Add empty ROM folder tool to Configurator

https://github.com/XargonWan/RetroDECK/issues/796

functions/configurator_functions.sh

@@ -31,3 +31,34 @@ check_bios_files() {
       fi
   done < $bios_checklist
 }
+
+find_empty_rom_folders() {
+  # This function will build an array of all the system subfolders in $roms_folder which are either empty or contain only systeminfo.txt for easy removal
+
+  if [[ -f "$godot_empty_roms_folders" ]]; then
+    rm -f "$godot_empty_roms_folders" # Godot data transfer temp files
+  fi
+  touch "$godot_empty_roms_folders"
+
+  empty_rom_folders_list=()
+  all_empty_folders=()
+
+  for system in $(find "$roms_folder" -mindepth 1 -maxdepth 1 -type d -printf '%f\n')
+  do
+    local dir="$roms_folder/$system"
+    local files=$(ls -A1 "$dir")
+    local count=$(ls -A "$dir" | wc -l)
+
+    if [[ $count -eq 0 ]]; then
+        # Directory is empty
+        empty_rom_folders_list=("${empty_rom_folders_list[@]}" "false" "$(realpath $dir)")
+        all_empty_folders=("${all_empty_folders[@]}" "$(realpath $dir)")
+        echo "$(realpath $dir)" >> "$godot_empty_roms_folders" # Godot data transfer temp file
+    elif [[ $count -eq 1 ]] && [[ "$(basename "${files[0]}")" == "systeminfo.txt" ]]; then
+        # Directory contains only systeminfo.txt
+        empty_rom_folders_list=("${empty_rom_folders_list[@]}" "false" "$(realpath $dir)")
+        all_empty_folders=("${all_empty_folders[@]}" "$(realpath $dir)")
+        echo "$(realpath $dir)" >> "$godot_empty_roms_folders" # Godot data transfer temp file
+    fi
+  done
+}

functions/global.sh

@@ -55,6 +55,7 @@ pretty_system_names_reference_list="$emuconfigs/defaults/retrodeck/reference_lis
 godot_bios_files_checked="/var/config/retrodeck/godot/godot_bios_files_checked.tmp"
 godot_current_preset_settings="/var/config/retrodeck/godot/godot_current_preset_settings.tmp"
 godot_compression_compatible_games="/var/config/retrodeck/godot/godot_compression_compatible_games.tmp"
+godot_empty_roms_folders="/var/config/retrodeck/godot/godot_empty_roms_folders.tmp"
 
 # Config files for emulators with single config files
 

tools/configurator.sh

@@ -52,6 +52,7 @@ source /app/libexec/global.sh
 #         - Move Screenshots folder
 #         - Move Mods folder
 #         - Move Texture Packs folder
+#       - Tool: Remove Empty ROM Folders
 #       - Tool: Compress Games
 #         - Compress Single Game
 #         - Compress Multiple Games - CHD
@@ -559,6 +560,7 @@ configurator_retrodeck_tools_dialog() {
 
   local choices=(
   "Tool: Move Folders" "Move RetroDECK folders between internal/SD card or to a custom location"
+  "Tool: Remove Empty ROM Folders" "Remove some or all of the empty ROM folders"
   "Tool: Compress Games" "Compress games for systems that support it"
   "Install: RetroDECK Controller Layouts" "Install the custom RetroDECK controller layouts on Steam"
   "Install: PS3 Firmware" "Download and install PS3 firmware for use with the RPCS3 emulator"
@@ -585,6 +587,34 @@ configurator_retrodeck_tools_dialog() {
     configurator_retrodeck_move_tool_dialog
   ;;
 
+  "Tool: Remove Empty ROM Folders" )
+    log i "Configurator: opening \"$choice\" menu"
+    find_empty_rom_folders
+
+    choice=$(zenity \
+        --list --width=1200 --height=720 --title "RetroDECK Configurator - RetroDECK: Remove Empty ROM Folders" \
+        --checklist --hide-column=3 --ok-label="Remove Selected" --extra-button="Remove All" \
+        --separator="," --print-column=2 \
+        --text="Choose which ROM folders to remove:" \
+        --column "Remove?" \
+        --column "System" \
+        "${empty_rom_folders_list[@]}")
+    
+    local rc=$?
+    if [[ $rc == "0" && ! -z $choice ]]; then # User clicked "Remove Selected" with at least one system selected
+      IFS="," read -ra folders_to_remove <<< "$choice"
+      for folder in "${folders_to_remove[@]}"; do
+        log i "Removing empty folder $folder"
+        rm -f "$folder"
+      done
+    elif [[ ! -z $choice ]]; then # User clicked "Remove All"
+      for folder in "${all_empty_folders[@]}"; do
+        log i "Removing empty folder $folder"
+        rm -f "$folder"
+      done
+    fi
+  ;;
+
   "Tool: Compress Games" )
     log i "Configurator: opening \"$choice\" menu"
     configurator_generic_dialog "RetroDECK Configurator - Compression Tool" "Depending on your library and compression choices, the process can sometimes take a long time.\nPlease be patient once it is started!"