Add missing poetry export plugin

Reviewed-on: #10

.drone.yml

@@ -5,12 +5,12 @@ steps:
   - name: publish container
     image: plugins/docker
     settings:
-      username:
-        from_secret: docker_reg_username
+      username: autono-bot
       password:
-        from_secret: docker_reg_passwd
-      repo: decentral1se/keycloak-collective-portal
+        from_secret: git_autonomic_zone_token_autono-bot
+      repo: git.autonomic.zone/autonomic-cooperative/keycloak-collective-portal
       auto_tag: true
+      registry: git.autonomic.zone
 trigger:
   branch:
     - main

.env.sample

@@ -0,0 +1,11 @@
+APP_SECRET_KEY=foobar
+APP_THEME=lumbung
+INVITE_TIME_LIMIT=30
+KEYCLOAK_CLIENT_ID=admin-cli
+KEYCLOAK_CLIENT_SECRET=barfoo
+KEYCLOAK_DOMAIN=login.lumbung.space
+KEYCLOAK_REALM=lumbung-space
+REDIS_DB=0
+REDIS_HOST=localhost
+REDIS_PORT=6379
+AUTOMATICALLY_LOG_IN=False

.gitignore

@@ -1,2 +1,3 @@
 *.pyc
+.env
 /__pycache__/

Dockerfile

@@ -1,9 +1,10 @@
-FROM python:3.9 as builder
+FROM python:3.9 AS builder
 
 COPY . /project
 WORKDIR /project
 
 RUN pip install poetry
+RUN poetry self add poetry-plugin-export
 RUN poetry export --without-hashes -o requirements.txt -f requirements.txt
 RUN poetry build --format=wheel
 RUN cp dist/* /tmp
@@ -15,5 +16,7 @@ RUN pip install --no-cache-dir --disable-pip-version-check --no-index --no-deps
 COPY . /srv/project
 WORKDIR /srv/project
 
-CMD ["uvicorn", "--host", "0.0.0.0", "keycloak_collective_portal:app"]
+RUN apt update && apt install -yq curl
+
+CMD ["uvicorn", "--forwarded-allow-ips='*'", "--proxy-headers", "--host", "0.0.0.0", "keycloak_collective_portal.main:app"]
 EXPOSE 8000

README.md

@@ -1,21 +1,40 @@
 # keycloak-collective-portal
 
+> **WARNING**: this software is in a pre-alpha quality state and is an initial
+> prototype. It is being developed within the context of
+> [lumbung.space](https://lumbung.space/) and may have hard-coded values and
+> configuration specifically for that environment. If the idea of this software
+> sounds interesting to you, please let us know on the issue tracker!
+
 [![Build Status](https://drone.autonomic.zone/api/badges/autonomic-cooperative/keycloak-collective-portal/status.svg?ref=refs/heads/main)](https://drone.autonomic.zone/autonomic-cooperative/keycloak-collective-portal)
 
 > Community Keycloak SSO user management
 
-This is a tiny Python app that allows you create custom web pages, outside of
-the Keycloak administration interface, which can be used to manage users in
+This is a small Python app that allows you to create custom web pages, outside
+of the Keycloak administration interface, which can be used to manage users in
 Keycloak. This is done via the REST API. It was designed with collective
 management in mind. Existing Keycloak users can authenticate with the app and
 then do things like invite others, send verification emails and so on. Anything
 that the REST API supports, this app can support. We aim to strive for the
-maximum usability which is often lacking in Enterprise Software ™ environments.
-This is the No Admins, No Masters edition of Keycloak.
+usability which is often lacking in Enterprise Software ™ environments
+(Keycloak is made within the context of RedHat / IBM). This is the No Admins,
+No Masters edition of Keycloak.
+
+## Feature set
+
+- **invite links** ([demo video](https://matrix.autonomic.zone/_matrix/media/r0/download/autonomic.zone/HRQwVkAwGdxIwaqFhUttbckB)):
+  - Any collective member with an existing Keycloak account can log in and generate them
+  - They are valid for 30 days by default (configurable via `INVITE_TIME_LIMIT`)
+  - Anyone with an invite link can create an account on the Keycloak, so don't share publicly!
+  - There is no access granularity on the account creation implemented yet, so the accounts are "global"
+    - **New**: it is possible to only allow "admins" to log in, see [feature flags](#feature-flags)
+  - Once the user fills in their name, email, password they will receive an email verification mail
+
+If you want a feature implemented, please open an issue to discuss.
 
 ## Getting Started
 
-### From a system adminstrator perspective
+### From a system administrator perspective
 
 A note on permissions: we use the `admin-cli` client and a fine grained, secure
 access configuration for making requests from this app to your Keycloak
@@ -25,14 +44,16 @@ your technology stack.
 
 - Ensure that your `admin-cli` client under your Client settings has the following config:
   - **Settings tab**:
-      - **Access Type**: `confidential`
-      - **Service Accounts Enabled**: `ON`
+      - **Client authentication**: `ON`
+      - **Service Accounts Roles**: `ON`
+      - **Authentication flow**: Make sure "Standard flow" is checked
+      - **Valid redirect URIs**: `https://{your keycloak-collective-portal domain}/auth/keycloak`
   - **Scope tab**:
       - **Full scope allowed**: `OFF`
-      - **Client roles**: Under `realm-management` add `manage-users` and `view-users`
   - **Service Account Roles tab**:
-      - **Client roles**: Under `realm-management` add `manage-users` and `view-users`
+      - Click "To manage detail and group mappings, click on the username service-account-admin-cli", then "Role mappings", "Assign role", then change the dropdown to "Filter by clients", and add `realm-management:manage-users`, `realm-management:view-users`, `account:manage-account` and `account:view-profile`
 - Deploy using [`coop-cloud/keycloak-colective-portal`](https://git.autonomic.zone/coop-cloud/keycloak-collective-portal)
+  - See the example [.env.sample](.env.sample) for the configuration available, more documentation will follow soon.
 
