Started adding matching functionality

lib/Scope/Matcher.php

@@ -6,4 +6,8 @@
 declare(strict_types=1);
 namespace dW\Highlighter\Scope;
 
-abstract class Matcher {}
+abstract class Matcher {
+    public function getPrefix(string $scope) {
+        return null;
+    }
+}

lib/Scope/Matchers/ScopeMatcher.php

@@ -12,4 +12,43 @@ class ScopeMatcher extends Matcher {
     public function __construct(SegmentMatcher|TrueMatcher ...$matchers) {
         $this->segments = $matchers;
     }
+
+    public function matches(string $scope): bool {
+        $lastDotIndex = 0;
+        $scopeLen = strlen($scope);
+        foreach ($this->segments as $index => $segment) {
+            if ($lastIndex > $scopeLen) {
+                break;
+            }
+
+            $nextDotIndex = strpos($scope, '.', $lastDotIndex);
+            if ($nextDotIndex === false) {
+                $nextDotIndex = $scopeLen;
+            }
+
+            $scopeSegment = substr($scope, $lastDotIndex, $nextDotIndex);
+            if (!$segment->matches($scopeSegment)) {
+                return false;
+            }
+
+            $lastDotIndex = $nextDotIndex + 1;
+        }
+
+        return ($index === count($this->segments));
+    }
+
+    public function getPrefix(string $scope): string|null|false {
+        $scopeSegments = explode('.', $scope);
+        if (count($scopeSegments) < count($this->segments)) {
+            return false;
+        }
+
+        foreach ($this->segments as $index => $segment) {
+            if ($segment->matches($scopeSegments[$index])) {
+                if ($segment->prefix !== null) {
+                    return $segment->prefix;
+                }
+            }
+        }
+    }
 }

lib/Scope/Matchers/SegmentMatcher.php

@@ -12,4 +12,8 @@ class SegmentMatcher extends Matcher {
     public function __construct(string $segment) {
         $this->segment = $segment;
     }
+
+    public function matches(string $scope): bool {
+        return ($scope === $this->segment);
+    }
 }

lib/Scope/Matchers/TrueMatcher.php

@@ -12,4 +12,8 @@ class TrueMatcher extends Matcher {
     public function __construct(string $scopeName) {
         $this->scopeName = $scopeName;
     }
+
+    public function matches(string $scope): bool {
+        return true;
+    }
 }

lib/Scope/Parser.php

@@ -371,7 +371,7 @@ class Parser {
         }
 
         printf($message,
-            self::instance->debugCount++,
+            self::$instance->debugCount++,
             ltrim($methodTree, '->'),
             self::$instance->data->position,
             var_export(self::$instance->data->peek(), true)