Initial Commit

utilities/database/database.py

@@ -0,0 +1,50 @@
+class Database():
+    def __init__(self):
+        pass
+
+    def query(self, query: str, parameters: list=None) -> tuple[int, list[dict]]:
+        pass
+
+    def select(self, table: str, columns: list[str]=None, where: list[dict]=None) -> list[dict]:
+        query_string = "SELECT {columns} FROM {table}{where}".format(
+            columns = "*" if columns is None else ",".join(columns),
+            table = table,
+            where = self.__generate_basic_where_clause(where) if not where is None else ""
+        )
+
+        return self.query(query_string, [element["value"] for element in where] if not where is None else None)[1]
+
+    def insert(self, table: str, columns: list[str], values: list) -> int:
+        query_string = "INSERT INTO {table} ({columns}) VALUES ({values})".format(
+            table = table,
+            columns = ",".join(columns),
+            values = ("?," * len(values))[:-1]
+        )
+
+        return self.query(query_string, values)[0]
+    
+    def update(self, table: str, columns: list[str], values: list, where: list[dict]=None) -> int:
+        query_string = "UPDATE {table} SET {set_rules}{where}".format(
+            table = table,
+            set_rules = ",".join([element + "=?" for element in columns]),
+            where = self.__generate_basic_where_clause(where) if not where is None else ""
+        )
+
+        return self.query(query_string, values)[0]
+    
+    def delete(self, table: str, where: list[dict]=None) -> int:
+        query_string = "DELETE FROM {table}{where}".format(
+            table = table,
+            where = self.__generate_basic_where_clause(where) if not where is None else ""
+        )
+
+        return self.query(query_string)[0]
+        
+    def __generate_basic_where_clause(self, where: list[dict]):
+        return " WHERE {clauses}".format(
+            clauses = "".join([
+                element["name"] + " " + element["compare"] + " ?" + (" " + element["boolean_op"] + " " if "boolean_op" in element else "")
+                for element in where
+            ])
+        )
+