Feat/shareable brains open link authenticated (#676)

* ♻️ use Single Responsibility Principle on brains_subscription

* ✨ new brain subscription endpoints for invited user

* 📝 add documentation to endpoints

* 🎨 add base_frontend_url to send custom url for brain share

* ✏️ brains instead of brain in url

* ✨ use origin in header for frontend url in subscription email

* 🚚 move and remove unused code

* ✨ new subscription API for BE endpoints in frontend

* ✨ new addBrain to  add a shared brain in frontend

* 🥚 new hook for brain invitations

* ✨ new page for brain invitation

* ✨ change frontend url to copy for brain subscription

* ✏️ call RBAC with wrapper function

* ✏️ last typos

backend/core/models/brains_subscription_invitations.py

@@ -10,10 +10,9 @@ logger = get_logger(__name__)
 
 
 class BrainSubscription(BaseModel):
-    brain_id: Optional[UUID] = None
-    inviter_email: Optional[str]
-    email: Optional[str]
-    rights: Optional[str]
+    brain_id: UUID
+    email: str
+    rights: str = "Viewer"
 
     class Config:
         arbitrary_types_allowed = True
@@ -65,36 +64,4 @@ class BrainSubscription(BaseModel):
         else:
             response = self.create_subscription_invitation()
 
-        return response
-
-    def get_brain_url(self) -> str:
-        """Generates the brain URL based on the brain_id."""
-        base_url = "https://www.quivr.app/chat"
-        return f"{base_url}?brain_subscription_invitation={self.brain_id}"
-
-    def resend_invitation_email(self):
-        brains_settings = BrainSettings()  # pyright: ignore reportPrivateUsage=none
-        resend.api_key = brains_settings.resend_api_key
-
-        brain_url = self.get_brain_url()
-
-        html_body = f"""
-        <p>This brain has been shared with you by {self.inviter_email}.</p>
-        <p><a href='{brain_url}'>Click here</a> to access your brain.</p>
-        """
-
-        try:
-            r = resend.Emails.send(
-                {
-                    "from": brains_settings.resend_email_address,
-                    "to": self.email,
-                    "subject": "Quivr - Brain Shared With You",
-                    "html": html_body,
-                }
-            )
-            print("Resend response", r)
-        except Exception as e:
-            logger.error(f"Error sending email: {e}")
-            return
-
-        return r
+        return response

backend/core/repository/brain_subscription/get_brain_url.py

@@ -0,0 +1,8 @@
+import os
+from uuid import UUID
+
+
+def get_brain_url(origin: str, brain_id: UUID) -> str:
+    """Generates the brain URL based on the brain_id."""
+
+    return f"{origin}/invitation/{brain_id}"

backend/core/repository/brain_subscription/resend_invitation_email.py

@@ -0,0 +1,37 @@
+import os
+from typing import Optional
+from uuid import UUID
+
+import resend
+from logger import get_logger
+from models.brains_subscription_invitations import BrainSubscription
+from models.settings import BrainSettings
+from repository.brain_subscription.get_brain_url import get_brain_url
+
+logger = get_logger(__name__)
+
+
+def resend_invitation_email(brain_subscription: BrainSubscription, inviter_email: str, origin: str = "https://www.quivr.app"):
+    brains_settings = BrainSettings()  # pyright: ignore reportPrivateUsage=none
+    resend.api_key = brains_settings.resend_api_key
+
+    brain_url = get_brain_url(origin, brain_subscription.brain_id)
+
+    html_body = f"""
+    <p>This brain has been shared with you by {inviter_email}.</p>
+    <p><a href='{brain_url}'>Click here</a> to access your brain.</p>
+    """
+
+    try:
+        r = resend.Emails.send({
+            "from": "onboarding@resend.dev",
+            "to": brain_subscription.email,
+            "subject": "Quivr - Brain Shared With You",
+            "html": html_body
+        })
+        logger.info('Resend response', r)
+    except Exception as e:
+        logger.error(f"Error sending email: {e}")
+        return
+
+    return r

