From a441bed2a234a10137f1f7126bb7e179aa25960d Mon Sep 17 00:00:00 2001
From: Dmitriy Simushev <simushevds@ossg.ru>
Date: Tue, 16 Dec 2014 16:00:20 +0000
Subject: [PATCH] Move common helpers to a separate composer package

---
 src/composer.json                             |  1 +
 .../classes/Mibew/Handlebars/BlockStorage.php | 77 -----------------
 .../Handlebars/Helper/AbstractBlockHelper.php | 43 ----------
 .../Mibew/Handlebars/Helper/BlockHelper.php   | 60 -------------
 .../Handlebars/Helper/CutStringHelper.php     | 53 ------------
 .../Mibew/Handlebars/Helper/ExtendsHelper.php | 68 ---------------
 .../Mibew/Handlebars/Helper/IfAnyHelper.php   | 84 -------------------
 .../Mibew/Handlebars/Helper/IfEqualHelper.php | 67 ---------------
 .../Mibew/Handlebars/Helper/IfEvenHelper.php  | 67 ---------------
 .../Mibew/Handlebars/Helper/IfOddHelper.php   | 67 ---------------
 .../Handlebars/Helper/IfOverriddenHelper.php  | 68 ---------------
 .../Handlebars/Helper/OverrideHelper.php      | 66 ---------------
 .../Mibew/Handlebars/Helper/RepeatHelper.php  | 53 ------------
 .../Mibew/Handlebars/Helper/ReplaceHelper.php | 54 ------------
 .../Helper/UnlessOverriddenHelper.php         | 68 ---------------
 .../libs/classes/Mibew/Handlebars/Helpers.php | 29 ++++---
 16 files changed, 17 insertions(+), 908 deletions(-)
 delete mode 100644 src/mibew/libs/classes/Mibew/Handlebars/BlockStorage.php
 delete mode 100644 src/mibew/libs/classes/Mibew/Handlebars/Helper/AbstractBlockHelper.php
 delete mode 100644 src/mibew/libs/classes/Mibew/Handlebars/Helper/BlockHelper.php
 delete mode 100644 src/mibew/libs/classes/Mibew/Handlebars/Helper/CutStringHelper.php
 delete mode 100644 src/mibew/libs/classes/Mibew/Handlebars/Helper/ExtendsHelper.php
 delete mode 100644 src/mibew/libs/classes/Mibew/Handlebars/Helper/IfAnyHelper.php
 delete mode 100644 src/mibew/libs/classes/Mibew/Handlebars/Helper/IfEqualHelper.php
 delete mode 100644 src/mibew/libs/classes/Mibew/Handlebars/Helper/IfEvenHelper.php
 delete mode 100644 src/mibew/libs/classes/Mibew/Handlebars/Helper/IfOddHelper.php
 delete mode 100644 src/mibew/libs/classes/Mibew/Handlebars/Helper/IfOverriddenHelper.php
 delete mode 100644 src/mibew/libs/classes/Mibew/Handlebars/Helper/OverrideHelper.php
 delete mode 100644 src/mibew/libs/classes/Mibew/Handlebars/Helper/RepeatHelper.php
 delete mode 100644 src/mibew/libs/classes/Mibew/Handlebars/Helper/ReplaceHelper.php
 delete mode 100644 src/mibew/libs/classes/Mibew/Handlebars/Helper/UnlessOverriddenHelper.php

diff --git a/src/composer.json b/src/composer.json
index 4d0b920f..f36a1c5a 100644
--- a/src/composer.json
+++ b/src/composer.json
@@ -19,6 +19,7 @@
     },
     "require": {
         "xamin/handlebars.php": "0.10.*",
+        "justblackbird/handlebars.php-helpers": "~0.2.1",
         "symfony/http-foundation": "2.6.*",
         "symfony/routing": "2.6.*",
         "symfony/config": "2.6.*",
diff --git a/src/mibew/libs/classes/Mibew/Handlebars/BlockStorage.php b/src/mibew/libs/classes/Mibew/Handlebars/BlockStorage.php
deleted file mode 100644
index 3d6a7a98..00000000
--- a/src/mibew/libs/classes/Mibew/Handlebars/BlockStorage.php
+++ /dev/null
@@ -1,77 +0,0 @@
-<?php
-/*
- * This file is a part of Mibew Messenger.
