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<?php
/**
*
* @package phpBB3
* @copyright (c) 2011 phpBB Group
* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
*
*/
namespace phpbb\template;
/**
* Stores variables assigned to template.
*
* @package phpBB3
*/
class context
{
/**
* variable that holds all the data we'll be substituting into
* the compiled templates. Takes form:
* --> $this->tpldata[block][iteration#][child][iteration#][child2][iteration#][variablename] == value
* if it's a root-level variable, it'll be like this:
* --> $this->tpldata[.][0][varname] == value
*
* @var array
*/
private $tpldata = array('.' => array(0 => array()));
/**
* @var array Reference to template->tpldata['.'][0]
*/
private $rootref;
public function __construct()
{
$this->clear();
}
/**
* Clears template data set.
*/
public function clear()
{
$this->tpldata = array('.' => array(0 => array()));
$this->rootref = &$this->tpldata['.'][0];
}
/**
* Assign a single scalar value to a single key.
*
* Value can be a string, an integer or a boolean.
*
* @param string $varname Variable name
* @param string $varval Value to assign to variable
*/
public function assign_var($varname, $varval)
{
$this->rootref[$varname] = $varval;
return true;
}
/**
* Append text to the string value stored in a key.
*
* Text is appended using the string concatenation operator (.).
*
* @param string $varname Variable name
* @param string $varval Value to append to variable
*/
public function append_var($varname, $varval)
{
$this->rootref[$varname] = (isset($this->rootref[$varname]) ? $this->rootref[$varname] : '') . $varval;
return true;
}
/**
* Returns a reference to template data array.
*
* This function is public so that template renderer may invoke it.
* Users should alter template variables via functions in \phpbb\template\template.
*
* Note: modifying returned array will affect data stored in the context.
*
* @return array template data
*/
public function &get_data_ref()
{
// returning a reference directly is not
// something php is capable of doing
$ref = &$this->tpldata;
return $ref;
}
/**
* Returns a reference to template root scope.
*
* This function is public so that template renderer may invoke it.
* Users should not need to invoke this function.
*
* Note: modifying returned array will affect data stored in the context.
*
* @return array template data
*/
public function &get_root_ref()
{
// rootref is already a reference
return $this->rootref;
}
/**
* Assign key variable pairs from an array to a specified block
*
* @param string $blockname Name of block to assign $vararray to
* @param array $vararray A hash of variable name => value pairs
*/
public function assign_block_vars($blockname, array $vararray)
{
if (strpos($blockname, '.') !== false)
{
// Nested block.
$blocks = explode('.', $blockname);
$blockcount = sizeof($blocks) - 1;
$str = &$this->tpldata;
for ($i = 0; $i < $blockcount; $i++)
{
$str = &$str[$blocks[$i]];
$str = &$str[sizeof($str) - 1];
}
$s_row_count = isset($str[$blocks[$blockcount]]) ? sizeof($str[$blocks[$blockcount]]) : 0;
$vararray['S_ROW_COUNT'] = $vararray['S_ROW_NUM'] = $s_row_count;
// Assign S_FIRST_ROW
if (!$s_row_count)
{
$vararray['S_FIRST_ROW'] = true;
}
// Assign S_BLOCK_NAME
$vararray['S_BLOCK_NAME'] = $blocks[$blockcount];
// Now the tricky part, we always assign S_LAST_ROW and remove the entry before
// This is much more clever than going through the complete template data on display (phew)
$vararray['S_LAST_ROW'] = true;
if ($s_row_count > 0)
{
unset($str[$blocks[$blockcount]][($s_row_count - 1)]['S_LAST_ROW']);
}
// Now we add the block that we're actually assigning to.
// We're adding a new iteration to this block with the given
// variable assignments.
$str[$blocks[$blockcount]][] = $vararray;
$s_num_rows = sizeof($str[$blocks[$blockcount]]);
// Set S_NUM_ROWS
foreach ($str[$blocks[$blockcount]] as &$mod_block)
{
$mod_block['S_NUM_ROWS'] = $s_num_rows;
}
}
else
{
// Top-level block.
$s_row_count = (isset($this->tpldata[$blockname])) ? sizeof($this->tpldata[$blockname]) : 0;
$vararray['S_ROW_COUNT'] = $vararray['S_ROW_NUM'] = $s_row_count;
// Assign S_FIRST_ROW
if (!$s_row_count)
{
$vararray['S_FIRST_ROW'] = true;
}
// Assign S_BLOCK_NAME
$vararray['S_BLOCK_NAME'] = $blockname;
// We always assign S_LAST_ROW and remove the entry before
$vararray['S_LAST_ROW'] = true;
if ($s_row_count > 0)
{
unset($this->tpldata[$blockname][($s_row_count - 1)]['S_LAST_ROW']);
}
// Add a new iteration to this block with the variable assignments we were given.
