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vendor/facade/ignition/src/Views/Compilers/BladeSourceMapCompiler.php

@@ -0,0 +1,94 @@
+<?php
+
+namespace Facade\Ignition\Views\Compilers;
+
+use ErrorException;
+use Illuminate\View\Compilers\BladeCompiler;
+
+class BladeSourceMapCompiler extends BladeCompiler
+{
+    public function detectLineNumber(string $filename, int $exceptionLineNumber): int
+    {
+        try {
+            $map = $this->compileString(file_get_contents($filename));
+        } catch (ErrorException $e) {
+            return 1;
+        }
+
+        $map = explode("\n", $map);
+
+        $line = $map[$exceptionLineNumber - 1] ?? $exceptionLineNumber;
+        $pattern = '/\|---LINE:([0-9]+)---\|/m';
+
+        if (preg_match($pattern, (string)$line, $matches)) {
+            return (int)$matches[1];
+        }
+
+        return $exceptionLineNumber;
+    }
+
+    public function compileString($value)
+    {
+        try {
+            $value = $this->addEchoLineNumbers($value);
+
+            $value = $this->addStatementLineNumbers($value);
+
+            $value = parent::compileString($value);
+
+            return $this->trimEmptyLines($value);
+        } catch (\Exception $e) {
+            return $value;
+        }
+    }
+
+    protected function addEchoLineNumbers(string $value)
+    {
+        $pattern = sprintf('/(@)?%s\s*(.+?)\s*%s(\r?\n)?/s', $this->contentTags[0], $this->contentTags[1]);
+
+        if (preg_match_all($pattern, $value, $matches, PREG_OFFSET_CAPTURE)) {
+            foreach (array_reverse($matches[0]) as $match) {
+                $position = mb_strlen(substr($value, 0, $match[1]));
+
+                $value = $this->insertLineNumberAtPosition($position, $value);
+            }
+        }
+
+        return $value;
+    }
+
+    protected function addStatementLineNumbers(string $value)
+    {
+        $shouldInsertLineNumbers = preg_match_all(
+            '/\B@(@?\w+(?:::\w+)?)([ \t]*)(\( ( (?>[^()]+) | (?3) )* \))?/x',
+            $value,
+            $matches,
+            PREG_OFFSET_CAPTURE
+        );
+
+        if ($shouldInsertLineNumbers) {
+            foreach (array_reverse($matches[0]) as $match) {
+                $position = mb_strlen(substr($value, 0, $match[1]));
+
+                $value = $this->insertLineNumberAtPosition($position, $value);
+            }
+        }
+
+        return $value;
+    }
+
+    protected function insertLineNumberAtPosition(int $position, string $value)
+    {
+        $before = mb_substr($value, 0, $position);
+        $lineNumber = count(explode("\n", $before));
+
+        return mb_substr($value, 0, $position)."|---LINE:{$lineNumber}---|".mb_substr($value, $position);
+    }
+
+    protected function trimEmptyLines(string $value)
+    {
+        $value = preg_replace('/^\|---LINE:([0-9]+)---\|$/m', '', $value);
+
+        return ltrim($value, PHP_EOL);
+    }
+}