From abdaf8cfae8d5749ada4f73234074696f2d57634 Mon Sep 17 00:00:00 2001
From: Aqua-sama <aqua@iserlohn-fortress.net>
Date: Sun, 16 Feb 2020 16:27:59 +0200
Subject: staging/adblock: implement FilterList::isUpToDate

---
 staging/adblock/filterlist.cpp  | 34 +++++++++++++++++++++++++++-------
 staging/adblock/filterlist.h    | 20 +++++++++++++++++---
 staging/adblock/meson.build     |  3 ++-
 staging/adblock/test/parser.cpp |  7 ++++---
 4 files changed, 50 insertions(+), 14 deletions(-)

diff --git a/staging/adblock/filterlist.cpp b/staging/adblock/filterlist.cpp
index be2bd4e..9fb53ad 100644
--- a/staging/adblock/filterlist.cpp
+++ b/staging/adblock/filterlist.cpp
@@ -14,19 +14,18 @@
 /**
  * Documentation:
  *
- * https://help.eyeo.com/en/adblockplus/how-to-write-filters
+ * https://adblockplus.org/filter-cheatsheet
+ * https://help.eyeo.com/adblockplus/how-to-write-filters
  *
  * https://github.com/gorhill/uBlock/wiki/Introduction-to-basic-filtering-syntax
  * https://github.com/gorhill/uBlock/wiki/Static-filter-syntax
  *
  */
 
-using namespace AdblockPlus;
+const QLatin1String comment_lastModified("! Last modified: ");
+const QLatin1String comment_expires("! Expires: ");
 
-FilterList::FilterList(QObject *parent)
-    : QObject(parent)
-{
-}
+using namespace AdblockPlus;
 
 FilterList::~FilterList()
 {
@@ -77,7 +76,18 @@ FilterList::ParseResult FilterList::parse(QTextStream &stream)
 
 void FilterList::parseComment(QString &line)
 {
-    m_comments.append(line);
+    if(line.startsWith(comment_lastModified)) {
+        lastModified = QDateTime::fromString(line.mid(comment_lastModified.size()), "dd MMM yyyy HH:mm 'UTC'");
+        expires = lastModified;
+
+    } else if(line.startsWith(comment_expires)) {
+        const QRegularExpression time_re("(?:(\\d+) days)|(?:(\\d+) hours)");
+        const auto match = time_re.match(line);
+        if(match.hasMatch()) {
+            expires = expires.addDays(match.captured(1).toInt());
+            expires = expires.addSecs(match.captured(2).toInt() * 60 * 60);
+        }
+    }
 }
 
 bool FilterList::parseRule(const QString &line)
@@ -135,3 +145,13 @@ bool FilterList::parseRule(const QString &line)
 
     return true;
 }
+
+void FilterList::filter(QWebEngineUrlRequestInfo &info) const
+{
+}
+
+bool FilterList::isUpToDate() const
+{
+    const auto current = QDateTime::currentDateTime();
+    return expires > current;
+}
diff --git a/staging/adblock/filterlist.h b/staging/adblock/filterlist.h
index 3ee18b3..59717af 100644
--- a/staging/adblock/filterlist.h
+++ b/staging/adblock/filterlist.h
@@ -6,6 +6,8 @@
  * SPDX-License-Identifier: GPL-3.0
  */
 
+#include "filterinterface.h"
+#include <QDateTime>
 #include <QObject>
 #include <QString>
 #include <QStringList>
@@ -16,12 +18,12 @@ class QTextStream;
 namespace AdblockPlus
 {
 class Rule;
-class FilterList : public QObject
+class FilterList : public Filter
 {
     Q_DISABLE_COPY(FilterList)
 
 public:
-    explicit FilterList(QObject *parent = nullptr);
+    explicit FilterList() = default;
     ~FilterList();
 
     enum ParseResultState {
@@ -39,11 +41,23 @@ public:
     };
     ParseResult parse(QTextStream &stream);
 
+    void filter(QWebEngineUrlRequestInfo &info) const override;
+    bool isUpToDate() const override;
+    QDateTime modified() const
+    {
+        return lastModified;
+    }
+    QDateTime expiresOn() const
+    {
+        return expires;
+    }
+
 private:
     void parseComment(QString &line);
     bool parseRule(const QString &line);
 
-    QStringList m_comments;
+    QDateTime lastModified;
+    QDateTime expires;
     QVector<Rule *> m_rules;
 };
 
diff --git a/staging/adblock/meson.build b/staging/adblock/meson.build
index 1fc4c65..f797607 100644
--- a/staging/adblock/meson.build
+++ b/staging/adblock/meson.build
@@ -1,8 +1,9 @@
 dep_adblockfilter = declare_dependency(
   include_directories: include_directories('.'),
+  dependencies: dep_plugininterface,
   link_with: static_library('adblockfilter',
     [ 'filterlist.cpp', 'rule.cpp', 'options.cpp' ],
-    dependencies: dep_qt5
+    dependencies: [ dep_qt5, dep_plugininterface ]
   )
 )
 
diff --git a/staging/adblock/test/parser.cpp b/staging/adblock/test/parser.cpp
index 0ce1121..2d2e59e 100644
--- a/staging/adblock/test/parser.cpp
+++ b/staging/adblock/test/parser.cpp
@@ -20,11 +20,12 @@ int main(int argc, char **argv)
         QTextStream stream(&f);
         const auto result = list.parse(stream);
         qDebug("[%s]: %s", argv[i], (result.state == AdblockPlus::FilterList::Ok) ? "okay" : "failed");
-        qDebug("   total: %i", result.lines_total);
-        qDebug("comments: %i", result.lines_comments);
-        qDebug(" ignored: %i", result.lines_ignored);
+        qDebug("   total: %i\t\tmodified: %s", result.lines_total, qUtf8Printable(list.modified().toString()));
+        qDebug("comments: %i\t\t expires: %s", result.lines_comments, qUtf8Printable(list.expiresOn().toString()));
+        qDebug(" ignored: %i\t\t   valid: %s", result.lines_ignored, list.isUpToDate() ? "yes" : "no");
         qDebug("  parsed: %i", result.lines_parsed);
         qDebug("  failed: %i", result.lines_failed);
+        qDebug("--------  --------");
 
         f.close();
     }
-- 
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