public function verifyAnswer(Answer $answer)
{
// TODO check typecasting
if ($answer->answer == $this->answer) {
return TRUE;
}
try {
return Cislo::parse($answer->answer) == $this->answer;
} catch (\Exception $e) {
return FALSE;
}
}
/**
* @param array $node
* @param array $vars
* @param $inLatex
* @param $inColor
* @return string
*/
private function compileNode(array $node, array $vars, &$inLatex, &$inColor)
{
switch ($node['tag']) {
case self::T_TEXT:
return isset($node['value']) ? $node['value'] : '';
case self::T_EVAL:
if ($node['type'] !== self::S_COMPLETE) {
throw new InvalidArgumentException();
}
return $this->evaluate($node['value'], $vars);
case self::T_LATEX:
if ($node['type'] === self::S_OPEN) {
$inLatex = TRUE;
$out = '$';
if ($inColor) {
$open = $this->getColorOpen($inColor, TRUE);
$out = "</span>\${$open}";
}
return $out . (isset($node['value']) ? $node['value'] : '');
} else {
if ($node['type'] === self::S_CLOSE) {
$inLatex = FALSE;
if ($inColor) {
$open = $this->getColorOpen($inColor, FALSE);
return "}\${$open}";
}
return '$';
} else {
if ($node['type'] === self::S_INNER) {
return $node['value'];
} else {
if ($inColor) {
$openLatex = $this->getColorOpen($inColor, TRUE);
$openText = $this->getColorOpen($inColor, FALSE);
return "</span>\${$openLatex}{$node['value']}}\${$openText}";
}
return '$' . $node['value'] . '$';
}
}
}
case self::T_COLOR:
$color = $inColor ?: $node['attributes']['ID'];
$open = $this->getColorOpen($color, $inLatex);
$close = $inLatex ? '}' : '</span>';
if ($node['type'] === self::S_COMPLETE) {
return $open . $node['value'] . $close;
} else {
if ($node['type'] === self::S_OPEN) {
$inColor = $color;
return $open . (isset($node['value']) ? $node['value'] : '');
} else {
if ($node['type'] === self::S_INNER) {
return $node['value'];
} else {
$inColor = FALSE;
return $close;
}
}
}
case self::T_INFLECT:
if ($node['type'] === self::S_COMPLETE) {
return $this->inflection->inflect($node['value'], $node['attributes']['CASE']);
} else {
if ($node['type'] === self::S_OPEN) {
$this->bufferLevel++;
$this->bufferData[$this->bufferLevel] = $node['attributes']['CASE'];
return '';
} else {
if ($node['type'] === self::S_INNER) {
return $node['value'];
} else {
$buffer = $this->buffers[$this->bufferLevel];
$case = $this->bufferData[$this->bufferLevel];
$out = $this->inflection->inflect($buffer, $case);
$this->bufferLevel--;
array_pop($this->buffers);
return $out;
}
}
}
case self::T_IMG:
if ($node['type'] !== self::S_COMPLETE) {
throw new BlueprintCompilerException('Invalid image syntax');
}
$url = isset($node['attributes']['SRC']) ? $node['attributes']['SRC'] : $this->evaluate($node['attributes']['EVALSRC'], $vars);
if (strpos($url, 'http://') !== FALSE) {
throw new BlueprintCompilerException("Invalid image source '{$url}', http not allowed.");
}
if (strpos($url, 'https://') === FALSE) {
$url = "/data/exercise/{$url}";
}
$count = $this->evaluate($node['attributes']['COUNT'], $vars);
$size = isset($node['attributes']['SIZE']) ? $node['attributes']['SIZE'] : 48;
return str_repeat("<img src=\"{$url}\" height=\"{$size}\" />", max(0, $count));
case self::T_NUMBER:
if ($node['type'] === self::S_COMPLETE) {
return Cislo::toWord($node['value']);
} else {
if ($node['type'] === self::S_OPEN) {
$this->bufferLevel++;
return '';
} else {
if ($node['type'] === self::S_INNER) {
return $node['value'];
} else {
$buffer = $this->buffers[$this->bufferLevel];
$out = Cislo::toWord($buffer);
$this->bufferLevel--;
array_pop($this->buffers);
return $out;
}
}
}
case self::T_BOX:
return '<span class="fillin-box"></span>';
default:
throw new NotImplementedException("Unknown tag '{$node['tag']}' in '{$this->errorContext}'");
}
}
