Merge branch 'main' into ks123/form-name-description

9 files changed, 342 insertions, 94 deletions

diff --git a/backend/constants.py b/backend/constants.py
index 3b8bec8..61519ed 100644
--- a/backend/constants.py
+++ b/backend/constants.py
@@ -18,6 +18,8 @@ OAUTH2_REDIRECT_URI = os.getenv(
 
 SECRET_KEY = os.getenv("SECRET_KEY", binascii.hexlify(os.urandom(30)).decode())
 
+HCAPTCHA_API_SECRET = os.getenv("HCAPTCHA_API_SECRET")
+
 QUESTION_TYPES = [
     "radio",
     "checkbox",
diff --git a/backend/models/__init__.py b/backend/models/__init__.py
index 80abf6f..98fa619 100644
--- a/backend/models/__init__.py
+++ b/backend/models/__init__.py
@@ -1,4 +1,7 @@
+from .antispam import AntiSpam
+from .discord_user import DiscordUser
 from .form import Form
+from .form_response import FormResponse
 from .question import Question
 
-__all__ = ["Form", "Question"]
+__all__ = ["AntiSpam", "DiscordUser", "Form", "FormResponse", "Question"]
diff --git a/backend/models/antispam.py b/backend/models/antispam.py
new file mode 100644
index 0000000..b16f686
--- /dev/null
+++ b/backend/models/antispam.py
@@ -0,0 +1,10 @@
+from pydantic import BaseModel
+
+
+class AntiSpam(BaseModel):
+    """Schema model for form response antispam field."""
+
+    ip_hash: str
+    user_agent_hash: str
+    captcha_pass: bool
+    dns_blacklisted: bool
diff --git a/backend/models/discord_user.py b/backend/models/discord_user.py
new file mode 100644
index 0000000..e835176
--- /dev/null
+++ b/backend/models/discord_user.py
@@ -0,0 +1,24 @@
+import typing as t
+
+from pydantic import BaseModel
+
+
+class DiscordUser(BaseModel):
+    """Schema model of Discord user for form response."""
+
+    # Discord default fields
+    id: int  # This is actually snowflake, but we simplify it here
+    username: str
+    discriminator: str
+    avatar: t.Optional[str]
+    bot: t.Optional[bool]
+    system: t.Optional[bool]
+    locale: t.Optional[str]
+    verified: t.Optional[bool]
+    email: t.Optional[str]
+    flags: t.Optional[int]
+    premium_type: t.Optional[int]
+    public_flags: t.Optional[int]
+
+    # Custom fields
+    admin: bool
diff --git a/backend/models/form_response.py b/backend/models/form_response.py
new file mode 100644
index 0000000..bea070f
--- /dev/null
+++ b/backend/models/form_response.py
@@ -0,0 +1,19 @@
+import typing as t
+
+from pydantic import BaseModel, Field
+
+from .antispam import AntiSpam
+from .discord_user import DiscordUser
+
+
+class FormResponse(BaseModel):
+    """Schema model for form response."""
+
+    id: str = Field(alias="_id")
+    user: t.Optional[DiscordUser]
+    antispam: t.Optional[AntiSpam]
+    response: t.Dict[str, t.Any]
+    form_id: str
+
+    class Config:
+        allow_population_by_field_name = True
diff --git a/backend/routes/forms/new.py b/backend/routes/forms/new.py
index ff39f12..6437a4a 100644
--- a/backend/routes/forms/new.py
+++ b/backend/routes/forms/new.py
@@ -26,5 +26,10 @@ class FormCreate(Route):
         except ValidationError as e:
             return JSONResponse(e.errors())
 
+        if await request.state.db.forms.find_one({"_id": form.id}):
+            return JSONResponse({
+                "error": "Form with same ID already exists."
+            }, status_code=400)
+
         await request.state.db.forms.insert_one(form.dict(by_alias=True))
         return JSONResponse(form.dict())
diff --git a/backend/routes/forms/submit.py b/backend/routes/forms/submit.py
index a94a1c9..3ecbda0 100644
--- a/backend/routes/forms/submit.py
+++ b/backend/routes/forms/submit.py
@@ -4,15 +4,24 @@ Submit a form.
 
