prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  Cascading Hints
  Hints should have a sense of unlocking where one hint cannot be used until a previous one or others are used.
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `CTFd/api/v1/hints.py`
  Content:
  ```
  1 from typing import List
  2 
  3 from flask import request
  4 from flask_restx import Namespace, Resource
  5 
  6 from CTFd.api.v1.helpers.request import validate_args
  7 from CTFd.api.v1.helpers.schemas import sqlalchemy_to_pydantic
  8 from CTFd.api.v1.schemas import APIDetailedSuccessResponse, APIListSuccessResponse
  9 from CTFd.constants import RawEnum
  10 from CTFd.models import Hints, HintUnlocks, db
  11 from CTFd.schemas.hints import HintSchema
  12 from CTFd.utils.decorators import admins_only, authed_only, during_ctf_time_only
  13 from CTFd.utils.helpers.models import build_model_filters
  14 from CTFd.utils.user import get_current_user, is_admin
  15 
  16 hints_namespace = Namespace("hints", description="Endpoint to retrieve Hints")
  17 
  18 HintModel = sqlalchemy_to_pydantic(Hints)
  19 
  20 
  21 class HintDetailedSuccessResponse(APIDetailedSuccessResponse):
  22     data: HintModel
  23 
  24 
  25 class HintListSuccessResponse(APIListSuccessResponse):
  26     data: List[HintModel]
  27 
  28 
  29 hints_namespace.schema_model(
  30     "HintDetailedSuccessResponse", HintDetailedSuccessResponse.apidoc()
  31 )
  32 
  33 hints_namespace.schema_model(
  34     "HintListSuccessResponse", HintListSuccessResponse.apidoc()
  35 )
  36 
  37 
  38 @hints_namespace.route("")
  39 class HintList(Resource):
  40     @admins_only
  41     @hints_namespace.doc(
  42         description="Endpoint to list Hint objects in bulk",
  43         responses={
  44             200: ("Success", "HintListSuccessResponse"),
  45             400: (
  46                 "An error occured processing the provided or stored data",
  47                 "APISimpleErrorResponse",
  48             ),
  49         },
  50     )
  51     @validate_args(
  52         {
  53             "type": (str, None),
  54             "challenge_id": (int, None),
  55             "content": (str, None),
  56             "cost": (int, None),
  57             "q": (str, None),
  58             "field": (
  59                 RawEnum("HintFields", {"type": "type", "content": "content"}),
  60                 None,
  61             ),
  62         },
  63         location="query",
  64     )
  65     def get(self, query_args):
  66         q = query_args.pop("q", None)
  67         field = str(query_args.pop("field", None))
  68         filters = build_model_filters(model=Hints, query=q, field=field)
  69 
  70         hints = Hints.query.filter_by(**query_args).filter(*filters).all()
  71         response = HintSchema(many=True, view="locked").dump(hints)
  72 
  73         if response.errors:
  74             return {"success": False, "errors": response.errors}, 400
  75 
  76         return {"success": True, "data": response.data}
  77 
  78     @admins_only
  79     @hints_namespace.doc(
  80         description="Endpoint to create a Hint object",
  81         responses={
  82             200: ("Success", "HintDetailedSuccessResponse"),
  83             400: (
  84                 "An error occured processing the provided or stored data",
  85                 "APISimpleErrorResponse",
  86             ),
  87         },
  88     )
  89     def post(self):
  90         req = request.get_json()
  91         schema = HintSchema(view="admin")
  92         response = schema.load(req, session=db.session)
  93 
  94         if response.errors:
  95             return {"success": False, "errors": response.errors}, 400
  96 
