From bd903b861d998004670b97acc66394e8195c70ac Mon Sep 17 00:00:00 2001
From: Kleo Dev <klesti.selimay@icloud.com>
Date: Sat, 23 Aug 2025 09:21:52 +0200
Subject: [PATCH] Some backend stuff

---
 src-tauri/Cargo.lock | 426 +++++++++++++++++++++++++++++++++++++++++++
 src-tauri/Cargo.toml |   1 +
 src-tauri/src/env.rs |  15 ++
 src-tauri/src/lib.rs |  77 +++++++-
 src/App.tsx          |  42 +----
 5 files changed, 522 insertions(+), 39 deletions(-)
 create mode 100644 src-tauri/src/env.rs

diff --git a/src-tauri/Cargo.lock b/src-tauri/Cargo.lock
index 1255698..babb427 100644
--- a/src-tauri/Cargo.lock
+++ b/src-tauri/Cargo.lock
@@ -17,6 +17,17 @@ version = "2.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "320119579fcad9c21884f5c4861d16174d0e06250625266f50fe6898340abefa"
 
+[[package]]
+name = "aes"
+version = "0.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b169f7a6d4742236a0a00c541b845991d0ac43e546831af1249753ab4c3aa3a0"
+dependencies = [
+ "cfg-if",
+ "cipher",
+ "cpufeatures",
+]
+
 [[package]]
 name = "aho-corasick"
 version = "1.1.3"
@@ -62,6 +73,15 @@ version = "1.0.99"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b0674a1ddeecb70197781e945de4b3b8ffb61fa939a5597bcf48503737663100"
 
+[[package]]
+name = "arbitrary"
+version = "1.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3d036a3c4ab069c7b410a2ce876bd74808d2d0888a82667669f8e783a898bf1"
+dependencies = [
+ "derive_arbitrary",
+]
+
 [[package]]
 name = "async-broadcast"
 version = "0.7.2"
@@ -358,6 +378,25 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "bzip2"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49ecfb22d906f800d4fe833b6282cf4dc1c298f5057ca0b5445e5c209735ca47"
+dependencies = [
+ "bzip2-sys",
+]
+
+[[package]]
+name = "bzip2-sys"
+version = "0.1.13+1.0.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "225bff33b2141874fe80d71e07d6eec4f85c5c216453dd96388240f96e1acc14"
+dependencies = [
+ "cc",
+ "pkg-config",
+]
+
 [[package]]
 name = "cairo-rs"
 version = "0.18.5"
@@ -431,6 +470,8 @@ version = "1.2.33"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3ee0f8803222ba5a7e2777dd72ca451868909b1ac410621b676adf07280e9b5f"
 dependencies = [
+ "jobserver",
+ "libc",
  "shlex",
 ]
 
@@ -481,11 +522,23 @@ checksum = "c469d952047f47f91b68d1cba3f10d63c11d73e4636f24f08daf0278abf01c4d"
 dependencies = [
  "android-tzdata",
  "iana-time-zone",
+ "js-sys",
  "num-traits",
  "serde",
+ "wasm-bindgen",
  "windows-link",
 ]
 
+[[package]]
+name = "cipher"
+version = "0.4.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "773f3b9af64447d2ce9850330c473515014aa235e6a783b02db81ff39e4a3dad"
+dependencies = [
+ "crypto-common",
+ "inout",
+]
+
 [[package]]
 name = "combine"
 version = "4.6.7"
@@ -505,6 +558,12 @@ dependencies = [
  "crossbeam-utils",
 ]
 
+[[package]]
+name = "constant_time_eq"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7c74b8349d32d297c9134b8c88677813a227df8f779daa29bfc29c183fe3dca6"
+
 [[package]]
 name = "convert_case"
 version = "0.4.0"
@@ -570,6 +629,21 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "crc"
+version = "3.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9710d3b3739c2e349eb44fe848ad0b7c8cb1e42bd87ee49371df2f7acaf3e675"
+dependencies = [
+ "crc-catalog",
+]
+
+[[package]]
+name = "crc-catalog"
+version = "2.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "19d374276b40fb8bbdee95aef7c7fa6b5316ec764510eb64b8dd0e2ed0d7e7f5"
+
 [[package]]
 name = "crc32fast"
 version = "1.5.0"
@@ -676,6 +750,12 @@ dependencies = [
  "syn 2.0.106",
 ]
 
