Refactoring to slide_model and service_item getting the data from db

This is kinda a broken commit. There isn't any order to the adding of
the slide anymore. So it'll need to find a way of keeping track of
where all the current slides are and then insert the new ones in the
correct order while moving the others around as well.

src/rust/presentation_model.rs

@@ -197,9 +197,9 @@ use self::presentation_model::{
 pub struct Presentation {
     id: i32,
     title: String,
-    html: bool,
-    path: String,
-    page_count: i32,
+    pub html: bool,
+    pub path: String,
+    pub page_count: i32,
 }
 
 #[derive(Debug)]
@@ -233,10 +233,22 @@ impl Default for PresentationModelRust {
     }
 }
 
-impl PresentationModelRust {
-    pub fn get_presentation(index: i32) -> Presentation {
-        todo!()
-    }
+pub fn get_presentation(index: i32) -> color_eyre::Result<Presentation> {
+    let rt = tokio::runtime::Runtime::new().unwrap();
+    let mut db = {
+        let mut data = dirs::data_local_dir().unwrap();
+        data.push("lumina");
+        data.push("library-db.sqlite3");
+        let mut db_url = String::from("sqlite://");
+        db_url.push_str(data.to_str().unwrap());
+        rt.block_on(async {
+            SqliteConnection::connect(&db_url).await.expect("problems")
+        })
+    };
+    rt.block_on(async {
+        let result = query_as!(Presentation, r#"SELECT id as "id: i32", title as "title!", filePath as "path!", html as "html!", pageCount as "page_count!: i32" from presentations where id = ?"#, index).fetch_one(&mut db).await?;
+        Ok(result)
+    })
 }
 
 impl presentation_model::PresentationModel {