<?php
/**
* Smarty Internal Plugin Compile For
* 
* Compiles the {for} {forelse} {/for} tags
* 
* @package Smarty
* @subpackage Compiler
* @author Uwe Tews 
*/
/**
* Smarty Internal Plugin Compile For Class
*/
class Smarty_Internal_Compile_For extends Smarty_Internal_CompileBase {
    /**
    * Compiles code for the {for} tag
    * 
    * Smarty 3 does implement two different sytaxes:
    * 
    * - {for $var in $array}
    * For looping over arrays or iterators
    * 
    * - {for $x=0; $x<$y; $x++}
    * For general loops
    * 
    * The parser is gereration different sets of attribute by which this compiler can 
    * determin which syntax is used.
    * 
    * @param array $args array with attributes from parser
    * @param object $compiler compiler object
    * @return string compiled code
    */
    public function compile($args, $compiler)
    {
        $this->compiler = $compiler; 
        // {for $x=0; $x<$y; $x++} syntax
        if (isset($args['ifexp'])) {
            $this->required_attributes = array('ifexp', 'start', 'loop', 'varloop');
        } else {
            $this->required_attributes = array('start', 'to');
            $this->optional_attributes = array('step', 'max');
        } 
        // check and get attributes
        $_attr = $this->_get_attributes($args);

        $this->_open_tag('for', array('for', $this->compiler->nocache)); 
        // maybe nocache because of nocache variables
        $this->compiler->nocache = $this->compiler->nocache | $this->compiler->tag_nocache;

        $output = "<?php ";
        if (isset($_attr['ifexp'])) {
            foreach ($_attr['start'] as $_statement) {
                $output .= " \$_smarty_tpl->tpl_vars[$_statement[var]] = new Smarty_Variable;";
                $output .= " \$_smarty_tpl->tpl_vars[$_statement[var]]->value = $_statement[value];\n";
            } 
            $output .= "  if ($_attr[ifexp]){ for (\$_foo=true;$_attr[ifexp]; \$_smarty_tpl->tpl_vars[$_attr[varloop]]->value$_attr[loop]){\n";
        } else {
            $_statement = $_attr['start'];
            $output .= "\$_smarty_tpl->tpl_vars[$_statement[var]] = new Smarty_Variable;";
            if (isset($_attr['step'])) {
                $output .= "\$_smarty_tpl->tpl_vars[$_statement[var]]->step = $_attr[step];";
            } else {
                $output .= "\$_smarty_tpl->tpl_vars[$_statement[var]]->step = ($_attr[to] - ($_statement[value]) < 0) ? -1 : 1;";
            } 
            if (isset($_attr['max'])) {
                $output .= "\$_smarty_tpl->tpl_vars[$_statement[var]]->total = (int)min(ceil((\$_smarty_tpl->tpl_vars[$_statement[var]]->step > 0 ? $_attr[to]+1 - $_statement[value] : $_statement[value]-($_attr[to])+1)/abs(\$_smarty_tpl->tpl_vars[$_statement[var]]->step)),$_attr[max]);\n";
            } else {
                $output .= "\$_smarty_tpl->tpl_vars[$_statement[var]]->total = (int)ceil((\$_smarty_tpl->tpl_vars[$_statement[var]]->step > 0 ? $_attr[to]+1 - $_statement[value] : $_statement[value]-($_attr[to])+1)/abs(\$_smarty_tpl->tpl_vars[$_statement[var]]->step));\n";
            } 
            $output .= "if (\$_smarty_tpl->tpl_vars[$_statement[var]]->total > 0){\n";
            $output .= "for (\$_smarty_tpl->tpl_vars[$_statement[var]]->value = $_statement[value], \$_smarty_tpl->tpl_vars[$_statement[var]]->iteration = 1;\$_smarty_tpl->tpl_vars[$_statement[var]]->iteration <= \$_smarty_tpl->tpl_vars[$_statement[var]]->total;\$_smarty_tpl->tpl_vars[$_statement[var]]->value += \$_smarty_tpl->tpl_vars[$_statement[var]]->step, \$_smarty_tpl->tpl_vars[$_statement[var]]->iteration++){\n";
            $output .= "\$_smarty_tpl->tpl_vars[$_statement[var]]->first = \$_smarty_tpl->tpl_vars[$_statement[var]]->iteration == 1;";
            $output .= "\$_smarty_tpl->tpl_vars[$_statement[var]]->last = \$_smarty_tpl->tpl_vars[$_statement[var]]->iteration == \$_smarty_tpl->tpl_vars[$_statement[var]]->total;";
        } 
        $output .= "?>"; 
        // return compiled code
        return $output;
    } 
} 

/**
* Smarty Internal Plugin Compile Forelse Class
*/
class Smarty_Internal_Compile_Forelse extends Smarty_Internal_CompileBase {
    /**
    * Compiles code for the {forelse} tag
    * 
    * @param array $args array with attributes from parser
    * @param object $compiler compiler object
    * @return string compiled code
    */
    public function compile($args, $compiler)
    {
        $this->compiler = $compiler; 
        // check and get attributes
        $_attr = $this->_get_attributes($args);

        list($_open_tag, $nocache) = $this->_close_tag(array('for'));
        $this->_open_tag('forelse', array('forelse', $nocache));
        return "<?php }} else { ?>";
    } 
} 

/**
* Smarty Internal Plugin Compile Forclose Class
*/
class Smarty_Internal_Compile_Forclose extends Smarty_Internal_CompileBase {
    /**
    * Compiles code for the {/for} tag
    * 
    * @param array $args array with attributes from parser
    * @param object $compiler compiler object
    * @return string compiled code
    */
    public function compile($args, $compiler)
    {
        $this->compiler = $compiler; 
        // check and get attributes
        $_attr = $this->_get_attributes($args); 
        // must endblock be nocache?
        if ($this->compiler->nocache) {
            $this->compiler->tag_nocache = true;
        } 

        list($_open_tag, $this->compiler->nocache) = $this->_close_tag(array('for', 'forelse'));
        if ($_open_tag == 'forelse')
            return "<?php }  ?>";
        else
            return "<?php }} ?>";
    } 
} 

?>
