param string $name
* @param string $value
* @param array $options
*
* @return string
*/
public function textarea($name, $value = null, $options = [])
{
if (!isset($options['name'])) {
$options['name'] = $name;
}
// Next we will look for the rows and cols attributes, as each of these are put
// on the textarea element definition. If they are not present, we will just
// assume some sane default values for these attributes for the developer.
$options = $this->setTextAreaSize($options);
$options['id'] = $this->getIdAttribute($name, $options);
$value = (string) $this->getValueAttribute($name, $value);
unset($options['size']);
// Next we will convert the attributes into a string form. Also we have removed
// the size attribute, as it was merely a short-cut for the rows and cols on
// the element. Then we'll create the final textarea elements HTML for us.
$options = $this->html->attributes($options);
return '<textarea'.$options.'>'.e($value).'</textarea>';
}
/**
* Set the text area size on the attributes.
*
* @param array $options
*
* @return array
*/
protected function setTextAreaSize($options)
{
if (isset($options['size'])) {
return $this->setQuickTextAreaSize($options);
}
// If the "size" attribute was not specified, we will just look for the regular
// columns and rows attributes, using sane defaults if these do not exist on
// the attributes array. We'll then return this entire options array back.
$cols = array_get($options, 'cols', 50);
$rows = array_get($options, 'rows', 10);
return array_merge($options, compact('cols', 'rows'));
}
/**
* Set the text area size using the quick "size" attribute.
*
* @param array $options
*
* @return array
*/
protected function setQuickTextAreaSize($options)
{
$segments = explode('x', $options['size']);
return array_merge($options, ['cols' => $segments[0], 'rows' => $segments[1]]);
}
/**
* Create a select box field.
*
* @param string $name
* @param array $list
* @param string $selected
* @param array $options
*
* @return string
*/
public function select($name, $list = [], $selected = null, $options = [])
{
// When building a select box the "value" attribute is really the selected one
// so we will use that when checking the model or session for a value which
// should provide a convenient method of re-populating the forms on post.
$selected = $this->getValueAttribute($name, $selected);
$options['id'] = $this->getIdAttribute($name, $options);
if (!isset($options['name'])) {
$options['name'] = $name;
}
// We will simply loop through the options and build an HTML value for each of
// them until we have an array of HTML declarations. Then we will join them
// all together into one single HTML element that can be put on the form.
$html = [];
if (isset($options['placeholder'])) {
$html[] = $this->placeholderOption($options['placeholder'], $selected);
unset($options['placeholder']);
}
foreach ($list as $value => $display) {
$html[] = $this->getSelectOption($display, $value, $selected);
}
// Once we have all of this HTML, we can join this into a single element after
// formatting the attributes into an HTML "attributes" string, then we will
// build out a final select statement, which will contain all the values.
$options = $this->html->attributes($options);
$list = implode('', $html);
return "<select{$options}>{$list}</select>";
}
/**
* Create a select range field.
*
* @param string $name
* @param string $begin
* @param string $end
* @param string $selected
* @param array $options
*
* @return string
*/
public function selectRange($name, $begin, $end, $selected = null, $options = [])
{
$range = array_combine($range = range($begin, $end), $range);
return $this->select($name, $range, $selected, $options);
}
/**
* Create a select year field.
*
* @param string $name
* @param string $begin
* @param string $end
* @param string $selected
* @param array $options
*
* @return string
*/
public function selectYear()
{
return call_user_func_array([$this, 'selectRange'], func_get_args());
}
/**
* Create a select month field.
*
* @param string $name
* @param string $selected
* @param array $options
* @param string $format
*
* @return string
*/
public function selectMonth($name, $selected = null, $options = [], $format = '%B')
{
$months = [];
foreach (range(1, 12) as $month) {
$months[$month] = strftime($format, mktime(0, 0, 0, $month, 1));
}
return $this->select($name, $months, $selected, $options);
}
/**
* Get the select option for the given value.
*
* @param string $display
* @param string $value
* @param string $selected
*
* @return string
*/
public function getSelectOption($display, $value, $selected)
{
if (is_array($display)) {
return $this->optionGroup($display, $value, $selected);
}
return $this->option($display, $value, $selected);
}
/**
* Create an option group form element.
*
* @param array $list
* @param string $label
* @param string $selected
*
* @return string
*/
protected function optionGroup($list, $label, $selected)
{
$html = [];
foreach ($list as $value => $display) {
$html[] = $this->option($display, $value, $selected);
}
return '<optgroup label="'.e($label).'">'.implode('', $html).'</optgroup>';
}
/**
* Create a select element option.