- *
- * Copyright 2005-2014 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-namespace Mibew\Handlebars;
-
-/**
- * A storage for overridable blocks' content.
- */
-class BlockStorage
-{
-    /**
-     * Associative array of blocks. The keys are blocks names and the values are
-     * blocks content.
-     *
-     * @type string[]
-     */
-    protected $blocks = array();
-
-    /**
-     * Gets content of a block.
-     *
-     * @param string $name Block's name.
-     * @return string Block's content.
-     */
-    public function get($name)
-    {
-        return isset($this->blocks[$name]) ? $this->blocks[$name] : false;
-    }
-
-    /**
-     * Sets content of a block.
-     *
-     * @param string $name Block's name.
-     * @param string $content Block's content.
-     */
-    public function set($name, $content)
-    {
-        $this->blocks[$name] = $content;
-    }
-
-    /**
-     * Checks if a block exists in the storage.
-     *
-     * @param string $name Block's name
-     * @return boolean
-     */
-    public function has($name)
-    {
-        return isset($this->blocks[$name]);
-    }
-
-    /**
-     * Removes block from the storage.
-     *
-     * @param string $name Block's name.
-     */
-    public function remove($name)
-    {
-        unset($this->blocks[$name]);
-    }
-}
diff --git a/src/mibew/libs/classes/Mibew/Handlebars/Helper/AbstractBlockHelper.php b/src/mibew/libs/classes/Mibew/Handlebars/Helper/AbstractBlockHelper.php
deleted file mode 100644
index 4c9c2692..00000000
--- a/src/mibew/libs/classes/Mibew/Handlebars/Helper/AbstractBlockHelper.php
+++ /dev/null
@@ -1,43 +0,0 @@
-<?php
-/*
- * This file is a part of Mibew Messenger.
- *
- * Copyright 2005-2014 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-namespace Mibew\Handlebars\Helper;
-
-use Mibew\Handlebars\BlockStorage;
-
-/**
- * Contains base functionality for all helpers related with blocks overriding.
- */
-abstract class AbstractBlockHelper
-{
-    /**
-     * @var BlockStorage
-     */
-    protected $blocksStorage;
-
-    /**
-     * Helper's constructor.
-     *
-     * @param BlockStorage $storage A Blocks context instance
-     */
-    public function __construct(BlockStorage $storage)
-    {
-        $this->blocksStorage = $storage;
-    }
-}
diff --git a/src/mibew/libs/classes/Mibew/Handlebars/Helper/BlockHelper.php b/src/mibew/libs/classes/Mibew/Handlebars/Helper/BlockHelper.php
deleted file mode 100644
index 0d8c6684..00000000
--- a/src/mibew/libs/classes/Mibew/Handlebars/Helper/BlockHelper.php
+++ /dev/null
@@ -1,60 +0,0 @@
-<?php
-/*
- * This file is a part of Mibew Messenger.
- *
- * Copyright 2005-2014 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-namespace Mibew\Handlebars\Helper;
-
-use Handlebars\Context;
-use Handlebars\Helper as HelperInterface;
-use Handlebars\Template;
-
-/**
- * A helper for defining default content of a block.
- *
- * Example of usage:
- * <code>
- *   {{#block "blockName"}}
- *     Default content for the block
- *   {{/block}}
- * </code>
- */
-class BlockHelper extends AbstractBlockHelper implements HelperInterface
-{
-    /**
-     * {@inheritdoc}
-     */
-    public function execute(Template $template, Context $context, $args, $source)
-    {
-        // Get block name
-        $parsed_args = $template->parseArguments($args);
-        if (count($parsed_args) != 1) {
-            throw new \InvalidArgumentException(
-                '"block" helper expects exactly one argument.'
