From 9100d9bb0fc30df1046e58064e0293b13dbeda89 Mon Sep 17 00:00:00 2001
From: Aqua-sama <aqua@iserlohn-fortress.net>
Date: Wed, 19 Dec 2018 16:27:41 +0100
Subject: Add ContentsMatcher class

---
 lib/urlfilter/formats/adblockrule.cpp       |  1 +
 lib/urlfilter/formats/adblockrule.h         | 58 +++++++++++++++++++++++++++++
 lib/urlfilter/formats/adblockrule_parse.cpp |  2 +-
 lib/urlfilter/formats/adblockrule_parse.h   |  4 +-
 4 files changed, 62 insertions(+), 3 deletions(-)

(limited to 'lib/urlfilter')

diff --git a/lib/urlfilter/formats/adblockrule.cpp b/lib/urlfilter/formats/adblockrule.cpp
index db1c3c5..60e817f 100644
--- a/lib/urlfilter/formats/adblockrule.cpp
+++ b/lib/urlfilter/formats/adblockrule.cpp
@@ -45,6 +45,7 @@ bool AdBlockRule::match(const QUrl &requestUrl, QWebEngineUrlRequestInfo::Resour
         case FilterLeaf::RegularExpressionMatch:
             return (regExp->indexIn(requestUrl.toString()) != -1);
         default:
+            qWarning("Match type not implemented, returning false!");
             return false;
         }
     }
diff --git a/lib/urlfilter/formats/adblockrule.h b/lib/urlfilter/formats/adblockrule.h
index 9c89dac..3331cac 100644
--- a/lib/urlfilter/formats/adblockrule.h
+++ b/lib/urlfilter/formats/adblockrule.h
@@ -11,6 +11,64 @@
 
 #include "../filterleaf.h"
 #include <optional>
+#include <QRegularExpression>
+#include <QStringMatcher>
+
+template <typename T>
+class ContentsMatcher
+{
+public:
+    ContentsMatcher(const QString &pattern, FilterLeaf::UrlMatchType matchType)
+    {
+        this->matchType = matchType;
+        patternLength = pattern.length();
+        matcher.setPattern(pattern);
+
+        if constexpr(std::is_same_v<T, QRegularExpression>) {
+            matcher.setPatternOptions(matcher.patternOptions() | QRegularExpression::CaseInsensitiveOption);
+        } else if constexpr(std::is_same_v<T, QStringMatcher>) {
+            matcher.setCaseSensitivity(Qt::CaseInsensitive);
+        }
+    }
+
+    bool hasMatch(const QString &where) const
+    {
+        if constexpr(std::is_same_v<T, QStringMatcher>) {
+            switch (matchType) {
+            case FilterLeaf::InvalidMatch:
+            case FilterLeaf::RegularExpressionMatch:
+            case FilterLeaf::DomainMatch:
+                qWarning("ContentsMatcher is a String Matcher, but not doing string matching!");
+                return false;
+
+            case FilterLeaf::StringContains:
+                return (matcher.indexIn(where) != -1);
+
+            case FilterLeaf::StringStartsWith:
+                return (matcher.indexIn(where) == 0);
+
+            case FilterLeaf::StringEndsWith:
+                return (matcher.indexIn(where) == where.length() - patternLength);
+
+            case FilterLeaf::StringEquals:
+                return (matcher.indexIn(where) == 0) && (patternLength == where.length());
+            }
+
+        } else if constexpr(std::is_same_v<T, QRegularExpression>) {
+            if(matchType != FilterLeaf::RegularExpressionMatch)
+                qWarning("ContentsMatcher is a regular expression, but not doing a regular expression match!");
+            return matcher.match(where).hasMatch();
+        } else {
+            qWarning("Matcher has no backend, returning false");
+            return false;
+        }
+    }
+
+private:
+                int patternLength;
+    T matcher;
+    FilterLeaf::UrlMatchType matchType;
+};
 
 class AdBlockRule : public FilterLeaf
 {
diff --git a/lib/urlfilter/formats/adblockrule_parse.cpp b/lib/urlfilter/formats/adblockrule_parse.cpp
index 0e5bf05..927a6a3 100644
--- a/lib/urlfilter/formats/adblockrule_parse.cpp
+++ b/lib/urlfilter/formats/adblockrule_parse.cpp
@@ -16,7 +16,7 @@
 // QString::chop(len) - Removes n characters from the end of the string.
 // QString::remove(pos, len) - Removes n characters from the string, starting at the given position index.
 
-AdBlockRule *loadRule(const QString &filter)
+AdBlockRule *parseRule_adblock(const QString &filter)
 {
     QString parsedLine = filter.trimmed();
 
diff --git a/lib/urlfilter/formats/adblockrule_parse.h b/lib/urlfilter/formats/adblockrule_parse.h
index 7d380a8..01255ca 100644
--- a/lib/urlfilter/formats/adblockrule_parse.h
+++ b/lib/urlfilter/formats/adblockrule_parse.h
@@ -11,7 +11,7 @@
 
 class AdBlockRule;
 
-AdBlockRule *loadRule(const QString &filter);
+AdBlockRule *parseRule_adblock(const QString &filter);
 std::optional<QPair<QWebEngineUrlRequestInfo::ResourceType, bool>> parseOption(const QString &option);
 
-#endif // ADBLOCKRULE_PARSE_H
\ No newline at end of file
+#endif // ADBLOCKRULE_PARSE_H
-- 
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