implement downloads

cops-web/src/data/book.rs

@@ -1,6 +1,10 @@
+use std::{collections::HashMap, path::Path};
+
 use calibre_db::data::{book::Book as DbBook, series::Series as DbSeries};
 use serde::Serialize;
 
+use crate::app_state::AppState;
+
 #[derive(Debug, Serialize)]
 pub struct Book {
     pub id: u64,
@@ -9,6 +13,7 @@ pub struct Book {
     pub path: String,
     pub author: String,
     pub series: Option<(String, f64)>,
+    pub formats: HashMap<String, String>,
 }
 
 impl Book {
@@ -16,6 +21,7 @@ impl Book {
         db_book: &DbBook,
         db_series: Option<(DbSeries, f64)>,
         author: &str,
+        formats: HashMap<String, String>,
     ) -> Self {
         Self {
             id: db_book.id,
@@ -24,6 +30,34 @@ impl Book {
             path: db_book.path.clone(),
             author: author.to_string(),
             series: db_series.map(|x| (x.0.name, x.1)),
+            formats,
         }
     }
+
+    fn formats(book: &DbBook, library_path: &Path) -> HashMap<String, String> {
+        let book_path = library_path.join(&book.path);
+        let mut formats = HashMap::new();
+
+        for entry in book_path.read_dir().unwrap().flatten() {
+            if let Some(extension) = entry.path().extension() {
+                let format = match extension.to_string_lossy().to_string().as_str() {
+                    "pdf" => Some("pdf".to_string()),
+                    "epub" => Some("epub".to_string()),
+                    _ => None,
+                };
+                if let Some(format) = format {
+                    formats.insert(format, entry.file_name().to_string_lossy().to_string());
+                }
+            }
+        }
+
+        formats
+    }
+
+    pub fn full_book(book: &DbBook, state: &AppState) -> Option<Book> {
+        let formats = Book::formats(book, &state.config.library_path);
+        let author = state.calibre.book_author(book.id).ok()?;
+        let series = state.calibre.book_series(book.id).ok()?;
+        Some(Book::from_db_book(book, series, &author.name, formats))
+    }
 }

cops-web/src/handlers/cover.rs

@@ -1,23 +1,25 @@
 use std::{fs::File, io::Read, sync::Arc};
 
 use poem::{
+    error::NotFoundError,
     handler,
     web::{headers::ContentType, Data, Path, WithContentType},
     IntoResponse,
 };
 
-use crate::app_state::AppState;
+use crate::{app_state::AppState, handlers::error::SqliteError};
 
 #[handler]
 pub async fn handler(
     id: Path<u64>,
     state: Data<&Arc<AppState>>,
 ) -> Result<WithContentType<Vec<u8>>, poem::Error> {
-    let book = state.calibre.scalar_book(*id).unwrap();
+    let book = state.calibre.scalar_book(*id).map_err(SqliteError)?;
     let cover_path = state.config.library_path.join(book.path).join("cover.jpg");
-    let mut cover = File::open(cover_path).unwrap();
+    let mut cover = File::open(cover_path).map_err(|_| NotFoundError)?;
+
     let mut data = Vec::new();
-    cover.read_to_end(&mut data).unwrap();
+    cover.read_to_end(&mut data).map_err(|_| NotFoundError)?;
 
     Ok(data.with_content_type(ContentType::jpeg().to_string()))
 }

cops-web/src/handlers/download.rs

@@ -0,0 +1,35 @@
+use std::{fs::File, io::Read, sync::Arc};
+
+use poem::{
+    error::NotFoundError,
+    handler,
+    web::{Data, Path, WithContentType, WithHeader},
+    IntoResponse,
+};
+
+use crate::{app_state::AppState, data::book::Book, handlers::error::SqliteError};
+
+#[handler]
+pub async fn handler(
+    Path((id, format)): Path<(u64, String)>,
+    state: Data<&Arc<AppState>>,
+) -> Result<WithHeader<WithContentType<Vec<u8>>>, poem::Error> {
+    let book = state.calibre.scalar_book(id).map_err(SqliteError)?;
+    let book = Book::full_book(&book, &state).ok_or(NotFoundError)?;
+    let format: &str = format.as_str();
+    let file_name = book.formats.get(format).ok_or(NotFoundError)?;
+    let file_path = state.config.library_path.join(book.path).join(file_name);
+    let mut file = File::open(file_path).map_err(|_| NotFoundError)?;
+
+    let mut data = Vec::new();
+    file.read_to_end(&mut data).map_err(|_| NotFoundError)?;
+    let content_type = match format {
+        "pdf" => "application/pdf",
+        "epub" => "application/epub+zip",
+        _ => unreachable!(),
+    };
+
+    Ok(data
+        .with_content_type(content_type)
+        .with_header("Content-Disposition", format!("filename={file_name};")))
+}

