From f23d9bf2e0886498a3d9d5bb0a800d663b795e61 Mon Sep 17 00:00:00 2001
From: javiexin <javiexin@gmail.com>
Date: Sun, 5 Feb 2017 21:47:31 +0100
Subject: [PATCH] [ticket/15068] Add template vars retrieval from the template
 object

PHPBB3-15068
---
 phpBB/phpbb/template/base.php     | 29 ++++++++++++++++
 phpBB/phpbb/template/context.php  | 57 +++++++++++++++++++++++++++++++
 phpBB/phpbb/template/template.php | 24 +++++++++++++
 3 files changed, 110 insertions(+)

diff --git a/phpBB/phpbb/template/base.php b/phpBB/phpbb/template/base.php
index 9a40702ba8..e84aef6abe 100644
--- a/phpBB/phpbb/template/base.php
+++ b/phpBB/phpbb/template/base.php
@@ -104,6 +104,27 @@ abstract class base implements template
 		return $this;
 	}
 
+	/**
+	* {@inheritdoc}
+	*/
+	public function retrieve_vars(array $vararray)
+	{
+		$result = array();
+		foreach ($vararray as $varname)
+		{
+			$result[$varname] = $this->retrieve_var($varname);
+		}
+		return $result;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function retrieve_var($varname)
+	{
+		return $this->context->retrieve_var($varname);
+	}
+
 	/**
 	* {@inheritdoc}
 	*/
@@ -124,6 +145,14 @@ abstract class base implements template
 		return $this;
 	}
 
+	/**
+	* {@inheritdoc}
+	*/
+	public function retrieve_block_vars($blockname, array $vararray)
+	{
+		return $this->context->retrieve_block_vars($blockname, $vararray);
+	}
+
 	/**
 	* {@inheritdoc}
 	*/
diff --git a/phpBB/phpbb/template/context.php b/phpBB/phpbb/template/context.php
index 4ee48205c8..0e5f3287aa 100644
--- a/phpBB/phpbb/template/context.php
+++ b/phpBB/phpbb/template/context.php
@@ -86,6 +86,17 @@ class context
 		return true;
 	}
 
+	/**
+	* Retreive a single scalar value from a single key.
+	*
+	* @param string $varname Variable name
+	* @return mixed Variable value, or null if not set
+	*/
+	public function retrieve_var($varname)
+	{
+		return isset($this->rootref[$varname]) ? $this->rootref[$varname] : null;
+	}
+
 	/**
 	* Returns a reference to template data array.
 	*
@@ -263,6 +274,52 @@ class context
 		return true;
 	}
 
+	/**
+	* Retrieve key variable pairs from the specified block
+	*
+	* @param string $blockname Name of block to retrieve $vararray from
+	* @param array $vararray An array of variable names
+	* @return array of hashes with variable name as key and retrieved value or null as value
+	*/
+	public function retrieve_block_vars($blockname, array $vararray)
+	{
+		// For nested block, $blockcount > 0, for top-level block, $blockcount == 0
+		$blocks = explode('.', $blockname);
+		$blockcount = sizeof($blocks) - 1;
+
+		$block = $this->tpldata;
+		for ($i = 0; $i <= $blockcount; $i++)
+		{
+			if (($pos = strpos($blocks[$i], '[')) !== false)
+			{
+				$name = substr($blocks[$i], 0, $pos);
+
+				if (strpos($blocks[$i], '[]') === $pos)
+				{
+					$index = sizeof($block[$name]) - 1;
+				}
+				else
+				{
+					$index = min((int) substr($blocks[$i], $pos + 1, -1), sizeof($block[$name]) - 1);
+				}
+			}
+			else
+			{
+				$name = $blocks[$i];
+				$index = sizeof($block[$name]) - 1;
+			}
+			$block = $block[$name];
+			$block = $block[$index];
+		}
+
+		$result = array();
+		foreach ($vararray as $varname)
+		{
+			$result[$varname] = isset($block[$varname]) ? $block[$varname] : null;
+		}
+		return $result;
+	}
+
 	/**
 	* Change already assigned key variable pair (one-dimensional - single loop entry)
 	*
diff --git a/phpBB/phpbb/template/template.php b/phpBB/phpbb/template/template.php
index 041ecb12e4..183999d5f4 100644
--- a/phpBB/phpbb/template/template.php
+++ b/phpBB/phpbb/template/template.php
@@ -127,6 +127,22 @@ interface template
 	*/
 	public function append_var($varname, $varval);
 
+	/**
+	* Retrieve multiple template values
+	*
+	* @param array $vararray An array with variable names
+	* @return array A hash of variable name => value pairs (value is null if not set)
+	*/
+	public function retrieve_vars(array $vararray);
+
+	/**
+	* Retreive a single scalar value from a single key.
+	*
+	* @param string $varname Variable name
+	* @return mixed Variable value, or null if not set
+	*/
+	public function retrieve_var($varname);
+
 	/**
 	* Assign key variable pairs from an array to a specified block
 	* @param string $blockname Name of block to assign $vararray to
@@ -143,6 +159,14 @@ interface template
 	*/
 	public function assign_block_vars_array($blockname, array $block_vars_array);
 
+	/**
+	* Retrieve variable values from an specified block
+	* @param string $blockname Name of block to retrieve $vararray from
+	* @param array $vararray An array with variable names
+	* @return array A hash of variable name => value pairs (value is null if not set)
+	*/
+	public function retrieve_block_vars($blockname, array $vararray);
+
 	/**
 	* Change already assigned key variable pair (one-dimensional - single loop entry)
 	*