backend/core/repository/brain_subscription/subscription_invitation_service.py

@@ -0,0 +1,78 @@
+from typing import Optional
+from uuid import UUID
+
+from logger import get_logger
+from models.brains_subscription_invitations import BrainSubscription
+from models.settings import CommonsDep, common_dependencies
+
+logger = get_logger(__name__)
+
+
+class SubscriptionInvitationService:
+    def __init__(self, commons: Optional[CommonsDep] = None):
+        self.commons = common_dependencies()
+
+    def create_subscription_invitation(self, brain_subscription: BrainSubscription):
+        logger.info("Creating subscription invitation")
+        response = (
+            self.commons["supabase"]
+            .table("brain_subscription_invitations")
+            .insert({"brain_id": str(brain_subscription.brain_id), "email": brain_subscription.email, "rights": brain_subscription.rights})
+            .execute()
+        )
+        return response.data
+
+    def update_subscription_invitation(self, brain_subscription: BrainSubscription):
+        logger.info('Updating subscription invitation')
+        response = (
+            self.commons["supabase"]
+            .table("brain_subscription_invitations")
+            .update({"rights": brain_subscription.rights})
+            .eq("brain_id", str(brain_subscription.brain_id))
+            .eq("email", brain_subscription.email)
+            .execute()
+        )
+        return response.data
+
+    def create_or_update_subscription_invitation(self, brain_subscription: BrainSubscription):
+        response = self.commons["supabase"].table("brain_subscription_invitations").select("*").eq("brain_id", str(brain_subscription.brain_id)).eq("email", brain_subscription.email).execute()
+
+        if response.data:
+            response = self.update_subscription_invitation(brain_subscription)
+        else:
+           response = self.create_subscription_invitation(brain_subscription)
+
+        return response
+
+    def check_invitation(self, brain_subscription: BrainSubscription):
+        response = self.commons["supabase"].table("brain_subscription_invitations").select("*").eq("brain_id", str(brain_subscription.brain_id)).eq("email", brain_subscription.email).execute()
+        return response.data != []
+
+    def fetch_invitation(self, subscription: BrainSubscription):
+        logger.info("Fetching subscription invitation")
+        response = (
+            self.commons["supabase"]
+            .table("brain_subscription_invitations")
+            .select("*")
+            .eq("brain_id", str(subscription.brain_id))
+            .eq("email", subscription.email)
+            .execute()
+        )
+        if response.data:
+            return response.data[0]  # return the first matching invitation
+        else:
+            return None
+    
+    def remove_invitation(self, subscription: BrainSubscription):
+        logger.info(f"Removing subscription invitation for email {subscription.email} and brain {subscription.brain_id}")
+        response = (
+            self.commons["supabase"]
+            .table("brain_subscription_invitations")
+            .delete()
+            .eq("brain_id", str(subscription.brain_id))
+            .eq("email", subscription.email)
+            .execute()
+        )
+        logger.info(f"Removed subscription invitation for email {subscription.email} and brain {subscription.brain_id}")
+        logger.info(response)
+        return response.data

backend/core/routes/brain_routes.py

@@ -3,14 +3,10 @@ from uuid import UUID
 from auth import AuthBearer, get_current_user
 from fastapi import APIRouter, Depends, HTTPException
 from logger import get_logger
-from models.brains import (
-    Brain,
-    get_default_user_brain,
-    get_default_user_brain_or_create_new,
-)
+from models.brains import (Brain, get_default_user_brain,
+                           get_default_user_brain_or_create_new)
 from models.settings import common_dependencies
 from models.users import User
-
 from routes.authorizations.brain_authorization import has_brain_authorization
 
 logger = get_logger(__name__)

backend/core/routes/explore_routes.py

@@ -6,9 +6,7 @@ from models.brains import Brain
 from models.settings import common_dependencies
 from models.users import User
 from routes.authorizations.brain_authorization import (
-    has_brain_authorization,
-    validate_brain_authorization,
-)
+    has_brain_authorization, validate_brain_authorization)
 
