h-gtk: Wire the import_shows button on the hamburger menu to the the opml import.

hammond-data/src/opml.rs

@@ -7,7 +7,9 @@ use models::Source;
 use xml::reader;
 
 use std::collections::HashSet;
+use std::fs;
 use std::io::Read;
+use std::path::Path;
 
 // use std::fs::{File, OpenOptions};
 // use std::io::BufReader;
@@ -25,15 +27,35 @@ pub struct Opml {
 }
 
 /// Import feed url's from a `R` into the `Source` table.
-pub fn opml_import<R: Read>(reader: R) -> Result<Vec<Result<Source, DataError>>, reader::Error> {
+// TODO: Write test
+pub fn import_to_db<R: Read>(reader: R) -> Result<Vec<Source>, reader::Error> {
     let feeds = extract_sources(reader)?
         .iter()
         .map(|opml| Source::from_url(&opml.url))
+        .filter_map(|s| {
+            if let Err(ref err) = s {
+                let txt = "If you think this might be a bug please consider filling a report over \
+                           at https://gitlab.gnome.org/World/hammond/issues/new";
+
+                error!("Failed to import a Show: {}", err);
+                error!("{}", txt);
+            }
+
+            s.ok()
+        })
         .collect();
 
     Ok(feeds)
 }
 
+/// Open a File from `P`, try to parse the OPML then insert the Feeds in the database and
+/// return the new `Source`s
+// TODO: Write test
+pub fn import_from_file<P: AsRef<Path>>(path: P) -> Result<Vec<Source>, DataError> {
+    let content = fs::read_to_string(path)?;
+    import_to_db(content.as_bytes()).map_err(From::from)
+}
+
 /// Extracts the `outline` elemnts from a reader `R` and returns a `HashSet` of `Opml` structs.
 pub fn extract_sources<R: Read>(reader: R) -> Result<HashSet<Opml>, reader::Error> {
     let mut list = HashSet::new();

hammond-gtk/resources/gtk/headerbar.ui

@@ -323,9 +323,8 @@ Tobias Bernard
         <child>
           <object class="GtkModelButton" id="import">
             <property name="visible">True</property>
-            <property name="sensitive">False</property>
             <property name="can_focus">True</property>
-            <property name="receives_default">False</property>
+            <property name="receives_default">True</property>
             <property name="text" translatable="yes">Import Shows</property>
           </object>
           <packing>

hammond-gtk/src/headerbar.rs

@@ -4,16 +4,16 @@ use gtk::prelude::*;
 
 use failure::Error;
 use failure::ResultExt;
+use rayon;
 use url::Url;
 
-use hammond_data::dbqueries;
-use hammond_data::Source;
+use hammond_data::{dbqueries, opml, Source};
 
 use std::sync::mpsc::Sender;
 
 use app::Action;
 use stacks::Content;
-use utils::{itunes_to_rss, refresh};
+use utils::{self, itunes_to_rss, refresh};
 
 #[derive(Debug, Clone)]
 // TODO: split this into smaller
@@ -107,9 +107,12 @@ impl Header {
                 }));
         }));
 
-        self.about.connect_clicked(clone!(window => move |_| {
-                about_dialog(&window);
-        }));
+        self.about
+            .connect_clicked(clone!(window => move |_| about_dialog(&window)));
+
+        self.import.connect_clicked(
+            clone!(window, sender => move |_| on_import_clicked(&window, &sender)),
+        );
 
         // Add the Headerbar to the window.
         window.set_titlebar(&self.container);
@@ -226,6 +229,49 @@ fn on_url_change(
     }
 }
 
+fn on_import_clicked(window: &gtk::Window, sender: &Sender<Action>) {
+    use glib::translate::ToGlib;
+    use gtk::{FileChooserAction, FileChooserDialog, ResponseType};
+
+    // let dialog = FileChooserDialog::new(title, Some(&window), FileChooserAction::Open);
+    // TODO: It might be better to use a FileChooserNative widget.
+    // Create the FileChooser Dialog
+    let dialog = FileChooserDialog::with_buttons(
+        Some("Select the file from which to you want to Import Shows."),
+        Some(window),
+        FileChooserAction::Open,
+        &[
+            ("_Cancel", ResponseType::Cancel),
+            ("_Open", ResponseType::Accept),
+        ],
+    );
+
+    dialog.connect_response(clone!(sender => move |dialog, resp| {
+        debug!("Dialong Response {}", resp);
+        if resp == ResponseType::Accept.to_glib() {
+            // TODO: Show an in-app notifictaion if the file can not be accessed
+            if let Some(filename) = dialog.get_filename() {
+                debug!("File selected: {:?}", filename);
+
+                rayon::spawn(clone!(sender => move || {
+                    // Parse the file and import the feeds
+                    if let Ok(sources) = opml::import_from_file(filename) {
+                        // Refresh the succesfully parsed feeds to index them
+                        utils::refresh(Some(sources), sender)
+                    } else {
+                        // TODO: Show an in-app notification if file can not be parsed
+                        error!("Failed to parse the Import file")
+                    }
+                }))
+            }
+        }
+
+        dialog.destroy();
+    }));
+
+    dialog.run();
+}
+
 // Totally copied it from fractal.
 // https://gitlab.gnome.org/danigm/fractal/blob/503e311e22b9d7540089d735b92af8e8f93560c5/fractal-gtk/src/app.rs#L1883-1912
 fn about_dialog(window: &gtk::Window) {