  97         db.session.add(response.data)
  98         db.session.commit()
  99 
  100         response = schema.dump(response.data)
  101 
  102         return {"success": True, "data": response.data}
  103 
  104 
  105 @hints_namespace.route("/<hint_id>")
  106 class Hint(Resource):
  107     @during_ctf_time_only
  108     @authed_only
  109     @hints_namespace.doc(
  110         description="Endpoint to get a specific Hint object",
  111         responses={
  112             200: ("Success", "HintDetailedSuccessResponse"),
  113             400: (
  114                 "An error occured processing the provided or stored data",
  115                 "APISimpleErrorResponse",
  116             ),
  117         },
  118     )
  119     def get(self, hint_id):
  120         user = get_current_user()
  121         hint = Hints.query.filter_by(id=hint_id).first_or_404()
  122 
  123         view = "unlocked"
  124         if hint.cost:
  125             view = "locked"
  126             unlocked = HintUnlocks.query.filter_by(
  127                 account_id=user.account_id, target=hint.id
  128             ).first()
  129             if unlocked:
  130                 view = "unlocked"
  131 
  132         if is_admin():
  133             if request.args.get("preview", False):
  134                 view = "admin"
  135 
  136         response = HintSchema(view=view).dump(hint)
  137 
  138         if response.errors:
  139             return {"success": False, "errors": response.errors}, 400
  140 
  141         return {"success": True, "data": response.data}
  142 
  143     @admins_only
  144     @hints_namespace.doc(
  145         description="Endpoint to edit a specific Hint object",
  146         responses={
  147             200: ("Success", "HintDetailedSuccessResponse"),
  148             400: (
  149                 "An error occured processing the provided or stored data",
  150                 "APISimpleErrorResponse",
  151             ),
  152         },
  153     )
  154     def patch(self, hint_id):
  155         hint = Hints.query.filter_by(id=hint_id).first_or_404()
  156         req = request.get_json()
  157 
  158         schema = HintSchema(view="admin")
  159         response = schema.load(req, instance=hint, partial=True, session=db.session)
  160 
  161         if response.errors:
  162             return {"success": False, "errors": response.errors}, 400
  163 
  164         db.session.add(response.data)
  165         db.session.commit()
  166 
  167         response = schema.dump(response.data)
  168 
  169         return {"success": True, "data": response.data}
  170 
  171     @admins_only
  172     @hints_namespace.doc(
  173         description="Endpoint to delete a specific Tag object",
  174         responses={200: ("Success", "APISimpleSuccessResponse")},
  175     )
  176     def delete(self, hint_id):
  177         hint = Hints.query.filter_by(id=hint_id).first_or_404()
  178         db.session.delete(hint)
  179         db.session.commit()
  180         db.session.close()
  181 
  182         return {"success": True}
  183
  ```
  --- END FILES ---
  
  Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.
  
  Here is an example:
  
  ```diff
  diff --git a/examples/server_async.py b/examples/server_async.py
  --- a/examples/server_async.py
  +++ b/examples/server_async.py
  @@ -313,4 +313,4 @@
   
   
   if __name__ == "__main__":
  -    asyncio.run(run_async_server("."), debug=True)
  +    asyncio.run(run_async_server(), debug=True)
  diff --git a/examples/server_sync.py b/examples/server_sync.py
  --- a/examples/server_sync.py
  +++ b/examples/server_sync.py
  @@ -313,5 +313,5 @@
   
   
   if __name__ == "__main__":
  -    server = run_sync_server(".")