 explore_router = APIRouter()
 

backend/core/routes/headers/get_origin_header.py

@@ -0,0 +1,7 @@
+from typing import Optional
+
+from fastapi import Header
+
+
+def get_origin_header(origin: Optional[str] = Header(None)):
+    return origin

backend/core/routes/subscription_routes.py

@@ -1,3 +1,4 @@
+import os
 from typing import List
 from uuid import UUID
 
@@ -6,32 +7,42 @@ from fastapi import APIRouter, Depends, HTTPException
 from models.brains import Brain
 from models.brains_subscription_invitations import BrainSubscription
 from models.users import User
+from repository.brain_subscription.resend_invitation_email import \
+    resend_invitation_email
+from repository.brain_subscription.subscription_invitation_service import \
+    SubscriptionInvitationService
 from repository.user.get_user_email_by_user_id import get_user_email_by_user_id
-
-from routes.authorizations.brain_authorization import (
-    has_brain_authorization,
-)
+from routes.authorizations.brain_authorization import has_brain_authorization
+from routes.headers.get_origin_header import get_origin_header
 
 subscription_router = APIRouter()
+subscription_service = SubscriptionInvitationService()
 
 
-@subscription_router.post("/brain/{brain_id}/subscription")
-async def invite_user_to_brain(
-    brain_id: UUID, users: List[dict], current_user: User = Depends(get_current_user)
-):
-    # TODO: Ensure the current user has permissions to invite users to this brain
+@subscription_router.post(
+    "/brains/{brain_id}/subscription",
+    dependencies=[
+        Depends(
+            AuthBearer(),      
+        ),
+        Depends(has_brain_authorization),
+        Depends(get_origin_header),
+    ],
+    tags=["BrainSubscription"],
+)
+def invite_users_to_brain(brain_id: UUID, users: List[dict], origin: str = Depends(get_origin_header), current_user: User = Depends(get_current_user)):
+    """
+    Invite multiple users to a brain by their emails. This function creates
+    or updates a brain subscription invitation for each user and sends an
+    invitation email to each user.
+    """
 
     for user in users:
-        subscription = BrainSubscription(
-            brain_id=brain_id,
-            email=user["email"],
-            rights=user["rights"],
-            inviter_email=current_user.email or "Quivr",
-        )
-
+        subscription = BrainSubscription(brain_id=brain_id, email=user['email'], rights=user['rights'])
+        
         try:
-            subscription.create_or_update_subscription_invitation()
-            subscription.resend_invitation_email()
+            subscription_service.create_or_update_subscription_invitation(subscription)
+            resend_invitation_email(subscription, inviter_email=current_user.email or "Quivr", origin=origin)
         except Exception as e:
             raise HTTPException(status_code=400, detail=f"Error inviting user: {e}")
 
@@ -39,7 +50,7 @@ async def invite_user_to_brain(
 
 
 @subscription_router.get(
-    "/brain/{brain_id}/users",
+    "/brains/{brain_id}/users",
     dependencies=[Depends(AuthBearer()), Depends(has_brain_authorization())],
 )
 def get_brain_users(
@@ -66,7 +77,7 @@ def get_brain_users(
 
 
 @subscription_router.delete(
-    "/brain/{brain_id}/subscription",
+    "/brains/{brain_id}/subscription",
 )
 async def remove_user_subscription(
     brain_id: UUID, current_user: User = Depends(get_current_user)
@@ -101,3 +112,91 @@ async def remove_user_subscription(
             brain.delete_user_from_brain(current_user.id)
 