 ### From a collective member perspective
 
@@ -40,10 +61,45 @@ your technology stack.
 - Log in with your usual login details
 - Follow the instructions on the web page to perform administrative actions
 
+## Feature Flags
+
+### Only admins can log in
+
+#### Keycloak
+
+- Create a new group under `Groups` called `Administrators` (case sensistive!)
+- Create a new scope under `Client scopes`
+  - Name: `groups`
+  - Type: `Optional`
+  - Include in token scope: `yes`
+- Under the `Mappers` tab of this client scope, choose `Add mapper`
+  - Mapper type/Name: `Groups Membership`
+  - Token claim name: `groups`
+  - Add to ID token: `yes`
+  - Add to access token: `yes`
+  - Add to userinfo: `yes`
+- Add this client scope to your `admin-cli` client as `Optional`
+- Add a test user to this group under `Users`
+
+#### Keycloak Community Portal
+
+- Set `FEATURE_FLAG_ADMINS_ONLY=True` in your `.env`
+- You may want to customise `KEYCLOAK_GROUPS_KEY` / `KEYCLOAK_ADMINS_GROUP` if
+  you changed the value of `groups` / `Administrators` above
+
 ## Hacking
 
-It's a [FastAPI](https://fastapi.tiangolo.com/) application.
+It's a [FastAPI](https://fastapi.tiangolo.com/) application (if you know
+[Flask](https://flask.palletsprojects.com/en/2.0.x/) /
+[Sanic](https://sanic.readthedocs.io/en/stable/) then it is more or less the
+same thing). Currently being developed with Python 3.9. Once we move out of the
+prototype stage, more version compatability will be offered. You'll need a
+working Keycloak install as well to fill in correct `.env` values. A more
+covenient development environment will come along shortly too.
 
 ```
+$ docker run -p 6379:6379 -d redis:6-alpine
+$ cp .env.sample .env  # fill with real values
+$ set -a && source .env && set +a
 $ make
 ```

keycloak_collective_portal.py

@@ -1,27 +0,0 @@
-"""Community Keycloak SSO user management."""
-
-from fastapi import FastAPI, Request
-from fastapi.responses import HTMLResponse, RedirectResponse
-from fastapi.templating import Jinja2Templates
-from starlette.middleware.sessions import SessionMiddleware
-
-app = FastAPI()
-app.add_middleware(SessionMiddleware, secret_key="mysecretzkey")
-templates = Jinja2Templates(directory="templates")
-
-
-@app.get("/", response_class=HTMLResponse)
-async def home(request: Request):
-    user = request.session.get("user")
-    if user:
-        return templates.TemplateResponse(
-            "index.html", context={"request": request}
-        )
-    return RedirectResponse("/login")
-
-
-@app.get("/login", response_class=HTMLResponse)
-async def login(request: Request):
-    return templates.TemplateResponse(
-        "login.html", context={"request": request}
-    )

keycloak_collective_portal/config.py

@@ -0,0 +1,55 @@
+"""Application configuraiton."""
+
+import logging
+from os import environ
+from pathlib import Path
+
+# Application secret key, used for the SessionMiddleware
+APP_SECRET_KEY = environ.get("APP_SECRET_KEY")
+
+# Keycloak client details
+KEYCLOAK_CLIENT_ID = environ.get("KEYCLOAK_CLIENT_ID")
+KEYCLOAK_CLIENT_SECRET = environ.get("KEYCLOAK_CLIENT_SECRET")
+KEYCLOAK_DOMAIN = environ.get("KEYCLOAK_DOMAIN")
+KEYCLOAK_REALM = environ.get("KEYCLOAK_REALM")
+KEYCLOAK_SCOPES = environ.get("KEYCLOAK_SCOPES", "openid profile email groups")
+KEYCLOAK_GROUPS_KEY = environ.get("KEYCLOAK_GROUPS_KEY", "groups")
+KEYCLOAK_ADMINS_GROUP = environ.get("KEYCLOAK_ADMINS_GROUP", "Administrators")
+KEYCLOAK_BASE_URL = f"https://{KEYCLOAK_DOMAIN}/realms/{KEYCLOAK_REALM}/protocol/openid-connect"  # noqa
+
+# Redis connection details, our main storage
+REDIS_DB = environ.get("REDIS_DB")
+REDIS_HOST = environ.get("REDIS_HOST")
+REDIS_PORT = environ.get("REDIS_PORT")
+
+# How many days do we want the invites to be valid for?
+INVITE_TIME_LIMIT = int(environ.get("INVITE_TIME_LIMIT", 30))
+
+# Static and template configuration
+STATIC_DIR = Path(".").absolute() / "keycloak_collective_portal" / "static"
+TEMPLATE_DIR = Path(".").absolute() / "keycloak_collective_portal" / "templates"
+
+# Theme selection
+APP_THEME = environ.get("APP_THEME", "default")
+
+# Log level
+LOG_LEVEL = environ.get("APP_LOG_LEVEL", "info")
+if LOG_LEVEL == "info":
+    APP_LOG_LEVEL = logging.INFO
+elif LOG_LEVEL == "debug":
+    APP_LOG_LEVEL = logging.DEBUG
+else:
+    APP_LOG_LEVEL = logging.INFO
+
+
+def to_bool(env_var):
+    """Parse a bool from the environment."""
+    return environ.get(env_var, "False").lower() in ("true", "1", "t")
+
+
+# Automatically log folks in or show the default log in page?
+AUTOMATICALLY_LOG_IN = to_bool("AUTOMATICALLY_LOG_IN")
+
+# Feature flags
+# Only admins can log in to the interface
+FEATURE_FLAG_ADMINS_ONLY = to_bool("FEATURE_FLAG_ADMINS_ONLY")

