Merge pull request #516 from flightphp/aliasing-adjustments

fixed alias issue, levenshtein recommendations and coverage-check

.gitignore

@@ -7,3 +7,4 @@ coverage/
 .vscode/settings.json
 *.sublime-workspace
 .vscode/
+clover.xml

composer.json

@@ -36,7 +36,8 @@
 		"ext-pdo_sqlite": "*",
         "phpunit/phpunit": "^9.5",
         "phpstan/phpstan": "^1.10",
-        "phpstan/extension-installer": "^1.3"
+        "phpstan/extension-installer": "^1.3",
+        "rregeer/phpunit-coverage-check": "^0.3.1"
     },
     "config": {
         "allow-plugins": {
@@ -45,7 +46,7 @@
     },
     "scripts": {
         "test": "phpunit",
-		"test-coverage": "XDEBUG_MODE=coverage vendor/bin/phpunit --coverage-html=coverage",
+		"test-coverage": "XDEBUG_MODE=coverage vendor/bin/phpunit --coverage-html=coverage --coverage-clover=clover.xml && vendor/bin/coverage-check clover.xml 100",
         "lint": "phpstan --no-progress -cphpstan.neon"
     },
     "suggest": {

flight/net/Router.php

@@ -190,14 +190,32 @@ class Router
 	 * @return string
 	 */
 	public function getUrlByAlias(string $alias, array $params = []): string {
-		while ($route = $this->current()) {
+		$potential_aliases = [];
-            if ($route->matchAlias($alias)) {
+		foreach($this->routes as $route) {
-                return $route->hydrateUrl($params);
+			$potential_aliases[] = $route->alias;
-            }
+			if ($route->matchAlias($alias)) {
-            $this->next();
+				return $route->hydrateUrl($params);
-        }
+			}
+
+		}
+
+		// use a levenshtein to find the closest match and make a recommendation
+		$closest_match = '';
+		$closest_match_distance = 0;
+		foreach($potential_aliases as $potential_alias) {
+			$levenshtein_distance = levenshtein($alias, $potential_alias);
+			if($levenshtein_distance > $closest_match_distance) {
+				$closest_match = $potential_alias;
+				$closest_match_distance = $levenshtein_distance;
+			}
+		}
+
+		$exception_message = 'No route found with alias: \'' . $alias . '\'.';
+		if($closest_match !== '') {
+			$exception_message .= ' Did you mean \'' . $closest_match . '\'?';
+		}
 		
-		throw new Exception('No route found with alias: ' . $alias);
+		throw new Exception($exception_message);
 	}
 
 	/**

tests/RouterTest.php

@@ -469,6 +469,13 @@ class RouterTest extends PHPUnit\Framework\TestCase
         $this->check('123abc');
     }
 	
+	public function testGetUrlByAliasBadReferenceButCatchRecommendation() {
+		$this->router->map('/path1', [$this, 'ok'], false, 'path1');
+		$this->expectException(\Exception::class);
+		$this->expectExceptionMessage('No route found with alias: \'path2\'. Did you mean \'path1\'?');
+		$this->router->getUrlByAlias('path2');
+	}
+
 	public function testRewindAndValid() {
 		$this->router->map('/path1', [$this, 'ok']);
 		$this->router->map('/path2', [$this, 'ok']);
@@ -491,7 +498,7 @@ class RouterTest extends PHPUnit\Framework\TestCase
 	public function testGetUrlByAliasNoMatches() {
 		$this->router->map('/path1', [$this, 'ok'], false, 'path1');
 		$this->expectException(\Exception::class);
-		$this->expectExceptionMessage('No route found with alias: path2');
+		$this->expectExceptionMessage('No route found with alias: \'path2\'');
 		$this->router->getUrlByAlias('path2');
 	}