rustfs-policy 0.0.3

Policy management for RustFS, providing a framework for defining and enforcing policies across the system.
Documentation 
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// Copyright 2024 RustFS Team
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use serde::{Deserialize, Serialize};
use time::OffsetDateTime;

use super::Policy;

#[derive(Serialize, Deserialize, Default, Clone)]
pub struct PolicyDoc {
    pub version: i64,
    pub policy: Policy,
    pub create_date: Option<OffsetDateTime>,
    pub update_date: Option<OffsetDateTime>,
}

impl PolicyDoc {
    pub fn new(policy: Policy) -> Self {
        Self {
            version: 1,
            policy,
            create_date: Some(OffsetDateTime::now_utc()),
            update_date: Some(OffsetDateTime::now_utc()),
        }
    }

    pub fn update(&mut self, policy: Policy) {
        self.version += 1;
        self.policy = policy;
        self.update_date = Some(OffsetDateTime::now_utc());

        if self.create_date.is_none() {
            self.create_date = self.update_date;
        }
    }

    pub fn default_policy(policy: Policy) -> Self {
        Self {
            version: 1,
            policy,
            create_date: None,
            update_date: None,
        }
    }
}

impl TryFrom<Vec<u8>> for PolicyDoc {
    type Error = serde_json::Error;

    fn try_from(value: Vec<u8>) -> Result<Self, Self::Error> {
        match serde_json::from_slice::<PolicyDoc>(&value) {
            Ok(res) => Ok(res),
            Err(err) => match serde_json::from_slice::<Policy>(&value) {
                Ok(res2) => Ok(Self {
                    policy: res2,
                    ..Default::default()
                }),
                Err(_) => Err(err),
            },
        }
    }
}