Adding upstream version 0.10.1.upstream/0.10.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

41 files changed, 2372 insertions, 0 deletions

diff --git a/vendor/ipl/stdlib/LICENSE b/vendor/ipl/stdlib/LICENSE
new file mode 100644
index 0000000..58005ec
--- /dev/null
+++ b/vendor/ipl/stdlib/LICENSE
@@ -0,0 +1,21 @@
+The MIT License
+
+Copyright (c) 2018 Icinga GmbH https://www.icinga.com
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/vendor/ipl/stdlib/composer.json b/vendor/ipl/stdlib/composer.json
new file mode 100644
index 0000000..d32c7d3
--- /dev/null
+++ b/vendor/ipl/stdlib/composer.json
@@ -0,0 +1,22 @@
+{
+    "name": "ipl/stdlib",
+    "description": "ipl Standard Library",
+    "type": "library",
+    "license": "MIT",
+    "autoload": {
+        "files": ["src/functions_include.php"],
+        "psr-4": {
+            "ipl\\Stdlib\\": "src"
+        }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "ipl\\Tests\\Stdlib\\": "tests"
+        }
+    },
+    "require": {
+        "php": ">=7.2",
+        "ext-openssl": "*",
+        "evenement/evenement": "^3"
+    }
+}
diff --git a/vendor/ipl/stdlib/src/BaseFilter.php b/vendor/ipl/stdlib/src/BaseFilter.php
new file mode 100644
index 0000000..267decb
--- /dev/null
+++ b/vendor/ipl/stdlib/src/BaseFilter.php
@@ -0,0 +1,45 @@
+<?php
+
+namespace ipl\Stdlib;
+
+use ipl\Stdlib\Filter\Rule;
+
+trait BaseFilter
+{
+    /** @var Rule Base filter */
+    private $baseFilter;
+
+    /**
+     * Get whether a base filter has been set
+     *
+     * @return bool
+     */
+    public function hasBaseFilter(): bool
+    {
+        return $this->baseFilter !== null;
+    }
+
+    /**
+     * Get the base filter
+     *
+     * @return ?Rule
+     */
+    public function getBaseFilter()
+    {
+        return $this->baseFilter;
+    }
+
+    /**
+     * Set the base filter
+     *
+     * @param Rule $baseFilter
+     *
+     * @return $this
+     */
+    public function setBaseFilter(Rule $baseFilter = null): self
+    {
+        $this->baseFilter = $baseFilter;
+
+        return $this;
+    }
+}
diff --git a/vendor/ipl/stdlib/src/Contract/Filterable.php b/vendor/ipl/stdlib/src/Contract/Filterable.php
new file mode 100644
index 0000000..2a6316a
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Contract/Filterable.php
@@ -0,0 +1,63 @@
+<?php
+
+namespace ipl\Stdlib\Contract;
+
+use ipl\Stdlib\Filter;
+
+interface Filterable
+{
+    /**
+     * Get the filter of the query
+     *
+     * @return Filter\Chain
+     */
+    public function getFilter();
+
+    /**
+     * Add a filter to the query
+     *
+     * Note that this method does not override an already set filter. Instead, multiple calls to this function add
+     * the specified filter using a {@see Filter\All} chain.
+     *
+     * @param Filter\Rule $filter
+     *
+     * @return $this
+     */
+    public function filter(Filter\Rule $filter);
+
+    /**
+     * Add a filter to the query
+     *
+     * Note that this method does not override an already set filter. Instead, multiple calls to this function add
+     * the specified filter using a {@see Filter\Any} chain.
+     *
+     * @param Filter\Rule $filter
+     *
+     * @return $this
+     */
+    public function orFilter(Filter\Rule $filter);
+
+    /**
+     * Add a filter to the query
+     *
+     * Note that this method does not override an already set filter. Instead, multiple calls to this function add
+     * the specified filter wrapped by a {@see Filter\None} chain and using a {@see Filter\All} chain.
+     *
+     * @param Filter\Rule $filter
+     *
+     * @return $this
+     */
+    public function notFilter(Filter\Rule $filter);
+
+    /**
+     * Add a filter to the query
+     *
+     * Note that this method does not override an already set filter. Instead, multiple calls to this function add
+     * the specified filter wrapped by a {@see Filter\None} chain and using a {@see Filter\Any} chain.
+     *
+     * @param Filter\Rule $filter
+     *
+     * @return $this
+     */
+    public function orNotFilter(Filter\Rule $filter);
+}
diff --git a/vendor/ipl/stdlib/src/Contract/Paginatable.php b/vendor/ipl/stdlib/src/Contract/Paginatable.php
new file mode 100644
index 0000000..3e2a4ee
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Contract/Paginatable.php
@@ -0,0 +1,56 @@
+<?php
+
+namespace ipl\Stdlib\Contract;
+
+use Countable;
+
+interface Paginatable extends Countable
+{
+    /**
+     * Get whether a limit is set
+     *
+     * @return bool
+     */
+    public function hasLimit();
+
+    /**
+     * Get the limit
+     *
+     * @return int|null
+     */
+    public function getLimit();
+
+    /**
+     * Set the limit
+     *
+     * @param int|null $limit Maximum number of items to return. If you want to disable the limit,
+     *                        it is best practice to use null or a negative value
+     *
+     * @return $this
+     */
+    public function limit($limit);
+
+    /**
+     * Get whether an offset is set
+     *
+     * @return bool
+     */
+    public function hasOffset();
+
+    /**
+     * Get the offset
+     *
+     * @return int|null
+     */
+    public function getOffset();
+
+    /**
+     * Set the offset
+     *
+     * @param int|null $offset Start result set after this many rows. If you want to disable the offset,
+     *                         it is best practice to use null or a negative value
+     *
+     * @return $this
+     */
+    public function offset($offset);
+}
diff --git a/vendor/ipl/stdlib/src/Contract/PaginationInterface.php b/vendor/ipl/stdlib/src/Contract/PaginationInterface.php
new file mode 100644
index 0000000..b00fa66
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Contract/PaginationInterface.php
@@ -0,0 +1,8 @@
+<?php
+
+namespace ipl\Stdlib\Contract;
+
+/** @deprecated Use {@link Paginatable} instead */
+interface PaginationInterface extends Paginatable
+{
+}
diff --git a/vendor/ipl/stdlib/src/Contract/PluginLoader.php b/vendor/ipl/stdlib/src/Contract/PluginLoader.php
new file mode 100644
index 0000000..1be779c
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Contract/PluginLoader.php
@@ -0,0 +1,21 @@
+<?php
+
+namespace ipl\Stdlib\Contract;
+
+/**
+ * Representation of plugin loaders
+ *
+ * Plugin loaders must implement the {@link load()} method in order to provide the fully qualified class name of a
+ * plugin to load.
+ */
+interface PluginLoader
+{
+    /**
+     * Load the class file for a given plugin name
+     *
+     * @param string $name Name of the plugin
+     *
+     * @return string|false FQN of the plugin's class if found, false otherwise
+     */
+    public function load($name);
+}
diff --git a/vendor/ipl/stdlib/src/Contract/Translator.php b/vendor/ipl/stdlib/src/Contract/Translator.php
new file mode 100644
index 0000000..85ab515
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Contract/Translator.php
@@ -0,0 +1,65 @@
+<?php
+
+namespace ipl\Stdlib\Contract;
+
+/**
+ * Representation of translators
+ */
+interface Translator
+{
+    /**
+     * Translate a message
+     *
+     * @param string $message
+     * @param string $context Message context
+     *
+     * @return string Translated message or original message if no translation is found
+     */
+    public function translate($message, $context = null);
+
+    /**
+     * Translate a message in the given domain
+     *
+     * If no translation is found in the specified domain, the translation is also searched for in the default domain.
+     *
+     * @param string $domain
+     * @param string $message
+     * @param string $context Message context
+     *
+     * @return string Translated message or original message if no translation is found
+     */
+    public function translateInDomain($domain, $message, $context = null);
+
+    /**
+     * Translate a plural message
+     *
+     * The returned message is based on the given number to decide between the singular and plural forms.
