Update klein.php

2017-02-28 14:55:36 +03:00 · 2017-02-28 14:55:36 +03:00 · 16fdce2f75
commit 16fdce2f75
parent 21834d04d8
1 changed files with 0 additions and 0 deletions
--- a/Klein.php
+++ b/Klein.php
@ -0,0 +1,58 @@
+<?php
+
+class Klein {
+    private $code;
+
+    function compile($html) {
+        $pattern = array_map(function ($grammar) {
+            list(, $result) = $grammar;
+            $body = strtr($grammar[0], [' ' => "\s*", '+' => "\s+", ':var' => "(\w+(\s*\.\s*\w+)*)", ':id' => "(\w+)", '{{' => "{{\!?"]);
+            return ["/$body/",
+                function ($x) use ($result) {
+                    $code = "<?php " . preg_replace_callback("/#(\d+)(s?)/", function ($s) use($x) {
+                            $pref = $s[2] == 's' ? '$' : '';
+                            return implode(", ", array_map(function ($s) use($pref) {
+                                return $pref.preg_replace("/\.\s*(\w+)/", "['$1']", $s); }, preg_split("/\s*,\s*/", $x[$s[1]])));
+                        }, $result) . " ?>";
+                    return ($x[0][2] == '!') ? "<!-- $code -->" : $code;
+                }];
+        }, [
+            ["{% for+:id+in+:var %}", "foreach(#2s as \$index => #1s): \$loop = Klein::loop(\$index, #2s);"],
+            ["{% for+:id , :id+in+:var %}", "foreach(#3s as #1s => #2s):"],
+            ["{% endfor %}", "endforeach;"],
+            ["{% ifset+:var %}", "if(isset(#1s)):"],
+            ["{% if+:var %}", "if(isset(#1s) && #1s):"],
+            ["{% if+:id \(( :var (, :var )*)?\) %}", "if(macro_#1(#2s)):"],
+            ["{% unless+:var %}", "if(!(isset(#1s) && #1s)):"],
+            ["{% else %}", "else:"],
+            ["{% endif %}", "endif;"],
+            ["{{ :var }}", "echo #1s;"],
+            ["{{ :id \(( :var (, :var )*)?\) }}", "echo macro_#1(#2s);"],
+            ["{{ :var\|:id }}", "echo #3(#1s);"],
+            ["{% macro+:id \(( :id (, :id )*)?\) %}", "function macro_#1(#2s) {"],
+            ["{% endmacro %}", "}"]
+        ]);
+
+        $result = file_get_contents($html);
+        foreach($pattern as $arg) {
+            $result = preg_replace_callback($arg[0], $arg[1], $result);
+        }
+
+        $this->code = $result;
+    }
+
+    static function loop($idx, &$array) {
+        $is_even =  $idx % 2;
+        return ['first' => $idx == 0
+            , 'last' => $idx == count($array) - 1
+            , 'odd' => !$is_even
+            , 'even' => $is_even];
+    }
+
+    function render($vars) {
+        extract($vars);
+        ob_start();
+        eval(" ?>".$this->code."<?php ");
+        return ob_get_clean();
+    }
+}