+[[package]]
+name = "deflate64"
+version = "0.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "da692b8d1080ea3045efaab14434d40468c3d8657e42abddfffca87b428f4c1b"
+
 [[package]]
 name = "deranged"
 version = "0.4.0"
@@ -686,6 +766,17 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "derive_arbitrary"
+version = "1.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e567bd82dcff979e4b03460c307b3cdc9e96fde3d73bed1496d2bc75d9dd62a"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.106",
+]
+
 [[package]]
 name = "derive_more"
 version = "0.99.20"
@@ -707,6 +798,7 @@ checksum = "9ed9a281f7bc9b7576e61468ba615a66a5c8cfdff42420a70aa82701a3b1e292"
 dependencies = [
  "block-buffer",
  "crypto-common",
+ "subtle",
 ]
 
 [[package]]
@@ -1218,8 +1310,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "335ff9f135e4384c8150d6f27c6daed433577f86b4750418338c01a1a2528592"
 dependencies = [
  "cfg-if",
+ "js-sys",
  "libc",
  "wasi 0.11.1+wasi-snapshot-preview1",
+ "wasm-bindgen",
 ]
 
 [[package]]
@@ -1229,9 +1323,11 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "26145e563e54f2cadc477553f1ec5ee650b00862f0a58bcd12cbdc5f0ea2d2f4"
 dependencies = [
  "cfg-if",
+ "js-sys",
  "libc",
  "r-efi",
  "wasi 0.14.2+wasi-0.2.4",
+ "wasm-bindgen",
 ]
 
 [[package]]
@@ -1424,6 +1520,15 @@ version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
 
+[[package]]
+name = "hmac"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c49c37c09c17a53d937dfbb742eb3a961d65a994e6bcdcf37e7399d0cc8ab5e"
+dependencies = [
+ "digest",
+]
+
 [[package]]
 name = "html5ever"
 version = "0.29.1"
@@ -1699,6 +1804,15 @@ dependencies = [
  "cfb",
 ]
 
+[[package]]
+name = "inout"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "879f10e63c20629ecabbb64a8010319738c66a5cd0c29b02d63d272b03751d01"
+dependencies = [
+ "generic-array",
+]
+
 [[package]]
 name = "io-uring"
 version = "0.7.9"
@@ -1796,6 +1910,16 @@ version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8eaf4bc02d17cbdd7ff4c7438cafcdf7fb9a4613313ad11b4f8fefe7d3fa0130"
 
+[[package]]
+name = "jobserver"
+version = "0.1.33"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "38f262f097c174adebe41eb73d66ae9c06b2844fb0da69969647bbddd9b0538a"
+dependencies = [
+ "getrandom 0.3.3",
+ "libc",
+]
+
 [[package]]
 name = "js-sys"
 version = "0.3.77"
@@ -1935,6 +2059,27 @@ version = "0.4.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "13dc2df351e3202783a1fe0d44375f7295ffb4049267b0f3018346dc122a1d94"
 
+[[package]]
+name = "lzma-rs"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "297e814c836ae64db86b36cf2a557ba54368d03f6afcd7d947c266692f71115e"
+dependencies = [
+ "byteorder",
+ "crc",
+]
+
+[[package]]
+name = "lzma-sys"
+version = "0.1.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5fda04ab3764e6cde78b9974eec4f779acaba7c4e84b36eca3cf77c581b85d27"
+dependencies = [
+ "cc",
+ "libc",
+ "pkg-config",
+]
+
 [[package]]
 name = "mac"
 version = "0.1.1"
@@ -1972,6 +2117,12 @@ version = "0.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2532096657941c2fea9c289d370a250971c689d4f143798ff67113ec042024a5"
 