+     * That is also the case if no translation is found.
+     *
+     * @param string $singular Singular message
+     * @param string $plural   Plural message
+     * @param int    $number   Number to decide between the returned singular and plural forms
+     * @param string $context  Message context
+     *
+     * @return string Translated message or original message if no translation is found
+     */
+    public function translatePlural($singular, $plural, $number, $context = null);
+
+    /**
+     * Translate a plural message in the given domain
+     *
+     * If no translation is found in the specified domain, the translation is also searched for in the default domain.
+     *
+     * The returned message is based on the given number to decide between the singular and plural forms.
+     * That is also the case if no translation is found.
+     *
+     * @param string $domain
+     * @param string $singular Singular message
+     * @param string $plural   Plural message
+     * @param int    $number   Number to decide between the returned singular and plural forms
+     * @param string $context  Message context
+     *
+     * @return string Translated message or original message if no translation is found
+     */
+    public function translatePluralInDomain($domain, $singular, $plural, $number, $context = null);
+}
diff --git a/vendor/ipl/stdlib/src/Contract/Validator.php b/vendor/ipl/stdlib/src/Contract/Validator.php
new file mode 100644
index 0000000..c03efab
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Contract/Validator.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace ipl\Stdlib\Contract;
+
+interface Validator
+{
+    /**
+     * Get whether the given value is valid
+     *
+     * @param mixed $value
+     *
+     * @return bool
+     */
+    public function isValid($value);
+
+    /**
+     * Get the validation error messages
+     *
+     * @return array
+     */
+    public function getMessages();
+}
diff --git a/vendor/ipl/stdlib/src/Contract/ValidatorInterface.php b/vendor/ipl/stdlib/src/Contract/ValidatorInterface.php
new file mode 100644
index 0000000..36cf55e
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Contract/ValidatorInterface.php
@@ -0,0 +1,8 @@
+<?php
+
+namespace ipl\Stdlib\Contract;
+
+/** @deprecated Use {@link Validator} instead */
+interface ValidatorInterface extends Validator
+{
+}
diff --git a/vendor/ipl/stdlib/src/Data.php b/vendor/ipl/stdlib/src/Data.php
new file mode 100644
index 0000000..0edb224
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Data.php
@@ -0,0 +1,89 @@
+<?php
+
+namespace ipl\Stdlib;
+
+class Data
+{
+    /** @var array */
+    protected $data = [];
+
+    /**
+     * Check whether there's any data
+     *
+     * @return bool
+     */
+    public function isEmpty()
+    {
+        return empty($this->data);
+    }
+
+    /**
+     * Check whether the given data exists
+     *
+     * @param string $name The name of the data
+     *
+     * @return bool
+     */
+    public function has($name)
+    {
+        return array_key_exists($name, $this->data);
+    }
+
+    /**
+     * Get the value of the given data
+     *
+     * @param string $name The name of the data
+     * @param mixed $default The value to return if there's no such data
+     *
+     * @return mixed
+     */
+    public function get($name, $default = null)
+    {
+        if ($this->has($name)) {
+            return $this->data[$name];
+        }
+
+        return $default;
+    }
+
+    /**
+     * Set the value of the given data
+     *
+     * @param string $name The name of the data
+     * @param mixed $value
+     *
+     * @return $this
+     */
+    public function set($name, $value)
+    {
+        $this->data[$name] = $value;
+
+        return $this;
+    }
+
+    /**
+     * Merge the given data
+     *
+     * @param Data $with
+     *
+     * @return $this
+     */
+    public function merge(self $with)
+    {
+        $this->data = array_merge($this->data, $with->data);
+
+        return $this;
+    }
+
+    /**
+     * Clear all data
+     *
+     * @return $this
+     */
+    public function clear()
+    {
+        $this->data = [];
+
+        return $this;
+    }
+}
diff --git a/vendor/ipl/stdlib/src/EventEmitter.php b/vendor/ipl/stdlib/src/EventEmitter.php
new file mode 100644
index 0000000..6d189ee
--- /dev/null
+++ b/vendor/ipl/stdlib/src/EventEmitter.php
@@ -0,0 +1,9 @@
+<?php
+
+namespace ipl\Stdlib;
+
+/** @deprecated Use {@link Events} instead */
+trait EventEmitter
+{
+    use Events;
+}
diff --git a/vendor/ipl/stdlib/src/Events.php b/vendor/ipl/stdlib/src/Events.php
new file mode 100644
index 0000000..3405086
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Events.php
@@ -0,0 +1,57 @@
+<?php
+
+namespace ipl\Stdlib;
+
+use Evenement\EventEmitterTrait;
+use InvalidArgumentException;
+
+trait Events
+{
+    use EventEmitterTrait {
+        EventEmitterTrait::on as private evenementUnvalidatedOn;
+    }
+
+    /** @var array */
+    protected $eventsEmittedOnce = [];
+
+    /**
+     * @param string $event
+     * @param array $arguments
+     */
+    protected function emitOnce($event, array $arguments = [])
+    {
+        if (! isset($this->eventsEmittedOnce[$event])) {
+            $this->eventsEmittedOnce[$event] = true;
+            $this->emit($event, $arguments);
+        }
+    }
+
+    /**
+     * @param string $event
+     * @param callable $listener
+     * @return $this
+     */
+    public function on($event, callable $listener)
+    {
+        $this->assertValidEvent($event);
+        $this->evenementUnvalidatedOn($event, $listener);
+
+        return $this;
+    }
+
+    protected function assertValidEvent($event)
+    {
+        if (! $this->isValidEvent($event)) {
+            throw new InvalidArgumentException("$event is not a valid event");
+        }
+    }
+
+    /**
+     * @param string $event
+     * @return bool
+     */
+    public function isValidEvent($event)
+    {
+        return true;
+    }
+}
diff --git a/vendor/ipl/stdlib/src/Filter.php b/vendor/ipl/stdlib/src/Filter.php
new file mode 100644
index 0000000..9b60f8e
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Filter.php
@@ -0,0 +1,578 @@
+<?php
+
+namespace ipl\Stdlib;
+
+use Exception;
+use InvalidArgumentException;
+use ipl\Stdlib\Filter\All;
+use ipl\Stdlib\Filter\Any;
+use ipl\Stdlib\Filter\Chain;
+use ipl\Stdlib\Filter\Condition;
+use ipl\Stdlib\Filter\Equal;
+use ipl\Stdlib\Filter\GreaterThan;
+use ipl\Stdlib\Filter\GreaterThanOrEqual;
+use ipl\Stdlib\Filter\LessThan;
+use ipl\Stdlib\Filter\LessThanOrEqual;
+use ipl\Stdlib\Filter\Like;
+use ipl\Stdlib\Filter\None;
+use ipl\Stdlib\Filter\Rule;
+use ipl\Stdlib\Filter\Unequal;
+use ipl\Stdlib\Filter\Unlike;
+
+class Filter
+{
+    /**
+     * protected - This is only a factory class
+     */
+    protected function __construct()
+    {
+    }
+
+    /**
+     * Return whether the given rule matches the given item
+     *
+     * @param Rule $rule
+     * @param array|object $row
+     *
+     * @return bool
+     */
+    public static function match(Rule $rule, $row)
+    {
+        if (! is_object($row)) {
+            if (is_array($row)) {
+                $row = (object) $row;
+            } else {
+                throw new InvalidArgumentException(sprintf(
+                    'Object or array expected, got %s instead',
+                    get_php_type($row)
