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<?php
namespace ipl\Web\Control\SearchBar;
use Countable;
use Generator;
use ipl\Html\Attributes;
use ipl\Html\BaseHtmlElement;
use ipl\Html\FormattedString;
use ipl\Html\FormElement\ButtonElement;
use ipl\Html\FormElement\InputElement;
use ipl\Html\HtmlElement;
use ipl\Html\Text;
use ipl\Stdlib\Contract\Paginatable;
use ipl\Stdlib\Filter;
use ipl\Web\Control\SearchEditor;
use ipl\Web\Filter\QueryString;
use IteratorIterator;
use LimitIterator;
use OuterIterator;
use Psr\Http\Message\ServerRequestInterface;
use Traversable;
use function ipl\I18n\t;
abstract class Suggestions extends BaseHtmlElement
{
const DEFAULT_LIMIT = 50;
const SUGGESTION_TITLE_CLASS = 'suggestion-title';
protected $tag = 'ul';
/** @var string */
protected $searchTerm;
/** @var Traversable */
protected $data;
/** @var array */
protected $default;
/** @var string */
protected $type;
/** @var string */
protected $failureMessage;
public function setSearchTerm($term)
{
$this->searchTerm = $term;
return $this;
}
public function setData($data)
{
$this->data = $data;
return $this;
}
public function setDefault($default)
{
$this->default = $default;
return $this;
}
public function setType($type)
{
$this->type = $type;
return $this;
}
public function setFailureMessage($message)
{
$this->failureMessage = $message;
return $this;
}
/**
* Return whether the relation should be shown for the given column
*
* @param string $column
*
* @return bool
*/
protected function shouldShowRelationFor(string $column): bool
{
return false;
}
/**
* Create a filter to provide as default for column suggestions
*
* @param string $searchTerm
*
* @return Filter\Rule
*/
abstract protected function createQuickSearchFilter($searchTerm);
/**
* Fetch value suggestions for a particular column
*
* @param string $column
* @param string $searchTerm
* @param Filter\Chain $searchFilter
*
* @return Traversable
*/
abstract protected function fetchValueSuggestions($column, $searchTerm, Filter\Chain $searchFilter);
/**
* Fetch column suggestions
*
* @param string $searchTerm
*
* @return Traversable
*/
abstract protected function fetchColumnSuggestions($searchTerm);
protected function filterToTerms(Filter\Chain $filter)
{
$logicalSep = [
'label' => QueryString::getRuleSymbol($filter),
'search' => QueryString::getRuleSymbol($filter),
'class' => 'logical_operator',
'type' => 'logical_operator'
];
$terms = [];
foreach ($filter as $child) {
if ($child instanceof Filter\Chain) {
$terms[] = [
'search' => '(',
'label' => '(',
'type' => 'grouping_operator',
'class' => 'grouping_operator_open'
];
$terms = array_merge($terms, $this->filterToTerms($child));
$terms[] = [
'search' => ')',
'label' => ')',
'type' => 'grouping_operator',
'class' => 'grouping_operator_close'
];
} else {
/** @var Filter\Condition $child */
$terms[] = [
'search' => $child->getColumn(),
'label' => $child->metaData()->get('columnLabel'),
'type' => 'column'
];
$terms[] = [
'search' => QueryString::getRuleSymbol($child),
'label' => QueryString::getRuleSymbol($child),
'type' => 'operator'
];
$terms[] = [
'search' => $child->getValue(),
'label' => $child->getValue(),
'type' => 'value'
];
}
$terms[] = $logicalSep;
}
array_pop($terms);
return $terms;
}
protected function assembleDefault()
{
if ($this->default === null) {
return;
}
$attributes = [
'type' => 'button',
'tabindex' => -1,
'data-label' => $this->default['search'],
'value' => $this->default['search']
];
if (isset($this->default['type'])) {
$attributes['data-type'] = $this->default['type'];
} elseif ($this->type !== null) {
$attributes['data-type'] = $this->type;
}
$button = new ButtonElement(null, $attributes);
if (isset($this->default['type']) && $this->default['type'] === 'terms') {
$terms = $this->filterToTerms($this->default['terms']);
$list = new HtmlElement('ul', Attributes::create(['class' => 'comma-separated']));
foreach ($terms as $data) {
if ($data['type'] === 'column') {
$list->addHtml(new HtmlElement(
'li',
null,
new HtmlElement('em', null, Text::create($data['label']))
));
}
}
$button->setAttribute('data-terms', json_encode($terms));
$button->addHtml(FormattedString::create(
t('Search for %s in: %s'),
new HtmlElement('em', null, Text::create($this->default['search'])),
$list
));
} else {
$button->addHtml(FormattedString::create(
t('Search for %s'),
new HtmlElement('em', null, Text::create($this->default['search']))
));
}
$this->prependHtml(new HtmlElement('li', Attributes::create(['class' => 'default']), $button));
}
protected function assemble()
{
if ($this->failureMessage !== null) {
$this->addHtml(new HtmlElement(
'li',
Attributes::create(['class' => 'failure-message']),
new HtmlElement('em', null, Text::create(t('Can\'t search:'))),
Text::create($this->failureMessage)
));
return;
}
if ($this->data === null) {
$data = [];
} elseif ($this->data instanceof Paginatable) {