-            );
-        }
-        $block_name = $context->get(array_shift($parsed_args));
-
-        // If the block is not overridden render and show the default value
-        if (!$this->blocksStorage->has($block_name)) {
-            return $template->render($context);
-        }
-
-        // Show overridden content
-        return $this->blocksStorage->get($block_name);
-    }
-}
diff --git a/src/mibew/libs/classes/Mibew/Handlebars/Helper/CutStringHelper.php b/src/mibew/libs/classes/Mibew/Handlebars/Helper/CutStringHelper.php
deleted file mode 100644
index 6863876c..00000000
--- a/src/mibew/libs/classes/Mibew/Handlebars/Helper/CutStringHelper.php
+++ /dev/null
@@ -1,53 +0,0 @@
-<?php
-/*
- * This file is a part of Mibew Messenger.
- *
- * Copyright 2005-2014 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-namespace Mibew\Handlebars\Helper;
-
-use Handlebars\Context;
-use Handlebars\Helper as HelperInterface;
-use Handlebars\Template;
-
-/**
- * Cut string if it exceeds specified length.
- *
- * Example of usage:
- * <code>
- *   {{cutString string length}}
- * </code>
- */
-class CutStringHelper implements HelperInterface
-{
-    /**
-     * {@inheritdoc}
-     */
-    public function execute(Template $template, Context $context, $args, $source)
-    {
-        $parsed_args = $template->parseArguments($args);
-        if (count($parsed_args) != 2) {
-            throw new \InvalidArgumentException(
-                '"cutString" helper expects exactly two arguments.'
-            );
-        }
-
-        $string = $context->get($parsed_args[0]);
-        $length = intval($context->get($parsed_args[1]));
-
-        return substr($string, 0, $length);
-    }
-}
diff --git a/src/mibew/libs/classes/Mibew/Handlebars/Helper/ExtendsHelper.php b/src/mibew/libs/classes/Mibew/Handlebars/Helper/ExtendsHelper.php
deleted file mode 100644
index 9f40c86b..00000000
--- a/src/mibew/libs/classes/Mibew/Handlebars/Helper/ExtendsHelper.php
+++ /dev/null
@@ -1,68 +0,0 @@
-<?php
-/*
- * This file is a part of Mibew Messenger.
- *
- * Copyright 2005-2014 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-namespace Mibew\Handlebars\Helper;
-
-use Handlebars\Context;
-use Handlebars\Helper as HelperInterface;
-use Handlebars\Template;
-
-/**
- * A helper for templates inheritance.
- *
- * Example of usage:
- * <code>
- *   {{#extends "parentTemplateName"}}
- *     {{#override "blockName"}}
- *       Overridden first block
- *     {{/override}}
- *
- *     {{#override "anotherBlockName"}}
- *       Overridden second block
- *     {{/override}}
- *   {{/extends}}
- * </code>
- */
-class ExtendsHelper implements HelperInterface
-{
-    /**
-     * {@inheritdoc}
-     */
-    public function execute(Template $template, Context $context, $args, $source)
-    {
-        // Get name of the parent template
-        $parsed_args = $template->parseArguments($args);
-        if (count($parsed_args) != 1) {
-            throw new \InvalidArgumentException(
-                '"extends" helper expects exactly one argument.'
-            );
-        }
-        $parent_template = $context->get(array_shift($parsed_args));
-
-        // Render content inside "extends" block to override blocks
-        $template->render($context);
-
-        // We need another instance of \Handlebars\Template to render parent
-        // template. It can be got from Handlebars engine, so get the engine.
