HSB-431 fix: email case sensitive in email provider (#4042)

* feat: code level email insensitivity added

* test: fix broken test case

* chore: updated testcase for findUserByEmail in user module

---------

Co-authored-by: Balu Babu <balub997@gmail.com>

packages/hoppscotch-backend/src/admin/admin.service.spec.ts

@@ -121,6 +121,7 @@ describe('AdminService', () => {
           NOT: {
             inviteeEmail: {
               in: [dbAdminUsers[0].email],
+              mode: 'insensitive',
             },
           },
         },
@@ -229,7 +230,10 @@ describe('AdminService', () => {
 
       expect(mockPrisma.invitedUsers.deleteMany).toHaveBeenCalledWith({
         where: {
-          inviteeEmail: { in: [invitedUsers[0].inviteeEmail] },
+          inviteeEmail: {
+            in: [invitedUsers[0].inviteeEmail],
+            mode: 'insensitive',
+          },
         },
       });
       expect(result).toEqualRight(true);

packages/hoppscotch-backend/src/admin/admin.service.ts

@@ -89,12 +89,17 @@ export class AdminService {
     adminEmail: string,
     inviteeEmail: string,
   ) {
-    if (inviteeEmail == adminEmail) return E.left(DUPLICATE_EMAIL);
+    if (inviteeEmail.toLowerCase() == adminEmail.toLowerCase()) {
+      return E.left(DUPLICATE_EMAIL);
+    }
     if (!validateEmail(inviteeEmail)) return E.left(INVALID_EMAIL);
 
     const alreadyInvitedUser = await this.prisma.invitedUsers.findFirst({
       where: {
-        inviteeEmail: inviteeEmail,
+        inviteeEmail: {
+          equals: inviteeEmail,
+          mode: 'insensitive',
+        },
       },
     });
     if (alreadyInvitedUser != null) return E.left(USER_ALREADY_INVITED);
@@ -159,7 +164,7 @@ export class AdminService {
     try {
       await this.prisma.invitedUsers.deleteMany({
         where: {
-          inviteeEmail: { in: inviteeEmails },
+          inviteeEmail: { in: inviteeEmails, mode: 'insensitive' },
         },
       });
       return E.right(true);
@@ -189,6 +194,7 @@ export class AdminService {
         NOT: {
           inviteeEmail: {
             in: userEmailObjs.map((user) => user.email),
+            mode: 'insensitive',
           },
         },
       },