<?php
header('content-type: application/json; charset=utf-8');

$definition = array(
        'msg' => new ezcInputFormDefinitionElement(
            ezcInputFormDefinitionElement::REQUIRED, 'unsafe_raw'
        )
);

$form = new ezcInputForm( INPUT_POST, $definition );
$r = '';
$error = 'f';

if ($form->hasValidData( 'msg' ) && trim($form->msg) != '' && trim(str_replace('[[msgitm]]', '',$form->msg)) != '' && mb_strlen($form->msg) < (int)erLhcoreClassModelChatConfig::fetch('max_message_length')->current_value)
{
	try {
	    $db = ezcDbInstance::get();
	     
	    $db->beginTransaction();
	    
	    $chat = erLhcoreClassModelChat::fetchAndLock($Params['user_parameters']['chat_id']);

	    $validStatuses = array(
            erLhcoreClassModelChat::STATUS_PENDING_CHAT,
            erLhcoreClassModelChat::STATUS_ACTIVE_CHAT,
            erLhcoreClassModelChat::STATUS_BOT_CHAT,
        );

        erLhcoreClassChatEventDispatcher::getInstance()->dispatch('chat.validstatus_chat',array('chat' => & $chat, 'valid_statuses' => & $validStatuses));

	    if ($chat->hash == $Params['user_parameters']['hash'] && (in_array($chat->status,$validStatuses)) && !in_array($chat->status_sub, array(erLhcoreClassModelChat::STATUS_SUB_SURVEY_COMPLETED, erLhcoreClassModelChat::STATUS_SUB_USER_CLOSED_CHAT, erLhcoreClassModelChat::STATUS_SUB_SURVEY_SHOW, erLhcoreClassModelChat::STATUS_SUB_CONTACT_FORM))) // Allow add messages only if chat is active
	    {

	        $msgText = preg_replace('/\[html\](.*?)\[\/html\]/ms','',$form->msg);

	        $messagesToStore = explode('[[msgitm]]', trim($msgText));
	        
	        foreach ($messagesToStore as $messageText)
	        {
	            if (trim($messageText) != '')
                {
                    $msg = new erLhcoreClassModelmsg();
                    $msg->msg = trim($messageText);
                    $msg->chat_id = $Params['user_parameters']['chat_id'];
                    $msg->user_id = 0;
                    $msg->time = time();

                    if ($chat->chat_locale != '' && $chat->chat_locale_to != '' && isset($chat->chat_variables_array['lhc_live_trans']) && $chat->chat_variables_array['lhc_live_trans'] === true) {
                        erLhcoreClassTranslate::translateChatMsgVisitor($chat, $msg);
                    }

                    erLhcoreClassChatEventDispatcher::getInstance()->dispatch('chat.before_msg_user_saved',array('msg' => & $msg,'chat' => & $chat));

                    erLhcoreClassChat::getSession()->save($msg);
                }
	        }

	        if (!isset($msg)){
                $error = 't';
                $r = erTranslationClassLhTranslation::getInstance()->getTranslation('chat/startchat','Please enter a message, max characters').' - '.(int)erLhcoreClassModelChatConfig::fetch('max_message_length')->current_value;
                echo erLhcoreClassChat::safe_json_encode(array('error' => $error, 'r' => $r));
                exit;
            }

            if ($chat->gbot_id > 0 && (!isset($chat->chat_variables_array['gbot_disabled']) || $chat->chat_variables_array['gbot_disabled'] == 0)) {
                erLhcoreClassGenericBotWorkflow::userMessageAdded($chat, $msg);
            }

            // Reset active counter if visitor send new message and now user is the last message
            if ($chat->status_sub != erLhcoreClassModelChat::STATUS_SUB_ON_HOLD && $chat->auto_responder !== false) {
                if ($chat->auto_responder->active_send_status != 0 && $chat->last_user_msg_time < $chat->last_op_msg_time) {
                    $chat->auto_responder->active_send_status = 0;
                    $chat->auto_responder->saveThis();
                }
            }

