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mychidarkomychidarko
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feat: add parser
1 parent fde4bba commit 377e3b9

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‎src/UI/Parser.php‎

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<?php
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namespace Leaf\UI;
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use Leaf\UI;
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use MatthiasMullie\Minify\CSS;
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/**
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* This class handles the internal parsing of Leaf UI components
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*/
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class Parser {
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/**
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* Compile Leaf UI Template
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* @param string $rawText The template to compile
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*/
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public static function compileTemplate(string $rawText, array $state = []): string
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{
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$compiled = preg_replace_callback('/{{(.*?)}}/', function ($matches) use ($state) {
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return $state[ltrim(trim($matches[1]), '$')] ?? trigger_error($matches[1] . ' is not defined', E_USER_ERROR);
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}, $rawText);
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$compiled = preg_replace_callback('/<style.*?>(.*?)<\/style>/is', function ($matches) {
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$newCSS = (new CSS())->add($matches[1])->minify();
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return str_replace($matches[1], $newCSS, $matches[0]);
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}, $compiled);
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$compiled = preg_replace_callback('/\$eval\((.*?)\)/', function ($matches) use ($state) {
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$compiledWithVars = preg_replace_callback('/\$([a-zA-Z0-9_]+)/', function ($matches) use ($state) {
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return $state[$matches[1]] ?? trigger_error($matches[1] . ' is not defined', E_USER_ERROR);
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}, $matches[1]);
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return eval("return $compiledWithVars;");
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}, $compiled);
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$compiled = preg_replace_callback('/@loop\([\s\S]*?\)\s*[\s\S]*@endloop\s*/', function ($matches) use ($state) {
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$rendered = '';
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$loopMatches = null;
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preg_match('/@loop\((.*?)\)/', $matches[0], $loopMatches);
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$dataToLoop = "return $loopMatches[1];";
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if (strpos($loopMatches[1], '$') !== false) {
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$loopMatches[1] = $state[ltrim(trim($loopMatches[1]), '$')] ?? trigger_error($loopMatches[1] . ' is not defined', E_USER_ERROR);
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$dataToLoop = 'return json_decode(\'' . json_encode($loopMatches[1]) . '\', true);';
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}
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static::loop(eval($dataToLoop), function ($value, $key) use ($matches, &$rendered, $state) {
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$regex = '/@loop\((.*?)\)([\s\S]*?)@endloop/';
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preg_match($regex, $matches[0], $regexLoopMatches);
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preg_match('/@key/', $regexLoopMatches[2], $keyMatches);
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preg_match('/@value/', $regexLoopMatches[2], $valueMatches);
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$renderedString = str_replace(
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['@key', '@value', "\""],
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[$key, '$value', "'"],
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preg_replace(
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'/@value\[[\'"][^\'"]*[\'"]\]/',
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'{$0}',
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preg_replace_callback(
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'/@if\((.*?)\)/',
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function ($ifStatementMatches) {
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$compiledIf = '';
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if (strpos($ifStatementMatches[1], '@value[') !== false) {
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$compiledIf = preg_replace('/@value\[[\'"]([^\'"]*)[\'"]\]/', '\'@value[\'$1\']\'', $ifStatementMatches[0]);
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}
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if (strpos($compiledIf, '@key') !== false) {
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$compiledIf = str_replace('@key', '\'@key\'', $compiledIf);
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}
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return $compiledIf;
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},
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$regexLoopMatches[2]
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)
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)
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);
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$rendered .= eval("\$value = json_decode('" . json_encode($value) . "', true); return \"$renderedString\";");
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});
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return $rendered;
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}, $compiled);
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$compiled = preg_replace_callback('/@if\([\s\S]*?\)\s*[\s\S]*?(\s*@endif\s*)/', function ($matches) use ($state) {
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$renderedData = '';
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$compiledWithParsedConditions = preg_replace_callback('/\$([a-zA-Z0-9_]+)/', function ($matches) use ($state) {
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return $state[$matches[1]] ?? trigger_error($matches[1] . ' is not defined', E_USER_ERROR);
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}, $matches[0]);
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preg_match('/@if\((.*?)\)/', $compiledWithParsedConditions, $condition);
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if (eval("return $condition[1];") === true) {
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preg_match(
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'/@if\([\s\S]*?\)\s*[\s\S]*?(?:\s*@elseif\([\s\S]*?\)\s*[\s\S]*?|\s*@else\s*[\s\S]*?|\s*@endif\s*)/',
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$compiledWithParsedConditions,
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$ifConditionMatches
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);
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$renderedData = preg_replace('/@if\([\s\S]*?\)\s*[\s\S]*?/', '', $ifConditionMatches[0]);
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$renderedData = preg_replace('/\s*@elseif\([\s\S]*?\)\s*[\s\S]*?/', '', $renderedData);
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$renderedData = preg_replace('/\s*@else\s*[\s\S]*?/', '', $renderedData);
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} else {
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if (strpos($compiledWithParsedConditions, '@elseif') !== false) {
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preg_match('/@elseif\((.*?)\)/', $compiledWithParsedConditions, $elseifCondition);