     return {"message": f"Subscription removed successfully from brain {brain_id}"}
+
+
+@subscription_router.get(
+    "/brains/{brain_id}/subscription",
+    dependencies=[Depends(AuthBearer())],
+    tags=["BrainSubscription"],
+)
+def get_user_invitation(brain_id: UUID, current_user: User = Depends(get_current_user)):
+    """
+    Get an invitation to a brain for a user. This function checks if the user
+    has been invited to the brain and returns the invitation status.
+    """
+    if not current_user.email:
+        raise HTTPException(status_code=400, detail="User email is not defined")
+
+    subscription = BrainSubscription(brain_id=brain_id, email=current_user.email)
+
+    has_invitation = subscription_service.check_invitation(subscription)
+    return {"hasInvitation": has_invitation}
+
+
+@subscription_router.post(
+    "/brains/{brain_id}/subscription/accept",
+    tags=["Brain"],
+)
+async def accept_invitation(brain_id: UUID, current_user: User = Depends(get_current_user)):
+    """
+    Accept an invitation to a brain for a user. This function removes the
+    invitation from the subscription invitations and adds the user to the
+    brain users.
+    """
+    if not current_user.email:
+        raise HTTPException(status_code=400, detail="User email is not defined")
+
+    subscription = BrainSubscription(brain_id=brain_id, email=current_user.email)
+
+    try:
+        invitation = subscription_service.fetch_invitation(subscription)
+    except Exception as e:
+        raise HTTPException(status_code=400, detail=f"Error fetching invitation: {e}")
+
+    if not invitation:
+        raise HTTPException(status_code=404, detail="Invitation not found")
+
+    try:
+        brain = Brain(id=brain_id)
+        brain.create_brain_user(
+            user_id=current_user.id, rights=invitation['rights'], default_brain=False
+        )
+    except Exception as e:
+        raise HTTPException(status_code=400, detail=f"Error adding user to brain: {e}")
+
+    try:
+        subscription_service.remove_invitation(subscription)
+    except Exception as e:
+        raise HTTPException(status_code=400, detail=f"Error removing invitation: {e}")
+
+    return {"message": "Invitation accepted successfully"}
+
+
+@subscription_router.post(
+    "/brains/{brain_id}/subscription/decline",
+    tags=["Brain"],
+)
+async def decline_invitation(brain_id: UUID, current_user: User = Depends(get_current_user)):
+    """
+    Decline an invitation to a brain for a user. This function removes the
+    invitation from the subscription invitations.
+    """
+    if not current_user.email:
+        raise HTTPException(status_code=400, detail="User email is not defined")
+
+    subscription = BrainSubscription(brain_id=brain_id, email=current_user.email)
+
+    try:
+        invitation = subscription_service.fetch_invitation(subscription)
+    except Exception as e:
+        raise HTTPException(status_code=400, detail=f"Error fetching invitation: {e}")
+    
+    if not invitation:
+        raise HTTPException(status_code=404, detail="Invitation not found")
+
+    try:
+        subscription_service.remove_invitation(subscription)
+    except Exception as e:
+        raise HTTPException(status_code=400, detail=f"Error removing invitation: {e}")
+
+    return {"message": "Invitation declined successfully"}

backend/core/tests/test_brains.py

@@ -118,7 +118,7 @@ def test_delete_all_brains(client, api_key):
 
         # Send a DELETE request to delete the specific brain
         delete_response = client.delete(
-            f"/brain/{brain_id}/subscription",
+            f"/brains/{brain_id}/subscription",
             headers={"Authorization": "Bearer " + api_key},
         )
 