+                ));
+            }
+        }
+
+        return (new self())->performMatch($rule, $row);
+    }
+
+    /**
+     * Create a rule that matches if **all** of the given rules do
+     *
+     * @param Rule ...$rules
+     *
+     * @return Chain
+     */
+    public static function all(Rule ...$rules)
+    {
+        return new All(...$rules);
+    }
+
+    /**
+     * Return whether the given rules all match the given item
+     *
+     * @param All $rules
+     * @param object $row
+     *
+     * @return bool
+     */
+    protected function matchAll(All $rules, $row)
+    {
+        foreach ($rules as $rule) {
+            if (! $this->performMatch($rule, $row)) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    /**
+     * Create a rule that matches if **any** of the given rules do
+     *
+     * @param Rule ...$rules
+     *
+     * @return Chain
+     */
+    public static function any(Rule ...$rules)
+    {
+        return new Any(...$rules);
+    }
+
+    /**
+     * Return whether any of the given rules match the given item
+     *
+     * @param Any $rules
+     * @param object $row
+     *
+     * @return bool
+     */
+    protected function matchAny(Any $rules, $row)
+    {
+        foreach ($rules as $rule) {
+            if ($this->performMatch($rule, $row)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Create a rule that matches if **none** of the given rules do
+     *
+     * @param Rule ...$rules
+     *
+     * @return Chain
+     */
+    public static function none(Rule ...$rules)
+    {
+        return new None(...$rules);
+    }
+
+    /**
+     * Return whether none of the given rules match the given item
+     *
+     * @param None $rules
+     * @param object $row
+     *
+     * @return bool
+     */
+    protected function matchNone(None $rules, $row)
+    {
+        foreach ($rules as $rule) {
+            if ($this->performMatch($rule, $row)) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    /**
+     * Create a rule that matches rows with a column that **equals** the given value
+     *
+     * @param string $column
+     * @param array|bool|float|int|string $value
+     *
+     * @return Condition
+     */
+    public static function equal($column, $value)
+    {
+        return new Equal($column, $value);
+    }
+
+    /**
+     * Return whether the given rule's value equals the given item's value
+     *
+     * @param Equal|Unequal $rule
+     * @param object $row
+     *
+     * @return bool
+     */
+    protected function matchEqual($rule, $row)
+    {
+        if (! $rule instanceof Equal && ! $rule instanceof Unequal) {
+            throw new InvalidArgumentException(sprintf(
+                'Rule must be of type %s or %s, got %s instead',
+                Equal::class,
+                Unequal::class,
+                get_php_type($rule)
+            ));
+        }
+
+        $rowValue = $this->extractValue($rule->getColumn(), $row);
+        $value = $rule->getValue();
+        $this->normalizeTypes($rowValue, $value);
+
+        if (! is_array($rowValue)) {
+            $rowValue = [$rowValue];
+        }
+
+        foreach ($rowValue as $rowVal) {
+            if ($this->performEqualityMatch($value, $rowVal, $rule->ignoresCase())) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Create a rule that matches rows with a column that is **similar** to the given value
+     *
+     * Performs a wildcard search if the value contains asterisks.
+     *
+     * @param string $column
+     * @param string|string[] $value
+     *
+     * @return Condition
+     */
+    public static function like($column, $value)
+    {
+        return new Like($column, $value);
+    }
+
+    /**
+     * Return whether the given rule's value is similar to the given item's value
+     *
+     * @param Like|Unlike $rule
+     * @param object $row
+     *
+     * @return bool
+     */
+    protected function matchSimilar($rule, $row)
+    {
+        if (! $rule instanceof Like && ! $rule instanceof Unlike) {
+            throw new InvalidArgumentException(sprintf(
+                'Rule must be of type %s or %s, got %s instead',
+                Like::class,
+                Unlike::class,
+                get_php_type($rule)
+            ));
+        }
+
+        $rowValue = $this->extractValue($rule->getColumn(), $row);
+        $value = $rule->getValue();
+        $this->normalizeTypes($rowValue, $value);
+
+        if (! is_array($rowValue)) {
+            $rowValue = [$rowValue];
+        }
+
+        foreach ($rowValue as $rowVal) {
+            if ($this->performSimilarityMatch($value, $rowVal, $rule->ignoresCase())) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Apply equality matching rules on the given row value
+     *
+     * @param mixed $value
+     * @param mixed $rowValue
+     * @param bool $ignoreCase
+     *
+     * @return bool
+     */
+    protected function performEqualityMatch($value, $rowValue, $ignoreCase = false)
+    {
+        if ($ignoreCase && is_string($rowValue)) {
+            $rowValue = strtolower($rowValue);
+            $value = is_array($value)
+                ? array_map('strtolower', $value)
+                : strtolower($value);
+        }
+
+        if (is_array($value)) {
+            return in_array($rowValue, $value, true);
+        } elseif (! is_string($value)) {
+            if (is_string($rowValue)) {
+                $value = (string) $value;
+            }
+        }
+
+        return $rowValue === $value;
+    }
+
+    /**
+     * Apply similarity matching rules on the given row value
+     *
+     * @param string|string[] $value
+     * @param string $rowValue
+     * @param bool $ignoreCase
+     *
+     * @return bool
+     */
+    protected function performSimilarityMatch($value, $rowValue, $ignoreCase = false)
+    {
+        if ($ignoreCase) {
+            $rowValue = strtolower($rowValue);
+            $value = is_array($value)
+                ? array_map('strtolower', $value)
+                : strtolower($value);
+        }
+
+        if (is_array($value)) {
+            return in_array($rowValue, $value, true);
+        }
+
+        $wildcardSubSegments = preg_split('~\*~', $value);
+        if (count($wildcardSubSegments) === 1) {
+            return $rowValue === $value;
+        }
+
+        $parts = [];
+        foreach ($wildcardSubSegments as $part) {
+            $parts[] = preg_quote($part, '~');
+        }
+
+        $pattern = '~^' . join('.*', $parts) . '$~';
+
+        return (bool) preg_match($pattern, $rowValue);
+    }
+
+    /**
+     * Create a rule that matches rows with a column that is **unequal** with the given value
+     *
+     * @param string $column
+     * @param array|bool|float|int|string $value
+     *
+     * @return Condition
+     */
+    public static function unequal($column, $value)
+    {
+        return new Unequal($column, $value);
+    }
+
+    /**
+     * Return whether the given rule's value does not equal the given item's value
+     *
+     * @param Unequal $rule
+     * @param object $row
+     *
+     * @return bool
+     */
+    protected function matchUnequal(Unequal $rule, $row)
+    {
+        return ! $this->matchEqual($rule, $row);
+    }
+
+    /**
+     * Create a rule that matches rows with a column that is **unlike** with the given value
+     *
+     * Performs a wildcard search if the value contains asterisks.
