Added first serverjar handling

src/serverjar/serverjar_updatechecker.py

@@ -0,0 +1,70 @@
+"""
+Checks the installed serverjar for updates
+"""
+
+import os
+from rich.console import Console
+
+from src.utils.console_output import rich_print_error
+from src.handlers.handle_config import config_value
+from src.handlers.handle_sftp import sftp_create_connection, sftp_list_files_in_server_root
+from src.handlers.handle_ftp import ftp_create_connection, ftp_list_files_in_server_root
+
+
+def get_installed_server_jar_file(config_values) -> str:
+    """
+    Gets the file name of the installed server jar
+
+    :param config_values: Configuration values from pluGET config
+
+    :returns: Full file name of installed server jar
+    """
+    match config_values.connection:
+        case "sftp":
+            connection = sftp_create_connection()
+            file_list_server_root = sftp_list_files_in_server_root(connection)
+        case "ftp":
+            connection = ftp_create_connection()
+            file_list_server_root = ftp_list_files_in_server_root(connection)
+        case _:
+            file_list_server_root = os.path.dirname(config_values.path_to_plugin_folder)
+            file_list_server_root = os.listdir(file_list_server_root)
+
+    file_server_jar_full_name = None
+    try:
+        for file in file_list_server_root:
+            try:
+                if ".jar" in file:
+                    file_server_jar_full_name = file
+                    break
+            except TypeError:
+                continue
+    except TypeError:
+        rich_print_error("Error: Serverjar couldn't be found")
+        return None
+    return file_server_jar_full_name
+
+
+def check_update_available_installed_server_jar() -> None:
+    """
+    Handles the checking of available updates of the installed server jar
+
+    :params: None
+    """
+    config_values = config_value()
+    rich_console = Console()
+    file_server_jar_full_name = get_installed_server_jar_file(config_values)
+    if file_server_jar_full_name == None:
+        # print error and exit function
+        rich_print_error("Error: Serverjar couldn't be found")
+        return None
+    
+    rich_console.print(f"[not bold][cyan]Checking: [bright_magenta]{file_server_jar_full_name}")
+
+    # TODO: Add other serverjars here
+    if "paper" in file_server_jar_full_name:
+        print("paper check update")
+        print(file_server_jar_full_name)
+
+    else:
+        rich_print_error(f"{file_server_jar_full_name} isn't supported")