applist: Create an original app.db.bkp before making other backups th…

…at are overwritten

README.md

@@ -13,7 +13,7 @@ I am not responsible for anything that happens to your device after the use of t
 - Sort app list alphabetically (ascending)
 - Sort app list alphabetically (descending)
 - Display app list after sorting is applied using ImGui's tables API.
-- Backup application database before sorting is applied.
+- Backup application database before sorting is applied. Note: Two backups are made. An original backup for first time use (`ux0:/data/VITAHomebrewSorter/backups/app.db.bkp`), and another backup which is overwritten everytime the sort functionality is used (`ux0:/data/VITAHomebrewSorter/backups/app.db`).
 - Custom loadouts to backup/restore. (Do note: If you install a new application after you've already backed up your loadout and then attempt to restore this loadout, the new application will not appear on LiveArea and a warning message will be displayed. You can work around this by overwriting your load out backups each time an app is installed or simple re-install the VPK. Although the new application's icon will not appear on LiveArea, its data should not be lost.)
 
 # Credits:

source/applist.cpp

@@ -189,7 +189,14 @@ namespace AppList {
     }
 
     int Backup(void) {
-        const std::string backup_path = "ux0:/data/VITAHomebrewSorter/backup/app.db";
+        // Create an original backup for first time use.
+        std::string backup_path;
+
+        if (!FS::FileExists("ux0:/data/VITAHomebrewSorter/backup/app.db.bkp"))
+            backup_path = "ux0:/data/VITAHomebrewSorter/backup/app.db.bkp";
+        else
+            backup_path = "ux0:/data/VITAHomebrewSorter/backup/app.db";
+
         unsigned char *data = nullptr;
         SceOff size = 0;
 
@@ -209,11 +216,17 @@ namespace AppList {
     }
 
     int Restore(void) {
+        std::string restore_path;
         unsigned char *data = nullptr;
         SceOff size = 0;
 
+        if (!FS::FileExists("ux0:/data/VITAHomebrewSorter/backup/app.db"))
+            restore_path = "ux0:/data/VITAHomebrewSorter/backup/app.db.bkp";
+        else
+            restore_path = "ux0:/data/VITAHomebrewSorter/backup/app.db";
+
         int ret = 0;
-        if (R_FAILED(ret = FS::ReadFile("ux0:/data/VITAHomebrewSorter/backup/app.db", &data, &size)))
+        if (R_FAILED(ret = FS::ReadFile(restore_path.c_str(), &data, &size)))
             return ret;
 
         if (FS::FileExists(path)) {

source/gui.cpp

@@ -210,7 +210,7 @@ namespace GUI {
 
     int RenderLoop(void) {
         bool done = false;
-        backupExists = FS::FileExists("ux0:/data/VITAHomebrewSorter/backup/app.db");
+        backupExists = (FS::FileExists("ux0:/data/VITAHomebrewSorter/backup/app.db") || FS::FileExists("ux0:/data/VITAHomebrewSorter/backup/app.db.bkp"));
         std::vector<AppInfoIcon> apps;
         std::vector<AppInfoPage> pages;
         std::vector<AppInfoFolder> folders;