Define a new Diesel Model for PodcastCover querries.

Define new Diesel Model and impl From<Podcast> trait,
Change the signature of downloader::cache_image function,
Change and merge hammond-gtk::utils::get_pixbuf_from_path functions.

hammond-data/src/dbqueries.rs

@@ -2,7 +2,7 @@
 
 use diesel::prelude::*;
 use diesel;
-use models::queryables::{Episode, EpisodeWidgetQuery, Podcast, Source};
+use models::queryables::{Episode, EpisodeWidgetQuery, Podcast, PodcastCoverQuery, Source};
 use chrono::prelude::*;
 use errors::*;
 
@@ -114,6 +114,17 @@ pub fn get_podcast_from_id(pid: i32) -> Result<Podcast> {
     Ok(podcast.filter(id.eq(pid)).get_result::<Podcast>(&*con)?)
 }
 
+pub fn get_podcast_cover_from_id(pid: i32) -> Result<PodcastCoverQuery> {
+    use schema::podcast::dsl::*;
+
+    let db = connection();
+    let con = db.get()?;
+    Ok(podcast
+        .select((id, title, image_uri))
+        .filter(id.eq(pid))
+        .get_result::<PodcastCoverQuery>(&*con)?)
+}
+
 pub fn get_pd_episodes(parent: &Podcast) -> Result<Vec<Episode>> {
     use schema::episode::dsl::*;
 

hammond-data/src/lib.rs

@@ -61,7 +61,7 @@ pub(crate) mod models;
 mod parser;
 mod schema;
 
-pub use models::queryables::{Episode, EpisodeWidgetQuery, Podcast, Source};
+pub use models::queryables::{Episode, EpisodeWidgetQuery, Podcast, PodcastCoverQuery, Source};
 
 /// [XDG Base Direcotory](https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html) Paths.
 #[allow(missing_debug_implementations)]

hammond-data/src/models/queryables.rs

@@ -427,6 +427,39 @@ impl Podcast {
     }
 }
 
+#[derive(Queryable, Debug, Clone)]
+/// Diesel Model of the podcast cover query.
+/// Used for fetching information about a Podcast's cover.
+pub struct PodcastCoverQuery {
+    id: i32,
+    title: String,
+    image_uri: Option<String>,
+}
+
+impl From<Podcast> for PodcastCoverQuery {
+    fn from(p: Podcast) -> PodcastCoverQuery {
+        PodcastCoverQuery {
+            id: *p.id(),
+            title: p.title,
+            image_uri: p.image_uri,
+        }
+    }
+}
+
+impl PodcastCoverQuery {
+    /// Get the Feed `title`.
+    pub fn title(&self) -> &str {
+        &self.title
+    }
+
+    /// Get the `image_uri`.
+    ///
+    /// Represents the uri(url usually) that the Feed cover image is located at.
+    pub fn image_uri(&self) -> Option<&str> {
+        self.image_uri.as_ref().map(|s| s.as_str())
+    }
+}
+
 #[derive(Queryable, Identifiable, AsChangeset, PartialEq)]
 #[table_name = "source"]
 #[changeset_options(treat_none_as_null = "true")]

hammond-downloader/src/downloader.rs

@@ -8,7 +8,7 @@ use std::io::{BufWriter, Read, Write};
 use std::path::Path;
 
 use errors::*;
-use hammond_data::{EpisodeWidgetQuery, Podcast};
+use hammond_data::{EpisodeWidgetQuery, PodcastCoverQuery};
 use hammond_data::xdg_dirs::{DL_DIR, HAMMOND_CACHE};
 
 // TODO: Replace path that are of type &str with std::path.
@@ -131,7 +131,7 @@ pub fn get_episode(ep: &mut EpisodeWidgetQuery, download_folder: &str) -> Result
     }
 }
 
-pub fn cache_image(pd: &Podcast) -> Option<String> {
+pub fn cache_image(pd: &PodcastCoverQuery) -> Option<String> {
     let url = pd.image_uri()?.to_owned();
     if url == "" {
         return None;
@@ -207,7 +207,7 @@ mod tests {
         index(vec![feed]);
 
