server: WIP tantivy, cache slurps, use shared::compute_color,

server/src/error.rs

@@ -1,6 +1,8 @@
 use std::{convert::Infallible, str::Utf8Error, string::FromUtf8Error};
 
 use mailparse::MailParseError;
+use tantivy::TantivyError;
+use tantivy::query::QueryParserError;
 use thiserror::Error;
 
 use crate::TransformError;
@@ -29,6 +31,10 @@ pub enum ServerError {
     StringError(String),
     #[error("invalid url: {0}")]
     UrlParseError(#[from] url::ParseError),
+    #[error("tantivy error: {0}")]
+    TantivyError(#[from] TantivyError),
+    #[error("tantivy query parse error: {0}")]
+    QueryParseError(#[from] QueryParserError),
     #[error("impossible: {0}")]
     InfaillibleError(#[from] Infallible),
 }