-        $handlebars = $template->getEngine();
-
-        // Render the parent template
-        return $handlebars->render($parent_template, $context);
-    }
-}
diff --git a/src/mibew/libs/classes/Mibew/Handlebars/Helper/IfAnyHelper.php b/src/mibew/libs/classes/Mibew/Handlebars/Helper/IfAnyHelper.php
deleted file mode 100644
index fe9af273..00000000
--- a/src/mibew/libs/classes/Mibew/Handlebars/Helper/IfAnyHelper.php
+++ /dev/null
@@ -1,84 +0,0 @@
-<?php
-/*
- * This file is a part of Mibew Messenger.
- *
- * Copyright 2005-2014 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-namespace Mibew\Handlebars\Helper;
-
-use Handlebars\Context;
-use Handlebars\Helper as HelperInterface;
-use Handlebars\String;
-use Handlebars\Template;
-
-/**
- * Conditional helper that checks if at least one argumet can be treated as
- * "true" value.
- *
- * Example of usage:
- * <code>
- *   {{#ifAny first second third}}
- *     At least one of argument can be threated as "true".
- *   {{else}}
- *     All values are "falsy"
- *   {{/ifAny}}
- * </code>
- */
-class IfAnyHelper implements HelperInterface
-{
-    /**
-     * {@inheritdoc}
-     */
-    public function execute(Template $template, Context $context, $args, $source)
-    {
-        $parsed_args = $template->parseArguments($args);
-        if (count($parsed_args) == 0) {
-            throw new \InvalidArgumentException(
-                '"ifAny" helper expects at least one argument.'
-            );
-        }
-
-        $condition = false;
-        foreach ($parsed_args as $parsed_arg) {
-            $value = $context->get($parsed_arg);
-
-            if ($value instanceof String) {
-                // We need to get internal string. Casting any object of
-                // \Handlebars\String will have positive result even for those
-                // with empty internal strings.
-                $value = $value->getString();
-            }
-
-            if ($value) {
-                $condition = true;
-                break;
-            }
-        }
-
-        if ($condition) {
-            $template->setStopToken('else');
-            $buffer = $template->render($context);
-            $template->setStopToken(false);
-        } else {
-            $template->setStopToken('else');
-            $template->discard();
-            $template->setStopToken(false);
-            $buffer = $template->render($context);
-        }
-
-        return $buffer;
-    }
-}
diff --git a/src/mibew/libs/classes/Mibew/Handlebars/Helper/IfEqualHelper.php b/src/mibew/libs/classes/Mibew/Handlebars/Helper/IfEqualHelper.php
deleted file mode 100644
index 99db9855..00000000
--- a/src/mibew/libs/classes/Mibew/Handlebars/Helper/IfEqualHelper.php
+++ /dev/null
@@ -1,67 +0,0 @@
-<?php
-/*
- * This file is a part of Mibew Messenger.
- *
- * Copyright 2005-2014 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-namespace Mibew\Handlebars\Helper;
-
-use Handlebars\Context;
-use Handlebars\Helper as HelperInterface;
-use Handlebars\Template;
-
-/**
- * Conditional helper that checks if two values are equal or not.
- *
- * Example of usage:
- * <code>
- *   {{#ifEqual first second}}
- *     The first argument is equal to the second one.
- *   {{else}}
- *     The arguments are not equal.
- *   {{/ifEqual}}
- * </code>
- */
-class IfEqualHelper implements HelperInterface
-{
-    /**
-     * {@inheritdoc}
-     */
-    public function execute(Template $template, Context $context, $args, $source)
-    {
-        $parsed_args = $template->parseArguments($args);
-        if (count($parsed_args) != 2) {
-            throw new \InvalidArgumentException(
-                '"ifEqual" helper expects exactly two arguments.'
