[core/filesystem] "easier" cheats folder structure like Ryujinx (#2795)

Less annoying way to make cheats

Signed-off-by: lizzie <lizzie@eden-emu.dev>

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/2795
Co-authored-by: lizzie <lizzie@eden-emu.dev>
Co-committed-by: lizzie <lizzie@eden-emu.dev>

docs/User.md

@@ -9,3 +9,4 @@ This handbook is primarily aimed at the end-user - baking useful knowledge for e
 - **[Graphics](user/Graphics.md)**
 - **[Platforms and Architectures](user/Architectures.md)**
 - **[Testing](user/Testing.md)**
+- **[Data, savefiles and storage](user/Storage.md)**

docs/user/Storage.md

@@ -0,0 +1,39 @@
+# User Handbook - Data, savefiles and storage
+
+## Cheats
+
+Cheats can be placed in the two manners:
+
+**Method 1**:
+- Right click on "Open mod directory"
+- Create a file called `cheat_mycheat.txt` (the file must start with `cheat_` to be recognized as one)
+- Write the cheat into said text file
+- Done
+
+This method doesn't account for build IDs, so any cheats for previous builds will not be automatically filtered out.
+
+**Method 2**:
+- Right click on "Open mod directory"
+- Create a folder called `My cheat`
+- Inside said folder create another one: `cheats`
+- Then inside said folder create a file with the build ID in hexadecimal, lowercase, for example `1234FBCDE0000000.txt`
+- Write the cheat into said text file
+- Done
+
+To delete a cheat simply do the process backwards (delete the folder/file).
+
+## Savefiles
+
+The method to access save data is simple:
+- Right click on "Open save directory"
+
+## Maintaining a library
+
+### ZFS
+
+One of the best ways to keep a gallery of archives is using a ZFS pool compressed with zstd.
+```sh
+sudo zfs create zroot/switch`
+sudo zfs set compression=zstd zroot/switch
+```
+A new ZFS dataset will then be available on `/zroot/switch`. From which then can be added as a normal game directory. Remember to ensure proper permissions with `chmod 755 /zroot/switch/*`.

src/core/file_sys/patch_manager.cpp

@@ -316,8 +316,7 @@ bool PatchManager::HasNSOPatch(const BuildID& build_id_, std::string_view name)
     return !CollectPatches(patch_dirs, build_id).empty();
 }
 
-std::vector<Core::Memory::CheatEntry> PatchManager::CreateCheatList(
-    const BuildID& build_id_) const {
+std::vector<Core::Memory::CheatEntry> PatchManager::CreateCheatList(const BuildID& build_id_) const {
     const auto load_dir = fs_controller.GetModificationLoadRoot(title_id);
     if (load_dir == nullptr) {
         LOG_ERROR(Loader, "Cannot load mods for invalid title_id={:016X}", title_id);
@@ -326,28 +325,36 @@ std::vector<Core::Memory::CheatEntry> PatchManager::CreateCheatList(
 
     const auto& disabled = Settings::values.disabled_addons[title_id];
     auto patch_dirs = load_dir->GetSubdirectories();
-    std::sort(patch_dirs.begin(), patch_dirs.end(),
-              [](const VirtualDir& l, const VirtualDir& r) { return l->GetName() < r->GetName(); });
+    std::sort(patch_dirs.begin(), patch_dirs.end(), [](auto const& l, auto const& r) { return l->GetName() < r->GetName(); });
 
+    // <mod dir> / <folder> / cheats / <build id>.txt
     std::vector<Core::Memory::CheatEntry> out;
     for (const auto& subdir : patch_dirs) {
-        if (std::find(disabled.cbegin(), disabled.cend(), subdir->GetName()) != disabled.cend()) {
-            continue;
-        }
-
-        auto cheats_dir = FindSubdirectoryCaseless(subdir, "cheats");
-        if (cheats_dir != nullptr) {
-            if (const auto res = ReadCheatFileFromFolder(title_id, build_id_, cheats_dir, true)) {
-                std::copy(res->begin(), res->end(), std::back_inserter(out));
-                continue;
+        if (std::find(disabled.cbegin(), disabled.cend(), subdir->GetName()) == disabled.cend()) {
+            if (auto cheats_dir = FindSubdirectoryCaseless(subdir, "cheats"); cheats_dir != nullptr) {
+                if (auto const res = ReadCheatFileFromFolder(title_id, build_id_, cheats_dir, true))
+                    std::copy(res->begin(), res->end(), std::back_inserter(out));
+                if (auto const res = ReadCheatFileFromFolder(title_id, build_id_, cheats_dir, false))
+                    std::copy(res->begin(), res->end(), std::back_inserter(out));
             }
-
-            if (const auto res = ReadCheatFileFromFolder(title_id, build_id_, cheats_dir, false)) {
-                std::copy(res->begin(), res->end(), std::back_inserter(out));
+        }
+    }
+    // Uncareless user-friendly loading of patches (must start with 'cheat_')
+    // <mod dir> / <cheat file>.txt
+    auto const patch_files = load_dir->GetFiles();
+    for (auto const& f : patch_files) {
+        auto const name = f->GetName();
+        if (name.starts_with("cheat_") && std::find(disabled.cbegin(), disabled.cend(), name) == disabled.cend()) {
+            std::vector<u8> data(f->GetSize());
+            if (f->Read(data.data(), data.size()) == data.size()) {
+                const Core::Memory::TextCheatParser parser;
+                auto const res = parser.Parse(std::string_view(reinterpret_cast<const char*>(data.data()), data.size()));
+                std::copy(res.begin(), res.end(), std::back_inserter(out));
+            } else {
+                LOG_INFO(Common_Filesystem, "Failed to read cheats file for title_id={:016X}", title_id);
             }
         }
     }
-
     return out;
 }