remove now unused serde_filter module
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
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9a7431e2e0
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729bd1fd16
@ -16,7 +16,6 @@ pub mod apt;
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pub mod config;
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pub mod disks;
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pub mod serde_filter;
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pub mod statistics;
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pub mod subscription;
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pub mod systemd;
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@ -1,97 +0,0 @@
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use std::marker::PhantomData;
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use serde::Deserialize;
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/// Helper to filter data while deserializing it.
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///
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/// An example use case is filtering out expired registration challenges at load time of our TFA
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/// config:
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///
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/// ```
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/// # use proxmox_backup::tools::serde_filter::FilteredVecVisitor;
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/// # use serde::{Deserialize, Deserializer, Serialize};
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/// # const CHALLENGE_TIMEOUT: i64 = 2 * 60;
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/// #[derive(Deserialize)]
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/// struct Challenge {
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/// /// Expiration time as unix epoch.
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/// expires: i64,
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///
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/// // ...other entries...
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/// }
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///
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/// #[derive(Default, Deserialize)]
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/// #[serde(deny_unknown_fields)]
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/// #[serde(rename_all = "kebab-case")]
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/// pub struct TfaUserData {
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/// // ...other entries...
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///
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/// #[serde(skip_serializing_if = "Vec::is_empty", default)]
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/// #[serde(deserialize_with = "filter_expired_registrations")]
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/// registrations: Vec<Challenge>,
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/// }
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///
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/// fn filter_expired_registrations<'de, D>(deserializer: D) -> Result<Vec<Challenge>, D::Error>
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/// where
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/// D: Deserializer<'de>,
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/// {
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/// let expire_before = proxmox_time::epoch_i64() - CHALLENGE_TIMEOUT;
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///
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/// Ok(deserializer.deserialize_seq(
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/// FilteredVecVisitor::new(
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/// "a u2f registration challenge entry",
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/// move |c: &Challenge| c.expires < expire_before,
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/// )
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/// )?)
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/// }
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/// ```
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pub struct FilteredVecVisitor<F, T>
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where
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F: Fn(&T) -> bool
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{
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filter: F,
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expecting: &'static str,
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_ty: PhantomData<T>,
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}
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impl<F, T> FilteredVecVisitor<F, T>
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where
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F: Fn(&T) -> bool,
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{
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pub fn new(expecting: &'static str, filter: F) -> Self {
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Self {
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filter,
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expecting,
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_ty: PhantomData,
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}
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}
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}
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impl<'de, F, T> serde::de::Visitor<'de> for FilteredVecVisitor<F, T>
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where
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F: Fn(&T) -> bool,
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T: Deserialize<'de>,
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{
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type Value = Vec<T>;
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fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
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formatter.write_str(self.expecting)
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}
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fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error>
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where
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A: serde::de::SeqAccess<'de>,
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{
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let mut out = match seq.size_hint() {
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Some(hint) => Vec::with_capacity(hint),
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None => Vec::new(),
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};
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while let Some(entry) = seq.next_element::<T>()? {
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if (self.filter)(&entry) {
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out.push(entry);
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}
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}
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Ok(out)
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}
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}
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