-            );
-        }
-
-        $condition = ($context->get($parsed_args[0]) == $context->get($parsed_args[1]));
-
-        if ($condition) {
-            $template->setStopToken('else');
-            $buffer = $template->render($context);
-            $template->setStopToken(false);
-        } else {
-            $template->setStopToken('else');
-            $template->discard();
-            $template->setStopToken(false);
-            $buffer = $template->render($context);
-        }
-
-        return $buffer;
-    }
-}
diff --git a/src/mibew/libs/classes/Mibew/Handlebars/Helper/IfEvenHelper.php b/src/mibew/libs/classes/Mibew/Handlebars/Helper/IfEvenHelper.php
deleted file mode 100644
index c63a4ec8..00000000
--- a/src/mibew/libs/classes/Mibew/Handlebars/Helper/IfEvenHelper.php
+++ /dev/null
@@ -1,67 +0,0 @@
-<?php
-/*
- * This file is a part of Mibew Messenger.
- *
- * Copyright 2005-2014 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-namespace Mibew\Handlebars\Helper;
-
-use Handlebars\Context;
-use Handlebars\Helper as HelperInterface;
-use Handlebars\Template;
-
-/**
- * Conditional helper that checks if specified argument is even or not.
- *
- * Example of usage:
- * <code>
- *   {{#ifEven value}}
- *     The value is even.
- *   {{else}}
- *     The value is odd.
- *   {{/ifEven}}
- * </code>
- */
-class IfEvenHelper implements HelperInterface
-{
-    /**
-     * {@inheritdoc}
-     */
-    public function execute(Template $template, Context $context, $args, $source)
-    {
-        $parsed_args = $template->parseArguments($args);
-        if (count($parsed_args) != 1) {
-            throw new \InvalidArgumentException(
-                '"ifEven" helper expects exactly one argument.'
-            );
-        }
-
-        $condition = ($context->get($parsed_args[0]) % 2 == 0);
-
-        if ($condition) {
-            $template->setStopToken('else');
-            $buffer = $template->render($context);
-            $template->setStopToken(false);
-        } else {
-            $template->setStopToken('else');
-            $template->discard();
-            $template->setStopToken(false);
-            $buffer = $template->render($context);
-        }
-
-        return $buffer;
-    }
-}
diff --git a/src/mibew/libs/classes/Mibew/Handlebars/Helper/IfOddHelper.php b/src/mibew/libs/classes/Mibew/Handlebars/Helper/IfOddHelper.php
deleted file mode 100644
index c4d6c06a..00000000
--- a/src/mibew/libs/classes/Mibew/Handlebars/Helper/IfOddHelper.php
+++ /dev/null
@@ -1,67 +0,0 @@
-<?php
-/*
- * This file is a part of Mibew Messenger.
- *
- * Copyright 2005-2014 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-namespace Mibew\Handlebars\Helper;
-
-use Handlebars\Context;
-use Handlebars\Helper as HelperInterface;
-use Handlebars\Template;
-
-/**
- * Conditional helper that checks if specified argument is odd or not.
- *
- * Example of usage:
- * <code>
- *   {{#ifOdd value}}
- *     The value is odd.
- *   {{else}}
- *     The value is even.
- *   {{/ifOdd}}
- * </code>
- */
-class IfOddHelper implements HelperInterface
-{
-    /**
-     * {@inheritdoc}
-     */
-    public function execute(Template $template, Context $context, $args, $source)
-    {
-        $parsed_args = $template->parseArguments($args);
-        if (count($parsed_args) != 1) {
-            throw new \InvalidArgumentException(
-                '"ifOdd" helper expects exactly one argument.'
-            );
-        }
-
-        $condition = ($context->get($parsed_args[0]) % 2 == 1);
-
-        if ($condition) {
-            $template->setStopToken('else');
-            $buffer = $template->render($context);
-            $template->setStopToken(false);
-        } else {
-            $template->setStopToken('else');
-            $template->discard();
-            $template->setStopToken(false);
-            $buffer = $template->render($context);
-        }
-
-        return $buffer;
-    }
-}
diff --git a/src/mibew/libs/classes/Mibew/Handlebars/Helper/IfOverriddenHelper.php b/src/mibew/libs/classes/Mibew/Handlebars/Helper/IfOverriddenHelper.php
deleted file mode 100644
index d62cd413..00000000
--- a/src/mibew/libs/classes/Mibew/Handlebars/Helper/IfOverriddenHelper.php
+++ /dev/null
@@ -1,68 +0,0 @@
-<?php
-/*
- * This file is a part of Mibew Messenger.