 import binascii
 import hashlib
+import uuid
 
-import jwt
+import httpx
+import pydnsbl
+from pydantic import ValidationError
 from starlette.requests import Request
 
 from starlette.responses import JSONResponse
 
-from backend.constants import SECRET_KEY
+from backend.constants import HCAPTCHA_API_SECRET, FormFeatures
+from backend.models import Form, FormResponse
 from backend.route import Route
 
+HCAPTCHA_VERIFY_URL = "https://hcaptcha.com/siteverify"
+HCAPTCHA_HEADERS = {
+    "Content-Type": "application/x-www-form-urlencoded"
+}
+
 
 class SubmitForm(Route):
     """
@@ -28,40 +37,78 @@ class SubmitForm(Route):
         if form := await request.state.db.forms.find_one(
             {"_id": request.path_params["form_id"], "features": "OPEN"}
         ):
-            response_obj = {}
+            form = Form(**form)
+            response = data.copy()
+            response["id"] = str(uuid.uuid4())
+            response["form_id"] = form.id
 
-            if "DISABLE_ANTISPAM" not in form["features"]:
+            if FormFeatures.DISABLE_ANTISPAM.value not in form.features:
                 ip_hash_ctx = hashlib.md5()
                 ip_hash_ctx.update(request.client.host.encode())
                 ip_hash = binascii.hexlify(ip_hash_ctx.digest())
+                user_agent_hash_ctx = hashlib.md5()
+                user_agent_hash_ctx.update(request.headers["User-Agent"].encode())
+                user_agent_hash = binascii.hexlify(user_agent_hash_ctx.digest())
 
-                response_obj["antispam"] = {
-                    "ip": ip_hash.decode()
-                }
+                dsn_checker = pydnsbl.DNSBLIpChecker()
+                dsn_blacklist = await dsn_checker.check_async(request.client.host)
 
-            if "REQUIRES_LOGIN" in form["features"]:
-                if token := data.get("token"):
-                    data = jwt.decode(token, SECRET_KEY, algorithms=['HS256'])
-                    response_obj["user"] = {
-                        "user": f"{data['username']}#{data['discriminator']}",
-                        "id": data["id"]
+                async with httpx.AsyncClient() as client:
+                    query_params = {
+                        "secret": HCAPTCHA_API_SECRET,
+                        "response": data.get("captcha")
                     }
+                    r = await client.post(
+                        HCAPTCHA_VERIFY_URL,
+                        params=query_params,
+                        headers=HCAPTCHA_HEADERS
+                    )
+                    r.raise_for_status()
+                    captcha_data = r.json()
+
+                response["antispam"] = {
+                    "ip_hash": ip_hash.decode(),
+                    "user_agent_hash": user_agent_hash.decode(),
+                    "captcha_pass": captcha_data["success"],
+                    "dns_blacklisted": dsn_blacklist.blacklisted,
+                }
+
+            if FormFeatures.REQUIRES_LOGIN.value in form.features:
+                if request.user.is_authenticated:
+                    response["user"] = request.user.payload
 
-                    if "COLLECT_EMAIL" in form["features"]:
-                        if data.get("email"):
-                            response_obj["user"]["email"] = data["email"]
-                        else:
-                            return JSONResponse({
-                                "error": "User data did not include email information"
-                            })
+                    if FormFeatures.COLLECT_EMAIL.value in form.features and "email" not in response["user"]:  # noqa
+                        return JSONResponse({
+                            "error": "email_required"
+                        }, status_code=400)
                 else:
                     return JSONResponse({
-                        "error": "Missing Discord user data"
-                    })
+                        "error": "missing_discord_data"
+                    }, status_code=400)
+
+            missing_fields = []
+            for question in form.questions:
+                if question.id not in response["response"]:
+                    missing_fields.append(question.id)
+
+            if missing_fields:
+                return JSONResponse({
+                    "error": "missing_fields",
+                    "fields": missing_fields
+                }, status_code=400)
+
+            try:
+                response_obj = FormResponse(**response)
+            except ValidationError as e:
+                return JSONResponse(e.errors())
+
+            await request.state.db.responses.insert_one(
+                response_obj.dict(by_alias=True)
+            )
 
             return JSONResponse({
-                "form": form,
-                "response": response_obj
+                "form": form.dict(),
+                "response": response_obj.dict()
             })
         else:
             return JSONResponse({
diff --git a/poetry.lock b/poetry.lock
index eedc63e..d3ee7b5 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,12 +1,34 @@
 [[package]]
+name = "aiodns"
+version = "2.0.0"
+description = "Simple DNS resolver for asyncio"
+category = "main"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+pycares = ">=3.0.0"
+
+[[package]]
 name = "certifi"
-version = "2020.11.8"
+version = "2020.12.5"
 description = "Python package for providing Mozilla's CA Bundle."
 category = "main"
 optional = false
 python-versions = "*"
 
