Added posts creation and posts detail

solution/pulse/api/posts/permissions.py

@@ -0,0 +1,17 @@
+from rest_framework import status
+from rest_framework.permissions import BasePermission
+
+
+class CanAccessPost(BasePermission):
+    message = "You do not have permission to access this post."
+    status_code = status.HTTP_404_NOT_FOUND
+
+    def has_object_permission(self, request, view, obj):
+        if (
+            obj.author.isPublic
+            or obj.author.check_for_friendship(request.user)
+            or obj.author == request.user
+        ):
+            return True
+
+        return False