Use Env to pass in functions

src/feed/mod.rs

@@ -8,5 +8,10 @@ pub use get::get;
 
 type Feed = atom_syndication::Feed;
 
+pub struct FeedEnv {
+    pub find: FeedFind,
+    pub get: FeedGet,
+}
+
 pub type FeedFind = fn(&str, &str) -> Result<String>;
 pub type FeedGet = fn(&str) -> Result<Feed>;

src/fetch.rs

@@ -3,6 +3,10 @@ use crate::prelude::*;
 use atom_syndication::Link;
 use std::process::Command;
 
+pub struct FetchEnv {
+    pub download: FetchDownload,
+}
+
 pub type FetchDownload = fn(&Link) -> Result<()>;
 
 pub fn download(link: &Link) -> Result<()> {

src/history/mod.rs

@@ -8,5 +8,10 @@ pub use find::find;
 
 type Link = atom_syndication::Link;
 
+pub struct HistoryEnv {
+    pub find: HistoryFind,
+    pub add: HistoryAdd,
+}
+
 pub type HistoryFind = fn(&Link, &str) -> Result<bool>;
 pub type HistoryAdd = fn(&Link, &str) -> Result<()>;

src/lib.rs

@@ -5,30 +5,27 @@ pub mod history;
 pub mod prelude;
 mod subscriptions;
 
-use feed::{FeedFind, FeedGet};
-use fetch::FetchDownload;
-use history::{HistoryAdd, HistoryFind};
+use feed::FeedEnv;
+use fetch::FetchEnv;
+use history::HistoryEnv;
 use prelude::*;
 
-pub fn run(
-    subscriptions: &str,
-    history: &str,
-    site: &str,
-    feed_find: FeedFind,
-    feed_get: FeedGet,
-    history_find: HistoryFind,
-    history_add: HistoryAdd,
-    fetch_download: FetchDownload,
-) -> Result<()> {
+pub struct Env {
+    pub feed: FeedEnv,
+    pub history: HistoryEnv,
+    pub fetch: FetchEnv,
+}
+
+pub fn run(subscriptions: &str, history: &str, site: &str, e: Env) -> Result<()> {
     for channel_name in subscriptions::lines_from(subscriptions)? {
         println!("Channel: {}", channel_name);
-        let feed_url = feed_find(site, &channel_name)?;
-        for entry in feed_get(&feed_url)?.entries() {
+        let feed_url = (e.feed.find)(site, &channel_name)?;
+        for entry in (e.feed.get)(&feed_url)?.entries() {
             if let Some(link) = entry.links().get(0).cloned() {
-                if !history_find(&link, history)? {
+                if !(e.history.find)(&link, history)? {
                     println!("Downloading {}: {}", &channel_name, entry.title().as_str());
-                    fetch_download(&link)?;
-                    history_add(&link, history)?;
+                    (e.fetch.download)(&link)?;
+                    (e.history.add)(&link, history)?;
                 }
             }
         }

src/main.rs

@@ -1,5 +1,7 @@
 use podal::prelude::*;
 
+use podal::{feed::FeedEnv, fetch::FetchEnv, history::HistoryEnv};
+
 fn main() -> Result<()> {
     println!("Podal");
     let subscriptions = "subscriptions.txt";
@@ -10,11 +12,20 @@ fn main() -> Result<()> {
         subscriptions,
         history,
         site,
-        podal::feed::find,
-        podal::feed::get,
-        podal::history::find,
-        podal::history::add,
-        podal::fetch::download,
+        podal::Env {
+            feed: FeedEnv {
+                find: podal::feed::find,
+                get: podal::feed::get,
+            },
+
+            history: HistoryEnv {
+                find: podal::history::find,
+                add: podal::history::add,
+            },
+            fetch: FetchEnv {
+                download: podal::fetch::download,
+            },
+        },
     )?;
 
     println!("Done");