keycloak_collective_portal/dependencies.py

@@ -0,0 +1,51 @@
+"""Route dependencies."""
+
+from datetime import datetime as dt
+from datetime import timedelta
+
+from fastapi import Depends, Request
+from humanize import naturaldelta
+
+
+async def fresh_token(request: Request):
+    """Ensure fresh credentials for speaking to Keycloak."""
+    from keycloak_collective_portal.keycloak import init_keycloak
+
+    request.app.state.keycloak = init_keycloak()
+
+
+async def logged_in(request: Request):
+    """Ensure the user is logged in."""
+    from keycloak_collective_portal.exceptions import RequiresLoginException
+
+    user = request.session.get("user")
+
+    if not user:
+        raise RequiresLoginException
+
+    return user
+
+
+async def get_user(request: Request):
+    """Retrieve the user object."""
+    return request.session.get("user")
+
+
+async def get_invites(request: Request, user=Depends(get_user)):
+    """Retrieve all invites from storage."""
+    from keycloak_collective_portal.config import INVITE_TIME_LIMIT
+
+    all_invites = {}
+
+    for username in await request.app.state.redis.keys("*"):
+        invites = await request.app.state.redis.get(username)
+
+        for invite in invites:
+            invite["validity"] = naturaldelta(
+                dt.fromisoformat(invite["time"])
+                + timedelta(days=INVITE_TIME_LIMIT)
+            )
+
+        all_invites[username] = invites
+
+    return all_invites

keycloak_collective_portal/exceptions.py

@@ -0,0 +1,7 @@
+"""Exceptions."""
+
+
+class RequiresLoginException(Exception):
+    """An exception thrown if the user is not logged in."""
+
+    pass

keycloak_collective_portal/keycloak.py

@@ -0,0 +1,21 @@
+"""Keycloak logic."""
+
+from keycloak import KeycloakAdmin
+
+
+def init_keycloak():
+    """Initialise Keycloak client."""
+    from keycloak_collective_portal.config import (
+        KEYCLOAK_CLIENT_SECRET,
+        KEYCLOAK_DOMAIN,
+        KEYCLOAK_REALM,
+    )
+
+    client = KeycloakAdmin(
+        server_url=f"https://{KEYCLOAK_DOMAIN}",
+        realm_name=KEYCLOAK_REALM,
+        client_secret_key=KEYCLOAK_CLIENT_SECRET,
+        verify=True,
+    )
+
+    return client

keycloak_collective_portal/main.py

@@ -0,0 +1,82 @@
+"""App entrypoint."""
+
+import logging
+
+from fastapi import FastAPI, Request
+from fastapi.responses import HTMLResponse, RedirectResponse
+from fastapi.staticfiles import StaticFiles
+from fastapi.templating import Jinja2Templates
+from starlette.exceptions import HTTPException
+from starlette.middleware.sessions import SessionMiddleware
+
+from keycloak_collective_portal.config import (
+    APP_LOG_LEVEL,
+    APP_SECRET_KEY,
+    APP_THEME,
+    REDIS_DB,
+    REDIS_HOST,
+    REDIS_PORT,
+    STATIC_DIR,
+    TEMPLATE_DIR,
+)
+from keycloak_collective_portal.exceptions import RequiresLoginException
+from keycloak_collective_portal.keycloak import init_keycloak
+from keycloak_collective_portal.oidc import init_oidc
+from keycloak_collective_portal.redis import Redis
+from keycloak_collective_portal.routes import (
+    health,
+    invite,
+    oidc,
+    register,
+    root,
+)
+
+log = logging.getLogger("uvicorn")
+log.setLevel(APP_LOG_LEVEL)
+
+app = FastAPI(docs_url=None, redoc_url=None)
+
+
+@app.exception_handler(RequiresLoginException)
+async def requires_login(request, exception):
+    return RedirectResponse(request.url_for("login"))
+
+
+@app.exception_handler(HTTPException)
+async def http_exception_handler(request, exc):
+    home = request.url_for("login")
+    return HTMLResponse(f"<p>{exc.detail} (<a href='{home}'>home</a>)</p>")
+
+
+@app.on_event("startup")
+async def startup_event():
+    redis = Redis()
+    app.state.redis = await redis.create_pool(
+        f"redis://{REDIS_HOST}:{REDIS_PORT}/{REDIS_DB}?encoding=utf-8"
+    )
+
+
+@app.on_event("shutdown")
+async def shutdown_event():
+    await app.state.redis.close()
+
+
+app.add_middleware(SessionMiddleware, secret_key=APP_SECRET_KEY)
+
+app.mount("/static", StaticFiles(directory=STATIC_DIR), name="static")
+
+app.state.oidc = init_oidc()
+log.info("Initialised OpenID Connect client (for Keycloak logins)")
+
+app.state.keycloak = init_keycloak()
+log.info("Initialised Keycloak admin client (for Keycloak REST API)")
+
+app.state.templates = Jinja2Templates(directory=TEMPLATE_DIR)
+app.state.theme = APP_THEME
+app.state.log = log
+
+app.include_router(invite.router)
+app.include_router(oidc.router)
+app.include_router(register.router)
+app.include_router(root.router)
+app.include_router(health.router)

