Add an SearcherActor, wrapping Searcher & DbPool

and implement AddDocument message!
This code compiles, but hasn't been put to use yet.

plume-models/src/posts.rs

@@ -24,7 +24,7 @@ use std::collections::HashSet;
 
 pub type LicensedArticle = CustomObject<Licensed, Article>;
 
-#[derive(Queryable, Identifiable, Clone, AsChangeset)]
+#[derive(Debug, Queryable, Identifiable, Clone, AsChangeset)]
 #[changeset_options(treat_none_as_null = "true")]
 pub struct Post {
     pub id: i32,

plume-models/src/search/searcher.rs

@@ -1,10 +1,11 @@
 use crate::{
-    config::SearchTokenizerConfig, instance::Instance, posts::Post, schema::posts,
+    config::SearchTokenizerConfig, db_conn::DbPool, instance::Instance, posts::Post, schema::posts,
     search::query::PlumeQuery, tags::Tag, Connection, Result,
 };
 use chrono::Datelike;
 use diesel::{ExpressionMethods, QueryDsl, RunQueryDsl};
 use itertools::Itertools;
+use riker::actors::*;
 use std::{cmp, fs::create_dir_all, io, path::Path, sync::Mutex};
 use tantivy::{
     collector::TopDocs, directory::MmapDirectory, schema::*, Index, IndexReader, IndexWriter,
@@ -254,3 +255,31 @@ impl Searcher {
         self.writer.lock().unwrap().take();
     }
 }
+
+#[derive(Clone, Debug)]
+pub struct AddDocument(Post);
+
+#[actor(AddDocument)]
+pub struct SearcherActor {
+    searcher: Searcher,
+    db_pool: DbPool,
+}
+
+impl Actor for SearcherActor {
+    // we used the #[actor] attribute so SearcherActorMsg is the Msg type
+    type Msg = SearcherActorMsg;
+
+    fn recv(&mut self, ctx: &Context<Self::Msg>, msg: Self::Msg, sender: Sender) {
+        // Use the respective Receive<T> implementation
+        self.receive(ctx, msg, sender);
+    }
+}
+
+impl Receive<AddDocument> for SearcherActor {
+    type Msg = SearcherActorMsg;
+
+    fn receive(&mut self, _ctx: &Context<Self::Msg>, msg: AddDocument, _sender: Sender) {
+        let conn = self.db_pool.get().unwrap();
+        let _ = self.searcher.add_document(&conn, &msg.0);
+    }
+}