Mohammed Naser | 62c4dd9 | 2025-02-16 13:18:14 -0500 | [diff] [blame] | 1 | use serde::Deserialize; |
| 2 | use std::collections::HashMap; |
| 3 | use std::{fs::File, path::PathBuf}; |
| 4 | use thiserror::Error; |
| 5 | use log::{error, info}; |
| 6 | |
| 7 | #[derive(Deserialize)] |
| 8 | pub struct NetworkConfig { |
| 9 | #[serde(flatten)] |
| 10 | pub bridges: HashMap<String, Option<String>>, |
| 11 | } |
| 12 | |
| 13 | #[derive(Debug, Error)] |
| 14 | pub enum NetworkConfigError { |
| 15 | #[error("Failed to open file: {0}")] |
| 16 | OpenFile(#[from] std::io::Error), |
| 17 | |
| 18 | #[error("Failed to parse JSON: {0}")] |
| 19 | ParseJson(#[from] serde_json::Error), |
| 20 | } |
| 21 | |
| 22 | impl NetworkConfig { |
| 23 | pub fn from_path(path: &PathBuf) -> Result<Self, NetworkConfigError> { |
| 24 | let file = File::open(path)?; |
| 25 | NetworkConfig::from_file(file) |
| 26 | } |
| 27 | |
| 28 | pub fn from_file(file: File) -> Result<Self, NetworkConfigError> { |
| 29 | let config: NetworkConfig = serde_json::from_reader(file)?; |
| 30 | Ok(config) |
| 31 | } |
| 32 | |
| 33 | pub fn bridges_with_interfaces_iter(&self) -> impl Iterator<Item = (&String, &String)> { |
| 34 | self.bridges.iter().filter_map(|(k, v)| { |
| 35 | if let Some(v) = v { |
| 36 | Some((k, v)) |
| 37 | } else { |
| 38 | info!(bridge = k.as_str(); "Bridge has no interface, skipping."); |
| 39 | |
| 40 | None |
| 41 | } |
| 42 | }) |
| 43 | } |
| 44 | |
| 45 | #[allow(dead_code)] |
| 46 | pub fn from_string(json: &str) -> Result<Self, NetworkConfigError> { |
| 47 | let config: NetworkConfig = serde_json::from_str(json)?; |
| 48 | Ok(config) |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | #[cfg(test)] |
| 53 | mod tests { |
| 54 | use super::*; |
| 55 | |
| 56 | #[test] |
| 57 | fn test_null_interface() { |
| 58 | let config = NetworkConfig::from_string("{\"br-ex\": null}").unwrap(); |
| 59 | |
| 60 | assert_eq!(config.bridges.len(), 1); |
| 61 | assert_eq!(config.bridges.get("br-ex"), Some(&None)); |
| 62 | } |
| 63 | |
| 64 | #[test] |
| 65 | fn test_bridges_with_interfaces_iter_with_null_interface() { |
| 66 | let config = NetworkConfig::from_string("{\"br-ex\": null}").unwrap(); |
| 67 | |
| 68 | let mut iter = config.bridges_with_interfaces_iter(); |
| 69 | assert_eq!(iter.next(), None); |
| 70 | } |
| 71 | |
| 72 | #[test] |
| 73 | fn test_bridges_with_interfaces_iter_with_interface() { |
| 74 | let config = NetworkConfig::from_string("{\"br-ex\": \"bond0\"}").unwrap(); |
| 75 | |
| 76 | let mut iter = config.bridges_with_interfaces_iter(); |
| 77 | assert_eq!( |
| 78 | iter.next(), |
| 79 | Some((&"br-ex".to_string(), &"bond0".to_string())) |
| 80 | ); |
| 81 | } |
| 82 | } |