+[[package]]
+name = "md5"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "490cc448043f947bae3cbee9c203358d62dbee0db12107a74be5c30ccfd09771"
+
 [[package]]
 name = "memchr"
 version = "2.7.5"
@@ -2127,6 +2278,25 @@ dependencies = [
  "syn 2.0.106",
 ]
 
+[[package]]
+name = "oauth2"
+version = "5.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "51e219e79014df21a225b1860a479e2dcd7cbd9130f4defd4bd0e191ea31d67d"
+dependencies = [
+ "base64 0.22.1",
+ "chrono",
+ "getrandom 0.2.16",
+ "http",
+ "rand 0.8.5",
+ "serde",
+ "serde_json",
+ "serde_path_to_error",
+ "sha2",
+ "thiserror 1.0.69",
+ "url",
+]
+
 [[package]]
 name = "objc-sys"
 version = "0.3.5"
@@ -2467,6 +2637,16 @@ version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "df94ce210e5bc13cb6651479fa48d14f601d9858cfe0467f43ae157023b938d3"
 
+[[package]]
+name = "pbkdf2"
+version = "0.12.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8ed6a7761f76e3b9f92dfb0a60a6a6477c61024b775147ff0973a02653abaf2"
+dependencies = [
+ "digest",
+ "hmac",
+]
+
 [[package]]
 name = "percent-encoding"
 version = "2.3.2"
@@ -2988,6 +3168,20 @@ dependencies = [
  "web-sys",
 ]
 
+[[package]]
+name = "ring"
+version = "0.17.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a4689e6c2294d81e88dc6261c768b63bc4fcdb852be6d1352498b114f61383b7"
+dependencies = [
+ "cc",
+ "cfg-if",
+ "getrandom 0.2.16",
+ "libc",
+ "untrusted",
+ "windows-sys 0.52.0",
+]
+
 [[package]]
 name = "rustc-demangle"
 version = "0.1.26"
@@ -3016,6 +3210,41 @@ dependencies = [
  "windows-sys 0.60.2",
 ]
 
+[[package]]
+name = "rustls"
+version = "0.23.31"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c0ebcbd2f03de0fc1122ad9bb24b127a5a6cd51d72604a3f3c50ac459762b6cc"
+dependencies = [
+ "log",
+ "once_cell",
+ "ring",
+ "rustls-pki-types",
+ "rustls-webpki",
+ "subtle",
+ "zeroize",
+]
+
+[[package]]
+name = "rustls-pki-types"
+version = "1.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "229a4a4c221013e7e1f1a043678c5cc39fe5171437c88fb47151a21e6f5b5c79"
+dependencies = [
+ "zeroize",
+]
+
+[[package]]
+name = "rustls-webpki"
+version = "0.103.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0a17884ae0c1b773f1ccd2bd4a8c72f16da897310a98b0e84bf349ad5ead92fc"
+dependencies = [
+ "ring",
+ "rustls-pki-types",
+ "untrusted",
+]
+
 [[package]]
 name = "rustversion"
 version = "1.0.22"
@@ -3043,6 +3272,7 @@ version = "0.1.0"
 dependencies = [
  "serde",
  "serde_json",
+ "smallauncher_lib",
  "tauri",
  "tauri-build",
  "tauri-plugin-opener",
@@ -3186,6 +3416,16 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "serde_path_to_error"
+version = "0.1.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "59fab13f937fa393d08645bf3a84bdfe86e296747b506ada67bb15f10f218b2a"
+dependencies = [
+ "itoa",
+ "serde",
+]
+
 [[package]]
 name = "serde_repr"
 version = "0.1.20"
@@ -3291,6 +3531,17 @@ dependencies = [
  "stable_deref_trait",
 ]
 
+[[package]]
+name = "sha1"
+version = "0.10.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e3bf829a2d51ab4a5ddf1352d8470c140cadc8301b2ae1789db023f01cedd6ba"
+dependencies = [
+ "cfg-if",
+ "cpufeatures",
+ "digest",
+]
+
 [[package]]
 name = "sha2"
 version = "0.10.9"
@@ -3341,6 +3592,25 @@ version = "0.4.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7a2ae44ef20feb57a68b23d846850f861394c2e02dc425a50098ae8c90267589"
 
