feat: implement group detail view and editing functionality with backend integration

Author: rishnudk

apps/api/src/modules/group/group.router.ts

@@ -36,4 +36,10 @@ export const groupRouter = router({
         .mutation(({ ctx, input }) =>
             GroupService.createGroup(ctx.prisma, ctx.session.user.id, input)
         ),
+
+    updateGroup: protectedProcedure
+        .input(GroupSchema.updateGroupSchema)
+        .mutation(({ ctx, input }) =>
+            GroupService.updateGroup(ctx.prisma, ctx.session.user.id, input.groupId, input)
+        ),
 });

apps/api/src/modules/group/group.schema.ts

@@ -12,3 +12,13 @@ export const createGroupSchema = z.object({
     privacy: z.enum(["PUBLIC", "PRIVATE"]),
     image: z.string().optional(),
 });
+
+// updateGroup
+export const updateGroupSchema = z.object({
+    groupId: z.string(),
+    name: z.string().min(3).max(50).optional(),
+    description: z.string().max(200).optional(),
+    privacy: z.enum(["PUBLIC", "PRIVATE"]).optional(),
+    image: z.string().optional(),
+    guidelines: z.string().max(1000).optional(),
+});

apps/api/src/modules/group/group.service.ts

@@ -100,6 +100,7 @@ export async function getGroupById(
         guidelines: group.guidelines,
         memberCount: group._count.members,
         isMember: group.members.length > 0,
+        isAdmin: group.members[0]?.role === "ADMIN",
     };
 }
 
@@ -249,3 +250,38 @@ export async function createGroup(
         },
     });
 }
+
+// ──────────────────────────────────────────────
+// UPDATE GROUP
+// ──────────────────────────────────────────────
+export async function updateGroup(
+    prisma: PrismaClient,
+    userId: string,
+    groupId: string,
+    input: { name?: string; description?: string; privacy?: "PUBLIC" | "PRIVATE"; image?: string; guidelines?: string }
+) {
+    // Check if the user is an admin
+    const member = await prisma.groupMember.findUnique({
+        where: {
+            userId_groupId: { userId, groupId },
+        },
+    });
+
+    if (!member || member.role !== "ADMIN") {
+        throw new TRPCError({
+            code: "UNAUTHORIZED",
+            message: "You must be an admin to update this group",
+        });
+    }
+
+    return prisma.group.update({
+        where: { id: groupId },
+        data: {
+            ...(input.name && { name: input.name }),
+            ...(input.description !== undefined && { description: input.description }),
+            ...(input.privacy && { privacy: input.privacy }),
+            ...(input.image !== undefined && { image: input.image }),
+            ...(input.guidelines !== undefined && { guidelines: input.guidelines }),
+        },
+    });
+}