 [[package]]
+name = "cffi"
+version = "1.14.4"
+description = "Foreign Function Interface for Python calling C code."
+category = "main"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+pycparser = "*"
+
+[[package]]
 name = "click"
 version = "7.1.2"
 description = "Composable command line interface toolkit"
@@ -148,6 +170,20 @@ optional = false
 python-versions = "*"
 
 [[package]]
+name = "pycares"
+version = "3.1.1"
+description = "Python interface for c-ares"
+category = "main"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+cffi = ">=1.5.0"
+
+[package.extras]
+idna = ["idna (>=2.1)"]
+
+[[package]]
 name = "pycodestyle"
 version = "2.6.0"
 description = "Python style guide checker"
@@ -156,6 +192,14 @@ 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 = "1.7.3"
 description = "Data validation and settings management using python 3.6 type hinting"
@@ -169,6 +213,18 @@ typing_extensions = ["typing-extensions (>=3.7.2)"]
 email = ["email-validator (>=1.0.3)"]
 
 [[package]]
+name = "pydnsbl"
+version = "1.1.2"
+description = "Async dnsbl lists checker based on asyncio/aiodns."
+category = "main"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+idna = ">=2.9,<3"
+aiodns = ">=1.1.1,<=2.0"
+
+[[package]]
 name = "pyflakes"
 version = "2.2.0"
 description = "passive checker of Python programs"
@@ -191,7 +247,7 @@ flake8 = ["flake8", "flake8-import-order", "pep8-naming"]
 
 [[package]]
 name = "pymongo"
-version = "3.11.1"
+version = "3.11.2"
 description = "Python driver for MongoDB <http://www.mongodb.org>"
 category = "main"
 optional = false
@@ -308,12 +364,54 @@ python-versions = ">=3.6.1"
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.9"
-content-hash = "1ed93e3cb2d260977a8ad6a59d71f92e22776cb05bfbc37ed95968ca44e3dc57"
+content-hash = "9b3e9077c7cfab780a3333a213bbfee2eaa406da1f165a7a66cf1a83ac23011b"
 
