chore: explicit types

README.md

@@ -10,7 +10,7 @@ A simple password generator command line interface.
   - [x] Include numbers
 - [x] As a user I want the generated password to be copied to the clipboard
 - [x] As a user I want the generated password to be saved to a file
-- [ ] As a user I want to store generated passwords in a database for later usage
+- [x] As a user I want to store generated passwords in a database for later usage
   - [ ] Passwords must not be associated directly with the service they were generated for
   - [ ] I can verify if the password is associated to a given service
 

app/data/sqlite.py

@@ -1,8 +1,9 @@
 import sqlite3
+from typing import Any
 
 
 class DB:
-    def __init__(self, db_str="pg.db") -> None:
+    def __init__(self, db_str: str = "pg.db") -> None:
         self.connection = sqlite3.connect(db_str)
         self.cursor = self.connection.cursor()
         self.execute("CREATE TABLE IF NOT EXISTS passwords (password text)")
@@ -10,5 +11,5 @@ class DB:
     def commit(self) -> None:
         self.connection.commit()
 
-    def execute(self, query: str, *args) -> None:
+    def execute(self, query: str, *args: Any) -> None:
         self.cursor.execute(query, *args)

app/data/type.py

@@ -0,0 +1,9 @@
+from typing import Any, Protocol
+
+
+class DBConnector(Protocol):
+    def commit(self) -> None:
+        ...
+
+    def execute(self, query: str, *args: Any) -> None:
+        ...

app/main.py

@@ -3,10 +3,9 @@ from typing import Optional
 
 import typer
 
-import app.data.sqlite as sqlite
+import app.repositories.sqlite as sqlite
 import app.usecases.pass_gen as pass_gen
 import app.usecases.utils as utils
-from app.repositories.sqlite import PasswordRepository
 
 app = typer.Typer()
 
@@ -39,6 +38,7 @@ def main(
     ),
     random: bool = True,
 ) -> None:
+    sqlite_repo = sqlite.get_instance()
     seed = r.randint(0, 100) if random else 0
     options = pass_gen.PassGenOptions(
         seed=seed,
@@ -46,8 +46,7 @@ def main(
         symbols=symbols,
         numbers=numbers,
     )
-    db = sqlite.DB()
+
-    sqlite_repo = PasswordRepository(db)
     password = pass_gen.generate_password(sqlite_repo, options)
 
     typer.echo(typer.style(f"🔐 {password}", fg=typer.colors.GREEN, bold=True))

app/repositories/sqlite.py

@@ -1,13 +1,19 @@
-from typing import Any
+import app.data.sqlite as sqlite
+from app.data.type import DBConnector
 
 
 class PasswordRepository:
-    def __init__(self, db: Any) -> None:
+    def __init__(self, db: DBConnector) -> None:
         self.db = db
 
     def save(self, password: str) -> None:
         try:
-            self.db.execute(f"INSERT INTO passwords VALUES (:password)", {"password": password})
+            self.db.execute("INSERT INTO passwords VALUES (:password)", {"password": password})
             self.db.commit()
         except Exception as e:
             print(e)
+
+
+def get_instance() -> PasswordRepository:
+    db = sqlite.DB()
+    return PasswordRepository(db)