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if (eval("return $elseifCondition[1];") === true) {
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preg_match(
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'/@elseif\([\s\S]*?\)\s*[\s\S]*?(?:\s*@elseif\([\s\S]*?\)\s*[\s\S]*?|\s*@else\s*[\s\S]*?|\s*@endif\s*)/',
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$compiledWithParsedConditions,
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$elseifConditionMatches
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);
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$renderedData = preg_replace('/@elseif\([\s\S]*?\)\s*[\s\S]*?/', '', $elseifConditionMatches[0]);
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$renderedData = preg_replace('/\s*@else\s*[\s\S]*?/', '', $renderedData);
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} else if (strpos($compiledWithParsedConditions, '@else') !== false) {
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preg_match('/@else\s*(.*?)\s*@endif/', $compiledWithParsedConditions, $elseConditionMatches);
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$renderedData = $elseConditionMatches[1];
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}
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} else {
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if (strpos($compiledWithParsedConditions, '@else') !== false) {
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preg_match('/@else\s*(.*?)\s*@endif/', $compiledWithParsedConditions, $elseConditionMatches);
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$renderedData = $elseConditionMatches[1];
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}
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}
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}
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return $renderedData;
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}, $compiled);
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$compiled = preg_replace_callback('/@php\s*([\s\S]+?)\s*@endphp/', function ($matches) {
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return eval($matches[1]);
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}, $compiled);
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$compiled = preg_replace_callback('/@include\((.*?)\)/', function ($matches) use ($state) {
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$viewToInclude = trim($matches[1], '"\'\`');
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$compiledWithVars = preg_replace_callback('/\$([a-zA-Z0-9_]+)/', function ($matches) use ($state) {
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return $state[$matches[1]] ?? trigger_error($matches[1] . ' is not defined', E_USER_ERROR);
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}, $viewToInclude);
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return UI::view($compiledWithVars);
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}, $compiled);
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$compiled = preg_replace_callback('/@component\((.*?)\)/', function ($matches) {
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$paramsArray = preg_split('/,\s*/', $matches[1]);
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$props = preg_replace('/\s+/', '', $paramsArray[1] ?? '[]');
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return UI::component($paramsArray[0], eval("return $props;"));
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}, $compiled);
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return $compiled;
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}
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/**
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* Loop over an array of items
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*
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* @param array|string|int $array The array to loop through
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* @param callable $handler Call back function to run per iteration
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*/
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public static function loop($array, callable $handler)
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{
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$element = "";
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if (!is_array($array)) {
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$array = explode(',', str_repeat(',', (int) $array - 1));
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}
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if (is_callable($handler)) {
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foreach ($array as $key => $value) {
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$element .= call_user_func($handler, $value, $key);
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}
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}
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return $element;
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}
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public static function parseStyles(array $styles): string
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{
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$parsedStyles = '';
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foreach ($styles as $key => $value) {
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if (is_numeric($key)) {
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$value = rtrim($value, ';');
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$parsedStyles .= "$value;";
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} else if (is_string($value)) {
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$value = rtrim($value, ';');
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if (strpos($value, ':') !== false) {
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$parsedStyles .= "$key { $value; }";
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} else {
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$parsedStyles .= "$key: $value;";
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}
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} else {
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$parsedStyles .= "$key {";
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foreach ($value as $selector => $styling) {
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if (is_array($styling)) {
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if (is_string($selector)) {
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$parsedStyles .= self::parseStyles([$selector => $styling]);
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} else {
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$parsedStyles .= self::parseStyles($styling);
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}
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} else {
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$styling = rtrim($styling, ';');
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if (is_numeric($selector)) {
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$parsedStyles .= self::parseStyles(["$styling;"]);
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} else {
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if (strpos($styling, ':') !== false) {
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$parsedStyles .= "$selector { $styling; }";
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} else {
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$parsedStyles .= "$selector: $styling;";
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}
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}
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}
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}
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$parsedStyles .= '}';
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}
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}
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return $parsedStyles;
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}
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}

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