From 8239698ad8f48bdc71c977896c1b843fea97be6a Mon Sep 17 00:00:00 2001
From: Dustin Wilson <dustin@dustinwilson.com>
Date: Wed, 9 Jun 2021 22:59:05 -0500
Subject: [PATCH] Started adding matching functionality

---
 lib/Scope/Matcher.php                 |  6 ++++-
 lib/Scope/Matchers/ScopeMatcher.php   | 39 +++++++++++++++++++++++++++
 lib/Scope/Matchers/SegmentMatcher.php |  4 +++
 lib/Scope/Matchers/TrueMatcher.php    |  4 +++
 lib/Scope/Parser.php                  |  2 +-
 5 files changed, 53 insertions(+), 2 deletions(-)

diff --git a/lib/Scope/Matcher.php b/lib/Scope/Matcher.php
index de2d285..3f42780 100644
--- a/lib/Scope/Matcher.php
+++ b/lib/Scope/Matcher.php
@@ -6,4 +6,8 @@
 declare(strict_types=1);
 namespace dW\Highlighter\Scope;
 
-abstract class Matcher {}
\ No newline at end of file
+abstract class Matcher {
+    public function getPrefix(string $scope) {
+        return null;
+    }
+}
\ No newline at end of file
diff --git a/lib/Scope/Matchers/ScopeMatcher.php b/lib/Scope/Matchers/ScopeMatcher.php
index 5bf614c..e1284b3 100644
--- a/lib/Scope/Matchers/ScopeMatcher.php
+++ b/lib/Scope/Matchers/ScopeMatcher.php
@@ -12,4 +12,43 @@ class ScopeMatcher extends Matcher {
     public function __construct(SegmentMatcher|TrueMatcher ...$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;
+                }
+            }
+        }
+    }
 }
diff --git a/lib/Scope/Matchers/SegmentMatcher.php b/lib/Scope/Matchers/SegmentMatcher.php
index f043d8b..723668d 100644
--- a/lib/Scope/Matchers/SegmentMatcher.php
+++ b/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);
+    }
 }
diff --git a/lib/Scope/Matchers/TrueMatcher.php b/lib/Scope/Matchers/TrueMatcher.php
index dd34b04..2c94c9d 100644
--- a/lib/Scope/Matchers/TrueMatcher.php
+++ b/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;
+    }
 }
diff --git a/lib/Scope/Parser.php b/lib/Scope/Parser.php
index dabad04..dc63731 100644
--- a/lib/Scope/Parser.php
+++ b/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)