keycloak_collective_portal/oidc.py

@@ -0,0 +1,25 @@
+"""OpenID Connect logic."""
+
+from authlib.integrations.starlette_client import OAuth, OAuthError
+
+
+def init_oidc():
+    """Initialise OIDC client."""
+    from keycloak_collective_portal.config import (
+        KEYCLOAK_BASE_URL,
+        KEYCLOAK_CLIENT_ID,
+        KEYCLOAK_CLIENT_SECRET,
+        KEYCLOAK_SCOPES,
+    )
+
+    oidc = OAuth()
+    oidc.register(
+        name="keycloak",
+        client_kwargs={"scope": KEYCLOAK_SCOPES},
+        client_id=KEYCLOAK_CLIENT_ID,
+        client_secret=KEYCLOAK_CLIENT_SECRET,
+        authorize_url=f"{KEYCLOAK_BASE_URL}/auth",
+        access_token_url=f"{KEYCLOAK_BASE_URL}/token",
+        jwks_uri=f"{KEYCLOAK_BASE_URL}/certs",
+    )
+    return oidc

keycloak_collective_portal/redis.py

@@ -0,0 +1,41 @@
+"""Redis cache."""
+
+import json
+
+from aioredis import create_redis_pool
+
+
+class Redis:
+    """Redis cache."""
+
+    def __init__(self):
+        """Initialise the object."""
+        self._redis = None
+
+    async def create_pool(self, conn):
+        """Initialise pool."""
+        self._redis = await create_redis_pool(conn)
+        return self
+
+    async def keys(self, pattern):
+        """Retrieve keys that match a pattern."""
+        return await self._redis.keys(pattern)
+
+    async def set(self, key, value, dumps=True):
+        """Set a key."""
+        if dumps:
+            return await self._redis.set(key, json.dumps(value))
+        return await self._redis.set(key, value)
+
+    async def get(self, key, loads=True):
+        """Get a specific key."""
+        if loads:
+            value = await self._redis.get(key)
+            if value:
+                return json.loads(value)
+        return await self._redis.get(key)
+
+    async def close(self):
+        """Close the connection."""
+        self.redis_cache.close()
+        await self.redis_cache.wait_closed()

keycloak_collective_portal/routes/health.py

@@ -0,0 +1,10 @@
+"""Healthcheck routes."""
+
+from fastapi import APIRouter, Request
+
+router = APIRouter()
+
+
+@router.get("/healthz")
+async def healthz(request: Request):
+    return {"detail": "ALL ENGINES FIRING"}

keycloak_collective_portal/routes/invite.py

@@ -0,0 +1,53 @@
+"""Routes for invite logic."""
+
+from datetime import datetime as dt
+from uuid import uuid4
+
+from fastapi import APIRouter, Depends, Request
+from fastapi.responses import RedirectResponse
+
+from keycloak_collective_portal.dependencies import (
+    get_invites,
+    get_user,
+    logged_in,
+)
+
+router = APIRouter()
+
+
+@router.get("/invite/keycloak/create", dependencies=[Depends(logged_in)])
+async def invite_keycloak_create(
+    request: Request, user=Depends(get_user), invites=Depends(get_invites)
+):
+    username = user["preferred_username"]
+
+    new_invite = {"link": str(uuid4()), "time": str(dt.now())}
+    request.app.state.log.info(f"Generated new invite: {new_invite}")
+
+    invites = await request.app.state.redis.get(username)
+    if invites:
+        invites.append(new_invite)
+    else:
+        invites = [new_invite]
+
+    await request.app.state.redis.set(username, invites)
+
+    return RedirectResponse(request.url_for("home"))
+
+
+@router.get("/invite/keycloak/delete", dependencies=[Depends(logged_in)])
+async def invite_keycloak_delete(
+    request: Request, user=Depends(get_user), invites=Depends(get_invites)
+):
+    username = user["preferred_username"]
+    invite_to_delete = request.query_params.get("invite")
+
+    invites = await request.app.state.redis.get(username)
+    request.app.state.log.info(f"Retrieved invites: {invites}")
+
+    purged = [i for i in invites if i["link"] != invite_to_delete]
+    request.app.state.log.info(f"Purged invites: {invites}")
+
+    await request.app.state.redis.set(user["preferred_username"], purged)
+
+    return RedirectResponse(request.url_for("home"))

keycloak_collective_portal/routes/oidc.py

@@ -0,0 +1,58 @@
+"""OpenID Connect routes."""
+
+import httpx
+from fastapi import APIRouter, Depends, Request
+from fastapi.responses import HTMLResponse, RedirectResponse
+
+from keycloak_collective_portal.dependencies import logged_in
+
+router = APIRouter()
+
+
+@router.get("/login")
+async def login(request: Request):
+    from keycloak_collective_portal.config import AUTOMATICALLY_LOG_IN
+
+    if AUTOMATICALLY_LOG_IN:
+        return RedirectResponse(request.url_for("login_keycloak"))
+
+    return request.app.state.templates.TemplateResponse(
+        "login.html", context={"request": request}
+    )
+
+
+@router.get("/login/keycloak")
+async def login_keycloak(request: Request):
+    redirect_uri = request.url_for("auth_keycloak")
+    return await request.app.state.oidc.keycloak.authorize_redirect(
+        request, redirect_uri
+    )
+
+
+@router.get("/auth/keycloak")
+async def auth_keycloak(request: Request):
+    try:
+        token = await request.app.state.oidc.keycloak.authorize_access_token(
+            request
+        )
+    except Exception as exc:
+        return HTMLResponse(f"<p>{exc} (<a href='/'>home</a>)</p>")
+
+    user = await request.app.state.oidc.keycloak.parse_id_token(request, token)
+    request.session["user"] = dict(user)
+
+    return RedirectResponse(request.url_for("home"))
+
+
+@router.get("/logout", dependencies=[Depends(logged_in)])
+async def logout(request: Request):
+    from keycloak_collective_portal.config import KEYCLOAK_BASE_URL
+
+    try:
+        httpx.get(f"{KEYCLOAK_BASE_URL}/logout")
+    except Exception as exc:
+        return HTMLResponse(f"<p>{exc} (<a href='/'>home</a>)</p>")
+
+    request.session.pop("user", None)
+
+    return RedirectResponse(request.url_for("login"))