	        $stmt = $db->prepare('UPDATE lh_chat SET last_user_msg_time = :last_user_msg_time, lsync = :lsync, last_msg_id = :last_msg_id, has_unread_messages = :has_unread_messages, unanswered_chat = :unanswered_chat WHERE id = :id');
	        $stmt->bindValue(':id', $chat->id, PDO::PARAM_INT);
	        $stmt->bindValue(':has_unread_messages', ($chat->status == erLhcoreClassModelChat::STATUS_BOT_CHAT ? 0 : 1),PDO::PARAM_INT);
	        $stmt->bindValue(':lsync', time(), PDO::PARAM_INT);
	        $stmt->bindValue(':last_user_msg_time', $msg->time, PDO::PARAM_INT);
	        $stmt->bindValue(':unanswered_chat',($chat->status == erLhcoreClassModelChat::STATUS_PENDING_CHAT ? 1 : 0), PDO::PARAM_INT);

	        // Set last message ID
	        if ($chat->last_msg_id < $msg->id) {	        
	        	$stmt->bindValue(':last_msg_id',$msg->id,PDO::PARAM_INT);
	        } else {
	        	$stmt->bindValue(':last_msg_id',$chat->last_msg_id,PDO::PARAM_INT);
	        }

	        $stmt->execute();
	        	        
	        if ($chat->has_unread_messages == 1 && $chat->last_user_msg_time < (time() - 5)) {
	        	erLhcoreClassChatEventDispatcher::getInstance()->dispatch('chat.unread_chat',array('chat' => & $chat));
	        }

            // Assign to last message all the texts
            $msg->msg = trim(implode("\n", $messagesToStore));

            erLhcoreClassChatEventDispatcher::getInstance()->dispatch('chat.addmsguser',array('chat' => & $chat, 'msg' => & $msg));
	    } else {
	        throw new Exception(erTranslationClassLhTranslation::getInstance()->getTranslation('chat/startchat','You cannot send messages to this chat. Please refresh your browser.'));
        }

	    // Initialize auto responder if required
	    if ($chat->status_sub == erLhcoreClassModelChat::STATUS_SUB_START_ON_KEY_UP)
	    {
	        // Invitation...
	        // We have to apply proactive invitation rules
	        if ($chat->chat_initiator == erLhcoreClassModelChat::CHAT_INITIATOR_PROACTIVE && $chat->online_user !== false && $chat->online_user->invitation !== false) {
	            
	            if ($chat->online_user->invitation->wait_message != '') {
	                $msg = new erLhcoreClassModelmsg();
	                $msg->msg = trim($chat->online_user->invitation->wait_message);
	                $msg->chat_id = $chat->id;
	                $msg->name_support = $chat->online_user->operator_user !== false ? $chat->online_user->operator_user->name_support : (!empty($chat->online_user->operator_user_proactive) ? $chat->online_user->operator_user_proactive : erTranslationClassLhTranslation::getInstance()->getTranslation('chat/startchat','Live Support'));
	                $msg->user_id = $chat->online_user->operator_user_id > 0 ? $chat->online_user->operator_user_id : -2;
	                $msg->time = time()+1;
	                erLhcoreClassChat::getSession()->save($msg);
	            }

	            $chat->status_sub = erLhcoreClassModelChat::STATUS_SUB_DEFAULT;
	            $chat->time = $chat->pnd_time = time(); // Update initial chat start time for auto responder
	            $chat->saveThis();
	            
	            erLhcoreClassChatEventDispatcher::getInstance()->dispatch('chat.auto_responder_triggered',array('chat' => & $chat));
	        }
	    }

	    $db->commit();
	    echo erLhcoreClassChat::safe_json_encode(array('error' => $error, 'r' => $r));
	    exit;
	    
	} catch (Exception $e) {
        $db->rollback();
        echo erLhcoreClassChat::safe_json_encode(array('error' => 't', 'r' => $e->getMessage()));
        exit;
    }
    
} else {
	$error = 't';
	$r = erTranslationClassLhTranslation::getInstance()->getTranslation('chat/startchat','Please enter a message, max characters').' - '.(int)erLhcoreClassModelChatConfig::fetch('max_message_length')->current_value;
	echo erLhcoreClassChat::safe_json_encode(array('error' => $error, 'r' => $r));
	exit;
}



?>