[pve-devel] [PATCH proxmox-ve-rs 08/21] common: add allowlist

[Stefan Hanreich <s.hanreich@proxmox.com>]

Signed-off-by: Stefan Hanreich <s.hanreich@proxmox.com>
---
 proxmox-ve-config/src/common/mod.rs | 30 +++++++++++++++++++++++++++++
 proxmox-ve-config/src/lib.rs        |  1 +
 2 files changed, 31 insertions(+)
 create mode 100644 proxmox-ve-config/src/common/mod.rs

diff --git a/proxmox-ve-config/src/common/mod.rs b/proxmox-ve-config/src/common/mod.rs
new file mode 100644
index 0000000..9318cff
--- /dev/null
+++ b/proxmox-ve-config/src/common/mod.rs
@@ -0,0 +1,30 @@
+use core::hash::Hash;
+use std::cmp::Eq;
+use std::collections::HashSet;
+
+#[derive(Clone, Debug, Default)]
+pub struct Allowlist<T>(HashSet<T>);
+
+impl<T: Hash + Eq> FromIterator<T> for Allowlist<T> {
+    fn from_iter<A>(iter: A) -> Self
+    where
+        A: IntoIterator<Item = T>,
+    {
+        Allowlist(HashSet::from_iter(iter))
+    }
+}
+
+/// returns true if [`value`] is in the allowlist or if allowlist does not exist
+impl<T: Hash + Eq> Allowlist<T> {
+    pub fn is_allowed(&self, value: &T) -> bool {
+        self.0.contains(value)
+    }
+}
+
+impl<T: Hash + Eq> Allowlist<T> {
+    pub fn new<I>(iter: I) -> Self
+    where I: IntoIterator<Item = T>{
+        Self::from_iter(iter)
+    }
+}
+
diff --git a/proxmox-ve-config/src/lib.rs b/proxmox-ve-config/src/lib.rs
index 856b14f..1b6feae 100644
--- a/proxmox-ve-config/src/lib.rs
+++ b/proxmox-ve-config/src/lib.rs
@@ -1,3 +1,4 @@
+pub mod common;
 pub mod firewall;
 pub mod guest;
 pub mod host;
-- 
2.39.2


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