FilterWidget takes a predicate to match strings

copied the logic from modlistsortproxy so the basic boolean syntax in filters works

3 files changed, 42 insertions, 7 deletions

diff --git a/src/filterwidget.cpp b/src/filterwidget.cpp
index 7c47980e..16a46b0e 100644
--- a/src/filterwidget.cpp
+++ b/src/filterwidget.cpp
@@ -30,9 +30,39 @@ void FilterWidget::clear()
   m_edit->clear();
 }
 
-bool FilterWidget::matches(const QString& s) const
+bool FilterWidget::matches(std::function<bool (const QString& what)> pred) const
 {
-  return s.contains(m_text);
+  const QStringList ORList = [&] {
+    QString filterCopy = QString(m_text);
+    filterCopy.replace("||", ";").replace("OR", ";").replace("|", ";");
+    return filterCopy.split(";", QString::SkipEmptyParts);
+  }();
+
+  if (ORList.isEmpty() || !pred) {
+    return true;
+  }
+
+  // split in ORSegments that internally use AND logic
+  for (auto& ORSegment : ORList) {
+    QStringList ANDKeywords = ORSegment.split(" ", QString::SkipEmptyParts);
+    bool segmentGood = true;
+
+    // check each word in the segment for match, each word needs to be matched
+    // but it doesn't matter where.
+    for (auto& currentKeyword : ANDKeywords) {
+      if (!pred(currentKeyword)) {
+          segmentGood = false;
+      }
+    }
+
+    if (segmentGood) {
+      // the last AND loop didn't break so the ORSegments is true so mod
+      // matches filter
+      return true;
+    }
+  }
+
+  return false;
 }
 
 void FilterWidget::unhook()
diff --git a/src/filterwidget.h b/src/filterwidget.h
index ca731dc1..4fee5983 100644
--- a/src/filterwidget.h
+++ b/src/filterwidget.h
@@ -13,7 +13,7 @@ public:
   void set(QLineEdit* edit);
   void clear();
 
-  bool matches(const QString& s) const;
+  bool matches(std::function<bool (const QString& what)> pred) const;
 
 private:
   QLineEdit* m_edit;
diff --git a/src/modinfodialog.cpp b/src/modinfodialog.cpp
index 0f18033a..4852150f 100644
--- a/src/modinfodialog.cpp
+++ b/src/modinfodialog.cpp
@@ -874,10 +874,15 @@ QTreeWidgetItem* ModInfoDialog::createAdvancedConflictItem(
     }
   }
 
-  if (!m_advancedConflictFilter.matches(before) &&
-      !m_advancedConflictFilter.matches(relativeName) &&
-      !m_advancedConflictFilter.matches(after)) {
-      return nullptr;
+  bool matched = m_advancedConflictFilter.matches([&](auto&& what) {
+    return
+      before.contains(what, Qt::CaseInsensitive) ||
+      relativeName.contains(what, Qt::CaseInsensitive) ||
+      after.contains(what, Qt::CaseInsensitive);
+  });
+
+  if (!matched) {
+     return nullptr;
   }
 
   QTreeWidgetItem* item = new QTreeWidgetItem;