+     *
+     * @param string $column
+     * @param string|string[] $value
+     *
+     * @return Condition
+     */
+    public static function unlike($column, $value)
+    {
+        return new Unlike($column, $value);
+    }
+
+    /**
+     * Return whether the given rule's value is unlike the given item's value
+     *
+     * @param Unlike $rule
+     * @param object $row
+     *
+     * @return bool
+     */
+    protected function matchUnlike(Unlike $rule, $row)
+    {
+        return ! $this->matchSimilar($rule, $row);
+    }
+
+    /**
+     * Create a rule that matches rows with a column that is **greater** than the given value
+     *
+     * @param string $column
+     * @param float|int|string $value
+     *
+     * @return Condition
+     */
+    public static function greaterThan($column, $value)
+    {
+        return new GreaterThan($column, $value);
+    }
+
+    /**
+     * Return whether the given rule's value is greater than the given item's value
+     *
+     * @param GreaterThan $rule
+     * @param object $row
+     *
+     * @return bool
+     */
+    protected function matchGreaterThan(GreaterThan $rule, $row)
+    {
+        return $this->extractValue($rule->getColumn(), $row) > $rule->getValue();
+    }
+
+    /**
+     * Create a rule that matches rows with a column that is **less** than the given value
+     *
+     * @param string $column
+     * @param float|int|string $value
+     *
+     * @return Condition
+     */
+    public static function lessThan($column, $value)
+    {
+        return new LessThan($column, $value);
+    }
+
+    /**
+     * Return whether the given rule's value is less than the given item's value
+     *
+     * @param LessThan $rule
+     * @param object $row
+     *
+     * @return bool
+     */
+    protected function matchLessThan(LessThan $rule, $row)
+    {
+        $rowValue = $this->extractValue($rule->getColumn(), $row);
+        if ($rowValue === null) {
+            return false;
+        }
+
+        return $rowValue < $rule->getValue();
+    }
+
+    /**
+     * Create a rule that matches rows with a column that is **greater** than or **equal** to the given value
+     *
+     * @param string $column
+     * @param float|int|string $value
+     *
+     * @return Condition
+     */
+    public static function greaterThanOrEqual($column, $value)
+    {
+        return new GreaterThanOrEqual($column, $value);
+    }
+
+    /**
+     * Return whether the given rule's value is greater than or equals the given item's value
+     *
+     * @param GreaterThanOrEqual $rule
+     * @param object $row
+     *
+     * @return bool
+     */
+    protected function matchGreaterThanOrEqual(GreaterThanOrEqual $rule, $row)
+    {
+        return $this->extractValue($rule->getColumn(), $row) >= $rule->getValue();
+    }
+
+    /**
+     * Create a rule that matches rows with a column that is **less** than or **equal** to the given value
+     *
+     * @param string $column
+     * @param float|int|string $value
+     *
+     * @return Condition
+     */
+    public static function lessThanOrEqual($column, $value)
+    {
+        return new LessThanOrEqual($column, $value);
+    }
+
+    /**
+     * Return whether the given rule's value is less than or equals the given item's value
+     *
+     * @param LessThanOrEqual $rule
+     * @param object $row
+     *
+     * @return bool
+     */
+    protected function matchLessThanOrEqual(LessThanOrEqual $rule, $row)
+    {
+        $rowValue = $this->extractValue($rule->getColumn(), $row);
+        if ($rowValue === null) {
+            return false;
+        }
+
+        return $rowValue <= $rule->getValue();
+    }
+
+    /**
+     * Perform the appropriate match for the given rule on the given item
+     *
+     * @param Rule $rule
+     * @param object $row
+     *
+     * @return bool
+     */
+    protected function performMatch(Rule $rule, $row)
+    {
+        switch (true) {
+            case $rule instanceof All:
+                return $this->matchAll($rule, $row);
+            case $rule instanceof Any:
+                return $this->matchAny($rule, $row);
+            case $rule instanceof Like:
+                return $this->matchSimilar($rule, $row);
+            case $rule instanceof Equal:
+                return $this->matchEqual($rule, $row);
+            case $rule instanceof GreaterThan:
+                return $this->matchGreaterThan($rule, $row);
+            case $rule instanceof GreaterThanOrEqual:
+                return $this->matchGreaterThanOrEqual($rule, $row);
+            case $rule instanceof LessThan:
+                return $this->matchLessThan($rule, $row);
+            case $rule instanceof LessThanOrEqual:
+                return $this->matchLessThanOrEqual($rule, $row);
+            case $rule instanceof None:
+                return $this->matchNone($rule, $row);
+            case $rule instanceof Unequal:
+                return $this->matchUnequal($rule, $row);
+            case $rule instanceof Unlike:
+                return $this->matchUnlike($rule, $row);
+            default:
+                throw new InvalidArgumentException(sprintf(
+                    'Unable to match filter. Rule type %s is unknown',
+                    get_class($rule)
+                ));
+        }
+    }
+
+    /**
+     * Return a value from the given row suitable to work with
+     *
+     * @param string $column
+     * @param object $row
+     *
+     * @return mixed
+     */
+    protected function extractValue($column, $row)
+    {
+        try {
+            return $row->{$column};
+        } catch (Exception $_) {
+            return null;
+        }
+    }
+
+    /**
+     * Normalize type of $value to the one of $rowValue
+     *
+     * For details on how this works please see the corresponding test
+     * {@see \ipl\Tests\Stdlib\FilterTest::testConditionsAreValueTypeAgnostic}
+     *
+     * @param mixed $rowValue
+     * @param mixed $value
+     *
+     * @return void
+     */
+    protected function normalizeTypes($rowValue, &$value)
+    {
+        if ($rowValue === null || $value === null) {
+            return;
+        }
+
+        if (is_array($rowValue)) {
+            if (empty($rowValue)) {
+                return;
+            }
+
+            $rowValue = array_shift($rowValue);
+        }
+
+        if (is_array($value)) {
+            if (is_bool($rowValue) && ! empty($value) && is_string(array_values($value)[0])) {
+                return;
+            }
+
+            $rowValueType = gettype($rowValue);
+            foreach ($value as &$val) {
+                settype($val, $rowValueType);
+            }
+        } elseif (! is_bool($rowValue) || ! is_string($value)) {
+            settype($value, gettype($rowValue));
+        }
+    }
+}
diff --git a/vendor/ipl/stdlib/src/Filter/All.php b/vendor/ipl/stdlib/src/Filter/All.php
new file mode 100644
index 0000000..67b47b6
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Filter/All.php
@@ -0,0 +1,7 @@
+<?php
+
+namespace ipl\Stdlib\Filter;
+
+class All extends Chain
+{
+}
diff --git a/vendor/ipl/stdlib/src/Filter/Any.php b/vendor/ipl/stdlib/src/Filter/Any.php
new file mode 100644
index 0000000..5d47ebe
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Filter/Any.php
@@ -0,0 +1,7 @@
+<?php
+
+namespace ipl\Stdlib\Filter;
+
+class Any extends Chain
+{
+}
diff --git a/vendor/ipl/stdlib/src/Filter/Chain.php b/vendor/ipl/stdlib/src/Filter/Chain.php
new file mode 100644
index 0000000..a64f095
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Filter/Chain.php
@@ -0,0 +1,179 @@
+<?php
+
+namespace ipl\Stdlib\Filter;
+
+use ArrayIterator;
+use Countable;
+use IteratorAggregate;
+use OutOfBoundsException;
+use Traversable;
+
+abstract class Chain implements Rule, MetaDataProvider, IteratorAggregate, Countable
+{
+    use MetaData;
+
+    /** @var Rule[] */
+    protected $rules = [];
+
+    /**
+     * Create a new Chain
+     *
+     * @param Rule ...$rules
+     */
+    public function __construct(Rule ...$rules)
+    {
+        foreach ($rules as $rule) {
+            $this->add($rule);
+        }
+    }
+
+    /**
+     * Clone this chain's meta data and rules
+     */
+    public function __clone()
+    {
+        if ($this->metaData !== null) {