keycloak_collective_portal/routes/register.py

@@ -0,0 +1,126 @@
+"""Registration routes."""
+
+import json
+from datetime import datetime as dt
+from datetime import timedelta
+
+from fastapi import APIRouter, Depends, Form, Request
+from pydantic import EmailStr, errors
+
+from keycloak_collective_portal.dependencies import fresh_token, get_invites
+
+router = APIRouter()
+
+
+@router.get("/register/{invite}")
+async def register_invite(
+    request: Request, invite: str, invites=Depends(get_invites)
+):
+    from keycloak_collective_portal.config import INVITE_TIME_LIMIT
+
+    matching, username, matching_invite = False, None, None
+    for username in invites:
+        for _invite in invites[username]:
+            if invite == _invite["link"]:
+                matching = True
+                username = username
+                matching_invite = _invite
+
+    if not matching:
+        message = "This invite does not exist, sorry."
+        context = {"request": request, "message": message}
+        return request.app.state.templates.TemplateResponse(
+            "invalid.html", context=context
+        )
+
+    expired = (
+        dt.fromisoformat(matching_invite["time"])
+        + timedelta(days=INVITE_TIME_LIMIT)
+    ).day > dt.now().day
+
+    if expired:
+        message = "This invite has expired, sorry."
+        context = {"request": request, "message": message}
+        return request.app.state.templates.TemplateResponse(
+            "invalid.html", context=context
+        )
+
+    context = {"request": request, "invited_by": username}
+    return request.app.state.templates.TemplateResponse(
+        "register.html", context=context
+    )
+
+
+@router.post("/form/keycloak/register", dependencies=[Depends(fresh_token)])
+def form_keycloak_register(
+    request: Request,
+    first_name: str = Form(...),
+    last_name: str = Form(...),
+    username: str = Form(...),
+    email: str = Form(...),
+    password: str = Form(...),
+    password_again: str = Form(...),
+    invited_by: str = Form(...),
+):
+    context = {
+        "request": request,
+        "invited_by": invited_by,
+        "first_name": first_name,
+        "last_name": last_name,
+        "username": username,
+        "email": email,
+    }
+
+    try:
+        EmailStr().validate(email)
+    except errors.EmailError:
+        context["exception"] = "email is not valid?"
+        return request.app.state.templates.TemplateResponse(
+            "register.html", context=context
+        )
+
+    if password != password_again:
+        context["exception"] = "passwords don't match?"
+        return request.app.state.templates.TemplateResponse(
+            "register.html", context=context
+        )
+
+    payload = {
+        "email": email,
+        "username": username,
+        "enabled": True,
+        "firstName": first_name,
+        "lastName": last_name,
+        "credentials": [
+            {
+                "value": password,
+                "type": "password",
+            }
+        ],
+        "realmRoles": [
+            "user_default",
+        ],
+        "attributes": {"invited_by": invited_by},
+    }
+
+    try:
+        user_id = request.app.state.keycloak.create_user(
+            payload, exist_ok=False
+        )
+        request.app.state.keycloak.send_verify_email(user_id=user_id)
+    except Exception as exception:
+        request.app.state.log.error(
+            f"Keycloak user registration failed, saw: {exception}"
+        )
+        message = json.loads(exception.error_message).get(
+            "errorMessage", "Unknown reason"
+        )
+        context = {"request": request, "exception": message}
+        return request.app.state.templates.TemplateResponse(
+            "submit.html", context=context
+        )
+
+    context = {"request": request, "email": email}
+    return request.app.state.templates.TemplateResponse(
+        "submit.html", context=context
+    )

keycloak_collective_portal/routes/root.py

@@ -0,0 +1,40 @@
+"""Home routes."""
+
+from fastapi import APIRouter, Depends, Request
+
+from keycloak_collective_portal.dependencies import (
+    get_invites,
+    get_user,
+    logged_in,
+)
+
+router = APIRouter()
+
+
+@router.get("/", dependencies=[Depends(logged_in)])
+async def home(
+    request: Request, user=Depends(get_user), invites=Depends(get_invites)
+):
+    from keycloak_collective_portal.config import (
+        FEATURE_FLAG_ADMINS_ONLY,
+        KEYCLOAK_ADMINS_GROUP,
+        KEYCLOAK_GROUPS_KEY,
+    )
+
+    context = {"request": request, "user": user, "invites": invites}
+
+    if FEATURE_FLAG_ADMINS_ONLY:
+        context["message"] = "only admins can access this service"
+        if KEYCLOAK_GROUPS_KEY not in user:
+            return request.app.state.templates.TemplateResponse(
+                "invalid.html", context=context
+            )
+
+        if KEYCLOAK_ADMINS_GROUP not in user[KEYCLOAK_GROUPS_KEY]:
+            return request.app.state.templates.TemplateResponse(
+                "invalid.html", context=context
+            )
+
+    return request.app.state.templates.TemplateResponse(
+        "admin.html", context=context
+    )

keycloak_collective_portal/static/default.css

@@ -0,0 +1,25 @@
+input {
+  display: block;
+  margin-top: 5px;
+  margin-bottom: 15px;
+}
+
+th, td {
+  padding: 15px;
+}
+
+table, th, td {
+  border: 1px solid black;
+}
+
+input {
+  border: 2px solid currentcolor;
+}
+
+input:invalid {
+  border: 2px dashed red;
+}
+
+input:invalid:focus {
+  background-image: linear-gradient(magenta, pink);
+}