- *
- * Copyright 2005-2014 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-namespace Mibew\Handlebars\Helper;
-
-use Handlebars\Context;
-use Handlebars\Helper as HelperInterface;
-use Handlebars\Template;
-
-/**
- * Conditional helper that checks if block overridden or not.
- *
- * Example of usage:
- * <code>
- *   {{#ifOverridden "blockName"}}
- *     The block was overridden
- *   {{else}}
- *     The block was not overridden
- *   {{/ifOverridden}}
- * </code>
- */
-class IfOverriddenHelper extends AbstractBlockHelper implements HelperInterface
-{
-    /**
-     * {@inheritdoc}
-     */
-    public function execute(Template $template, Context $context, $args, $source)
-    {
-        // Get block name
-        $parsed_args = $template->parseArguments($args);
-        if (count($parsed_args) != 1) {
-            throw new \InvalidArgumentException(
-                '"ifOverridden" helper expects exactly one argument.'
-            );
-        }
-        $block_name = $context->get(array_shift($parsed_args));
-
-        // Check condition and render blocks
-        if ($this->blocksStorage->has($block_name)) {
-            $template->setStopToken('else');
-            $buffer = $template->render($context);
-            $template->setStopToken(false);
-        } else {
-            $template->setStopToken('else');
-            $template->discard();
-            $template->setStopToken(false);
-            $buffer = $template->render($context);
-        }
-
-        return $buffer;
-    }
-}
diff --git a/src/mibew/libs/classes/Mibew/Handlebars/Helper/OverrideHelper.php b/src/mibew/libs/classes/Mibew/Handlebars/Helper/OverrideHelper.php
deleted file mode 100644
index 71595b7a..00000000
--- a/src/mibew/libs/classes/Mibew/Handlebars/Helper/OverrideHelper.php
+++ /dev/null
@@ -1,66 +0,0 @@
-<?php
-/*
- * This file is a part of Mibew Messenger.
- *
- * Copyright 2005-2014 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-namespace Mibew\Handlebars\Helper;
-
-use Handlebars\Context;
-use Handlebars\Helper as HelperInterface;
-use Handlebars\Template;
-
-/**
- * A helper for overriding content of a block.
- *
- * Example of usage:
- * <code>
- *   {{#extends "parentTemplateName"}}
- *     {{#override "blockName"}}
- *       Overridden first block
- *     {{/override}}
- *
- *     {{#override "anotherBlockName"}}
- *       Overridden second block
- *     {{/override}}
- *   {{/extends}}
- * </code>
- */
-class OverrideHelper extends AbstractBlockHelper implements HelperInterface
-{
-    /**
-     * {@inheritdoc}
-     */
-    public function execute(Template $template, Context $context, $args, $source)
-    {
-        // Get block name
-        $parsed_args = $template->parseArguments($args);
-        if (count($parsed_args) != 1) {
-            throw new \InvalidArgumentException(
-                '"override" helper expects exactly one argument.'
-            );
-        }
-        $block_name = $context->get(array_shift($parsed_args));
-
-        // We need to provide unlimited inheritence level. Rendering is started
-        // from the deepest level template. If the content is in the block
-        // storage it is related with the deepest level template. Thus we do not
-        // need to override it.
-        if (!$this->blocksStorage->has($block_name)) {
-            $this->blocksStorage->set($block_name, $template->render($context));
-        }
-    }
-}
diff --git a/src/mibew/libs/classes/Mibew/Handlebars/Helper/RepeatHelper.php b/src/mibew/libs/classes/Mibew/Handlebars/Helper/RepeatHelper.php
deleted file mode 100644
index 489eb905..00000000
--- a/src/mibew/libs/classes/Mibew/Handlebars/Helper/RepeatHelper.php
+++ /dev/null
@@ -1,53 +0,0 @@
-<?php
-/*
- * This file is a part of Mibew Messenger.
