Magento - Enable HTML links in error/custom messages - php

Question

I want to know if this is possible to enable HTML links in custom messages (ie: error messages).
Here is my example:
I've made an override for my needs of Mage_CatalogInventory_Model_Stock_Item/Item.php
Function checkQuoteItemQty :
if (!$this->checkQty($summaryQty) || !$this->checkQty($qty)) {
//$message = Mage::helper('cataloginventory')->__('The requested quantity for "%s" is not available.', $this->getProductName());
$message = Mage::helper('cataloginventory')->__('The requested quantity for "%s" is not available (max:%s).', $this->getProductName(), ($this->getQty() * 1));
$cat_id = $this->getProduct()->getCategoryIds();
if($cat_id){
$url = Mage::getModel('catalog/category')->load($cat_id[0])->getUrl();
$message .= Mage::helper('cataloginventory')->__('You might be interested in those products.', $url);
}
$result->setHasError(true)
->setMessage($message)
->setQuoteMessage($message)
->setQuoteMessageIndex('qty');
return $result;
}
But the HTML link I created in $message is not clickable and considered as text (because of the translation I guess...).
Is it possible to change this behavior?
Regards.

Answer 1

For those who would like to know, I had to override Mage_Core_Block_Messages, line 249 :
public function getGroupedHtml()
{
$types = array(
Mage_Core_Model_Message::ERROR,
Mage_Core_Model_Message::WARNING,
Mage_Core_Model_Message::NOTICE,
Mage_Core_Model_Message::SUCCESS
);
$html = '';
foreach ($types as $type) {
if ( $messages = $this->getMessages($type) ) {
if ( !$html ) {
$html .= '<' . $this->_messagesFirstLevelTagName . ' class="messages">';
}
$html .= '<' . $this->_messagesSecondLevelTagName . ' class="' . $type . '-msg">';
$html .= '<' . $this->_messagesFirstLevelTagName . '>';
foreach ( $messages as $message ) {
$html.= '<' . $this->_messagesSecondLevelTagName . '>';
$html.= '<' . $this->_messagesContentWrapperTagName . '>';
$html.= ($this->_escapeMessageFlag) ? $this->escapeHtml($message->getText()) : html_entity_decode($message->getText());
$html.= '</' . $this->_messagesContentWrapperTagName . '>';
$html.= '</' . $this->_messagesSecondLevelTagName . '>';
}
$html .= '</' . $this->_messagesFirstLevelTagName . '>';
$html .= '</' . $this->_messagesSecondLevelTagName . '>';
}
}
if ( $html) {
$html .= '</' . $this->_messagesFirstLevelTagName . '>';
}
return $html;
}
Adding a html_entity_decode at this line :
$html.= ($this->_escapeMessageFlag) ? $this->escapeHtml($message->getText()) : html_entity_decode($message->getText());
Just let me know if you find a better solution.

Answer 2

I'm not sure why, but in my case, by calling the obsolete method without "Message" solves the issue with the link.
Instead of using addNoticeMessage, I changed to addNotice, and the links appeared.
In my case:
$noticeMsg = __('You must be logged in or registered to purchase these products.',
$this->_storeManager->getStore()->getUrl('customer/account/login'),
$this->_storeManager->getStore()->getUrl('customer/account/create')
);
$this->_messageManager->addNotice($noticeMsg);