refactor: team invitation module in pseudo fp-ts (#3175)

packages/hoppscotch-backend/src/team-invitation/team-invitee.guard.ts

@@ -1,9 +1,6 @@
 import { CanActivate, ExecutionContext, Injectable } from '@nestjs/common';
 import { TeamInvitationService } from './team-invitation.service';
-import { pipe, flow } from 'fp-ts/function';
 import * as O from 'fp-ts/Option';
-import * as T from 'fp-ts/Task';
-import * as TE from 'fp-ts/TaskEither';
 import { GqlExecutionContext } from '@nestjs/graphql';
 import {
   BUG_AUTH_NO_USER_CTX,
@@ -23,45 +20,26 @@ export class TeamInviteeGuard implements CanActivate {
   constructor(private readonly teamInviteService: TeamInvitationService) {}
 
   async canActivate(context: ExecutionContext): Promise<boolean> {
-    return pipe(
-      TE.Do,
+    // Get GQL Context
+    const gqlExecCtx = GqlExecutionContext.create(context);
 
-      // Get execution context
-      TE.bindW('gqlCtx', () => TE.of(GqlExecutionContext.create(context))),
+    // Get user
+    const { user } = gqlExecCtx.getContext().req;
+    if (!user) throwErr(BUG_AUTH_NO_USER_CTX);
 
-      // Get user
-      TE.bindW('user', ({ gqlCtx }) =>
-        pipe(
-          O.fromNullable(gqlCtx.getContext().req.user),
-          TE.fromOption(() => BUG_AUTH_NO_USER_CTX),
-        ),
-      ),
+    // Get the invite
+    const { inviteID } = gqlExecCtx.getArgs<{ inviteID: string }>();
+    if (!inviteID) throwErr(BUG_TEAM_INVITE_NO_INVITE_ID);
 
-      // Get invite
-      TE.bindW('invite', ({ gqlCtx }) =>
-        pipe(
-          O.fromNullable(gqlCtx.getArgs<{ inviteID?: string }>().inviteID),
-          TE.fromOption(() => BUG_TEAM_INVITE_NO_INVITE_ID),
-          TE.chainW(
-            flow(
-              this.teamInviteService.getInvitation,
-              TE.fromTaskOption(() => TEAM_INVITE_NO_INVITE_FOUND),
-            ),
-          ),
-        ),
-      ),
+    const invitation = await this.teamInviteService.getInvitation(inviteID);
+    if (O.isNone(invitation)) throwErr(TEAM_INVITE_NO_INVITE_FOUND);
 
-      // Check if the emails match
-      TE.chainW(
-        TE.fromPredicate(
-          ({ user, invite }) =>
-            user.email.toLowerCase() === invite.inviteeEmail.toLowerCase(),
-          () => TEAM_INVITE_EMAIL_DO_NOT_MATCH,
-        ),
-      ),
+    if (
+      user.email.toLowerCase() !== invitation.value.inviteeEmail.toLowerCase()
+    ) {
+      throwErr(TEAM_INVITE_EMAIL_DO_NOT_MATCH);
+    }
 
-      // Fold it to a promise
-      TE.fold(throwErr, () => T.of(true)),
-    )();
+    return true;
   }
 }