Moved utils into src directory, moved most of the functions from it into separate files

src/account_parsing.py

@@ -0,0 +1,37 @@
+import io
+from typing import Iterator, Self, Type
+
+import pydantic
+
+
+class _Account(pydantic.BaseModel):
+    name: str
+    login: str
+    passwd: str
+
+    @classmethod
+    def from_tuple(cls: Type[Self], tuple_: tuple[str, str, str]) -> Self:
+        return cls(name=tuple_[0], login=tuple_[1], passwd=tuple_[2])
+
+    def as_tuple(self: Self) -> tuple[str, str, str]:
+        return (self.name, self.login, self.passwd)
+
+
+class _Accounts(pydantic.BaseModel):
+    accounts: list[_Account] = pydantic.Field(default_factory=list)
+
+
+def _accounts_list_to_json(accounts: Iterator[tuple[str, str, str]]) -> str:
+    accounts = _Accounts(accounts=[_Account.from_tuple(i) for i in accounts])
+    return accounts.json()
+
+
+def json_to_accounts(json_: str) -> list[tuple[str, str, str]]:
+    accounts = _Accounts.parse_raw(json_)
+    return [i.as_tuple() for i in accounts.accounts]
+
+
+def accounts_to_json(accounts: Iterator[tuple[str, str, str]]) -> io.StringIO:
+    file = io.StringIO(_accounts_list_to_json(accounts))
+    file.name = "passwords.json"
+    return file