$this->data->limit(self::DEFAULT_LIMIT);
$data = $this->data;
} else {
$data = new LimitIterator(new IteratorIterator($this->data), 0, self::DEFAULT_LIMIT);
}
foreach ($data as $term => $meta) {
if (is_int($term)) {
$term = $meta;
}
$attributes = [
'type' => 'button',
'tabindex' => -1,
'data-search' => $term,
'data-title' => $term
];
if ($this->type !== null) {
$attributes['data-type'] = $this->type;
}
if (is_array($meta)) {
foreach ($meta as $key => $value) {
if ($key === 'label') {
$label = $value;
}
$attributes['data-' . $key] = $value;
}
} else {
$label = $meta;
$attributes['data-label'] = $meta;
}
$button = (new ButtonElement(null, $attributes))
->setAttribute('value', $label)
->addHtml(Text::create($label));
if ($this->type === 'column' && $this->shouldShowRelationFor($term)) {
$relationPath = substr($term, 0, strrpos($term, '.'));
$button->getAttributes()->add('class', 'has-details');
$button->addHtml(new HtmlElement(
'span',
Attributes::create(['class' => 'relation-path']),
Text::create($relationPath)
));
}
$this->addHtml(new HtmlElement('li', null, $button));
}
if ($this->hasMore($data, self::DEFAULT_LIMIT)) {
$this->getAttributes()->add('class', 'has-more');
}
$showDefault = true;
if ($this->searchTerm && $this->count() === 1) {
// The default option is only shown if the user's input does not result in an exact match
$input = $this->getFirst('li')->getFirst('button');
$showDefault = $input->getContent() != $this->searchTerm
&& $input->getAttributes()->get('data-search')->getValue() != $this->searchTerm;
}
if ($this->type === 'column' && ! $this->isEmpty() && ! $this->getFirst('li')->getAttributes()->has('class')) {
// The column title is only added if there are any suggestions and the first item is not a title already
$this->prependHtml(new HtmlElement(
'li',
Attributes::create(['class' => static::SUGGESTION_TITLE_CLASS]),
Text::create(t('Columns'))
));
}
if ($showDefault) {
$this->assembleDefault();
}
if (! $this->searchTerm && $this->isEmpty()) {
$this->addHtml(new HtmlElement(
'li',
Attributes::create(['class' => 'nothing-to-suggest']),
new HtmlElement('em', null, Text::create(t('Nothing to suggest')))
));
}
}
/**
* Load suggestions as requested by the client
*
* @param ServerRequestInterface $request
*
* @return $this
*/
public function forRequest(ServerRequestInterface $request)
{
if ($request->getMethod() !== 'POST') {
return $this;
}
$requestData = json_decode($request->getBody()->read(8192), true);
if (empty($requestData)) {
return $this;
}
$search = $requestData['term']['search'];
$label = $requestData['term']['label'];
$type = $requestData['term']['type'];
$this->setSearchTerm($search);
$this->setType($type);
switch ($type) {
case 'value':
if (! $requestData['column'] || $requestData['column'] === SearchEditor::FAKE_COLUMN) {
$this->setFailureMessage(t('Missing column name'));
break;
}
$searchFilter = QueryString::parse(
isset($requestData['searchFilter'])
? $requestData['searchFilter']
: ''
);
if ($searchFilter instanceof Filter\Condition) {
$searchFilter = Filter::all($searchFilter);
}
try {
$this->setData($this->fetchValueSuggestions($requestData['column'], $label, $searchFilter));
} catch (SearchException $e) {
$this->setFailureMessage($e->getMessage());
}
if ($search) {
$this->setDefault(['search' => $label]);
}
break;
case 'column':
$this->setData($this->filterColumnSuggestions($this->fetchColumnSuggestions($label), $label));
if ($search && isset($requestData['showQuickSearch']) && $requestData['showQuickSearch']) {
$quickFilter = $this->createQuickSearchFilter($label);
if (! $quickFilter instanceof Filter\Chain || ! $quickFilter->isEmpty()) {
$this->setDefault([
'search' => $label,
'type' => 'terms',
'terms' => $quickFilter
]);
}
}
}
return $this;
}
protected function hasMore($data, $than)
{
if (is_array($data)) {
return count($data) > $than;
} elseif ($data instanceof Countable) {
return $data->count() > $than;
} elseif ($data instanceof OuterIterator) {
return $this->hasMore($data->getInnerIterator(), $than);
}
return false;
}
/**
* Filter the given suggestions by the client's input
*
* @param Traversable $data
* @param string $searchTerm
*
* @return Generator
*/
protected function filterColumnSuggestions($data, $searchTerm)
{
foreach ($data as $key => $value) {
if ($this->matchSuggestion($key, $value, $searchTerm)) {
yield $key => $value;
}
}
}
/**
* Get whether the given suggestion should be provided to the client
*
* @param string $path
* @param string $label
* @param string $searchTerm
*
* @return bool
*/
protected function matchSuggestion($path, $label, $searchTerm)
{
return fnmatch($searchTerm, $label, FNM_CASEFOLD) || fnmatch($searchTerm, $path, FNM_CASEFOLD);
}
public function renderUnwrapped()
{
$this->ensureAssembled();
if ($this->isEmpty()) {
return '';
}
return parent::renderUnwrapped();
}
}
|