- *
- * Copyright 2005-2014 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-namespace Mibew\Handlebars\Helper;
-
-use Handlebars\Context;
-use Handlebars\Helper as HelperInterface;
-use Handlebars\Template;
-
-/**
- * Helper for repeating content.
- *
- * Example of usage:
- * <code>
- *   {{#repeat times}}content to repeat{{/repeat}}
- * </code>
- */
-class RepeatHelper implements HelperInterface
-{
-    /**
-     * {@inheritdoc}
-     */
-    public function execute(Template $template, Context $context, $args, $source)
-    {
-        $parsed_args = $template->parseArguments($args);
-        if (count($parsed_args) != 1) {
-            throw new \InvalidArgumentException(
-                '"repeat" helper expects exactly one argument.'
-            );
-        }
-
-        $times = intval($context->get($parsed_args[0]));
-        $string = $template->render($context);
-
-        return str_repeat($string, $times);
-    }
-}
diff --git a/src/mibew/libs/classes/Mibew/Handlebars/Helper/ReplaceHelper.php b/src/mibew/libs/classes/Mibew/Handlebars/Helper/ReplaceHelper.php
deleted file mode 100644
index ac7178f8..00000000
--- a/src/mibew/libs/classes/Mibew/Handlebars/Helper/ReplaceHelper.php
+++ /dev/null
@@ -1,54 +0,0 @@
-<?php
-/*
- * This file is a part of Mibew Messenger.
- *
- * Copyright 2005-2014 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-namespace Mibew\Handlebars\Helper;
-
-use Handlebars\Context;
-use Handlebars\Helper as HelperInterface;
-use Handlebars\Template;
-
-/**
- * Helper for replacing substrings.
- *
- * Example of usage:
- * <code>
- *   {{#replace search replacement}}target content{{/replace}}
- * </code>
- */
-class ReplaceHelper implements HelperInterface
-{
-    /**
-     * {@inheritdoc}
-     */
-    public function execute(Template $template, Context $context, $args, $source)
-    {
-        $parsed_args = $template->parseArguments($args);
-        if (count($parsed_args) != 2) {
-            throw new \InvalidArgumentException(
-                '"replace" helper expects exactly two arguments.'
-            );
-        }
-
-        $search = $context->get($parsed_args[0]);
-        $replacement = $context->get($parsed_args[1]);
-        $subject = $template->render($context);
-
-        return str_replace($search, $replacement, $subject);
-    }
-}
diff --git a/src/mibew/libs/classes/Mibew/Handlebars/Helper/UnlessOverriddenHelper.php b/src/mibew/libs/classes/Mibew/Handlebars/Helper/UnlessOverriddenHelper.php
deleted file mode 100644
index e3b4c00e..00000000
--- a/src/mibew/libs/classes/Mibew/Handlebars/Helper/UnlessOverriddenHelper.php
+++ /dev/null
@@ -1,68 +0,0 @@
-<?php
-/*
- * This file is a part of Mibew Messenger.
- *
- * Copyright 2005-2014 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-namespace Mibew\Handlebars\Helper;
-
-use Handlebars\Context;
-use Handlebars\Helper as HelperInterface;
-use Handlebars\Template;
-
-/**
- * Conditional helper that checks if block overridden or not.
- *
- * Example of usage:
- * <code>
- *   {{#unlessOverridden "blockName"}}
- *     The block was not overridden
- *   {{else}}
- *     The block was overridden
- *   {{/unlessOverridden}}
- * </code>
- */
-class UnlessOverriddenHelper extends AbstractBlockHelper implements HelperInterface
-{
-    /**
-     * {@inheritdoc}
-     */
-    public function execute(Template $template, Context $context, $args, $source)
-    {
-        // Get block name
-        $parsed_args = $template->parseArguments($args);
-        if (count($parsed_args) != 1) {
-            throw new \InvalidArgumentException(
-                '"unlessOverridden" helper expects exactly one argument.'