keycloak_collective_portal/static/lumbung.css

@@ -0,0 +1,29 @@
+input {
+  display: block;
+  margin-top: 5px;
+  margin-bottom: 15px;
+}
+
+th, td {
+  padding: 15px;
+}
+
+table, th, td {
+  border: 1px solid black;
+}
+
+input {
+  border: 2px solid currentcolor;
+}
+
+input:invalid {
+  border: 2px dashed red;
+}
+
+input:invalid:focus {
+  background-image: linear-gradient(magenta, pink);
+}
+
+.error {
+  color: red;
+}

keycloak_collective_portal/templates/admin.html

@@ -0,0 +1,31 @@
+{% extends "base.html" %}
+{% block content %}
+  <p>
+    Hello, {{ user.preferred_username }} 👋
+    <small>(<a href="{{ url_for('logout') }}">logout</a>)</small>
+  </p>
+
+  {% if user.preferred_username in invites and invites[user.preferred_username]|length > 0 %}
+    <table>
+      <tr>
+        <th>Link</th>
+        <th>Validity</th>
+        <th>Actions</th>
+      </tr>
+      {% for invite in invites[user.preferred_username] %}
+        <tr>
+          <td>
+            <a class="invite" href="{{ url_for('register_invite', invite=invite.link) }}">
+              {{ url_for('register_invite', invite=invite.link) }}
+            </a>
+          </td>
+          <td> {{ invite.validity }} </td>
+          <td> <a href="{{ url_for('invite_keycloak_delete') }}?invite={{ invite.link }}">delete</a> </td>
+        </tr>
+      {% endfor %}
+      </table>
+    {% endif %}
+  <p>
+    <a href="{{ url_for('invite_keycloak_create') }}">Generate an invite link</a>
+  </p>
+{% endblock %}

keycloak_collective_portal/templates/base.html

@@ -0,0 +1,18 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    {% block head %}
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    {% if request.app.state.theme == "default" %}
+      <link href="{{ url_for('static', path='/default.css') }}" rel="stylesheet">
+    {% elif request.app.state.theme == "lumbung" %}
+      <link href="{{ url_for('static', path='/lumbung.css') }}" rel="stylesheet">
+    {% endif %}
+    <title>{% block title %}{% endblock %}</title>
+    {% endblock %}
+  </head>
+  <body>
+    <div id="content">{% block content %}{% endblock %}</div>
+  </body>
+</html>

keycloak_collective_portal/templates/invalid.html

@@ -0,0 +1,5 @@
+{% extends "base.html" %}
+{% block content %}
+  <p>Woops, something went wrong: {{ message }}</p>
+  <p>Please contact your system adminstrator if this is unexpected.</p>
+{% endblock %}

keycloak_collective_portal/templates/login.html

@@ -0,0 +1,6 @@
+{% extends "base.html" %}
+{% block content %}
+  <p>
+    <a href="{{ url_for('login_keycloak') }}">Login</a>
+  </p>
+{% endblock %}

keycloak_collective_portal/templates/register.html

@@ -0,0 +1,35 @@
+{% extends "base.html" %}
+{% block content %}
+  <p>
+    You've been invited by {{ invited_by }} 🎉
+  </p>
+
+  {% if exception %}
+  <p class="error">Oops, something went wrong: {{ exception }} 😬</p>
+  {% endif %}
+
+  <form method="post" action="{{ url_for('form_keycloak_register') }}">
+    <label for="first_name">First name:</label>
+    <input type="text" name="first_name" value="{{ first_name }}" minlength="3" />
+
+    <label for="last_name">Last name:</label>
+    <input type="text" name="last_name" value="{{ last_name }}" minlength="3"/>
+
+    <label for="username">Username:</label>
+    <input type="text" name="username" value="{{ username }}" minlength="3"/>
+
+    <label for="email">Email:</label>
+    <input type="text" name="email" value="{{ email }}" minlength="3"/>
+
+    <label for="password">Password:</label>
+    <input type="password" name="password" minlength="8"/>
+
+    <label for="password_again">Password (just to be sure):</label>
+    <input type="password" name="password_again" minlength="8"/>
+
+    <input type="hidden" name="invited_by" value="{{ invited_by }}"/>
+
+    <input type="submit" value="Register" />
+  </form>
+
+{% endblock %}

keycloak_collective_portal/templates/submit.html

@@ -0,0 +1,10 @@
+{% extends "base.html" %}
+{% block content %}
+  {% if email %}
+  <p>Thank you! You will receive a welcome mail to {{ email }} shortly.</p>
+  <p>Don't forget to check your Spam folder, in case the email ends up there.</p>
+  {% elif exception %}
+  <p>Woops, something went wrong: {{ exception }}.</p>
+  <p>Please contact your system adminstrator if this is unexpected.</p>
+  {% endif %}
+{% endblock %}

makefile

@@ -1,10 +1,13 @@
 .DEFAULT: run
-.PHONY: run
+.PHONY: run redis
 
 run:
 	@if [ ! -d ".venv" ]; then \
 		python3 -m venv .venv && \
 		.venv/bin/pip install -U pip setuptools wheel poetry && \
-		.venv/bin/poetry install --dev; \
+		.venv/bin/poetry install; \
 	fi
-	.venv/bin/poetry run uvicorn keycloak_collective_portal:app --reload
+	.venv/bin/poetry run uvicorn keycloak_collective_portal.main:app --reload
+
+redis:
+	@docker run -p 6379:6379 --name redis -d redis:6-alpine

