/**
* Gets the used variables from the provided format
* @param string $format Data format
* @return array Array with the variable strings
*/
private function getVariablesFromFormat($format)
{
$symbol = new NestedSymbol(self::SYMBOL_OPEN, self::SYMBOL_CLOSE, null, true);
$tokenizer = new Tokenizer();
$tokenizer->addSymbol($symbol);
$tokens = $tokenizer->tokenize($format);
$variables = array();
$isVariableOpen = false;
$variableFormat = null;
foreach ($tokens as $token) {
if ($token == self::SYMBOL_OPEN) {
$isVariableOpen = true;
continue;
}
if (!$isVariableOpen) {
continue;
}
if ($token == self::SYMBOL_CLOSE) {
$variables[$variableFormat] = new DataFormatVariable($variableFormat);
$isVariableOpen = false;
$variableFormat = null;
} else {
$variableFormat .= $token;
}
}
return $variables;
}
/**
* Tokenizes the tag content in argument tokens
*
* eg. img=150x100 alt="Image description" width=150
* array {
* "img=150x100",
* "alt=Image Description",
* "width=150",
* }
*
* @param string $tagContent
* @return array
*/
private function tokenize($tagContent)
{
$positionApo = strpos($tagContent, '"');
if (!$positionApo) {
return explode(' ', $tagContent);
}
$tokens = array();
$tokenizer = new Tokenizer();
$tokenizer->addSymbol(new SimpleSymbol(' ', false));
$tokenizer->addSymbol(new NestedSymbol('"', '"', null, true));
$isStringArgument = false;
$previousToken = null;
$parsedTokens = $tokenizer->tokenize($tagContent);
foreach ($parsedTokens as $token) {
if ($token == '"') {
$isStringArgument = !$isStringArgument;
continue;
}
if ($isStringArgument) {
$tokens[count($tokens) - 1] .= $token;
} else {
$tokens[] = $token;
}
}
return $tokens;
}