  +    server = run_sync_server()
       server.shutdown()
  
  ```
  
golden_diff: diff --git a/CTFd/api/v1/hints.py b/CTFd/api/v1/hints.py
  --- a/CTFd/api/v1/hints.py
  +++ b/CTFd/api/v1/hints.py
  @@ -120,6 +120,33 @@
           user = get_current_user()
           hint = Hints.query.filter_by(id=hint_id).first_or_404()
   
  +        if hint.requirements:
  +            requirements = hint.requirements.get("prerequisites", [])
  +
  +            # Get the IDs of all hints that the user has unlocked
  +            all_unlocks = HintUnlocks.query.filter_by(account_id=user.account_id).all()
  +            unlock_ids = {unlock.id for unlock in all_unlocks}
  +
  +            # Filter out hint IDs that don't exist
  +            all_hint_ids = {h.id for h in Hints.query.with_entities(Hints.id).all()}
  +            prereqs = set(requirements).intersection(all_hint_ids)
  +
  +            # If the user has the necessary unlocks or is admin we should allow them to view
  +            if unlock_ids >= prereqs or is_admin():
  +                pass
  +            else:
  +                return (
  +                    {
  +                        "success": False,
  +                        "errors": {
  +                            "requirements": [
  +                                "You must unlock other hints before accessing this hint"
  +                            ]
  +                        },
  +                    },
  +                    403,
  +                )
  +
           view = "unlocked"
           if hint.cost:
               view = "locked"
  
verification_info: {"golden_diff": "diff --git a/CTFd/api/v1/hints.py b/CTFd/api/v1/hints.py\n--- a/CTFd/api/v1/hints.py\n+++ b/CTFd/api/v1/hints.py\n@@ -120,6 +120,33 @@\n         user = get_current_user()\n         hint = Hints.query.filter_by(id=hint_id).first_or_404()\n \n+        if hint.requirements:\n+            requirements = hint.requirements.get(\"prerequisites\", [])\n+\n+            # Get the IDs of all hints that the user has unlocked\n+            all_unlocks = HintUnlocks.query.filter_by(account_id=user.account_id).all()\n+            unlock_ids = {unlock.id for unlock in all_unlocks}\n+\n+            # Filter out hint IDs that don't exist\n+            all_hint_ids = {h.id for h in Hints.query.with_entities(Hints.id).all()}\n+            prereqs = set(requirements).intersection(all_hint_ids)\n+\n+            # If the user has the necessary unlocks or is admin we should allow them to view\n+            if unlock_ids >= prereqs or is_admin():\n+                pass\n+            else:\n+                return (\n+                    {\n+                        \"success\": False,\n+                        \"errors\": {\n+                            \"requirements\": [\n+                                \"You must unlock other hints before accessing this hint\"\n+                            ]\n+                        },\n+                    },\n+                    403,\n+                )\n+\n         view = \"unlocked\"\n         if hint.cost:\n             view = \"locked\"\n", "issue": "Cascading Hints\nHints should have a sense of unlocking where one hint cannot be used until a previous one or others are used.\n", "before_files": [{"content": "from typing import List\n\nfrom flask import request\nfrom flask_restx import Namespace, Resource\n\nfrom CTFd.api.v1.helpers.request import validate_args\nfrom CTFd.api.v1.helpers.schemas import sqlalchemy_to_pydantic\nfrom CTFd.api.v1.schemas import APIDetailedSuccessResponse, APIListSuccessResponse\nfrom CTFd.constants import RawEnum\nfrom CTFd.models import Hints, HintUnlocks, db\nfrom CTFd.schemas.hints import HintSchema\nfrom CTFd.utils.decorators import admins_only, authed_only, during_ctf_time_only\nfrom CTFd.utils.helpers.models import build_model_filters\nfrom CTFd.utils.user import get_current_user, is_admin\n\nhints_namespace = Namespace(\"hints\", description=\"Endpoint to retrieve Hints\")\n\nHintModel = sqlalchemy_to_pydantic(Hints)\n\n\nclass