frontend/app/invitation/[brainId]/hooks/useInvitation.ts

@@ -0,0 +1,142 @@
+/* eslint-disable max-lines */
+"use client";
+import { UUID } from "crypto";
+import { useParams, useRouter } from "next/navigation";
+import { useCallback, useEffect, useState } from "react";
+
+import { useSubscriptionApi } from "@/lib/api/subscription/useSubscriptionApi";
+import { useBrainContext } from "@/lib/context/BrainProvider/hooks/useBrainContext";
+import { useToast } from "@/lib/hooks";
+
+interface UseInvitationReturn {
+  brainId: UUID | undefined;
+  handleAccept: () => Promise<void>;
+  handleDecline: () => Promise<void>;
+  isValidInvitation: boolean;
+  isLoading: boolean;
+}
+
+export const useInvitation = (): UseInvitationReturn => {
+  const params = useParams();
+  const brainId = params?.brainId as UUID | undefined;
+  const { publish } = useToast();
+  if (brainId === undefined) {
+    throw new Error("Brain ID is undefined");
+  }
+
+  const [isLoading, setIsLoading] = useState(false);
+  const [isValidInvitation, setIsValidInvitation] = useState(false);
+  const { acceptInvitation, declineInvitation } = useSubscriptionApi();
+  const checkValidInvitation = useCallback(
+    useSubscriptionApi().checkValidInvitation,
+    []
+  );
+
+  const { addBrain, setActiveBrain } = useBrainContext();
+  const router = useRouter();
+  // Check invitation on component mount
+  useEffect(() => {
+    setIsLoading(true);
+
+    const checkInvitationValidity = async () => {
+      try {
+        console.log("Checking invitation validity...");
+        const validInvitation = await checkValidInvitation(brainId);
+        setIsValidInvitation(validInvitation);
+        console.log("validInvitation", validInvitation);
+        if (!validInvitation) {
+          publish({
+            variant: "warning",
+            text: "This invitation is not valid.",
+          });
+          router.push("/");
+        }
+      } catch (error) {
+        console.error("Error checking invitation validity:", error);
+      } finally {
+        setIsLoading(false);
+      }
+    };
+    checkInvitationValidity().catch((error) => {
+      console.error("Error checking invitation validity:", error);
+    });
+  }, [brainId, checkValidInvitation]);
+
+  const handleAccept = async () => {
+    // API call to accept the invitation
+    // After success, redirect user to a specific page ->  chat page
+    try {
+      const response = await acceptInvitation(brainId);
+      console.log(response.message);
+
+      await addBrain(brainId);
+      setActiveBrain({ id: brainId, name: "BrainName" });
+
+      //set brainId as active brain
+      publish({
+        variant: "success",
+        text: JSON.stringify(response.message),
+      });
+    } catch (error) {
+      // @ts-ignore Error is of unknown type
+      // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
+      if (error.response.data.detail !== undefined) {
+        publish({
+          variant: "danger",
+          // @ts-ignore Error is of unknown type
+          // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment, @typescript-eslint/no-unsafe-member-access
+          text: error.response.data.detail,
+        });
+      } else {
+        console.error("Error calling the API:", error);
+        publish({
+          variant: "danger",
+          text: "An unknown error occurred while accepting the invitaiton",
+        });
+      }
+    } finally {
+      void router.push("/chat");
+    }
+  };
+
+  const handleDecline = async () => {
+    // API call to accept the invitation
+    // After success, redirect user to a specific page ->  home page
+    try {
+      const response = await declineInvitation(brainId);
+      console.log(response.message);
+
+      publish({
+        variant: "success",
+        text: JSON.stringify(response.message),
+      });
+    } catch (error) {
+      // @ts-ignore Error is of unknown type
+      // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
+      if (error.response.data.detail !== undefined) {
+        publish({
+          variant: "danger",
+          // @ts-ignore Error is of unknown type
+          // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment, @typescript-eslint/no-unsafe-member-access
+          text: error.response.data.detail,
+        });
+      } else {
+        console.error("Error calling the API:", error);
+        publish({
+          variant: "danger",
+          text: "An unknown error occurred while declining the invitaiton",
+        });
+      }
+    } finally {
+      void router.push("/upload");
+    }
+  };
+
+  return {
+    brainId,
+    handleAccept,
+    handleDecline,
+    isValidInvitation,
+    isLoading,
+  };
+};