cops-web/src/handlers/recents.rs

@@ -16,11 +16,7 @@ pub async fn handler(state: Data<&Arc<AppState>>) -> Result<Html<String>, poem::
     let recent_books = state.calibre.recent_books(50).map_err(SqliteError)?;
     let recent_books = recent_books
         .iter()
-        .filter_map(|x| {
-            let author = state.calibre.book_author(x.id).ok()?;
-            let series = state.calibre.book_series(x.id).ok()?;
-            Some(Book::from_db_book(x, series, &author.name))
-        })
+        .filter_map(|x| Book::full_book(x, &state))
         .collect::<Vec<Book>>();
 
     let mut context = Context::new();

cops-web/src/main.rs

@@ -19,6 +19,7 @@ mod data {
 }
 mod handlers {
     pub mod cover;
+    pub mod download;
     pub mod error;
     pub mod recents;
 }
@@ -44,6 +45,7 @@ async fn main() -> Result<(), std::io::Error> {
     let app = Route::new()
         .at("/", get(handlers::recents::handler))
         .at("/cover/:id", get(handlers::cover::handler))
+        .at("/book/:id/:format", get(handlers::download::handler))
         .nest("/static", EmbeddedFilesEndpoint::<Files>::new())
         .data(app_state);
 

cops-web/src/templates.rs

@@ -5,6 +5,7 @@ pub static TEMPLATES: Lazy<Tera> = Lazy::new(|| {
     let mut tera = Tera::default();
     tera.add_raw_templates(vec![
         ("base", include_str!("../templates/base.html")),
+        ("book_card", include_str!("../templates/book_card.html")),
         ("recents", include_str!("../templates/recents.html")),
     ])
     .expect("failed to parse tera templates");

cops-web/templates/book_card.html

@@ -0,0 +1,25 @@
+ <article class="book-card">
+  <header class="grid-item">
+    <hgroup>
+      <h5>{{ book.title }}</h5>
+      <p>{{ book.author }}</p>
+    </hgroup>
+  </header>
+  <img class="cover" src="/cover/{{ book.id }}" alt="book cover">
+  <footer>
+    <form>
+      <fieldset role="group">
+        <details class="dropdown">
+          <summary role="button" class="outline">
+            Download 
+          </summary>
+          <ul>
+          {% for format, _ in book.formats %}
+            <li><a href="/book/{{ book.id }}/{{ format }}">{{ format }}</a></li>
+          {% endfor %}
+          </ul>
+        </details>
+      </fieldset>
+    </form>
+  </footer>
+</article>

cops-web/templates/recents.html

@@ -2,32 +2,8 @@
 {% block content %}
     <h1>Recent Books</h1>
     <div class="grid-container">
-      {% for book in books %}
-      <article class="book-card">
-        <header class="grid-item">
-          <hgroup>
-            <h5>{{ book.title }}</h5>
-            <!-- {% if book.series %}<p>{{ book.series.0 }} ({{ book.series.1 }})</p>{% endif %} -->
-            <p>{{ book.author }}</p>
-          </hgroup>
-        </header>
-        <img class="cover" src="/cover/{{ book.id }}" alt="book cover">
-        <footer>
-          <form>
-            <fieldset role="group">
-              <details class="dropdown">
-                <summary role="button" class="outline">
-                  Download 
-                </summary>
-                <ul>
-                  <li><a href="#">Epub</a></li>
-                  <li><a href="#">Pdf</a></li>
-                </ul>
-              </details>
-            </fieldset>
-          </form>
-        </footer>
-      </article>
-      {% endfor %}
+    {% for book in books %}
+    {% include "book_card" %}
+    {% endfor %}
     </div>
 {% endblock content %}