urlfilter: add Domain class

(#6): Add domain matcher class

1 files changed, 61 insertions, 0 deletions

diff --git a/lib/urlfilter/domain.cpp b/lib/urlfilter/domain.cpp
new file mode 100644
index 0000000..3686210
--- /dev/null
+++ b/lib/urlfilter/domain.cpp
@@ -0,0 +1,61 @@
+/*
+ * This file is part of smolbote. It's copyrighted by the contributors recorded
+ * in the version control history of the file, available from its original
+ * location: https://neueland.iserlohn-fortress.net/gitea/aqua/smolbote
+ *
+ * SPDX-License-Identifier: GPL-3.0
+ */
+
+#include "domain.h"
+
+Domain::Domain(const QString& domain)
+    : m_domain(domain)
+    , m_hash(qHash(domain, 0))
+{
+}
+
+Domain::Domain(Domain && other)
+    : m_domain(std::move(other.m_domain))
+    , m_hash(std::move(other.m_hash))
+{
+}
+
+Domain & Domain::operator=(Domain && other)
+{
+    m_domain = std::move(other.m_domain);
+    m_hash = other.m_hash;
+    return *this;
+}
+
+bool Domain::matches(const QUrl& url) const
+{
+    const QString domain = url.host();
+
+    // domain and filter are the same
+    if(domain == m_domain) {
+        return true;
+    }
+
+    // domain cannot be matched if it doesn't end with filter
+    // ex. example2.com isn't matched by example.com
+    if(!domain.endsWith(m_domain)) {
+        return false;
+    }
+
+    // match with subdomains
+    // ex. subdomain.example.com is matched by example.com
+    int index = domain.indexOf(m_domain);
+
+    // match if (domain ends with filter) && (filter has been found) and (character before filter is '.')
+    return index > 0 && domain[index - 1] == QLatin1Char('.');
+}
+
+bool Domain::matchesExactly(uint hash) const
+{
+    return (m_hash == hash);
+}
+
+QString Domain::host() const
+{
+    return m_domain;
+}