frontend/app/invitation/[brainId]/page.tsx

@@ -0,0 +1,52 @@
+"use client";
+
+import Button from "@/lib/components/ui/Button";
+import PageHeading from "@/lib/components/ui/PageHeading";
+import Spinner from "@/lib/components/ui/Spinner";
+import { useSupabase } from "@/lib/context/SupabaseProvider";
+import { redirectToLogin } from "@/lib/router/redirectToLogin";
+
+import { useInvitation } from "./hooks/useInvitation";
+
+const InvitationPage = (): JSX.Element => {
+  const { handleAccept, handleDecline, isLoading } = useInvitation();
+  const { session } = useSupabase();
+  // Show the loader while invitation validity is being checked
+  if (isLoading) {
+    return <Spinner />;
+  }
+
+  // TODO: Modify this to fetch the brain name from the database
+  const brain = { name: "TestBrain" };
+
+  if (session?.user === undefined) {
+    redirectToLogin();
+  }
+
+  return (
+    <main className="pt-10">
+      <PageHeading
+        title={`Welcome to ${brain.name}!`}
+        subtitle="You have been exclusively invited to join this brain and start exploring. Do you accept this exciting journey?"
+      />
+      <div className="flex flex-col items-center justify-center gap-5 mt-5">
+        <Button
+          onClick={() => void handleAccept()}
+          variant={"secondary"}
+          className="py-3"
+        >
+          Yes, count me in!
+        </Button>
+        <Button
+          onClick={() => void handleDecline()}
+          variant={"danger"}
+          className="py-3"
+        >
+          No, thank you.
+        </Button>
+      </div>
+    </main>
+  );
+};
+
+export default InvitationPage;

frontend/lib/api/brain/__tests__/useBrainApi.test.ts

@@ -70,7 +70,7 @@ describe("useBrainApi", () => {
     await deleteBrain(id);
 
     expect(axiosDeleteMock).toHaveBeenCalledTimes(1);
-    expect(axiosDeleteMock).toHaveBeenCalledWith(`/brain/${id}/subscription`);
+    expect(axiosDeleteMock).toHaveBeenCalledWith(`/brains/${id}/subscription`);
   });
 
   it("should call getDefaultBrain with the correct parameters", async () => {
@@ -127,7 +127,7 @@ describe("useBrainApi", () => {
 
     expect(axiosPostMock).toHaveBeenCalledTimes(1);
     expect(axiosPostMock).toHaveBeenCalledWith(
-      `/brain/${id}/subscription`,
+      `/brains/${id}/subscription`,
       subscriptions
     );
   });
@@ -142,6 +142,6 @@ describe("useBrainApi", () => {
     await getBrainUsers(id);
 
     expect(axiosGetMock).toHaveBeenCalledTimes(1);
-    expect(axiosGetMock).toHaveBeenCalledWith(`/brain/${id}/users`);
+    expect(axiosGetMock).toHaveBeenCalledWith(`/brains/${id}/users`);
   });
 });

frontend/lib/api/brain/brain.ts

@@ -40,7 +40,7 @@ export const deleteBrain = async (
   brainId: string,
   axiosInstance: AxiosInstance
 ): Promise<void> => {
-  await axiosInstance.delete(`/brain/${brainId}/subscription`);
+  await axiosInstance.delete(`/brains/${brainId}/subscription`);
 };
 
 export const getDefaultBrain = async (
@@ -68,13 +68,13 @@ export const addBrainSubscriptions = async (
   subscriptions: Subscription[],
   axiosInstance: AxiosInstance
 ): Promise<void> => {
-  await axiosInstance.post(`/brain/${brainId}/subscription`, subscriptions);
+  await axiosInstance.post(`/brains/${brainId}/subscription`, subscriptions);
 };
 
 export const getBrainUsers = async (
   brainId: string,
   axiosInstance: AxiosInstance
 ): Promise<Subscription[]> => {
-  return (await axiosInstance.get<Subscription[]>(`/brain/${brainId}/users`))
+  return (await axiosInstance.get<Subscription[]>(`/brains/${brainId}/users`))
     .data;
 };