poetry.lock

@@ -1,3 +1,40 @@
+[[package]]
+name = "aiofiles"
+version = "0.7.0"
+description = "File support for asyncio."
+category = "main"
+optional = false
+python-versions = ">=3.6,<4.0"
+
+[[package]]
+name = "aioredis"
+version = "1.3.1"
+description = "asyncio (PEP 3156) Redis support"
+category = "main"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+async-timeout = "*"
+hiredis = "*"
+
+[[package]]
+name = "anyio"
+version = "3.1.0"
+description = "High level compatibility layer for multiple asynchronous event loop implementations"
+category = "main"
+optional = false
+python-versions = ">=3.6.2"
+
+[package.dependencies]
+idna = ">=2.8"
+sniffio = ">=1.1"
+
+[package.extras]
+doc = ["sphinx-rtd-theme", "sphinx-autodoc-typehints (>=1.2.0)"]
+test = ["coverage[toml] (>=4.5)", "hypothesis (>=4.0)", "pytest (>=6.0)", "pytest-mock (>=3.6.1)", "trustme", "uvloop (<0.15)", "mock (>=4)", "uvloop (>=0.15)"]
+trio = ["trio (>=0.16)"]
+
 [[package]]
 name = "appdirs"
 version = "1.4.4"
@@ -17,6 +54,28 @@ python-versions = ">=3.6"
 [package.extras]
 tests = ["pytest", "pytest-asyncio", "mypy (>=0.800)"]
 
+[[package]]
+name = "async-timeout"
+version = "3.0.1"
+description = "Timeout context manager for asyncio programs"
+category = "main"
+optional = false
+python-versions = ">=3.5.3"
+
+[[package]]
+name = "authlib"
+version = "0.15.4"
+description = "The ultimate Python library in building OAuth and OpenID Connect servers."
+category = "main"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+cryptography = "*"
+
+[package.extras]
+client = ["requests"]
+
 [[package]]
 name = "black"
 version = "21.6b0"
@@ -39,6 +98,33 @@ d = ["aiohttp (>=3.6.0)", "aiohttp-cors (>=0.4.0)"]
 python2 = ["typed-ast (>=1.4.2)"]
 uvloop = ["uvloop (>=0.15.2)"]
 
+[[package]]
+name = "certifi"
+version = "2021.5.30"
+description = "Python package for providing Mozilla's CA Bundle."
+category = "main"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "cffi"
+version = "1.14.5"
+description = "Foreign Function Interface for Python calling C code."
+category = "main"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+pycparser = "*"
+
+[[package]]
+name = "chardet"
+version = "4.0.0"
+description = "Universal encoding detector for Python 2 and 3"
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+
 [[package]]
 name = "click"
 version = "8.0.1"
@@ -58,6 +144,67 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
+[[package]]
+name = "cryptography"
+version = "3.4.7"
+description = "cryptography is a package which provides cryptographic recipes and primitives to Python developers."
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+cffi = ">=1.12"
+
+[package.extras]
+docs = ["sphinx (>=1.6.5,!=1.8.0,!=3.1.0,!=3.1.1)", "sphinx-rtd-theme"]
+docstest = ["doc8", "pyenchant (>=1.6.11)", "twine (>=1.12.0)", "sphinxcontrib-spelling (>=4.0.1)"]
+pep8test = ["black", "flake8", "flake8-import-order", "pep8-naming"]
+sdist = ["setuptools-rust (>=0.11.4)"]
+ssh = ["bcrypt (>=3.1.5)"]
+test = ["pytest (>=6.0)", "pytest-cov", "pytest-subtests", "pytest-xdist", "pretend", "iso8601", "pytz", "hypothesis (>=1.11.4,!=3.79.2)"]
+
+[[package]]
+name = "dnspython"
+version = "2.1.0"
+description = "DNS toolkit"
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[package.extras]
+dnssec = ["cryptography (>=2.6)"]
+doh = ["requests", "requests-toolbelt"]
+idna = ["idna (>=2.1)"]
+curio = ["curio (>=1.2)", "sniffio (>=1.1)"]
+trio = ["trio (>=0.14.0)", "sniffio (>=1.1)"]
+
+[[package]]
+name = "ecdsa"
+version = "0.17.0"
+description = "ECDSA cryptographic signature library (pure python)"
+category = "main"
+optional = false
+python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
+
+[package.dependencies]
+six = ">=1.9.0"
+
+[package.extras]
+gmpy = ["gmpy"]
+gmpy2 = ["gmpy2"]
+
+[[package]]
+name = "email-validator"
+version = "1.1.3"
+description = "A robust email syntax and deliverability validation library for Python 2.x/3.x."
+category = "main"
+optional = false
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
+
+[package.dependencies]
+dnspython = ">=1.15.0"
+idna = ">=2.0.0"
+
 [[package]]
 name = "fastapi"
 version = "0.65.2"
@@ -97,6 +244,30 @@ category = "main"
 optional = false
 python-versions = ">=3.6"
 
+[[package]]
+name = "hiredis"
+version = "2.0.0"
+description = "Python wrapper for hiredis"
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[[package]]
+name = "httpcore"
+version = "0.13.4"
+description = "A minimal low-level HTTP client."
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+anyio = ">=3.0.0,<4.0.0"
+h11 = ">=0.11,<0.13"
+sniffio = ">=1.0.0,<2.0.0"
+
+[package.extras]
+http2 = ["h2 (>=3,<5)"]
+
 [[package]]
 name = "httptools"
 version = "0.2.0"
@@ -108,6 +279,43 @@ python-versions = "*"
 [package.extras]
 test = ["Cython (==0.29.22)"]
 
