106 lines
2.9 KiB
Rust
106 lines
2.9 KiB
Rust
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use bitflags::bitflags;
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use serde::{
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Deserialize, Deserializer, Serialize,
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de::{Error as DeError, Visitor},
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};
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bitflags! {
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/// Fine-grained journal permissions built using bitwise operations.
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#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
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pub struct JournalPermission: u32 {
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const DEFAULT = 1 << 0;
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const ADMINISTRATOR = 1 << 1;
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const MEMBER = 1 << 2;
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const _ = !0;
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}
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}
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impl Serialize for JournalPermission {
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fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
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where
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S: serde::Serializer,
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{
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serializer.serialize_u32(self.bits())
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}
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}
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struct JournalPermissionVisitor;
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impl<'de> Visitor<'de> for JournalPermissionVisitor {
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type Value = JournalPermission;
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fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
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formatter.write_str("u32")
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}
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fn visit_u32<E>(self, value: u32) -> Result<Self::Value, E>
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where
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E: DeError,
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{
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if let Some(permission) = JournalPermission::from_bits(value) {
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Ok(permission)
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} else {
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Ok(JournalPermission::from_bits_retain(value))
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}
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}
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fn visit_i32<E>(self, value: i32) -> Result<Self::Value, E>
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where
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E: DeError,
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{
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if let Some(permission) = JournalPermission::from_bits(value as u32) {
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Ok(permission)
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} else {
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Ok(JournalPermission::from_bits_retain(value as u32))
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}
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}
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fn visit_u64<E>(self, value: u64) -> Result<Self::Value, E>
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where
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E: DeError,
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{
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if let Some(permission) = JournalPermission::from_bits(value as u32) {
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Ok(permission)
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} else {
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Ok(JournalPermission::from_bits_retain(value as u32))
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}
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}
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}
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impl<'de> Deserialize<'de> for JournalPermission {
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fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
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where
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D: Deserializer<'de>,
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{
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deserializer.deserialize_any(JournalPermissionVisitor)
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}
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}
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impl JournalPermission {
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/// Join two [`JournalPermission`]s into a single `u32`.
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pub fn join(lhs: JournalPermission, rhs: JournalPermission) -> JournalPermission {
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lhs | rhs
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}
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/// Check if the given `input` contains the given [`JournalPermission`].
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pub fn check(self, permission: JournalPermission) -> bool {
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if (self & JournalPermission::ADMINISTRATOR) == JournalPermission::ADMINISTRATOR {
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// has administrator permission, meaning everything else is automatically true
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return true;
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}
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(self & permission) == permission
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}
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/// Check if the given [`JournalPermission`] qualifies as "Member" status.
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pub fn check_helper(self) -> bool {
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self.check(JournalPermission::MEMBER)
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}
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}
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impl Default for JournalPermission {
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fn default() -> Self {
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Self::DEFAULT
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}
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}
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