HintDetailedSuccessResponse(APIDetailedSuccessResponse):\n    data: HintModel\n\n\nclass HintListSuccessResponse(APIListSuccessResponse):\n    data: List[HintModel]\n\n\nhints_namespace.schema_model(\n    \"HintDetailedSuccessResponse\", HintDetailedSuccessResponse.apidoc()\n)\n\nhints_namespace.schema_model(\n    \"HintListSuccessResponse\", HintListSuccessResponse.apidoc()\n)\n\n\n@hints_namespace.route(\"\")\nclass HintList(Resource):\n    @admins_only\n    @hints_namespace.doc(\n        description=\"Endpoint to list Hint objects in bulk\",\n        responses={\n            200: (\"Success\", \"HintListSuccessResponse\"),\n            400: (\n                \"An error occured processing the provided or stored data\",\n                \"APISimpleErrorResponse\",\n            ),\n        },\n    )\n    @validate_args(\n        {\n            \"type\": (str, None),\n            \"challenge_id\": (int, None),\n            \"content\": (str, None),\n            \"cost\": (int, None),\n            \"q\": (str, None),\n            \"field\": (\n                RawEnum(\"HintFields\", {\"type\": \"type\", \"content\": \"content\"}),\n                None,\n            ),\n        },\n        location=\"query\",\n    )\n    def get(self, query_args):\n        q = query_args.pop(\"q\", None)\n        field = str(query_args.pop(\"field\", None))\n        filters = build_model_filters(model=Hints, query=q, field=field)\n\n        hints = Hints.query.filter_by(**query_args).filter(*filters).all()\n        response = HintSchema(many=True, view=\"locked\").dump(hints)\n\n        if response.errors:\n            return {\"success\": False, \"errors\": response.errors}, 400\n\n        return {\"success\": True, \"data\": response.data}\n\n    @admins_only\n    @hints_namespace.doc(\n        description=\"Endpoint to create a Hint object\",\n        responses={\n            200: (\"Success\", \"HintDetailedSuccessResponse\"),\n            400: (\n                \"An error occured processing the provided or stored data\",\n                \"APISimpleErrorResponse\",\n            ),\n        },\n    )\n    def post(self):\n        req = request.get_json()\n        schema = HintSchema(view=\"admin\")\n        response = schema.load(req, session=db.session)\n\n        if response.errors:\n            return {\"success\": False, \"errors\": response.errors}, 400\n\n        db.session.add(response.data)\n        db.session.commit()\n\n        response = schema.dump(response.data)\n\n        return {\"success\": True, \"data\": response.data}\n\n\n@hints_namespace.route(\"/<hint_id>\")\nclass Hint(Resource):\n    @during_ctf_time_only\n    @authed_only\n    @hints_namespace.doc(\n        description=\"Endpoint to get a specific Hint object\",\n        responses={\n            200: (\"Success\", \"HintDetailedSuccessResponse\"),\n            400: (\n                \"An error occured processing the provided or stored data\",\n                \"APISimpleErrorResponse\",\n            ),\n        },\n    )\n    def get(self, hint_id):\n        user = get_current_user()\n        hint = Hints.query.filter_by(id=hint_id).first_or_404()\n\n        view = \"unlocked\"\n        if hint.cost:\n            view = \"locked\"\n            unlocked = HintUnlocks.query.filter_by(\n                account_id=user.account_id, target=hint.id\n            ).first()\n            if unlocked:\n                view = \"unlocked\"\n\n        if is_admin():\n            if request.args.get(\"preview\", False):\n                view = \"admin\"\n\n        response = HintSchema(view=view).dump(hint)\n\n        if response.errors:\n            return {\"success\": False, \"errors\": response.errors}, 400\n\n        return {\"success\": True, \"data\": response.data}\n\n    @admins_only\n    @hints_namespace.doc(\n        description=\"Endpoint to edit a specific Hint object\",\n        responses={\n            200: (\"Success\", \"HintDetailedSuccessResponse\"),\n            400: (\n                \"An error occured processing the provided or stored data\",\n                \"APISimpleErrorResponse\",\n            ),\n        },\n    )\n    def patch(self, hint_id):\n        hint = Hints.query.filter_by(id=hint_id).first_or_404()\n        req = request.get_json()\n\n        schema = HintSchema(view=\"admin\")\n        response = schema.load(req, instance=hint, partial=True, session=db.session)\n\n        if response.errors:\n            return {\"success\": False, \"errors\": response.errors}, 400\n\n        db.session.add(response.data)\n        db.session.commit()\n\n        response = schema.dump(response.data)\n\n        return {\"success\": True, \"data\": response.data}\n\n    @admins_only\n    @hints_namespace.doc(\n        description=\"Endpoint to delete a specific Tag object\",\n        responses={200: (\"Success\", \"APISimpleSuccessResponse\")},\n    )\n    def delete(self, hint_id):\n        hint = Hints.query.filter_by(id=hint_id).first_or_404()\n        db.session.delete(hint)\n        db.session.commit()\n        db.session.close()\n\n        return {\"success\": True}\n", "path": "CTFd/api/v1/hints.py"}], "after_files": [{"content": "from typing import List\n\nfrom flask import request\nfrom flask_restx import Namespace, Resource\n\nfrom CTFd.api.v1.helpers.request import validate_args\nfrom CTFd.api.v1.helpers.schemas import sqlalchemy_to_pydantic\nfrom CTFd.api.v1.schemas import APIDetailedSuccessResponse, APIListSuccessResponse\nfrom CTFd.constants import RawEnum\nfrom CTFd.models import Hints, HintUnlocks, db\nfrom CTFd.schemas.hints import HintSchema\nfrom CTFd.utils.decorators import admins_only, authed_only, during_ctf_time_only\nfrom CTFd.utils.helpers.models import build_model_filters\nfrom CTFd.utils.user import get_current_user, is_admin\n\nhints_namespace = Namespace(\"hints\", description=\"Endpoint to retrieve Hints\")\n\nHintModel = sqlalchemy_to_pydantic(Hints)\n\n\nclass HintDetailedSuccessResponse(APIDetailedSuccessResponse):\n    data: HintModel\n\n\nclass HintListSuccessResponse(APIListSuccessResponse):\n    data: List[HintModel]\n\n\nhints_namespace.schema_model(\n    \"HintDetailedSuccessResponse\", HintDetailedSuccessResponse.apidoc()\n)\n\nhints_namespace.schema_model(\n    \"HintListSuccessResponse\", HintListSuccessResponse.apidoc()\n)\n\n\n@hints_namespace.route(\"\")\nclass HintList(Resource):\n    @admins_only\n    @hints_namespace.doc(\n        description=\"Endpoint to list Hint objects in bulk\",\n        responses={\n            200: (\"Success\", \"HintListSuccessResponse\"),\n            400: (\n                \"An error occured processing the provided or stored data\",\n                \"APISimpleErrorResponse\",\n            ),\n        },\n    )\n    @validate_args(\n        {\n            \"type\": (str, None),\n            \"challenge_id\": (int, None),\n            \"content\": (str, None),\n            \"cost\": (int, None),\n            \"q\": (str, None),\n            \"field\": (\n                RawEnum(\"HintFields\", {\"type\": \"type\", \"content\": \"content\"}),\n                None,\n            ),\n        },\n        location=\"query\",\n    )\n    def get(self, query_args):\n        q = query_args.pop(\"q\", None)\n        field = str(query_args.pop(\"field\", None))\n        filters = build_model_filters(model=Hints, query=q, field=field)\n\n        hints = Hints.query.filter_by(**query_args).filter(*filters).all()\n        response = HintSchema(many=True, view=\"locked\").dump(hints)\n\n        if response.errors:\n            return {\"success\": False, \"errors\": response.errors}, 400\n\n        return {\"success\": True, \"data\": response.data}\n\n    @admins_only\n    @hints_namespace.doc(\n        description=\"Endpoint to create a Hint object\",\n        responses={\n            200: (\"Success\", \"HintDetailedSuccessResponse\"),\n            400: (\n                \"An error occured processing the provided or stored data\",\n                \"APISimpleErrorResponse\",\n            ),\n        },\n    )\n    def post(self):\n        req = request.get_json()\n        schema = HintSchema(view=\"admin\")\n        