rename web_server to api (#29)

* add front end code

* change licence

* rename web_server to API

* change name to web_server

api/db/__init__.py

@@ -0,0 +1,54 @@
+#
+#  Copyright 2019 The RAG Flow Authors. All Rights Reserved.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+#
+from enum import Enum
+from enum import IntEnum
+from strenum import StrEnum
+
+
+class StatusEnum(Enum):
+    VALID = "1"
+    IN_VALID = "0"
+
+
+class UserTenantRole(StrEnum):
+    OWNER = 'owner'
+    ADMIN = 'admin'
+    NORMAL = 'normal'
+
+
+class TenantPermission(StrEnum):
+    ME = 'me'
+    TEAM = 'team'
+
+
+class SerializedType(IntEnum):
+    PICKLE = 1
+    JSON = 2
+
+
+class FileType(StrEnum):
+    PDF = 'pdf'
+    DOC = 'doc'
+    VISUAL = 'visual'
+    AURAL = 'aural'
+    VIRTUAL = 'virtual'
+
+
+class LLMType(StrEnum):
+    CHAT = 'chat'
+    EMBEDDING = 'embedding'
+    SPEECH2TEXT = 'speech2text'
+    IMAGE2TEXT = 'image2text'