Game Downloader: Add ability to view compatible patches

functions/crc32.py

@@ -0,0 +1,11 @@
+#!/usr/bin/env python 
+import os, sys
+import zlib
+
+def crc32(fileName):
+    prev = 0
+    for eachLine in open(fileName,"rb"):
+        prev = zlib.crc32(eachLine, prev)
+    return "%X"%(prev & 0xFFFFFFFF)
+
+print(crc32(sys.argv[1]).lower())

functions/game_downloader.sh

@@ -0,0 +1,57 @@
+#!/bin/bash
+
+game_downloader_setup() {
+  crc32_cmd="python3 /app/libexec/crc32.py"
+
+  # "hacks" is the general name which includes ROM Hacks, Homebrew and Ports
+  hacks_repo_url="https://raw.githubusercontent.com/Libretto7/best-romhacks/main"
+  hacks_db_path="$HOME/.var/app/net.retrodeck.retrodeck/data/hacks_metadata.db"
+
+  # set up hacks database
+  sqlite3 $hacks_db_path < <(curl -sL "$hacks_repo_url"/db_setup.sql)
+
+  declare -g hacks_db_cmd="sqlite3 $hacks_db_path"
+}
+
+collect_base_rom_crc32s() {
+  # Register all crc32 checksums of potential base ROMs and their paths into the dictionary "base_roms"
+
+  declare -gA base_roms
+
+  for rom in ${roms_folder}/*/*; do
+    if [[ "$(basename "$rom")" != "systeminfo.txt" ]]; then
+      crc32="$($crc32_cmd "$rom")"
+      base_roms["$crc32"]="$rom"
+    fi
+  done
+}
+  
+build_patches_array() {
+  # Set up array that contains the names of patches compatible with available base ROMs
+  
+  declare -ga compatible_romhack_patches=()
+  
+  for base_crc32 in "${!base_roms[@]}"; do
+
+    current_base_compatible_patches="$($hacks_db_cmd "SELECT name FROM main WHERE base_crc32 = '""$base_crc32""'")"
+
+    if [[ ! -z "$(printf "$current_base_compatible_patches")" ]]; then # if there are compatible patches for this base
+      # Add available patches to array
+
+      # TODO: Remove redundancy within this line. Puts the patches names separated by newlines into an array
+      IFS='|' read -r -a array_of_compatible_patches <<< $(echo "$current_base_compatible_patches" | tr '\n' '|')
+
+      for patch in "${array_of_compatible_patches[@]}"; do
+        compatible_romhack_patches+=("$patch")
+      done
+    fi
+  done
+}
+
+get_compatible_romhacks() {
+  # Provide global array "compatible_romhack_patches" which contains names of available, compatible romhack patches
+
+  game_downloader_setup
+  collect_base_rom_crc32s
+  build_patches_array
+}

tools/configurator.sh

@@ -97,6 +97,7 @@ source /app/libexec/global.sh
 #       - Browse the wiki
 #       - USB Import tool
 #       - Install: RetroDECK Starter Pack
+#       - Game Downloader
 
 # DIALOG TREE FUNCTIONS
 
@@ -1176,7 +1177,8 @@ configurator_developer_dialog() {
   "Change Update Channel" "Change between normal and cooker builds" \
   "Browse the Wiki" "Browse the RetroDECK wiki online" \
   "USB Import" "Prepare a USB device for ROMs or import an existing collection" \
-  "Install RetroDECK Starter Pack" "Install the optional RetroDECK starter pack" )
+  "Install RetroDECK Starter Pack" "Install the optional RetroDECK starter pack" \
+  "Game Downloader" "Install ROM Hacks, Homebrew or Ports" )
 
   case $choice in
 
@@ -1204,6 +1206,10 @@ configurator_developer_dialog() {
     configurator_developer_dialog
   ;;
 
+  "Game Downloader" )
+    configurator_game_downloader_dialog
+  ;;
+
   "" ) # No selection made or Back button clicked
     configurator_welcome_dialog
   ;;
@@ -1355,6 +1361,64 @@ configurator_usb_import_dialog() {
 
 }
 
+configurator_game_downloader_dialog() {
+  choice=$(zenity --list --title="RetroDECK Configurator Utility - Game Downloader" --cancel-label="Back" \
+  --window-icon="/app/share/icons/hicolor/scalable/apps/net.retrodeck.retrodeck.svg" --width=1200 --height=720 \
+  --column="Choice" --column="Description" \
+  "ROM Hack Downloader" "Install ROM Hacks which are compatible with your ROMs (Right now: Only shows compatible ROMs with Super Mario World (USA) and Super Mario Bros. (World). Can't download.)" \
+  "Homebrew Downloader" "Install Homebrew (Not yet functional)" \
+  "Ports Downloader" "Install Ports (Not yet functional)" )
+
+  case $choice in
+
+  "ROM Hack Downloader" )
+    configurator_romhack_downloader_dialog
+  ;;
+
+  "Homebrew Downloader" )
+    configurator_developer_dialog
+  ;;
+
+  "Ports Downloader" )
+    configurator_developer_dialog
+  ;;
+
+  "" ) # No selection made or Back button clicked
+    configurator_welcome_dialog
+  ;;
+
+  esac
+}
+
+configurator_romhack_downloader_dialog() {
+
+  get_compatible_romhacks # creates compatible_romhack_patches array
+
+  zenity_columns=()
+  for hack_name in "${compatible_romhack_patches[@]}"; do
+
+    # Get romhack info
+    sanitized_name="$(echo "$hack_name" | sed -e "s/'/''/g")"
+    hack_info="$($hacks_db_cmd "SELECT released,retro_achievements,description FROM main WHERE name = '""$sanitized_name""'")"
+    IFS='|' read -r -a hack_info_array <<< "$hack_info"
+
+    # Add row of hack info
+    zenity_columns+=("$hack_name")
+    for info in "${hack_info_array[@]}"; do
+      zenity_columns+=("$info")
+    done
+  done
+
+  choice=$(zenity --list --title="RetroDECK Configurator Utility - Game Downloader: ROM Hacks" --cancel-label="Back" \
+  --window-icon="/app/share/icons/hicolor/scalable/apps/net.retrodeck.retrodeck.svg" --width=1200 --height=720 \
+  --column="ROM Hack Name" --column="Released" --column="Retro Achievements" --column="Description" \
+  "${zenity_columns[@]}" )
+
+  echo "$choice"
+
+  configurator_welcome_dialog
+}
+
 # START THE CONFIGURATOR
 
 configurator_welcome_dialog