store and sort dates by timestamp not string (#38)

Author: Ravbug

source/create_dialog_derived.cpp

@@ -122,7 +122,7 @@ void CreateProjectDialogD::OnCreate(wxCommandEvent& event){
 			);
 		#endif
 		//TODO: return this command to what summoned this dialog
-		project p = {projName,e.name,"",filesystem::path(projPath) / filesystem::path(projName)};
+		project p = {projName,e.name,0,filesystem::path(projPath) / filesystem::path(projName)};
 		this->callback(command,p);
 
 		//close and dispose self

source/globals.cpp

@@ -23,6 +23,12 @@ ParsedVersion parseVersion(const std::string_view version) {
     return {};
 }
 
+
+std::string project::modifyDateString() const {
+    long reducedTime = modifiedDate;    //NOTE: 32-bit time precision loss
+    return ctime(&reducedTime);
+}
+
 void launch_process(const std::string& command, int flags) {
 #if defined __APPLE__ || defined __linux__
     //the '&' runs the command nonblocking, and >/dev/null 2>&1 destroys output

source/globals.h

@@ -133,11 +133,12 @@ struct editor {
 struct project {
 	std::string name;
 	std::string version;
-	std::string modifiedDate;
+	int64_t modifiedDate;
 	std::filesystem::path path;
 	bool operator==(const project& other) const {
 		return this->path == other.path;
 	}
+    std::string modifyDateString() const;
 };
 
 struct ParsedVersion {

source/interface_derived.cpp

@@ -509,11 +509,11 @@ project MainFrameDerived::LoadProject(const std::filesystem::path &p_as_fs){
 	}
 
 	//get the modification date
-	string modifyDate;
+	int64_t modifyDate;
 	struct stat fileInfo {};
 	if (filesystem::exists(p_as_fs)) {
 		if (stat(p_as_fs.string().c_str(), &fileInfo) == 0) {
-			modifyDate = ctime(&fileInfo.st_mtime);
+            modifyDate = fileInfo.st_mtime;
 		}
 	}
 
@@ -582,7 +582,7 @@ void MainFrameDerived::AddProject(const project& p, const std::string& filter, b
         projectsList->SetItemData(itemIndex, projectIndex);
 
         projectsList->SetItem(itemIndex, 1, p.version);
-        projectsList->SetItem(itemIndex, 2, p.modifiedDate);
+        projectsList->SetItem(itemIndex, 2, p.modifyDateString());
         projectsList->SetItem(itemIndex, 3, p.path.string());
 
         //resize columns
@@ -760,9 +760,7 @@ int wxCALLBACK MainFrameDerived::CompareItems(wxIntPtr item1, wxIntPtr item2, wx
             break;
         }
         case 2: // Last Modified
-            // Compare dates - note: string comparison may not work correctly for all date formats
-            // For dates, default to newest first (reverse the comparison)
-            result = p2.modifiedDate.compare(p1.modifiedDate);
+            result = int(std::clamp<int64_t>(p2.modifiedDate - p1.modifiedDate,-10,10));
             break;
         case 3: // Path
             result = p1.path.string().compare(p2.path.string());