diff options
-rw-r--r-- | src/error.rs | 8 | ||||
-rw-r--r-- | src/genlist.rs | 43 |
2 files changed, 51 insertions, 0 deletions
diff --git a/src/error.rs b/src/error.rs new file mode 100644 index 0000000..1e750e5 --- /dev/null +++ b/src/error.rs @@ -0,0 +1,8 @@ +use thiserror::Error; + +/// Define all the kinds of errors any part of this crate can return. +#[derive(Debug, Error)] +pub enum ObnamError { + #[error("Can't find backup '{0}'")] + UnknownGeneration(String), +} diff --git a/src/genlist.rs b/src/genlist.rs new file mode 100644 index 0000000..10c614e --- /dev/null +++ b/src/genlist.rs @@ -0,0 +1,43 @@ +use crate::chunkid::ChunkId; +use crate::generation::FinishedGeneration; + +pub struct GenerationList { + list: Vec<FinishedGeneration>, +} + +impl GenerationList { + pub fn new(gens: Vec<FinishedGeneration>) -> Self { + let mut list = gens.clone(); + list.sort_by_cached_key(|gen| gen.ended().to_string()); + Self { list } + } + + pub fn iter(&self) -> impl Iterator<Item = &FinishedGeneration> { + self.list.iter() + } + + pub fn resolve(&self, genref: &str) -> Option<String> { + let gen = if self.list.is_empty() { + None + } else if genref == "latest" { + let i = self.list.len() - 1; + Some(self.list[i].clone()) + } else { + let genref: ChunkId = genref.parse().unwrap(); + let hits: Vec<FinishedGeneration> = self + .iter() + .filter(|gen| gen.id() == genref) + .map(|gen| gen.clone()) + .collect(); + if hits.len() == 1 { + Some(hits[0].clone()) + } else { + None + } + }; + match gen { + None => None, + Some(gen) => Some(gen.id().to_string()), + } + } +} |