+[[package]]
+name = "smallauncher_lib"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bb1e378566b18d3c6bdf3abde36a666f24e6b6071004b3eb1b765f8b220c4dda"
+dependencies = [
+ "hex",
+ "log",
+ "md5",
+ "oauth2",
+ "open",
+ "serde",
+ "serde_json",
+ "sha1",
+ "ureq",
+ "uuid",
+ "zip",
+]
+
 [[package]]
 name = "smallvec"
 version = "1.15.1"
@@ -3448,6 +3718,12 @@ version = "0.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
 
+[[package]]
+name = "subtle"
+version = "2.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "13c2bddecc57b384dee18652358fb23172facb8a2c51ccc10d74c157bdea3292"
+
 [[package]]
 name = "swift-rs"
 version = "1.0.7"
@@ -4235,6 +4511,30 @@ version = "1.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f6ccf251212114b54433ec949fd6a7841275f9ada20dddd2f29e9ceea4501493"
 
+[[package]]
+name = "untrusted"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ecb6da28b8a351d773b68d5825ac39017e680750f980f3a1a85cd8dd28a47c1"
+
+[[package]]
+name = "ureq"
+version = "2.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "02d1a66277ed75f640d608235660df48c8e3c19f3b4edb6a263315626cc3c01d"
+dependencies = [
+ "base64 0.22.1",
+ "flate2",
+ "log",
+ "once_cell",
+ "rustls",
+ "rustls-pki-types",
+ "serde",
+ "serde_json",
+ "url",
+ "webpki-roots 0.26.11",
+]
+
 [[package]]
 name = "url"
 version = "2.5.5"
@@ -4493,6 +4793,24 @@ dependencies = [
  "system-deps",
 ]
 
+[[package]]
+name = "webpki-roots"
+version = "0.26.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "521bc38abb08001b01866da9f51eb7c5d647a19260e00054a8c7fd5f9e57f7a9"
+dependencies = [
+ "webpki-roots 1.0.2",
+]
+
+[[package]]
+name = "webpki-roots"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7e8983c3ab33d6fb807cfcdad2491c4ea8cbc8ed839181c7dfd9c67c83e261b2"
+dependencies = [
+ "rustls-pki-types",
+]
+
 [[package]]
 name = "webview2-com"
 version = "0.38.0"
@@ -4686,6 +5004,15 @@ dependencies = [
  "windows-targets 0.42.2",
 ]
 
+[[package]]
+name = "windows-sys"
+version = "0.52.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "282be5f36a8ce781fad8c8ae18fa3f9beff57ec1b52cb3de0789201425d9a33d"
+dependencies = [
+ "windows-targets 0.52.6",
+]
+
 [[package]]
 name = "windows-sys"
 version = "0.59.0"
@@ -5017,6 +5344,15 @@ dependencies = [
  "pkg-config",
 ]
 
+[[package]]
+name = "xz2"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "388c44dc09d76f1536602ead6d325eb532f5c122f17782bd57fb47baeeb767e2"
+dependencies = [
+ "lzma-sys",
+]
+
 [[package]]
 name = "yoke"
 version = "0.8.0"
@@ -5142,6 +5478,26 @@ dependencies = [
  "synstructure",
 ]
 
+[[package]]
+name = "zeroize"
+version = "1.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ced3678a2879b30306d323f4542626697a464a97c0a07c9aebf7ebca65cd4dde"
+dependencies = [
+ "zeroize_derive",
+]
+
+[[package]]
+name = "zeroize_derive"
+version = "1.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ce36e65b0d2999d2aafac989fb249189a141aee1f53c612c1f37d72631959f69"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.106",
+]
+
 [[package]]
 name = "zerotrie"
 version = "0.2.2"
@@ -5175,6 +5531,76 @@ dependencies = [
  "syn 2.0.106",
 ]
 