frontend/lib/api/subscription/subscription.ts

@@ -0,0 +1,43 @@
+import { AxiosInstance } from "axios";
+import { UUID } from "crypto";
+
+export const acceptInvitation = async (
+  brainId: UUID,
+  axiosInstance: AxiosInstance
+): Promise<{ message: string }> => {
+  const acceptedInvitation = (
+    await axiosInstance.post<{ message: string }>(
+      `/brains/${brainId}/subscription/accept`
+    )
+  ).data;
+
+  console.log("acceptedInvitation", acceptedInvitation);
+
+  return acceptedInvitation;
+};
+
+export const declineInvitation = async (
+  brainId: UUID,
+  axiosInstance: AxiosInstance
+): Promise<{ message: string }> => {
+  const deletedInvitation = (
+    await axiosInstance.post<{ message: string }>(
+      `/brains/${brainId}/subscription/decline`
+    )
+  ).data;
+
+  return deletedInvitation;
+};
+
+export const checkValidInvitation = async (
+  brainId: UUID,
+  axiosInstance: AxiosInstance
+): Promise<boolean> => {
+  const answer = await axiosInstance.get<{ hasInvitation: boolean }>(
+    `/brains/${brainId}/subscription`
+  );
+  const toto = answer.data["hasInvitation"];
+  console.log(answer);
+
+  return toto;
+};

frontend/lib/api/subscription/useSubscriptionApi.ts

@@ -0,0 +1,23 @@
+import { UUID } from "crypto";
+
+import { useAxios } from "@/lib/hooks";
+
+import {
+  acceptInvitation,
+  checkValidInvitation,
+  declineInvitation,
+} from "./subscription";
+
+// eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
+export const useSubscriptionApi = () => {
+  const { axiosInstance } = useAxios();
+
+  return {
+    acceptInvitation: async (brainId: UUID) =>
+      acceptInvitation(brainId, axiosInstance),
+    declineInvitation: async (brainId: UUID) =>
+      declineInvitation(brainId, axiosInstance),
+    checkValidInvitation: async (brainId: UUID) =>
+      checkValidInvitation(brainId, axiosInstance),
+  };
+};

frontend/lib/components/NavBar/components/NavItems/components/BrainsDropDown/components/BrainActions/components/ShareBrain/hooks/useShareBrain.ts

@@ -19,7 +19,7 @@ export const useShareBrain = (brainId: string) => {
   >([generateBrainAssignation()]);
 
   const baseUrl = window.location.origin;
-  const brainShareLink = `${baseUrl}/brain_subscription_invitation=${brainId}`;
+  const brainShareLink = `${baseUrl}/invitation/${brainId}`;
 
   const { publish } = useToast();
   const { addBrainSubscriptions, getBrainUsers } = useBrainApi();

frontend/lib/context/BrainProvider/hooks/useBrainProvider.ts

@@ -18,7 +18,7 @@ import { Brain } from "../types";
 export const useBrainProvider = () => {
   const { publish } = useToast();
   const { track } = useEventTracking();
-  const { createBrain, deleteBrain, getBrains, getDefaultBrain } =
+  const { createBrain, deleteBrain, getBrains, getDefaultBrain, getBrain } =
     useBrainApi();
 
   const [allBrains, setAllBrains] = useState<Brain[]>([]);
@@ -45,6 +45,28 @@ export const useBrainProvider = () => {
     }
   };
 
+  const addBrain = async (id: UUID): Promise<void> => {
+    const brain = await getBrain(id);
+    if (brain === undefined) {
+      publish({
+        variant: "danger",
+        text: "Error occurred while adding a brain",
+      });
+
+      return;
+    }
+    try {
+      setAllBrains((prevBrains) => [...prevBrains, brain]);
+      saveBrainInLocalStorage(brain);
+      void track("BRAIN_ADDED");
+    } catch {
+      publish({
+        variant: "danger",
+        text: "Error occurred while adding a brain",
+      });
+    }
+  };
+
   const deleteBrainHandler = async (id: UUID) => {
     await deleteBrain(id);
     setAllBrains((prevBrains) => prevBrains.filter((brain) => brain.id !== id));
@@ -102,6 +124,7 @@ export const useBrainProvider = () => {
     allBrains,
     createBrain: createBrainHandler,
     deleteBrain: deleteBrainHandler,
+    addBrain,
     setActiveBrain,
     fetchAllBrains,
     setDefaultBrain,