+            $this->metaData = clone $this->metaData;
+        }
+
+        foreach ($this->rules as $i => $rule) {
+            $this->rules[$i] = clone $rule;
+        }
+    }
+
+    /**
+     * Get an iterator this chain's rules
+     *
+     * @return ArrayIterator
+     */
+    public function getIterator(): Traversable
+    {
+        return new ArrayIterator($this->rules);
+    }
+
+    /**
+     * Add a rule to this chain
+     *
+     * @param Rule $rule
+     *
+     * @return $this
+     */
+    public function add(Rule $rule)
+    {
+        $this->rules[] = $rule;
+
+        return $this;
+    }
+
+    /**
+     * Prepend a rule to an existing rule in this chain
+     *
+     * @param Rule $rule
+     * @param Rule $before
+     *
+     * @throws OutOfBoundsException In case no existing rule is found
+     * @return $this
+     */
+    public function insertBefore(Rule $rule, Rule $before)
+    {
+        $ruleAt = array_search($before, $this->rules, true);
+        if ($ruleAt === false) {
+            throw new OutOfBoundsException('Reference rule not found');
+        }
+
+        array_splice($this->rules, $ruleAt, 0, [$rule]);
+
+        return $this;
+    }
+
+    /**
+     * Append a rule to an existing rule in this chain
+     *
+     * @param Rule $rule
+     * @param Rule $after
+     *
+     * @throws OutOfBoundsException In case no existing rule is found
+     * @return $this
+     */
+    public function insertAfter(Rule $rule, Rule $after)
+    {
+        $ruleAt = array_search($after, $this->rules, true);
+        if ($ruleAt === false) {
+            throw new OutOfBoundsException('Reference rule not found');
+        }
+
+        array_splice($this->rules, $ruleAt + 1, 0, [$rule]);
+
+        return $this;
+    }
+
+    /**
+     * Get whether this chain contains the given rule
+     *
+     * @param Rule $rule
+     *
+     * @return bool
+     */
+    public function has(Rule $rule)
+    {
+        return array_search($rule, $this->rules, true) !== false;
+    }
+
+    /**
+     * Replace a rule with another one in this chain
+     *
+     * @param Rule $rule
+     * @param Rule $replacement
+     *
+     * @throws OutOfBoundsException In case no existing rule is found
+     * @return $this
+     */
+    public function replace(Rule $rule, Rule $replacement)
+    {
+        $ruleAt = array_search($rule, $this->rules, true);
+        if ($ruleAt === false) {
+            throw new OutOfBoundsException('Rule to replace not found');
+        }
+
+        array_splice($this->rules, $ruleAt, 1, [$replacement]);
+
+        return $this;
+    }
+
+    /**
+     * Remove a rule from this chain
+     *
+     * @param Rule $rule
+     *
+     * @return $this
+     */
+    public function remove(Rule $rule)
+    {
+        $ruleAt = array_search($rule, $this->rules, true);
+        if ($ruleAt !== false) {
+            array_splice($this->rules, $ruleAt, 1, []);
+        }
+
+        return $this;
+    }
+
+    /**
+     * Get whether this chain has any rules
+     *
+     * @return bool
+     */
+    public function isEmpty()
+    {
+        return empty($this->rules);
+    }
+
+    /**
+     * Count this chain's rules
+     *
+     * @return int
+     */
+    public function count(): int
+    {
+        return count($this->rules);
+    }
+}
diff --git a/vendor/ipl/stdlib/src/Filter/Condition.php b/vendor/ipl/stdlib/src/Filter/Condition.php
new file mode 100644
index 0000000..cc35610
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Filter/Condition.php
@@ -0,0 +1,84 @@
+<?php
+
+namespace ipl\Stdlib\Filter;
+
+abstract class Condition implements Rule, MetaDataProvider
+{
+    use MetaData;
+
+    /** @var string */
+    protected $column;
+
+    /** @var mixed */
+    protected $value;
+
+    /**
+     * Create a new Condition
+     *
+     * @param string $column
+     * @param mixed $value
+     */
+    public function __construct($column, $value)
+    {
+        $this->setColumn($column)
+            ->setValue($value);
+    }
+
+    /**
+     * Clone this condition's meta data
+     */
+    public function __clone()
+    {
+        if ($this->metaData !== null) {
+            $this->metaData = clone $this->metaData;
+        }
+    }
+
+    /**
+     * Set this condition's column
+     *
+     * @param string $column
+     *
+     * @return $this
+     */
+    public function setColumn($column)
+    {
+        $this->column = $column;
+
+        return $this;
+    }
+
+    /**
+     * Get this condition's column
+     *
+     * @return string
+     */
+    public function getColumn()
+    {
+        return $this->column;
+    }
+
+    /**
+     * Set this condition's value
+     *
+     * @param mixed $value
+     *
+     * @return $this
+     */
+    public function setValue($value)
+    {
+        $this->value = $value;
+
+        return $this;
+    }
+
+    /**
+     * Get this condition's value
+     *
+     * @return mixed
+     */
+    public function getValue()
+    {
+        return $this->value;
+    }
+}
diff --git a/vendor/ipl/stdlib/src/Filter/Equal.php b/vendor/ipl/stdlib/src/Filter/Equal.php
new file mode 100644
index 0000000..71da490
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Filter/Equal.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace ipl\Stdlib\Filter;
+
+class Equal extends Condition
+{
+    /** @var bool */
+    protected $ignoreCase = false;
+
+    /**
+     * Ignore case on both sides of the equation
+     *
+     * @return $this
+     */
+    public function ignoreCase()
+    {
+        $this->ignoreCase = true;
+
+        return $this;
+    }
+
+    /**
+    * Return whether this rule ignores case
+    *
+    * @return bool
+    */
+    public function ignoresCase()
+    {
+        return $this->ignoreCase;
+    }
+}
diff --git a/vendor/ipl/stdlib/src/Filter/GreaterThan.php b/vendor/ipl/stdlib/src/Filter/GreaterThan.php
new file mode 100644
index 0000000..fd8190c
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Filter/GreaterThan.php
@@ -0,0 +1,7 @@
+<?php
+
+namespace ipl\Stdlib\Filter;
+
+class GreaterThan extends Condition
+{
+}
diff --git a/vendor/ipl/stdlib/src/Filter/GreaterThanOrEqual.php b/vendor/ipl/stdlib/src/Filter/GreaterThanOrEqual.php
new file mode 100644
index 0000000..4cd4a73
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Filter/GreaterThanOrEqual.php
@@ -0,0 +1,7 @@
+<?php
+
+namespace ipl\Stdlib\Filter;
+
+class GreaterThanOrEqual extends Condition
+{
+}
diff --git a/vendor/ipl/stdlib/src/Filter/LessThan.php b/vendor/ipl/stdlib/src/Filter/LessThan.php
new file mode 100644
index 0000000..297493f
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Filter/LessThan.php
@@ -0,0 +1,7 @@
+<?php
+
+namespace ipl\Stdlib\Filter;
+
+class LessThan extends Condition
+{
+}
diff --git a/vendor/ipl/stdlib/src/Filter/LessThanOrEqual.php b/vendor/ipl/stdlib/src/Filter/LessThanOrEqual.php
new file mode 100644
index 0000000..ef35974
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Filter/LessThanOrEqual.php
@@ -0,0 +1,7 @@
+<?php
+
+namespace ipl\Stdlib\Filter;
+
+class LessThanOrEqual extends Condition
+{
+}
diff --git a/vendor/ipl/stdlib/src/Filter/Like.php b/vendor/ipl/stdlib/src/Filter/Like.php
new file mode 100644
index 0000000..7a06279
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Filter/Like.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace ipl\Stdlib\Filter;
+
+class Like extends Condition
+{
+    /** @var bool */
+    protected $ignoreCase = false;
+
+    /**
+     * Ignore case on both sides of the equation
+     *
+     * @return $this
+     */
+    public function ignoreCase()
+    {
+        $this->ignoreCase = true;
+
+        return $this;
+    }
+
+    /**
+    * Return whether this rule ignores case
+    *
+    * @return bool
+    */
+    public function ignoresCase()
+    {
+        return $this->ignoreCase;
+    }
+}
diff --git a/vendor/ipl/stdlib/src/Filter/MetaData.php b/vendor/ipl/stdlib/src/Filter/MetaData.php
new file mode 100644
index 0000000..6fe2523
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Filter/MetaData.php
@@ -0,0 +1,20 @@
+<?php
+
+namespace ipl\Stdlib\Filter;
+
+use ipl\Stdlib\Data;
+
+trait MetaData
+{
+    /** @var Data */
+    protected $metaData;
+
+    public function metaData()
+    {
+        if ($this->metaData === null) {