+[[package]]
+name = "zip"
+version = "2.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fabe6324e908f85a1c52063ce7aa26b68dcb7eb6dbc83a2d148403c9bc3eba50"
+dependencies = [
+ "aes",
+ "arbitrary",
+ "bzip2",
+ "constant_time_eq",
+ "crc32fast",
+ "crossbeam-utils",
+ "deflate64",
+ "displaydoc",
+ "flate2",
+ "getrandom 0.3.3",
+ "hmac",
+ "indexmap 2.10.0",
+ "lzma-rs",
+ "memchr",
+ "pbkdf2",
+ "sha1",
+ "thiserror 2.0.16",
+ "time",
+ "xz2",
+ "zeroize",
+ "zopfli",
+ "zstd",
+]
+
+[[package]]
+name = "zopfli"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "edfc5ee405f504cd4984ecc6f14d02d55cfda60fa4b689434ef4102aae150cd7"
+dependencies = [
+ "bumpalo",
+ "crc32fast",
+ "log",
+ "simd-adler32",
+]
+
+[[package]]
+name = "zstd"
+version = "0.13.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e91ee311a569c327171651566e07972200e76fcfe2242a4fa446149a3881c08a"
+dependencies = [
+ "zstd-safe",
+]
+
+[[package]]
+name = "zstd-safe"
+version = "7.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8f49c4d5f0abb602a93fb8736af2a4f4dd9512e36f7f570d66e65ff867ed3b9d"
+dependencies = [
+ "zstd-sys",
+]
+
+[[package]]
+name = "zstd-sys"
+version = "2.0.15+zstd.1.5.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eb81183ddd97d0c74cedf1d50d85c8d08c1b8b68ee863bdee9e706eedba1a237"
+dependencies = [
+ "cc",
+ "pkg-config",
+]
+
 [[package]]
 name = "zvariant"
 version = "5.6.0"
diff --git a/src-tauri/Cargo.toml b/src-tauri/Cargo.toml
index 79f6980..2de4cd1 100644
--- a/src-tauri/Cargo.toml
+++ b/src-tauri/Cargo.toml
@@ -22,4 +22,5 @@ tauri = { version = "2", features = [] }
 tauri-plugin-opener = "2"
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
+smallauncher_lib = "0.1.1"
 
diff --git a/src-tauri/src/env.rs b/src-tauri/src/env.rs
new file mode 100644
index 0000000..859b9ac
--- /dev/null
+++ b/src-tauri/src/env.rs
@@ -0,0 +1,15 @@
+use smallauncher_lib::path;
+use std::env;
+use std::path;
+
+#[cfg(target_family = "unix")]
+pub fn get_data_folder() -> Result<path::PathBuf, env::VarError> {
+    let home = env::var("HOME")?;
+    Ok(path!(home, ".saturn-launcher"))
+}
+
+#[cfg(target_family = "windows")]
+pub fn get_data_folder() -> Result<path::PathBuf, env::VarError> {
+    let env = env::var("APPDATA")?;
+    Ok(path!(env, ".saturn-launcher"))
+}
diff --git a/src-tauri/src/lib.rs b/src-tauri/src/lib.rs
index 4a277ef..bc7772e 100644
--- a/src-tauri/src/lib.rs
+++ b/src-tauri/src/lib.rs
@@ -1,14 +1,83 @@
-// Learn more about Tauri commands at https://tauri.app/develop/calling-rust/
+/*
+Resources:
+    - https://tauri.app/develop/calling-rust/
+*/
+
+use smallauncher_lib::path;
+
+pub mod env;
+
 #[tauri::command]
-fn greet(name: &str) -> String {
-    format!("Hello, {}! You've been greeted from Rust!", name)
+fn authenticate() {
+    let base_path = env::get_data_folder().expect("error get folder game");
+    let auth_path = path!(&base_path, "auth");
+
+    match smallauncher_lib::auth::auth_microsoft() {
+        Ok(auth) => match smallauncher_lib::auth::save(&auth_path, &auth) {
+            Ok(_) => println!("Authentication successful."),
+            Err(e) => println!("Failed to save authentication: {:?}", e),
+        },
+        Err(e) => println!("Authentication failed: {:?}", e),
+    }
+}
+
+#[tauri::command]
+fn download(version: &str) {
+    let base_path = env::get_data_folder().expect("error get folder game");
+    let game_path = path!(&base_path, "minecraft");
+    let jre_path = path!(&base_path, "jre");
+
+    match smallauncher_lib::download::download_minecraft_version(&game_path, &jre_path, &version) {
+        Ok(_) => println!("Download completed!"),
+        Err(e) => println!("Download failed: {:?}", e),
+    }
+}
+
+#[tauri::command]
+fn check_version(version: &str) {
+    let base_path = env::get_data_folder().expect("error get folder game");
+    let game_path = path!(&base_path, "minecraft");
+
+    if smallauncher_lib::launch::check_version_integrity(&game_path, &version) {
+        println!("Version {version} is ok");
+    } else {
+        println!("Version {version} is not ok");
+    }
+}
+
+#[tauri::command]
+fn launch_minecraft(username: &str, version: &str) {
+    let base_path = env::get_data_folder().expect("error get folder game");
+    let auth_path = path!(&base_path, "auth");
+    let game_path = path!(&base_path, "minecraft");
+    let jre_path = path!(&base_path, "jre");
+
+    let auth = match smallauncher_lib::auth::load(&auth_path, &username) {
+        Ok(Some(auth)) => auth,
+        Ok(None) => smallauncher_lib::auth::auth_offline("test_idk"),
+        Err(e) => {
+            println!("Failed to load authentication: {:?}", e);
+            return;
+        }
+    };
+
+    match smallauncher_lib::launch::launch_minecraft_version(&game_path, &jre_path, &version, &auth)
+    {
+        Ok(_) => println!("Game launched successfully."),
+        Err(e) => println!("Failed to launch game: {:?}", e),
+    }
 }
 