 [metadata.files]
+aiodns = [
+    {file = "aiodns-2.0.0-py2.py3-none-any.whl", hash = "sha256:aaa5ac584f40fe778013df0aa6544bf157799bd3f608364b451840ed2c8688de"},
+    {file = "aiodns-2.0.0.tar.gz", hash = "sha256:815fdef4607474295d68da46978a54481dd1e7be153c7d60f9e72773cd38d77d"},
+]
 certifi = [
-    {file = "certifi-2020.11.8-py2.py3-none-any.whl", hash = "sha256:1f422849db327d534e3d0c5f02a263458c3955ec0aae4ff09b95f195c59f4edd"},
-    {file = "certifi-2020.11.8.tar.gz", hash = "sha256:f05def092c44fbf25834a51509ef6e631dc19765ab8a57b4e7ab85531f0a9cf4"},
+    {file = "certifi-2020.12.5-py2.py3-none-any.whl", hash = "sha256:719a74fb9e33b9bd44cc7f3a8d94bc35e4049deebe19ba7d8e108280cfd59830"},
+    {file = "certifi-2020.12.5.tar.gz", hash = "sha256:1a4995114262bffbc2413b159f2a1a480c969de6e6eb13ee966d470af86af59c"},
+]
+cffi = [
+    {file = "cffi-1.14.4-cp27-cp27m-macosx_10_9_x86_64.whl", hash = "sha256:ebb253464a5d0482b191274f1c8bf00e33f7e0b9c66405fbffc61ed2c839c775"},
+    {file = "cffi-1.14.4-cp27-cp27m-manylinux1_i686.whl", hash = "sha256:2c24d61263f511551f740d1a065eb0212db1dbbbbd241db758f5244281590c06"},
+    {file = "cffi-1.14.4-cp27-cp27m-manylinux1_x86_64.whl", hash = "sha256:9f7a31251289b2ab6d4012f6e83e58bc3b96bd151f5b5262467f4bb6b34a7c26"},
+    {file = "cffi-1.14.4-cp27-cp27m-win32.whl", hash = "sha256:5cf4be6c304ad0b6602f5c4e90e2f59b47653ac1ed9c662ed379fe48a8f26b0c"},
+    {file = "cffi-1.14.4-cp27-cp27m-win_amd64.whl", hash = "sha256:f60567825f791c6f8a592f3c6e3bd93dd2934e3f9dac189308426bd76b00ef3b"},
+    {file = "cffi-1.14.4-cp27-cp27mu-manylinux1_i686.whl", hash = "sha256:c6332685306b6417a91b1ff9fae889b3ba65c2292d64bd9245c093b1b284809d"},
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+    {file = "cffi-1.14.4-cp39-cp39-macosx_10_9_x86_64.whl", hash = "sha256:840793c68105fe031f34d6a086eaea153a0cd5c491cde82a74b420edd0a2b909"},
+    {file = "cffi-1.14.4-cp39-cp39-manylinux1_i686.whl", hash = "sha256:b18e0a9ef57d2b41f5c68beefa32317d286c3d6ac0484efd10d6e07491bb95dd"},
+    {file = "cffi-1.14.4-cp39-cp39-manylinux1_x86_64.whl", hash = "sha256:045d792900a75e8b1e1b0ab6787dd733a8190ffcf80e8c8ceb2fb10a29ff238a"},
+    {file = "cffi-1.14.4-cp39-cp39-win32.whl", hash = "sha256:ba4e9e0ae13fc41c6b23299545e5ef73055213e466bd107953e4a013a5ddd7e3"},
+    {file = "cffi-1.14.4-cp39-cp39-win_amd64.whl", hash = "sha256:f032b34669220030f905152045dfa27741ce1a6db3324a5bc0b96b6c7420c87b"},
+    {file = "cffi-1.14.4.tar.gz", hash = "sha256:1a465cbe98a7fd391d47dce4b8f7e5b921e6cd805ef421d04f5f66ba8f06086c"},
 ]
 click = [
     {file = "click-7.1.2-py2.py3-none-any.whl", hash = "sha256:dacca89f4bfadd5de3d7489b7c8a566eee0d3676333fbb50030263894c38c0dc"},
@@ -376,10 +474,45 @@ motor = [
 nested-dict = [
     {file = "nested_dict-1.61.tar.gz", hash = "sha256:de0fb5bac82ba7bcc23736f09373f18628ea57f92bbaa13480d23f261c41e771"},
 ]
+pycares = [
+    {file = "pycares-3.1.1-cp35-cp35m-macosx_10_6_intel.whl", hash = "sha256:81edb016d9e43dde7473bc3999c29cdfee3a6b67308fed1ea21049f458e83ae0"},
+    {file = "pycares-3.1.1-cp35-cp35m-manylinux1_i686.whl", hash = "sha256:1917b82494907a4a342db420bc4dd5bac355a5fa3984c35ba9bf51422b020b48"},
+    {file = "pycares-3.1.1-cp35-cp35m-manylinux1_x86_64.whl", hash = "sha256:a5089fd660f0b0d228b14cdaa110d0d311edfa5a63f800618dbf1321dcaef66b"},
+    {file = "pycares-3.1.1-cp35-cp35m-manylinux2010_i686.whl", hash = "sha256:48a7750f04e69e1f304f4332b755728067e7c4b1abe2760bba1cacd9ff7a847a"},
+    {file = "pycares-3.1.1-cp35-cp35m-manylinux2010_x86_64.whl", hash = "sha256:d88a279cbc5af613f73e86e19b3f63850f7a2e2736e249c51995dedcc830b1bb"},
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 python-dotenv = [
     {file = "python-dotenv-0.14.0.tar.gz", hash = "sha256:8c10c99a1b25d9a68058a1ad6f90381a62ba68230ca93966882a4dbc3bc9c33d"},
diff --git a/pyproject.toml b/pyproject.toml
index da2880f..41e5165 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,6 +16,7 @@ pyjwt = "^1.7.1"
 httpx = "^0.16.1"
 gunicorn = "^20.0.4"
 pydantic = "^1.7.2"
+pydnsbl = "^1.1"
 
 [tool.poetry.dev-dependencies]
 flake8 = "^3.8.4"