Cache works, but needs a lot more work.

src/probe/hitta.rs

@@ -1,19 +1,28 @@
 use scraper::{Html, Selector};
 
+use crate::context::Context;
 use crate::probe::Probe;
 
 // https://www.hitta.se/vem-ringde/{}
 pub struct Hitta;
 
 impl Probe for Hitta {
-    fn search(&mut self, number: &str) {
-        let body = reqwest::get(&format!("https://www.hitta.se/vem-ringde/{}", number))
-            .unwrap()
-            .text()
-            .unwrap();
+    fn search(&mut self, ctx: &mut Context, number: &str) {
+        let body = if let Some(cache) = ctx.cache_get("hitta", &number) {
+            String::from_utf8(cache.data)
+                .unwrap()
+        } else {
+            reqwest::get(&format!("https://www.hitta.se/vem-ringde/{}", number))
+                .unwrap()
+                .text()
+                .unwrap()
+        };
+
+        ctx.cache_set("hitta", &number, body.as_bytes()).expect("wut?! why not?!");
 
         let document = Html::parse_document(&body);
 
+        // Header.
         let selector = Selector::parse(r#"div[class^="Header__WhoCalledHeader"] > h1"#).unwrap();
 
         print!("Hitta.se:");