 #[cfg_attr(mobile, tauri::mobile_entry_point)]
 pub fn run() {
     tauri::Builder::default()
         .plugin(tauri_plugin_opener::init())
-        .invoke_handler(tauri::generate_handler![greet])
+        .invoke_handler(tauri::generate_handler![
+            authenticate,
+            download,
+            check_version,
+            launch_minecraft
+        ])
         .run(tauri::generate_context!())
         .expect("error while running tauri application");
 }
diff --git a/src/App.tsx b/src/App.tsx
index 42d0959..9cd16aa 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,30 +1,11 @@
-import { useState } from "react";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
-import { Progress } from "@/components/ui/progress";
 import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
 import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
 import { LogOut, Play, Settings, User } from "lucide-react";
+import { invoke } from '@tauri-apps/api/core';
 
 export default function App() {
-  const [progress, setProgress] = useState(0);
-  const [launching, setLaunching] = useState(false);
-
-  const handleLaunch = () => {
-    setLaunching(true);
-    setProgress(0);
-    const interval = setInterval(() => {
-      setProgress((prev) => {
-        if (prev >= 100) {
-          clearInterval(interval);
-          setLaunching(false);
-          return 100;
-        }
-        return prev + 5;
-      });
-    }, 200);
-  };
-
   return (
     <div className="flex h-screen w-full items-center justify-center bg-gradient-to-br from-zinc-900 via-zinc-800 to-zinc-900 p-6">
       <Card className="w-[480px] shadow-2xl rounded-2xl border border-zinc-700 bg-zinc-900/80 backdrop-blur-md">
@@ -44,21 +25,12 @@ export default function App() {
             {/* Play Tab */}
             <TabsContent value="play" className="space-y-4">
               <div className="flex flex-col items-center gap-4">
-                {!launching ? (
-                  <Button
-                    onClick={handleLaunch}
-                    className="w-full font-bold text-lg flex items-center gap-2"
-                  >
-                    <Play className="w-5 h-5" /> LAUNCH
-                  </Button>
-                ) : (
-                  <div className="w-full space-y-2">
-                    <Progress value={progress} />
-                    <p className="text-sm text-zinc-400 text-center">
-                      Downloading assets... {progress}%
-                    </p>
-                  </div>
-                )}
+                <Button
+                  onClick={() => {
+                    invoke('authenticate')
+                  }}
+                  className="w-full font-bold text-lg flex items-center gap-2"
+                >Auth</Button>
               </div>
             </TabsContent>