*
* @param string $display
* @param string $value
* @param string $selected
*
* @return string
*/
protected function option($display, $value, $selected)
{
$selected = $this->getSelectedValue($value, $selected);
$options = ['value' => $value, 'selected' => $selected];
return '<option'.$this->html->attributes($options).'>'.e($display).'</option>';
}
/**
* Create a placeholder select element option.
*
* @param $display
* @param $selected
*
* @return string
*/
protected function placeholderOption($display, $selected)
{
$selected = $this->getSelectedValue(null, $selected);
$options = compact('selected');
$options['value'] = '';
return '<option'.$this->html->attributes($options).'>'.e($display).'</option>';
}
/**
* Determine if the value is selected.
*
* @param string $value
* @param string $selected
*
* @return string|null
*/
protected function getSelectedValue($value, $selected)
{
if (is_array($selected)) {
return in_array($value, $selected) ? 'selected' : null;
}
return ((string) $value == (string) $selected) ? 'selected' : null;
}
/**
* Create a checkbox input field.
*
* @param string $name
* @param mixed $value
* @param bool $checked
* @param array $options
*
* @return string
*/
public function checkbox($name, $value = 1, $checked = null, $options = [])
{
return $this->checkable('checkbox', $name, $value, $checked, $options);
}
/**
* Create a radio button input field.
*
* @param string $name
* @param mixed $value
* @param bool $checked
* @param array $options
*
* @return string
*/
public function radio($name, $value = null, $checked = null, $options = [])
{
if (is_null($value)) {
$value = $name;
}
return $this->checkable('radio', $name, $value, $checked, $options);
}
/**
* Create a checkable input field.
*
* @param string $type
* @param string $name
* @param mixed $value
* @param bool $checked
* @param array $options
*
* @return string
*/
protected function checkable($type, $name, $value, $checked, $options)
{
$checked = $this->getCheckedState($type, $name, $value, $checked);
if ($checked) {
$options['checked'] = 'checked';
}
return $this->input($type, $name, $value, $options);
}
/**
* Get the check state for a checkable input.
*
* @param string $type
* @param string $name
* @param mixed $value
* @param bool $checked
*
* @return bool
*/
protected function getCheckedState($type, $name, $value, $checked)
{
switch ($type) {
case 'checkbox':
return $this->getCheckboxCheckedState($name, $value, $checked);
case 'radio':
return $this->getRadioCheckedState($name, $value, $checked);
default:
return $this->getValueAttribute($name) == $value;
}
}
/**
* Get the check state for a checkbox input.
*
* @param string $name
* @param mixed $value
* @param bool $checked
*
* @return bool
*/
protected function getCheckboxCheckedState($name, $value, $checked)
{
if (isset($this->session) && !$this->oldInputIsEmpty() && is_null($this->old($name))) {
return false;
}
if ($this->missingOldAndModel($name)) {
return $checked;
}
$posted = $this->getValueAttribute($name, $checked);
if (is_array($posted)) {
return in_array($value, $posted);
} elseif ($posted instanceof Collection) {
return $posted->contains('id', $value);
} else {
return (bool) $posted;
}
}
/**
* Get the check state for a radio input.
*
* @param string $name
* @param mixed $value
* @param bool $checked
*
* @return bool
*/
protected function getRadioCheckedState($name, $value, $checked)
{
if ($this->missingOldAndModel($name)) {
return $checked;
}
return $this->getValueAttribute($name) == $value;
}
/**
* Determine if old input or model input exists for a key.
*
* @param string $name
*
* @return bool
*/
protected function missingOldAndModel($name)
{
return (is_null($this->old($name)) && is_null($this->getModelValueAttribute($name)));
}
/**
* Create a HTML reset input element.
*
* @param string $value
* @param array $attributes
*
* @return string
*/
public function reset($value, $attributes = [])
{
return $this->input('reset', null, $value, $attributes);
}
/**
* Create a HTML image input element.
*
* @param string $url
* @param string $name
* @param array $attributes
*
* @return string
*/
public function image($url, $name = null, $attributes = [])
{
$attributes['src'] = $this->url->asset($url);
return $this->input('image', $name, null, $attributes);
}
/**
* Create a color input field.
*
* @param string $name
* @param string $value
* @param array $options
*
* @return string
*/
public function color($name, $value = null, $options = [])
{
return $this->input('color', $name, $value, $options);
}
/**
* Create a submit button element.
*
* @param string $value
* @param array $options
*
* @return string
*/
public function submit($value = null, $options = [])
{
return $this->input('submit', null, $value, $options);
}
/**
* Create a button element.
