New perm concept, reference, and adding routes.

src/database/permissions/mod.rs

@@ -0,0 +1,32 @@
+use crate::database::entities::User;
+use num_enum::TryFromPrimitive;
+use std::ops;
+
+#[derive(Debug, PartialEq, Eq, TryFromPrimitive, Copy, Clone)]
+#[repr(u32)]
+pub enum UserPermission {
+    Access = 1,
+    SendMessage = 2,
+    Invite = 4
+}
+
+bitfield! {
+    pub struct UserPermissions(MSB0 [u32]);
+    u32;
+    pub get_access, _: 31;
+    pub get_send_message, _: 30;
+    pub get_invite, _: 29;
+}
+
+impl_op_ex!(+ |a: &UserPermission, b: &UserPermission| -> u32 { *a + *b });
+impl_op_ex!(+ |a: &u32, b: &UserPermission| -> u32 { *a + *b });
+
+pub async fn temp_calc_perm(_user: &User, _target: &User) -> UserPermissions<[u32; 1]> {
+    // if friends; Access + Message + Invite
+    // if mutually know each other:
+    //    and has DMs from users enabled -> Access + Message
+    //    otherwise -> Access
+    // otherwise; None
+
+    UserPermissions([UserPermission::Access + UserPermission::SendMessage + UserPermission::Invite])
+}