Start on URL normalizer

lib/Misc/URL.php

@@ -0,0 +1,66 @@
+<?php
+/** @license MIT
+ * Copyright 2017 J. King, Dustin Wilson et al.
+ * See LICENSE and AUTHORS files for details */
+
+declare(strict_types=1);
+namespace JKingWeb\Arsse\Misc;
+
+class URL {
+    public static function normalize(string $url, string $u = null, string $p = null): string {
+        extract(parse_url($url));
+        if (!isset($scheme) || !isset($host) || !strlen($host)) {
+            return $url;
+        }
+        $out = strtolower($scheme)."://";
+        if (strlen($u ?? "")) {
+            $out .= self::normalizePart($u, self::P_USER, false);
+            if (strlen($p ?? "")) {
+                $out .= ":".self::normalizePart($p, self::P_PASS, false);
+            }
+            $out .= "@";
+        } elseif (strlen($username ?? "")) {
+            $out .= self::normalizePart($username, self::P_USER);
+            if (strlen($password ?? "")) {
+                $out .= ":".self::normalizePart($username, self::P_PASS);
+            }
+            $out .= "@";
+        }
+        if ($host[0] === "[") {
+            $out .= self::normalizeIPv6($host);
+        } else {
+            $out .= self::normalizeHost($host);
+        }
+        if (isset($path)) {
+            $out .= self::normalizePath($path);
+        } else {
+            $out .= "/";
+        }
+        if (isset($query) && strlen($query)) {
+            $out .= "?".self::normalizePart($query, self::P_QUERY);
+        }
+        return $out;
+    }
+
+    protected static function normalizePart(string $part, int $type, bool $passthrough_encoded = true): string {
+        // stub
+        return $part;
+    }
+
+    protected static function normalizeHost(string $host): string {
+        // stub
+        return $host;
+    }
+
+    protected static function normalizeIPv6(string $addr): string {
+        // stub
+        return $addr;
+    }
+
+    protected static function normalizePath(string $path): string {
+        // stub
+        return $path;
+    }
+
+
+}

tests/cases/Misc/TestURL.php

@@ -0,0 +1,31 @@
+<?php
+/** @license MIT
+ * Copyright 2017 J. King, Dustin Wilson et al.
+ * See LICENSE and AUTHORS files for details */
+
+declare(strict_types=1);
+namespace JKingWeb\Arsse\TestCase\Misc;
+
+use JKingWeb\Arsse\Misc\URL;
+
+/** @covers \JKingWeb\Arsse\Misc\URL */
+class TestURL extends \JKingWeb\Arsse\Test\AbstractTest {
+    public function setUp() {
+        self::clearData();
+    }
+    
+    /** @dataProvider provideNormalizations */
+    public function testNormalizeAUrl(string $in, string $exp) {
+        $this->assertSame($exp, URL::normalize($in));
+    }
+
+    public function provideNormalizations() {
+        return [
+            ["/",                   "/"],
+            ["//example.com/",      "//example.com/"],
+            ["http://example.com/", "http://example.com/"],
+            ["http://[::1]/",       "http://[::1]/"],
+            ["HTTP://example.com/", "http://example.com/"],
+        ];
+    }
+}

tests/phpunit.dist.xml

@@ -46,6 +46,7 @@
         <file>cases/Misc/TestValueInfo.php</file>
         <file>cases/Misc/TestDate.php</file>
         <file>cases/Misc/TestContext.php</file>
+        <file>cases/Misc/TestURL.php</file>
     </testsuite>
     <testsuite name="User management">
         <file>cases/User/TestInternal.php</file>