New: Included function to get Id of ParentProject

(coscine/issues#628)

src/Project/Controllers/SubProjectController.cs

@@ -2,6 +2,7 @@
 using Coscine.ApiCommons;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
+using Newtonsoft.Json.Linq;
 using System;
 using System.Linq;
 
@@ -47,5 +48,31 @@ namespace Coscine.Api.Project.Controllers
                 return Unauthorized("User is not allowed to create a subproject for the given project id!");
             }
         }
+
+        [HttpGet("[controller]/{childId}/accessibleParent")]
+        public IActionResult GetAccessibleParent(string childId)
+        {
+            var childGuid = new Guid(childId);
+            var projectModel = new ProjectModel();
+            var projectRoleModel = new ProjectRoleModel();
+            var user = _authenticator.GetUser();
+            string[] allowedRoles = { UserRoles.Owner, UserRoles.Member };
+            allowedRoles = allowedRoles.Select(x => x.ToLower().Trim()).ToArray();
+            if (projectModel.HasAccess(user, projectModel.GetById(childGuid), allowedRoles))
+            {
+                var subProjects = _subProjectModel.GetAllWhere((subProjectM) => (subProjectM.SubProjectId == childGuid)).ToArray();
+                var json = new JObject();
+                json["id"] = "00000000-0000-0000-0000-000000000000";
+                if (subProjects.Count() == 1 && projectModel.HasAccess(user, projectModel.GetById(subProjects[0].ProjectId), allowedRoles))
+                {
+                    json["id"] = subProjects[0].ProjectId;
+                }
+                return Json(json);
+            }
+            else
+            {
+                return Unauthorized("User is not allowed to create a subproject for the given project id!");
+            }
+        }
     }
 }