Local API (#982)

* Introduce API scelleton

* Raw impl for session

* Simple state endpoint

* Apply _body naming

* Finalize session testing and comment out tons of useless code

* Clean and refactor part1

* Clean and refactor part2

* Clean and refactor part2

* Clean and refactor part2

* Clean and refactor part2

* Refactor middleware

* Refactor middleware

* Clean and refactor part3

* TDD and 2 beers

* TDD and 2 beers

* Complete state endpoints

* You can only set what is already present

* Use only JSON as response

* Use default logger

* Improve auth extraction

* Extend api command with more args

* Adjust API messages

tests/test_api_state.py

@@ -0,0 +1,80 @@
+from typing import Iterator
+
+import pytest
+from starlette.testclient import TestClient
+
+from facefusion import metadata, session_manager, state_manager
+from facefusion.apis.core import create_api
+
+
+@pytest.fixture(scope = 'module')
+def test_client() -> Iterator[TestClient]:
+	state_manager.init_item('execution_providers', [ 'cpu' ])
+
+	with TestClient(create_api()) as test_client:
+		yield test_client
+
+
+@pytest.fixture(scope = 'function', autouse = True)
+def before_each() -> None:
+	session_manager.SESSIONS.clear()
+
+
+def test_get_state(test_client : TestClient) -> None:
+	get_state_response = test_client.get('/state')
+
+	assert get_state_response.status_code == 401
+
+	create_session_response = test_client.post('/session', json =
+	{
+		'client_version': metadata.get('version')
+	})
+	create_session_body = create_session_response.json()
+
+	get_state_response = test_client.get('/state', headers =
+	{
+		'Authorization': 'Bearer ' + create_session_body.get('access_token')
+	})
+	get_state_body = get_state_response.json()
+
+	assert get_state_body.get('execution_providers') == [ 'cpu' ]
+	assert get_state_response.status_code == 200
+
+
+def test_set_state(test_client : TestClient) -> None:
+	set_state_response = test_client.put('/state', json =
+	{
+		'execution_providers': [ 'cuda' ]
+	})
+
+	assert set_state_response.status_code == 401
+
+	create_session_response = test_client.post('/session', json =
+	{
+		'client_version': metadata.get('version')
+	})
+	create_session_body = create_session_response.json()
+
+	set_state_response = test_client.put('/state', json =
+	{
+		'execution_providers': [ 'cuda' ]
+	}, headers =
+	{
+		'Authorization': 'Bearer ' + create_session_body.get('access_token')
+	})
+	set_state_body = set_state_response.json()
+
+	assert set_state_body.get('execution_providers') == [ 'cuda' ]
+	assert set_state_response.status_code == 200
+
+	set_state_response = test_client.put('/state', json =
+	{
+		'invalid': 'invalid'
+	}, headers =
+	{
+		'Authorization': 'Bearer ' + create_session_body.get('access_token')
+	})
+	set_state_body = set_state_response.json()
+
+	assert set_state_body.get('invalid') is None
+	assert set_state_response.status_code == 200