-            );
-        }
-        $block_name = $context->get(array_shift($parsed_args));
-
-        // Check condition and render blocks
-        if (!$this->blocksStorage->has($block_name)) {
-            $template->setStopToken('else');
-            $buffer = $template->render($context);
-            $template->setStopToken(false);
-        } else {
-            $template->setStopToken('else');
-            $template->discard();
-            $template->setStopToken(false);
-            $buffer = $template->render($context);
-        }
-
-        return $buffer;
-    }
-}
diff --git a/src/mibew/libs/classes/Mibew/Handlebars/Helpers.php b/src/mibew/libs/classes/Mibew/Handlebars/Helpers.php
index 5c856775..95f5bdb4 100644
--- a/src/mibew/libs/classes/Mibew/Handlebars/Helpers.php
+++ b/src/mibew/libs/classes/Mibew/Handlebars/Helpers.php
@@ -20,6 +20,7 @@
 namespace Mibew\Handlebars;
 
 use Handlebars\Helpers as BaseHelpers;
+use JustBlackBird\HandlebarsHelpers;
 
 /**
  * Handlebars helpers collection.
@@ -35,23 +36,25 @@ class Helpers extends BaseHelpers
     {
         parent::addDefaultHelpers();
 
-        $blocks = new BlockStorage();
         $this->add('l10n', new Helper\L10nHelper());
-        $this->add('extends', new Helper\ExtendsHelper());
-        $this->add('block', new Helper\BlockHelper($blocks));
-        $this->add('override', new Helper\OverrideHelper($blocks));
-        $this->add('ifOverridden', new Helper\IfOverriddenHelper($blocks));
-        $this->add('unlessOverridden', new Helper\UnlessOverriddenHelper($blocks));
-        $this->add('ifEqual', new Helper\IfEqualHelper());
-        $this->add('ifAny', new Helper\IfAnyHelper());
-        $this->add('ifEven', new Helper\IfEvenHelper());
-        $this->add('ifOdd', new Helper\IfOddHelper());
         $this->add('generatePagination', new Helper\GeneratePaginationHelper());
-        $this->add('repeat', new Helper\RepeatHelper());
-        $this->add('replace', new Helper\ReplaceHelper());
         $this->add('formatDate', new Helper\FormatDateHelper());
         $this->add('formatDateDiff', new Helper\FormatDateDiffHelper());
-        $this->add('cutString', new Helper\CutStringHelper());
         $this->add('csrfTokenInput', new Helper\CsrfTokenInputHelper());
+
+        // Use third party helpers
+        $this->add('ifEqual', new HandlebarsHelpers\Comparison\IfEqualHelper());
+        $this->add('ifAny', new HandlebarsHelpers\Comparison\IfAnyHelper());
+        $this->add('ifEven', new HandlebarsHelpers\Comparison\IfEvenHelper());
+        $this->add('ifOdd', new HandlebarsHelpers\Comparison\IfOddHelper());
+        $this->add('repeat', new HandlebarsHelpers\String\RepeatHelper());
+        $this->add('replace', new HandlebarsHelpers\String\ReplaceHelper());
+        $this->add('cutString', new HandlebarsHelpers\String\TruncateHelper());
+        $blocks = new HandlebarsHelpers\Layout\BlockStorage();
+        $this->add('extends', new HandlebarsHelpers\Layout\ExtendsHelper($blocks));
+        $this->add('block', new HandlebarsHelpers\Layout\BlockHelper($blocks));
+        $this->add('override', new HandlebarsHelpers\Layout\OverrideHelper($blocks));
+        $this->add('ifOverridden', new HandlebarsHelpers\Layout\IfOverriddenHelper($blocks));
+        $this->add('unlessOverridden', new HandlebarsHelpers\Layout\UnlessOverriddenHelper($blocks));
     }
 }