Add ModInstaller class

src/leek/mod_installer.py

@@ -0,0 +1,74 @@
+from pathlib import Path
+from zipfile import Path as ZipPath
+from zipfile import ZipFile, is_zipfile
+
+
+class ModInstaller:
+    __archive_format: str
+
+    def __init__(self, mod_path: Path) -> None:
+        if is_zipfile(mod_path):
+            self.__archive_format = "zip"
+            archive: ZipFile = ZipFile(mod_path)
+            path: ZipPath = ZipPath(archive)
+
+            # Make sure archive contains a mod
+            things_in_root: list[ZipPath] = list(path.iterdir())
+            config_toml: ZipPath
+            match len(things_in_root):
+                case 0:
+                    raise EmptyArchiveError
+                case 1:
+                    config_toml = things_in_root[0] / "config.toml"
+                    if config_toml.exists() and config_toml.is_file():
+                        # Mod can be extracted as is
+                        return
+                case _:
+                    config_toml = path / "config.toml"
+                    if config_toml.exists() and config_toml.is_file():
+                        # Mod needs to be extracted in a folder
+                        return
+
+            # If we ever get here there's either no mod on the archive, or we failed to find it
+            raise NoModExceptionError(str(mod_path))
+
+        else:
+            raise UnsupportedArchiveTypeError(str(mod_path))
+
+    def install(self) -> None:
+        """
+        Install the mod to Project Diva's mod folder
+        """
+        raise NotImplementedError
+
+
+class UnsupportedArchiveTypeError(Exception):
+    """
+    Rased when ModInstaller runs into an archive that it can't extract
+    """
+
+    __message: str
+
+    def __init__(self, archive_path: str) -> None:
+        self.__message = f"Don't know how to unpack archive at {archive_path}"
+
+    def __str__(self) -> str:
+        return f"{self.__message}"
+
+
+class EmptyArchiveError(Exception):
+    pass
+
+
+class NoModExceptionError(Exception):
+    """
+    Raised if the archive does not have a mod inside
+    """
+
+    __message: str
+
+    def __init__(self, archive_path: str) -> None:
+        self.__message = f"Archive at {archive_path} does not have a mod"
+
+    def __str__(self) -> str:
+        return f"{self.__message}"