*
* @param string $value
* @param array $options
*
* @return string
*/
public function button($value = null, $options = [])
{
if (!array_key_exists('type', $options)) {
$options['type'] = 'button';
}
return '<button'.$this->html->attributes($options).'>'.$value.'</button>';
}
/**
* Parse the form action method.
*
* @param string $method
*
* @return string
*/
protected function getMethod($method)
{
$method = strtoupper($method);
return $method != 'GET' ? 'POST' : $method;
}
/**
* Get the form action from the options.
*
* @param array $options
*
* @return string
*/
protected function getAction(array $options)
{
// We will also check for a "route" or "action" parameter on the array so that
// developers can easily specify a route or controller action when creating
// a form providing a convenient interface for creating the form actions.
if (isset($options['url'])) {
return $this->getUrlAction($options['url']);
}
if (isset($options['route'])) {
return $this->getRouteAction($options['route']);
}
// If an action is available, we are attempting to open a form to a controller
// action route. So, we will use the URL generator to get the path to these
// actions and return them from the method. Otherwise, we'll use current.
elseif (isset($options['action'])) {
return $this->getControllerAction($options['action']);
}
return $this->url->current();
}
/**
* Get the action for a "url" option.
*
* @param array|string $options
*
* @return string
*/
protected function getUrlAction($options)
{
if (is_array($options)) {
return $this->url->to($options[0], array_slice($options, 1));
}
return $this->url->to($options);
}
/**
* Get the action for a "route" option.
*
* @param array|string $options
*
* @return string
*/
protected function getRouteAction($options)
{
if (is_array($options)) {
return $this->url->route($options[0], array_slice($options, 1));
}
return $this->url->route($options);
}
/**
* Get the action for an "action" option.
*
* @param array|string $options
*
* @return string
*/
protected function getControllerAction($options)
{
if (is_array($options)) {
return $this->url->action($options[0], array_slice($options, 1));
}
return $this->url->action($options);
}
/**
* Get the form appendage for the given method.
*
* @param string $method
*
* @return string
*/
protected function getAppendage($method)
{
list($method, $appendage) = [strtoupper($method), ''];
// If the HTTP method is in this list of spoofed methods, we will attach the
// method spoofer hidden input to the form. This allows us to use regular
// form to initiate PUT and DELETE requests in addition to the typical.
if (in_array($method, $this->spoofedMethods)) {
$appendage .= $this->hidden('_method', $method);
}
// If the method is something other than GET we will go ahead and attach the
// CSRF token to the form, as this can't hurt and is convenient to simply
// always have available on every form the developers creates for them.
if ($method != 'GET') {
$appendage .= $this->token();
}
return $appendage;
}
/**
* Get the ID attribute for a field name.
*
* @param string $name
* @param array $attributes
*
* @return string
*/
public function getIdAttribute($name, $attributes)
{
if (array_key_exists('id', $attributes)) {
return $attributes['id'];
}
if (in_array($name, $this->labels)) {
return $name;
}
}
/**
* Get the value that should be assigned to the field.
*
* @param string $name
* @param string $value
*
* @return mixed
*/
public function getValueAttribute($name, $value = null)
{
if (is_null($name)) {
return $value;
}
if (!is_null($this->old($name))) {
return $this->old($name);
}
if (!is_null($value)) {
return $value;
}
if (isset($this->model)) {
return $this->getModelValueAttribute($name);
}
}
/**
* Get the model value that should be assigned to the field.
*
* @param string $name
*
* @return mixed
*/
protected function getModelValueAttribute($name)
{
return data_get($this->model, $this->transformKey($name));
}
/**
* Get a value from the session's old input.
*
* @param string $name
*
* @return mixed
*/
public function old($name)
{
if (isset($this->session)) {
return $this->session->getOldInput($this->transformKey($name));
}
}
/**
* Determine if the old input is empty.
*
* @return bool
*/
public function oldInputIsEmpty()
{
return (isset($this->session) && count($this->session->getOldInput()) == 0);
}
/**
* Transform key from array to dot syntax.
*
* @param string $key
*
* @return string
*/
protected function transformKey($key)
{
return str_replace(['.', '[]', '[', ']'], ['_', '', '.', ''], $key);
}
/**
* Get the session store implementation.
*
* @return \Illuminate\Session\SessionInterface $session
*/
public function getSessionStore()
{
return $this->session;
}
/**
* Set the session store implementation.
*
* @param \Illuminate\Session\SessionInterface $session
*
* @return $this
*/
public function setSessionStore(SessionInterface $session)
{
$this->session = $session;
return $this;
}
}