Version 4.6.0

system/3rd_party/graphql-php/Utils/BlockString.php

@@ -0,0 +1,77 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Utils;
+
+use function array_pop;
+use function array_shift;
+use function count;
+use function implode;
+use function mb_strlen;
+use function mb_substr;
+use function preg_split;
+use function trim;
+
+class BlockString
+{
+    /**
+     * Produces the value of a block string from its parsed raw value, similar to
+     * Coffeescript's block string, Python's docstring trim or Ruby's strip_heredoc.
+     *
+     * This implements the GraphQL spec's BlockStringValue() static algorithm.
+     */
+    public static function value($rawString)
+    {
+        // Expand a block string's raw value into independent lines.
+        $lines = preg_split("/\\r\\n|[\\n\\r]/", $rawString);
+
+        // Remove common indentation from all lines but first.
+        $commonIndent = null;
+        $linesLength  = count($lines);
+
+        for ($i = 1; $i < $linesLength; $i++) {
+            $line   = $lines[$i];
+            $indent = self::leadingWhitespace($line);
+
+            if ($indent >= mb_strlen($line) ||
+                ($commonIndent !== null && $indent >= $commonIndent)
+            ) {
+                continue;
+            }
+
+            $commonIndent = $indent;
+            if ($commonIndent === 0) {
+                break;
+            }
+        }
+
+        if ($commonIndent) {
+            for ($i = 1; $i < $linesLength; $i++) {
+                $line      = $lines[$i];
+                $lines[$i] = mb_substr($line, $commonIndent);
+            }
+        }
+
+        // Remove leading and trailing blank lines.
+        while (count($lines) > 0 && trim($lines[0], " \t") === '') {
+            array_shift($lines);
+        }
+        while (count($lines) > 0 && trim($lines[count($lines) - 1], " \t") === '') {
+            array_pop($lines);
+        }
+
+        // Return a string of the lines joined with U+000A.
+        return implode("\n", $lines);
+    }
+
+    private static function leadingWhitespace($str)
+    {
+        $i = 0;
+        while ($i < mb_strlen($str) && ($str[$i] === ' ' || $str[$i] === '\t')) {
+            $i++;
+        }
+
+        return $i;
+    }
+}