$this->tpldata[$blockname][] = $vararray;
$s_num_rows = sizeof($this->tpldata[$blockname]);
// Set S_NUM_ROWS
foreach ($this->tpldata[$blockname] as &$mod_block)
{
$mod_block['S_NUM_ROWS'] = $s_num_rows;
}
}
return true;
}
/**
* Assign key variable pairs from an array to a whole specified block loop
*
* @param string $blockname Name of block to assign $block_vars_array to
* @param array $block_vars_array An array of hashes of variable name => value pairs
*/
public function assign_block_vars_array($blockname, array $block_vars_array)
{
foreach ($block_vars_array as $vararray)
{
$this->assign_block_vars($blockname, $vararray);
}
return true;
}
/**
* Change already assigned key variable pair (one-dimensional - single loop entry)
*
* An example of how to use this function:
* {@example alter_block_array.php}
*
* @param string $blockname the blockname, for example 'loop'
* @param array $vararray the var array to insert/add or merge
* @param mixed $key Key to search for
*
* array: KEY => VALUE [the key/value pair to search for within the loop to determine the correct position]
*
* int: Position [the position to change or insert at directly given]
*
* If key is false the position is set to 0
* If key is true the position is set to the last entry
*
* @param string $mode Mode to execute (valid modes are 'insert' and 'change')
*
* If insert, the vararray is inserted at the given position (position counting from zero).
* If change, the current block gets merged with the vararray (resulting in new key/value pairs be added and existing keys be replaced by the new \value).
*
* Since counting begins by zero, inserting at the last position will result in this array: array(vararray, last positioned array)
* and inserting at position 1 will result in this array: array(first positioned array, vararray, following vars)
*
* @return bool false on error, true on success
*/
public function alter_block_array($blockname, array $vararray, $key = false, $mode = 'insert')
{
if (strpos($blockname, '.') !== false)
{
// Nested block.
$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];
}
$block = &$block[$blocks[$i]]; // Traverse the last block
}
else
{
// Top-level block.
$block = &$this->tpldata[$blockname];
}
// Change key to zero (change first position) if false and to last position if true
if ($key === false || $key === true)
{
$key = ($key === false) ? 0 : sizeof($block);
}
// Get correct position if array given
if (is_array($key))
{
// Search array to get correct position
list($search_key, $search_value) = @each($key);
$key = null;
foreach ($block as $i => $val_ary)
{
if ($val_ary[$search_key] === $search_value)
{
$key = $i;
break;
}
}
// key/value pair not found
if ($key === null)
{
return false;
}
}
// Insert Block
if ($mode == 'insert')
{
// Make sure we are not exceeding the last iteration
if ($key >= sizeof($this->tpldata[$blockname]))
{
$key = sizeof($this->tpldata[$blockname]);
unset($this->tpldata[$blockname][($key - 1)]['S_LAST_ROW']);
$vararray['S_LAST_ROW'] = true;
}
else if ($key === 0)
{
unset($this->tpldata[$blockname][0]['S_FIRST_ROW']);
$vararray['S_FIRST_ROW'] = true;
}
// Assign S_BLOCK_NAME
$vararray['S_BLOCK_NAME'] = $blockname;
// Re-position template blocks
for ($i = sizeof($block); $i > $key; $i--)
{
$block[$i] = $block[$i-1];
$block[$i]['S_ROW_COUNT'] = $block[$i]['S_ROW_NUM'] = $i;
}
// Insert vararray at given position
$block[$key] = $vararray;
$block[$key]['S_ROW_COUNT'] = $block[$key]['S_ROW_NUM'] = $key;
// Set S_NUM_ROWS
foreach ($this->tpldata[$blockname] as &$mod_block)
{
$mod_block['S_NUM_ROWS'] = sizeof($this->tpldata[$blockname]);
}
return true;
}
// Which block to change?
if ($mode == 'change')
{
if ($key == sizeof($block))
{
$key--;
}
$block[$key] = array_merge($block[$key], $vararray);
return true;
}
return false;
}
/**
* Reset/empty complete block
*
* @param string $blockname Name of block to destroy
*/
public function destroy_block_vars($blockname)
{
if (strpos($blockname, '.') !== false)
{
// Nested block.
$blocks = explode('.', $blockname);
$blockcount = sizeof($blocks) - 1;
$str = &$this->tpldata;
for ($i = 0; $i < $blockcount; $i++)
{
$str = &$str[$blocks[$i]];
$str = &$str[sizeof($str) - 1];
}
unset($str[$blocks[$blockcount]]);
}
else
{
// Top-level block.
unset($this->tpldata[$blockname]);
}
return true;
}
}
|
