fetch, create fetch mod and AdapterClient

Creates a fetch mod for fetching remote rss content.

This implementation is barebones and not great since it doesn't pass any
compression or timestamp information.

koucha/src/lib.rs

@@ -3,12 +3,15 @@ use std::error::Error;
 type Result<T> = std::result::Result<T, Box<dyn Error>>;
 
 pub mod db;
+pub mod fetch;
 pub mod score;
 
 #[cfg(test)]
 pub mod test_utils;
 
 pub struct AdapterPool(sqlx::SqlitePool);
+pub struct AdapterClient(reqwest::Client);
+
 pub struct AdapterBuilder {
   database_url: String,
 }
@@ -29,15 +32,18 @@ impl AdapterBuilder {
     let db = sqlx::sqlite::SqlitePoolOptions::new()
       .connect(&self.database_url).await?;
     sqlx::migrate!().run(&db).await?;
+    let client = reqwest::Client::new();
 
-    Ok(Adapter { db: AdapterPool(db) })
+    Ok(Adapter { db: AdapterPool(db), client: AdapterClient(client) })
   }
 }
 
 pub struct Adapter {
   db: AdapterPool,
+  client: AdapterClient,
 }
 
 impl Adapter {
   pub fn get_pool(&self) -> &AdapterPool { &self.db }
+  pub fn get_client(&self) -> &AdapterClient { &self.client }
 }