Servers: Core objects required. Includes creation. Bump version to 0.5.0.

src/database/permissions/server.rs

@@ -0,0 +1,42 @@
+use crate::database::*;
+use crate::util::result::Result;
+
+use super::PermissionCalculator;
+
+use num_enum::TryFromPrimitive;
+use std::ops;
+
+#[derive(Debug, PartialEq, Eq, TryFromPrimitive, Copy, Clone)]
+#[repr(u32)]
+pub enum ServerPermission {
+    View = 1,
+}
+
+impl_op_ex!(+ |a: &ServerPermission, b: &ServerPermission| -> u32 { *a as u32 | *b as u32 });
+impl_op_ex_commutative!(+ |a: &u32, b: &ServerPermission| -> u32 { *a | *b as u32 });
+
+bitfield! {
+    pub struct ServerPermissions(MSB0 [u32]);
+    u32;
+    pub get_view, _: 31;
+}
+
+impl<'a> PermissionCalculator<'a> {
+    pub async fn calculate_server(self) -> Result<u32> {
+        let server = if let Some(server) = self.server {
+            server
+        } else {
+            unreachable!()
+        };
+
+        if &self.perspective.id == server.owner {
+            Ok(u32::MAX)
+        } else {
+            Ok(ServerPermission::View as u32)
+        }
+    }
+
+    pub async fn for_server(self) -> Result<ChannelPermissions<[u32; 1]>> {
+        Ok(ServerPermissions([self.calculate_server().await?]))
+    }
+}