+            $this->metaData = new Data();
+        }
+
+        return $this->metaData;
+    }
+}
diff --git a/vendor/ipl/stdlib/src/Filter/MetaDataProvider.php b/vendor/ipl/stdlib/src/Filter/MetaDataProvider.php
new file mode 100644
index 0000000..ef9557e
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Filter/MetaDataProvider.php
@@ -0,0 +1,15 @@
+<?php
+
+namespace ipl\Stdlib\Filter;
+
+use ipl\Stdlib\Data;
+
+interface MetaDataProvider
+{
+    /**
+     * Get this rule's meta data
+     *
+     * @return Data
+     */
+    public function metaData();
+}
diff --git a/vendor/ipl/stdlib/src/Filter/None.php b/vendor/ipl/stdlib/src/Filter/None.php
new file mode 100644
index 0000000..a1b14f7
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Filter/None.php
@@ -0,0 +1,7 @@
+<?php
+
+namespace ipl\Stdlib\Filter;
+
+class None extends Chain
+{
+}
diff --git a/vendor/ipl/stdlib/src/Filter/Rule.php b/vendor/ipl/stdlib/src/Filter/Rule.php
new file mode 100644
index 0000000..dc83c80
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Filter/Rule.php
@@ -0,0 +1,7 @@
+<?php
+
+namespace ipl\Stdlib\Filter;
+
+interface Rule
+{
+}
diff --git a/vendor/ipl/stdlib/src/Filter/Unequal.php b/vendor/ipl/stdlib/src/Filter/Unequal.php
new file mode 100644
index 0000000..5e37cbd
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Filter/Unequal.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace ipl\Stdlib\Filter;
+
+class Unequal extends Condition
+{
+    /** @var bool */
+    protected $ignoreCase = false;
+
+    /**
+     * Ignore case on both sides of the equation
+     *
+     * @return $this
+     */
+    public function ignoreCase()
+    {
+        $this->ignoreCase = true;
+
+        return $this;
+    }
+
+    /**
+    * Return whether this rule ignores case
+    *
+    * @return bool
+    */
+    public function ignoresCase()
+    {
+        return $this->ignoreCase;
+    }
+}
diff --git a/vendor/ipl/stdlib/src/Filter/Unlike.php b/vendor/ipl/stdlib/src/Filter/Unlike.php
new file mode 100644
index 0000000..16b9fb3
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Filter/Unlike.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace ipl\Stdlib\Filter;
+
+class Unlike extends Condition
+{
+    /** @var bool */
+    protected $ignoreCase = false;
+
+    /**
+     * Ignore case on both sides of the equation
+     *
+     * @return $this
+     */
+    public function ignoreCase()
+    {
+        $this->ignoreCase = true;
+
+        return $this;
+    }
+
+    /**
+    * Return whether this rule ignores case
+    *
+    * @return bool
+    */
+    public function ignoresCase()
+    {
+        return $this->ignoreCase;
+    }
+}
diff --git a/vendor/ipl/stdlib/src/Filters.php b/vendor/ipl/stdlib/src/Filters.php
new file mode 100644
index 0000000..defff43
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Filters.php
@@ -0,0 +1,58 @@
+<?php
+
+namespace ipl\Stdlib;
+
+trait Filters
+{
+    /** @var Filter\Chain */
+    protected $filter;
+
+    public function getFilter()
+    {
+        return $this->filter ?: Filter::all();
+    }
+
+    public function filter(Filter\Rule $filter)
+    {
+        $currentFilter = $this->getFilter();
+        if ($currentFilter instanceof Filter\All) {
+            $this->filter = $currentFilter->add($filter);
+        } else {
+            $this->filter = Filter::all($filter);
+            if (! $currentFilter->isEmpty()) {
+                $this->filter->insertBefore($currentFilter, $filter);
+            }
+        }
+
+        return $this;
+    }
+
+    public function orFilter(Filter\Rule $filter)
+    {
+        $currentFilter = $this->getFilter();
+        if ($currentFilter instanceof Filter\Any) {
+            $this->filter = $currentFilter->add($filter);
+        } else {
+            $this->filter = Filter::any($filter);
+            if (! $currentFilter->isEmpty()) {
+                $this->filter->insertBefore($currentFilter, $filter);
+            }
+        }
+
+        return $this;
+    }
+
+    public function notFilter(Filter\Rule $filter)
+    {
+        $this->filter(Filter::none($filter));
+
+        return $this;
+    }
+
+    public function orNotFilter(Filter\Rule $filter)
+    {
+        $this->orFilter(Filter::none($filter));
+
+        return $this;
+    }
+}
diff --git a/vendor/ipl/stdlib/src/Loader/AutoloadingPluginLoader.php b/vendor/ipl/stdlib/src/Loader/AutoloadingPluginLoader.php
new file mode 100644
index 0000000..ba195c6
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Loader/AutoloadingPluginLoader.php
@@ -0,0 +1,52 @@
+<?php
+
+namespace ipl\Stdlib\Loader;
+
+use ipl\Stdlib\Contract\PluginLoader;
+
+/**
+ * Plugin loader that makes use of registered PHP autoloaders
+ */
+class AutoloadingPluginLoader implements PluginLoader
+{
+    /** @var string Namespace of the plugins */
+    protected $namespace;
+
+    /** @var string Class name postfix */
+    protected $postfix;
+
+    /**
+     * Create a new autoloading plugin loader
+     *
+     * @param string $namespace Namespace of the plugins
+     * @param string $postfix   Class name postfix
+     */
+    public function __construct($namespace, $postfix = '')
+    {
+        $this->namespace = $namespace;
+        $this->postfix = $postfix;
+    }
+
+    /**
+     * Get the FQN of a plugin
+     *
+     * @param string $name Name of the plugin
+     *
+     * @return string
+     */
+    protected function getFqn($name)
+    {
+        return $this->namespace . '\\' . ucfirst($name) . $this->postfix;
+    }
+
+    public function load($name)
+    {
+        $class = $this->getFqn($name);
+
+        if (! class_exists($class)) {
+            return false;
+        }
+
+        return $class;
+    }
+}
diff --git a/vendor/ipl/stdlib/src/MessageContainer.php b/vendor/ipl/stdlib/src/MessageContainer.php
new file mode 100644
index 0000000..3b383b1
--- /dev/null
+++ b/vendor/ipl/stdlib/src/MessageContainer.php
@@ -0,0 +1,9 @@
+<?php
+
+namespace ipl\Stdlib;
+
+/** @deprecated Use {@link Messages} instead */
+trait MessageContainer
+{
+    use Messages;
+}
diff --git a/vendor/ipl/stdlib/src/Messages.php b/vendor/ipl/stdlib/src/Messages.php
new file mode 100644
index 0000000..b601c1d
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Messages.php
@@ -0,0 +1,92 @@
+<?php
+
+namespace ipl\Stdlib;
+
+trait Messages
+{
+    /** @var array */
+    protected $messages = [];
+
+    /**
+     * Get whether there are any messages
+     *
+     * @return bool
+     */
+    public function hasMessages()
+    {
+        return ! empty($this->messages);
+    }
+
+    /**
+     * Get all messages
+     *
+     * @return array
+     */
+    public function getMessages()
+    {
+        return $this->messages;
+    }
+
+    /**
+     * Set the given messages overriding existing ones
+     *
+     * @param string[] $messages
+     *
+     * @return $this
+     */
+    public function setMessages(array $messages)
+    {
+        $this->clearMessages();
+
+        foreach ($messages as $message) {
+            $this->addMessage($message);
+        }
+
+        return $this;
+    }
+
+    /**
+     * Add a single message
+     *
+     * @param string $message
+     * @param mixed  ...$args Optional args for sprintf-style messages
+     *
+     * @return $this
+     */
+    public function addMessage($message, ...$args)
+    {
+        if (empty($args)) {
+            $this->messages[] = $message;
+        } else {
+            $this->messages[] = vsprintf($message, $args);
+        }
+
+        return $this;
+    }
+
+    /**
+     * Add the given messages
+     *
+     * @param array $messages
+     *
+     * @return $this
+     */
+    public function addMessages(array $messages)
+    {
+        $this->messages = array_merge($this->messages, $messages);
+
+        return $this;
+    }
+
+    /**
+     * Drop any existing message
+     *
+     * @return $this
+     */
+    public function clearMessages()
+    {
+        $this->messages = [];
+
+        return $this;
+    }
+}
diff --git a/vendor/ipl/stdlib/src/Plugins.php b/vendor/ipl/stdlib/src/Plugins.php
new file mode 100644
index 0000000..a5dbb77
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Plugins.php
@@ -0,0 +1,95 @@
+<?php
+
+namespace ipl\Stdlib;
+
+use ipl\Stdlib\Contract\PluginLoader;
