From 0e482d22fc79e80eef0511326d93b1e17d453de5 Mon Sep 17 00:00:00 2001
From: Frederick Yin <fkfd@fkfd.me>
Date: Wed, 27 Oct 2021 21:52:23 +0800
Subject: Users: csv table for users

---
 jimbrella/users.py | 74 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 jimbrella/users.py

diff --git a/jimbrella/users.py b/jimbrella/users.py
new file mode 100644
index 0000000..c68908f
--- /dev/null
+++ b/jimbrella/users.py
@@ -0,0 +1,74 @@
+import csv
+from .csv_table import CsvTable
+from .lockfile import Lockfile
+from .exceptions import UsernameTakenError
+
+
+class Users(CsvTable):
+    """A table of users, including admins.
+
+    A user must register through the interface provided by JImbrella to be one
+    of the users in this table. Those who borrow umbrellas via jForm are not
+    stored here.
+
+    The file format is csv. Each user takes one row.
+
+    Columns:
+    - username      | identifier Unicode string. must be unique.
+    - password      | salted and hashed password.
+    - role          | one of ("admin", "user"). expect additions.
+    - status        | one of ("normal", "denied"). expect additions.
+    - language      | one of ("en-US", 'zh-CN").
+    - realname      | (optional) legal name of user.
+    - id            | (optional) student/faculty ID.
+    - phone         | (optional) phone number.
+    - email         | (optional) email address.
+    """
+
+    def __init__(self, path):
+        self.path = path
+        self.lockfile = Lockfile(self.path)
+        super().__init__(
+            path,
+            [
+                {"name": col}
+                for col in [
+                    "username",
+                    "password",
+                    "role",
+                    "status",
+                    "language",
+                    "realname",
+                    "id",
+                    "phone",
+                    "email",
+                ]
+            ],
+        )
+
+    def read(self):
+        """Alias for `_read.`"""
+        return self._read()
+
+    def register(self, username, password, language):
+        """Create a new user.
+
+        If username is already taken, raise UsernameTakenError.
+        """
+        users = self._read()
+        usernames = [user["username"] for user in users]
+        if username in usernames:
+            raise UsernameTakenError(username)
+
+        user = {
+            "username": username,
+            "password": password,
+            "role": "user",
+            "status": "normal",
+            "language": language,
+            "realname": "",
+            "id": "",
+            "phone": "",
+            "email": "",
+        }
+        self._append(user)
-- 
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