response = schema.load(req, session=db.session)\n\n        if response.errors:\n            return {\"success\": False, \"errors\": response.errors}, 400\n\n        db.session.add(response.data)\n        db.session.commit()\n\n        response = schema.dump(response.data)\n\n        return {\"success\": True, \"data\": response.data}\n\n\n@hints_namespace.route(\"/<hint_id>\")\nclass Hint(Resource):\n    @during_ctf_time_only\n    @authed_only\n    @hints_namespace.doc(\n        description=\"Endpoint to get a specific Hint object\",\n        responses={\n            200: (\"Success\", \"HintDetailedSuccessResponse\"),\n            400: (\n                \"An error occured processing the provided or stored data\",\n                \"APISimpleErrorResponse\",\n            ),\n        },\n    )\n    def get(self, hint_id):\n        user = get_current_user()\n        hint = Hints.query.filter_by(id=hint_id).first_or_404()\n\n        if hint.requirements:\n            requirements = hint.requirements.get(\"prerequisites\", [])\n\n            # Get the IDs of all hints that the user has unlocked\n            all_unlocks = HintUnlocks.query.filter_by(account_id=user.account_id).all()\n            unlock_ids = {unlock.id for unlock in all_unlocks}\n\n            # Filter out hint IDs that don't exist\n            all_hint_ids = {h.id for h in Hints.query.with_entities(Hints.id).all()}\n            prereqs = set(requirements).intersection(all_hint_ids)\n\n            # If the user has the necessary unlocks or is admin we should allow them to view\n            if unlock_ids >= prereqs or is_admin():\n                pass\n            else:\n                return (\n                    {\n                        \"success\": False,\n                        \"errors\": {\n                            \"requirements\": [\n                                \"You must unlock other hints before accessing this hint\"\n                            ]\n                        },\n                    },\n                    403,\n                )\n\n        view = \"unlocked\"\n        if hint.cost:\n            view = \"locked\"\n            unlocked = HintUnlocks.query.filter_by(\n                account_id=user.account_id, target=hint.id\n            ).first()\n            if unlocked:\n                view = \"unlocked\"\n\n        if is_admin():\n            if request.args.get(\"preview\", False):\n                view = \"admin\"\n\n        response = HintSchema(view=view).dump(hint)\n\n        if response.errors:\n            return {\"success\": False, \"errors\": response.errors}, 400\n\n        return {\"success\": True, \"data\": response.data}\n\n    @admins_only\n    @hints_namespace.doc(\n        description=\"Endpoint to edit a specific Hint object\",\n        responses={\n            200: (\"Success\", \"HintDetailedSuccessResponse\"),\n            400: (\n                \"An error occured processing the provided or stored data\",\n                \"APISimpleErrorResponse\",\n            ),\n        },\n    )\n    def patch(self, hint_id):\n        hint = Hints.query.filter_by(id=hint_id).first_or_404()\n        req = request.get_json()\n\n        schema = HintSchema(view=\"admin\")\n        response = schema.load(req, instance=hint, partial=True, session=db.session)\n\n        if response.errors:\n            return {\"success\": False, \"errors\": response.errors}, 400\n\n        db.session.add(response.data)\n        db.session.commit()\n\n        response = schema.dump(response.data)\n\n        return {\"success\": True, \"data\": response.data}\n\n    @admins_only\n    @hints_namespace.doc(\n        description=\"Endpoint to delete a specific Tag object\",\n        responses={200: (\"Success\", \"APISimpleSuccessResponse\")},\n    )\n    def delete(self, hint_id):\n        hint = Hints.query.filter_by(id=hint_id).first_or_404()\n        db.session.delete(hint)\n        db.session.commit()\n        db.session.close()\n\n        return {\"success\": True}\n", "path": "CTFd/api/v1/hints.py"}]}