add database and schemas

src/logic/database.py

@@ -0,0 +1,38 @@
+import sqlite3
+import os
+from src import config
+from pathlib import Path
+from src.logic import USERS, MEDIA, LOANS
+class Database:
+    def __init__(self) -> None:
+        self.db_name = config.database.name
+        self.db_location = config.database.path
+        self.db_path = Path(self.db_location).joinpath(self.db_name)
+        print(self.db_path)
+        self.backup_path = config.database.backupLocation
+        try:
+            self.connection = sqlite3.connect(self.db_path)
+        except sqlite3.OperationalError as e:
+            print(e)
+            self.createDatabase()
+        pass
+    
+    def createDatabase(self):
+        print("Creating Database")
+        if not os.path.exists(self.db_location):
+            os.makedirs(self.db_location)
+        self.connection = sqlite3.connect(self.db_path)
+        self.cursor = self.connection.cursor()
+        self.cursor.execute(USERS)
+        self.cursor.execute(MEDIA)
+        self.cursor.execute(LOANS)
+        self.connection.commit()
+    def tableCheck(self):
+        pass
+        
+    def test(self):
+        print("Test")    
+    def checkUserExists(self, **kwargs):
+        pass
+
+    

src/logic/db_schemas.py

@@ -0,0 +1,25 @@
+USERS = """
+CREATE TABLE IF NOT EXISTS users (
+    id INTEGER PRIMARY KEY,
+    username TEXT NOT NULL,
+    usermain TEXT NOT NULL
+"""    #id == matrikelnr, 
+MEDIA = """
+CREATE TABLE IF NOT EXISTS media (
+    id AUTOINCREMENT PRIMARY KEY,
+    signature TEXT NOT NULL,
+    isbn TEXT NOT NULL,
+    ppn TEXT NOT NULL,
+    title TEXT NOT NULL,
+    """
+    
+LOANS = """
+CREATE TABLE IF NOT EXISTS loans (
+    id AUTOINCREMENT PRIMARY KEY,
+    user_id INTEGER NOT NULL,
+    media_id INTEGER NOT NULL,
+    loan_date TEXT NOT NULL,
+    return_date TEXT NOT NULL,
+    FOREIGN KEY (user_id) REFERENCES users(id),
+    FOREIGN KEY (media_id) REFERENCES media(id)
+"""