From cf373c9be354d54c0c7420e87f48cc9cfd4d682c Mon Sep 17 00:00:00 2001
From: sBubshait <s.bobshit@gmail.com>
Date: Tue, 22 Jul 2025 09:18:06 +0300
Subject: [PATCH] feat: create /available endpoint for invitations to get all
 available invitations

---
 .../wesal/wesal/controller/InvitationController.java | 12 ++++++++++++
 .../wesal/wesal/repository/InvitationRepository.java |  6 ++++++
 .../wesal/wesal/service/InvitationService.java       |  9 +++++++++
 3 files changed, 27 insertions(+)

diff --git a/backend/src/main/java/online/wesal/wesal/controller/InvitationController.java b/backend/src/main/java/online/wesal/wesal/controller/InvitationController.java
index 854fecc..75f5337 100644
--- a/backend/src/main/java/online/wesal/wesal/controller/InvitationController.java
+++ b/backend/src/main/java/online/wesal/wesal/controller/InvitationController.java
@@ -10,6 +10,7 @@ import online.wesal.wesal.service.InvitationService;
 import org.springframework.validation.BindingResult;
 import org.springframework.validation.FieldError;
 
+import java.util.List;
 import java.util.stream.Collectors;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.ResponseEntity;
@@ -78,4 +79,15 @@ public class InvitationController {
             return ResponseEntity.status(500).body(ApiResponse.error("Something went wrong.. We're sorry but try again later"));
         }
     }
+    
+    @GetMapping("/available")
+    @Operation(summary = "Get available invitations", description = "Get all invitations with available space")
+    public ResponseEntity<ApiResponse<List<InvitationResponse>>> getAvailableInvitations() {
+        try {
+            List<InvitationResponse> invitations = invitationService.getAvailableInvitations();
+            return ResponseEntity.ok(ApiResponse.success(invitations));
+        } catch (Exception e) {
+            return ResponseEntity.status(500).body(ApiResponse.error("Something went wrong.. We're sorry but try again later"));
+        }
+    }
 }
\ No newline at end of file
diff --git a/backend/src/main/java/online/wesal/wesal/repository/InvitationRepository.java b/backend/src/main/java/online/wesal/wesal/repository/InvitationRepository.java
index 2ea65c8..802354e 100644
--- a/backend/src/main/java/online/wesal/wesal/repository/InvitationRepository.java
+++ b/backend/src/main/java/online/wesal/wesal/repository/InvitationRepository.java
@@ -2,8 +2,14 @@ package online.wesal.wesal.repository;
 
 import online.wesal.wesal.entity.Invitation;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
 import org.springframework.stereotype.Repository;
 
+import java.util.List;
+
 @Repository
 public interface InvitationRepository extends JpaRepository<Invitation, Long> {
+    
+    @Query("SELECT i FROM Invitation i WHERE i.currentAttendees < i.maxParticipants ORDER BY i.id ASC")
+    List<Invitation> findAvailableInvitationsOrderByCreationDate();
 }
\ No newline at end of file
diff --git a/backend/src/main/java/online/wesal/wesal/service/InvitationService.java b/backend/src/main/java/online/wesal/wesal/service/InvitationService.java
index 1195d89..9ec3300 100644
--- a/backend/src/main/java/online/wesal/wesal/service/InvitationService.java
+++ b/backend/src/main/java/online/wesal/wesal/service/InvitationService.java
@@ -12,7 +12,9 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
+import java.util.List;
 import java.util.Optional;
+import java.util.stream.Collectors;
 
 @Service
 public class InvitationService {
@@ -54,6 +56,13 @@ public class InvitationService {
             .map(this::mapToResponse);
     }
     
+    public List<InvitationResponse> getAvailableInvitations() {
+        return invitationRepository.findAvailableInvitationsOrderByCreationDate()
+            .stream()
+            .map(this::mapToResponse)
+            .collect(Collectors.toList());
+    }
+    
     private InvitationResponse mapToResponse(Invitation invitation) {
         InvitationResponse response = new InvitationResponse();
         response.setId(invitation.getId());