+use ipl\Stdlib\Loader\AutoloadingPluginLoader;
+
+trait Plugins
+{
+    /** @var array Registered plugin loaders by type */
+    protected $pluginLoaders = [];
+
+    /**
+     * Factory for plugin loaders
+     *
+     * @param PluginLoader|string $loaderOrNamespace
+     * @param string              $postfix
+     *
+     * @return PluginLoader
+     */
+    public static function wantPluginLoader($loaderOrNamespace, $postfix = '')
+    {
+        if ($loaderOrNamespace instanceof PluginLoader) {
+            $loader = $loaderOrNamespace;
+        } else {
+            $loader = new AutoloadingPluginLoader($loaderOrNamespace, $postfix);
+        }
+
+        return $loader;
+    }
+
+    /**
+     * Get whether a plugin loader for the given type exists
+     *
+     * @param string $type
+     *
+     * @return bool
+     */
+    public function hasPluginLoader($type)
+    {
+        return isset($this->pluginLoaders[$type]);
+    }
+
+    /**
+     * Add a plugin loader for the given type
+     *
+     * @param string              $type
+     * @param PluginLoader|string $loaderOrNamespace
+     * @param string              $postfix
+     *
+     * @return $this
+     */
+    public function addPluginLoader($type, $loaderOrNamespace, $postfix = '')
+    {
+        $loader = static::wantPluginLoader($loaderOrNamespace, $postfix);
+
+        if (! isset($this->pluginLoaders[$type])) {
+            $this->pluginLoaders[$type] = [];
+        }
+
+        array_unshift($this->pluginLoaders[$type], $loader);
+
+        return $this;
+    }
+
+    /**
+     * Load the class file of the given plugin
+     *
+     * @param string $type
+     * @param string $name
+     *
+     * @return string|false
+     */
+    public function loadPlugin($type, $name)
+    {
+        if ($this->hasPluginLoader($type)) {
+            /** @var PluginLoader $loader */
+            foreach ($this->pluginLoaders[$type] as $loader) {
+                $class = $loader->load($name);
+                if ($class) {
+                    return $class;
+                }
+            }
+        }
+
+        return false;
+    }
+
+    protected function addDefaultPluginLoader($type, $loaderOrNamespace, $postfix)
+    {
+        $this->pluginLoaders[$type][] = static::wantPluginLoader($loaderOrNamespace, $postfix);
+
+        return $this;
+    }
+}
diff --git a/vendor/ipl/stdlib/src/PriorityQueue.php b/vendor/ipl/stdlib/src/PriorityQueue.php
new file mode 100644
index 0000000..a50b31d
--- /dev/null
+++ b/vendor/ipl/stdlib/src/PriorityQueue.php
@@ -0,0 +1,41 @@
+<?php
+
+namespace ipl\Stdlib;
+
+use Generator;
+use SplPriorityQueue;
+
+/**
+ * Stable priority queue that also maintains insertion order for items with the same priority
+ */
+class PriorityQueue extends SplPriorityQueue
+{
+    protected $serial = PHP_INT_MAX;
+
+    /**
+     * @inheritDoc
+     *
+     * Maintains insertion order for items with the same priority.
+     */
+    public function insert($value, $priority): bool
+    {
+        return parent::insert($value, [$priority, $this->serial--]);
+    }
+
+    /**
+     * Yield all items as priority-value pairs
+     *
+     * @return Generator
+     */
+    public function yieldAll()
+    {
+        // Clone queue because the SplPriorityQueue acts as a heap and thus items are removed upon iteration
+        $queue = clone $this;
+
+        $queue->setExtractFlags(static::EXTR_BOTH);
+
+        foreach ($queue as $item) {
+            yield $item['priority'][0] => $item['data'];
+        }
+    }
+}
diff --git a/vendor/ipl/stdlib/src/Properties.php b/vendor/ipl/stdlib/src/Properties.php
new file mode 100644
index 0000000..5726af3
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Properties.php
@@ -0,0 +1,205 @@
+<?php
+
+namespace ipl\Stdlib;
+
+use OutOfBoundsException;
+use Traversable;
+
+/**
+ * Trait for property access, mutation and array access.
+ */
+trait Properties
+{
+    /** @var array */
+    private $properties = [];
+
+    /**
+     * Get whether this class has any properties
+     *
+     * @return bool
+     */
+    public function hasProperties()
+    {
+        return ! empty($this->properties);
+    }
+
+    /**
+     * Get whether a property with the given key exists
+     *
+     * @param string $key
+     *
+     * @return bool
+     */
+    public function hasProperty($key)
+    {
+        return array_key_exists($key, $this->properties);
+    }
+
+    /**
+     * Set the given properties
+     *
+     * @param array $properties
+     *
+     * @return $this
+     */
+    public function setProperties(array $properties)
+    {
+        foreach ($properties as $key => $value) {
+            $this->setProperty($key, $value);
+        }
+
+        return $this;
+    }
+
+    /**
+     * Get the property by the given key
+     *
+     * @param string $key
+     *
+     * @return mixed
+     *
+     * @throws OutOfBoundsException If the property by the given key does not exist
+     */
+    protected function getProperty($key)
+    {
+        if (array_key_exists($key, $this->properties)) {
+            return $this->properties[$key];
+        }
+
+        throw new OutOfBoundsException("Can't access property '$key'. Property does not exist");
+    }
+
+    /**
+     * Set a property with the given key and value
+     *
+     * @param string $key
+     * @param mixed  $value
+     *
+     * @return $this
+     */
+    protected function setProperty($key, $value)
+    {
+        $this->properties[$key] = $value;
+
+        return $this;
+    }
+
+    /**
+     * Iterate over all existing properties
+     *
+     * @return Traversable
+     */
+    public function getIterator(): Traversable
+    {
+        foreach ($this->properties as $key => $value) {
+            yield $key => $value;
+        }
+    }
+
+    /**
+     * Check whether an offset exists
+     *
+     * @param mixed $offset
+     *
+     * @return bool
+     */
+    public function offsetExists($offset): bool
+    {
+        return isset($this->properties[$offset]);
+    }
+
+    /**
+     * Get the value for an offset
+     *
+     * @param mixed $offset
+     *
+     * @return mixed
+     */
+    #[\ReturnTypeWillChange]
+    public function offsetGet($offset)
+    {
+        return $this->getProperty($offset);
+    }
+
+    /**
+     * Set the value for an offset
+     *
+     * @param mixed $offset
+     * @param mixed $value
+     */
+    public function offsetSet($offset, $value): void
+    {
+        $this->setProperty($offset, $value);
+    }
+
+    /**
+     * Unset the value for an offset
+     *
+     * @param mixed $offset
+     */
+    public function offsetUnset($offset): void
+    {
+        unset($this->properties[$offset]);
+    }
+
+    /**
+     * Get the value of a non-public property
+     *
+     * This is a PHP magic method which is implicitly called upon access to non-public properties,
+     * e.g. `$value = $object->property;`.
+     * Do not call this method directly.
+     *
+     * @param mixed $key
+     *
+     * @return mixed
+     */
+    public function __get($key)
+    {
+        return $this->getProperty($key);
+    }
+
+    /**
+     * Set the value of a non-public property
+     *
+     * This is a PHP magic method which is implicitly called upon access to non-public properties,
+     * e.g. `$object->property = $value;`.
+     * Do not call this method directly.
+     *
+     * @param string $key
+     * @param mixed  $value
+     */
+    public function __set($key, $value)
+    {
+        $this->setProperty($key, $value);
+    }
+
+    /**
+     * Check whether a non-public property is defined and not null
+     *
+     * This is a PHP magic method which is implicitly called upon access to non-public properties,
+     * e.g. `isset($object->property);`.
+     * Do not call this method directly.
+     *
+     * @param string $key
+     *
+     * @return bool
+     */
+    public function __isset($key)
+    {
+        return $this->offsetExists($key);
+    }
+
+    /**
+     * Unset the value of a non-public property
+     *
+     * This is a PHP magic method which is implicitly called upon access to non-public properties,
+     * e.g. `unset($object->property);`. This method does nothing if the property does not exist.
+     * Do not call this method directly.