+[[package]]
+name = "httpx"
+version = "0.18.1"
+description = "The next generation HTTP client."
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+certifi = "*"
+httpcore = ">=0.13.0,<0.14.0"
+rfc3986 = {version = ">=1.3,<2", extras = ["idna2008"]}
+sniffio = "*"
+
+[package.extras]
+brotli = ["brotlicffi (>=1.0.0,<2.0.0)"]
+http2 = ["h2 (>=3.0.0,<4.0.0)"]
+
+[[package]]
+name = "humanize"
+version = "3.7.1"
+description = "Python humanize utilities"
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[package.extras]
+tests = ["freezegun", "pytest", "pytest-cov"]
+
+[[package]]
+name = "idna"
+version = "2.10"
+description = "Internationalized Domain Names in Applications (IDNA)"
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
 [[package]]
 name = "isort"
 version = "5.8.0"
@@ -192,6 +400,14 @@ category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
+[[package]]
+name = "pyasn1"
+version = "0.4.8"
+description = "ASN.1 types and codecs"
+category = "main"
+optional = false
+python-versions = "*"
+
 [[package]]
 name = "pycodestyle"
 version = "2.7.0"
@@ -200,6 +416,14 @@ category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
+[[package]]
+name = "pycparser"
+version = "2.20"
+description = "C parser in Python"
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
 [[package]]
 name = "pydantic"
 version = "1.8.2"
@@ -234,6 +458,47 @@ python-versions = "*"
 [package.extras]
 cli = ["click (>=5.0)"]
 
+[[package]]
+name = "python-jose"
+version = "3.3.0"
+description = "JOSE implementation in Python"
+category = "main"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+ecdsa = "!=0.15"
+pyasn1 = "*"
+rsa = "*"
+
+[package.extras]
+cryptography = ["cryptography (>=3.4.0)"]
+pycrypto = ["pycrypto (>=2.6.0,<2.7.0)", "pyasn1"]
+pycryptodome = ["pycryptodome (>=3.3.1,<4.0.0)", "pyasn1"]
+
+[[package]]
+name = "python-keycloak"
+version = "0.25.0"
+description = "python-keycloak is a Python package providing access to the Keycloak API."
+category = "main"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+python-jose = ">=1.4.0"
+requests = ">=2.20.0"
+
+[[package]]
+name = "python-multipart"
+version = "0.0.5"
+description = "A streaming multipart parser for Python"
+category = "main"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+six = ">=1.4.0"
+
 [[package]]
 name = "pyyaml"
 version = "5.4.1"
@@ -250,6 +515,65 @@ category = "dev"
 optional = false
 python-versions = "*"
 
+[[package]]
+name = "requests"
+version = "2.25.1"
+description = "Python HTTP for Humans."
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+
+[package.dependencies]
+certifi = ">=2017.4.17"
+chardet = ">=3.0.2,<5"
+idna = ">=2.5,<3"
+urllib3 = ">=1.21.1,<1.27"
+
+[package.extras]
+security = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)"]
+socks = ["PySocks (>=1.5.6,!=1.5.7)", "win-inet-pton"]
+
+[[package]]
+name = "rfc3986"
+version = "1.5.0"
+description = "Validating URI References per RFC 3986"
+category = "main"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+idna = {version = "*", optional = true, markers = "extra == \"idna2008\""}
+
+[package.extras]
+idna2008 = ["idna"]
+
+[[package]]
+name = "rsa"
+version = "4.7.2"
+description = "Pure-Python RSA implementation"
+category = "main"
+optional = false
+python-versions = ">=3.5, <4"
+
+[package.dependencies]
+pyasn1 = ">=0.1.3"
+
+[[package]]
+name = "six"
+version = "1.16.0"
+description = "Python 2 and 3 compatibility utilities"
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
+
+[[package]]
+name = "sniffio"
+version = "1.2.0"
+description = "Sniff out which async library your code is running under"
+category = "main"
+optional = false
+python-versions = ">=3.5"
+
 [[package]]
 name = "starlette"
 version = "0.14.2"
@@ -277,6 +601,19 @@ category = "main"
 optional = false
 python-versions = "*"
 
+[[package]]
+name = "urllib3"
+version = "1.26.5"
+description = "HTTP library with thread-safe connection pooling, file post, and more."
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
+
+[package.extras]
+brotli = ["brotlipy (>=0.6.0)"]
+secure = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "certifi", "ipaddress"]
+socks = ["PySocks (>=1.5.6,!=1.5.7,<2.0)"]
+
 [[package]]
 name = "uvicorn"
 version = "0.14.0"
@@ -332,9 +669,21 @@ python-versions = ">=3.6.1"
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.9"
-content-hash = "a3278c69c36a0390a247780ff0ad55c878d2e1ea028097bd46d8998d1c449ce1"
+content-hash = "ecf2a823da9679d30575e15c6fcb2eac6f1d9c323870831ba8c2f1fdc47e4fd1"
 
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@@ -505,6 +1025,16 @@ python-dotenv = [
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@@ -579,6 +1109,26 @@ regex = [
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@@ -592,6 +1142,10 @@ typing-extensions = [
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pyproject.toml

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 uvicorn = {extras = ["standard"], version = "^0.14.0"}
 Jinja2 = "^3.0.1"
 itsdangerous = "^2.0.1"
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+aioredis = "^1.3.1"
+humanize = "^3.7.1"
+python-multipart = "^0.0.5"
+python-keycloak = "^0.25.0"
+aiofiles = "^0.7.0"
+email-validator = "^1.1.3"
 
 [tool.poetry.dev-dependencies]
 black = "^21.6b0"

styles.css

@@ -1 +0,0 @@
-// TODO

templates/index.html

@@ -1,8 +0,0 @@
-<html>
-  <head>
-    <title>Home</title>
-  </head>
-  <body>
-    <p>Hello, World</p>
-  </body>
-</html>

templates/login.html

@@ -1,8 +0,0 @@
-<html>
-  <head>
-    <title>Login</title>
-  </head>
-  <body>
-    <p>Please login</p>
-  </body>
-</html>