         // Get the Podcast
-        let pd = dbqueries::get_podcast_from_source_id(sid).unwrap();
+        let pd = dbqueries::get_podcast_from_source_id(sid).unwrap().into();
 
         let img_path = cache_image(&pd);
         let foo_ = format!(

hammond-gtk/src/utils.rs

@@ -2,7 +2,7 @@ use glib;
 use gdk_pixbuf::Pixbuf;
 
 use hammond_data::feed;
-use hammond_data::{Podcast, Source};
+use hammond_data::{PodcastCoverQuery, Source};
 use hammond_downloader::downloader;
 
 use std::thread;
@@ -60,21 +60,9 @@ fn refresh_podcasts_view() -> glib::Continue {
 }
 
 // FIXME: use something that would just scale?
-// TODO: make a diesel model with only title, local_uri
+pub fn get_pixbuf_from_path(pd: &PodcastCoverQuery, size: u32) -> Option<Pixbuf> {
-
-pub fn get_pixbuf_from_path(pd: &Podcast) -> Option<Pixbuf> {
     let img_path = downloader::cache_image(pd)?;
-    Pixbuf::new_from_file_at_scale(&img_path, 256, 256, true).ok()
+    Pixbuf::new_from_file_at_scale(&img_path, size as i32, size as i32, true).ok()
-}
-
-pub fn get_pixbuf_from_path_128(pd: &Podcast) -> Option<Pixbuf> {
-    let img_path = downloader::cache_image(pd)?;
-    Pixbuf::new_from_file_at_scale(&img_path, 128, 128, true).ok()
-}
-
-pub fn get_pixbuf_from_path_64(pd: &Podcast) -> Option<Pixbuf> {
-    let img_path = downloader::cache_image(pd)?;
-    Pixbuf::new_from_file_at_scale(&img_path, 64, 64, true).ok()
 }
 
 #[cfg(test)]
@@ -100,7 +88,7 @@ mod tests {
 
         // Get the Podcast
         let pd = dbqueries::get_podcast_from_source_id(sid).unwrap();
-        let pxbuf = get_pixbuf_from_path(&pd);
+        let pxbuf = get_pixbuf_from_path(&pd.into(), 256);
         assert!(pxbuf.is_some());
     }
 }

hammond-gtk/src/views/episodes.rs

@@ -6,7 +6,7 @@ use hammond_data::dbqueries;
 use hammond_data::EpisodeWidgetQuery;
 
 use widgets::episode::EpisodeWidget;
-use utils::get_pixbuf_from_path_64;
+use utils::get_pixbuf_from_path;
 
 use std::rc::Rc;
 
@@ -216,8 +216,8 @@ impl EpisodesViewWidget {
         let image: gtk::Image = builder.get_object("cover").unwrap();
 
         // FIXME:
-        if let Ok(pd) = dbqueries::get_podcast_from_id(episode.podcast_id()) {
+        if let Ok(pd) = dbqueries::get_podcast_cover_from_id(episode.podcast_id()) {
-            let img = get_pixbuf_from_path_64(&pd);
+            let img = get_pixbuf_from_path(&pd, 64);
             if let Some(i) = img {
                 image.set_from_pixbuf(&i);
             }

hammond-gtk/src/views/shows.rs

@@ -111,7 +111,7 @@ impl ShowsChild {
     fn init(&self, pd: &Podcast) {
         self.container.set_tooltip_text(pd.title());
 
-        let cover = get_pixbuf_from_path(pd);
+        let cover = get_pixbuf_from_path(&pd.clone().into(), 256);
         if let Some(img) = cover {
             self.cover.set_from_pixbuf(&img);
         };

hammond-gtk/src/widgets/show.rs

@@ -10,7 +10,7 @@ use hammond_data::utils::replace_extra_spaces;
 use hammond_downloader::downloader;
 
 use widgets::episode::episodes_listbox;
-use utils::get_pixbuf_from_path_128;
+use utils::get_pixbuf_from_path;
 use content::ShowStack;
 use headerbar::Header;
 
@@ -77,7 +77,7 @@ impl ShowWidget {
         let desc = dissolve::strip_html_tags(pd.description()).join(" ");
         self.description.set_text(&replace_extra_spaces(&desc));
 
-        let img = get_pixbuf_from_path_128(pd);
+        let img = get_pixbuf_from_path(&pd.clone().into(), 128);
         if let Some(i) = img {
             self.cover.set_from_pixbuf(&i);
         }