+     *
+     * @param string $key
+     */
+    public function __unset($key)
+    {
+        $this->offsetUnset($key);
+    }
+}
diff --git a/vendor/ipl/stdlib/src/Seq.php b/vendor/ipl/stdlib/src/Seq.php
new file mode 100644
index 0000000..0f40c93
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Seq.php
@@ -0,0 +1,108 @@
+<?php
+
+namespace ipl\Stdlib;
+
+/**
+ * Collection of utilities for traversables
+ */
+class Seq
+{
+    /**
+     * Check if the traversable contains the given needle
+     *
+     * @param array|iterable $traversable
+     * @param mixed $needle Might also be a closure
+     * @param bool $caseSensitive Whether strings should be compared case-sensitive
+     *
+     * @return bool
+     */
+    public static function contains($traversable, $needle, $caseSensitive = true)
+    {
+        return self::find($traversable, $needle, $caseSensitive)[0] !== null;
+    }
+
+    /**
+     * Search in the traversable for the given needle and return its key and value
+     *
+     * @param array|iterable $traversable
+     * @param mixed $needle Might also be a closure
+     * @param bool $caseSensitive Whether strings should be compared case-sensitive
+     *
+     * @return array An array with two entries, the first is the key, then the value. Both are null if nothing is found.
+     */
+    public static function find($traversable, $needle, $caseSensitive = true)
+    {
+        $usesCallback = is_callable($needle);
+        if (! $usesCallback && $caseSensitive && is_array($traversable)) {
+            return [array_search($needle, $traversable, true), $needle];
+        }
+
+        if (! $caseSensitive && is_string($needle) && ! $usesCallback) {
+            $needle = strtolower($needle);
+        }
+
+        foreach ($traversable as $key => $item) {
+            $originalItem = $item;
+            if (! $caseSensitive && is_string($item)) {
+                $item = strtolower($item);
+            }
+
+            if ($usesCallback && $needle($item)) {
+                return [$key, $originalItem];
+            } elseif ($item === $needle) {
+                return [$key, $originalItem];
+            }
+        }
+
+        return [null, null];
+    }
+
+    /**
+     * Search in the traversable for the given needle and return its key
+     *
+     * @param array|iterable $traversable
+     * @param mixed $needle Might also be a closure
+     * @param bool $caseSensitive Whether strings should be compared case-sensitive
+     *
+     * @return mixed|null Null if nothing is found
+     */
+    public static function findKey($traversable, $needle, $caseSensitive = true)
+    {
+        return self::find($traversable, $needle, $caseSensitive)[0];
+    }
+
+    /**
+     * Search in the traversable for the given needle and return its value
+     *
+     * @param array|iterable $traversable
+     * @param mixed $needle Might also be a closure
+     * @param bool $caseSensitive Whether strings should be compared case-sensitive
+     *
+     * @return mixed|null Null if nothing is found
+     */
+    public static function findValue($traversable, $needle, $caseSensitive = true)
+    {
+        $usesCallback = is_callable($needle);
+        if (! $usesCallback && $caseSensitive && is_array($traversable)) {
+            return isset($traversable[$needle]) ? $traversable[$needle] : null;
+        }
+
+        if (! $caseSensitive && is_string($needle) && ! $usesCallback) {
+            $needle = strtolower($needle);
+        }
+
+        foreach ($traversable as $key => $item) {
+            if (! $caseSensitive && is_string($key)) {
+                $key = strtolower($key);
+            }
+
+            if ($usesCallback && $needle($key)) {
+                return $item;
+            } elseif ($key === $needle) {
+                return $item;
+            }
+        }
+
+        return null;
+    }
+}
diff --git a/vendor/ipl/stdlib/src/Str.php b/vendor/ipl/stdlib/src/Str.php
new file mode 100644
index 0000000..d46989e
--- /dev/null
+++ b/vendor/ipl/stdlib/src/Str.php
@@ -0,0 +1,93 @@
+<?php
+
+namespace ipl\Stdlib;
+
+/**
+ * Collection of string manipulation functions
+ */
+class Str
+{
+    /**
+     * Convert the given string to camel case
+     *
+     * The given string may be delimited by the following characters: '_' (underscore), '-' (dash), ' ' (space).
+     *
+     * @param string $subject
+     *
+     * @return string
+     */
+    public static function camel($subject)
+    {
+        if ($subject === null) {
+            return '';
+        }
+
+        $normalized = str_replace(['-', '_'], ' ', $subject);
+
+        return lcfirst(str_replace(' ', '', ucwords(strtolower($normalized))));
+    }
+
+    /**
+     * Check if the given string starts with the specified substring
+     *
+     * @param string $subject
+     * @param string $start
+     * @param bool   $caseSensitive
+     *
+     * @return bool
+     */
+    public static function startsWith($subject, string $start, bool $caseSensitive = true)
+    {
+        $subject = $subject ?? '';
+        if (! $caseSensitive) {
+            return strncasecmp($subject, $start, strlen($start)) === 0;
+        }
+
+        return substr($subject, 0, strlen($start)) === $start;
+    }
+
+    /**
+     * Split string into an array padded to the size specified by limit
+     *
+     * This method is a perfect fit if you need default values for symmetric array destructuring.
+     *
+     * @param string $subject
+     * @param string $delimiter
+     * @param int    $limit
+     * @param mixed  $default
+     *
+     * @return array
+     */
+    public static function symmetricSplit($subject, string $delimiter, int $limit, $default = null)
+    {
+        if ($subject === null) {
+            return [];
+        }
+
+        return array_pad(explode($delimiter, $subject, $limit), $limit, $default);
+    }
+
+    /**
+     * Split string into an array and trim spaces
+     *
+     * @param string $subject
+     * @param string $delimiter
+     * @param int    $limit
+     *
+     * @return array
+     */
+    public static function trimSplit($subject, string $delimiter = ',', int $limit = null)
+    {
+        if ($subject === null) {
+            return [];
+        }
+
+        if ($limit !== null) {
+            $exploded = explode($delimiter, $subject, $limit);
+        } else {
+            $exploded = explode($delimiter, $subject);
+        }
+
+        return array_map('trim', $exploded);
+    }
+}
diff --git a/vendor/ipl/stdlib/src/functions.php b/vendor/ipl/stdlib/src/functions.php
new file mode 100644
index 0000000..2091c2c
--- /dev/null
+++ b/vendor/ipl/stdlib/src/functions.php
@@ -0,0 +1,71 @@
+<?php
+
+namespace ipl\Stdlib;
+
+use InvalidArgumentException;
+use Traversable;
+use stdClass;
+
+/**
+ * Detect and return the PHP type of the given subject
+ *
+ * If subject is an object, the name of the object's class is returned, otherwise the subject's type.
+ *
+ * @param $subject
+ *
+ * @return string
+ */
+function get_php_type($subject)
+{
+    if (is_object($subject)) {
+        return get_class($subject);
+    } else {
+        return gettype($subject);
+    }
+}
+
+/**
+ * Get the array value of the given subject
+ *
+ * @param array|object|Traversable $subject
+ *
+ * @return array
+ *
+ * @throws InvalidArgumentException If subject type is invalid
+ */
+function arrayval($subject)
+{
+    if (is_array($subject)) {
+        return $subject;
+    }
+
+    if ($subject instanceof stdClass) {
+        return (array) $subject;
+    }
+
+    if ($subject instanceof Traversable) {
+        // Works for generators too
+        return iterator_to_array($subject);
+    }
+
+    throw new InvalidArgumentException(sprintf(
+        'arrayval expects arrays, objects or instances of Traversable. Got %s instead.',
+        get_php_type($subject)
+    ));
+}
+
+/**
+ * Get the first key of an iterable
+ *
+ * @param iterable $iterable
+ *
+ * @return mixed The first key of the iterable if it is not empty, null otherwise
+ */
+function iterable_key_first($iterable)
+{
+    foreach ($iterable as $key => $_) {
+        return $key;
+    }
+
+    return null;
+}
diff --git a/vendor/ipl/stdlib/src/functions_include.php b/vendor/ipl/stdlib/src/functions_include.php
new file mode 100644
index 0000000..9a2dc6f
--- /dev/null
+++ b/vendor/ipl/stdlib/src/functions_include.php
@@ -0,0 +1,6 @@
+<?php
+
+// Don't redefine the functions if included multiple times
+if (! function_exists('ipl\Stdlib\get_php_type')) {
+    require __DIR__ . '/functions.php';
+}