feat: representations of responses for server operations

2 files changed, 79 insertions, 0 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 6955243..d96fd2b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -2,4 +2,5 @@ pub mod chunk;
 pub mod chunkid;
 pub mod chunkmeta;
 pub mod index;
+pub mod server;
 pub mod store;
diff --git a/src/server.rs b/src/server.rs
new file mode 100644
index 0000000..6b8a064
--- /dev/null
+++ b/src/server.rs
@@ -0,0 +1,78 @@
+use crate::chunkid::ChunkId;
+use crate::chunkmeta::ChunkMeta;
+use serde::{Deserialize, Serialize};
+use std::collections::HashMap;
+use std::default::Default;
+
+/// Result of creating a chunk.
+#[derive(Debug, Serialize)]
+pub struct Created {
+    id: ChunkId,
+}
+
+impl Created {
+    pub fn new(id: ChunkId) -> Self {
+        Created { id }
+    }
+
+    pub fn to_json(&self) -> String {
+        serde_json::to_string(&self).unwrap()
+    }
+}
+
+/// Result of retrieving a chunk.
+#[derive(Debug, Serialize)]
+pub struct Fetched {
+    id: ChunkId,
+    meta: ChunkMeta,
+}
+
+impl Fetched {
+    pub fn new(id: ChunkId, meta: ChunkMeta) -> Self {
+        Fetched { id, meta }
+    }
+}
+
+/// Result of a search.
+#[derive(Debug, Default, PartialEq, Deserialize, Serialize)]
+pub struct SearchHits {
+    map: HashMap<String, ChunkMeta>,
+}
+
+impl SearchHits {
+    pub fn insert(&mut self, id: ChunkId, meta: ChunkMeta) {
+        self.map.insert(format!("{}", id), meta);
+    }
+
+    pub fn from_json(s: &str) -> anyhow::Result<Self> {
+        let map = serde_json::from_str(s)?;
+        Ok(SearchHits { map })
+    }
+
+    pub fn to_json(&self) -> String {
+        serde_json::to_string(&self.map).unwrap()
+    }
+}
+
+#[cfg(test)]
+mod test_search_hits {
+    use super::{ChunkMeta, SearchHits};
+
+    #[test]
+    fn no_search_hits() {
+        let hits = SearchHits::default();
+        assert_eq!(hits.to_json(), "{}");
+    }
+
+    #[test]
+    fn one_search_hit() {
+        let id = "abc".parse().unwrap();
+        let meta = ChunkMeta::new("123");
+        let mut hits = SearchHits::default();
+        hits.insert(id, meta);
+        eprintln!("hits: {:?}", hits);
+        let json = hits.to_json();
+        let hits2 = SearchHits::from_json(&json).unwrap();
+        assert_eq!(hits, hits2);
+    }
+}