Load more templates from external server (#217)

CMakeLists.txt

@@ -27,6 +27,7 @@ set (PKG_DEPS
     json-glib-1.0
     gudev-1.0
     libevdev
+    libsoup-2.4
 )
 
 set (VALA_DEPS
@@ -37,6 +38,7 @@ set (VALA_DEPS
     gudev-1.0
     libevdev
     linux
+    libsoup-2.4
 )
 
 

data/assets.gresource.xml

@@ -17,7 +17,6 @@
     <file alias="save-footer" compressed="false" preprocess="">SaveFooter-min.html</file>
   </gresource>
   <gresource prefix="/com/github/philip-scott/spice-up/templates">
-    <file alias="BigCity.spice" compressed="false" preprocess="">assets/templates/BigCity.spice</file>
     <file alias="Black.spice" compressed="false" preprocess="">assets/templates/Black.spice</file>
     <file alias="Colorful.spice" compressed="false" preprocess="">assets/templates/Colorful.spice</file>
     <file alias="Green.spice" compressed="false" preprocess="">assets/templates/Green.spice</file>

schemas/com.github.philip-scott.spice-up.gschema.xml

@@ -41,5 +41,11 @@
             <summary>Controler configuration for presentation mode</summary>
             <description>In JSON format</description>
         </key>
+
+        <key name="last-fetch" type="s">
+            <default>"0"</default>
+            <summary>Last time it fetched templates from server</summary>
+            <description>Stored to fetch templates only once every day</description>
+        </key>
     </schema>
 </schemalist>

src/CMakeLists.txt

@@ -17,6 +17,7 @@ vala_precompile(VALA_C
   Services/Settings.vala
   Services/Slide.vala
   Services/SlideManager.vala
+  Services/Fetcher.vala
   Services/FileManager.vala
   Services/HistoryManager.vala
   Services/ImageHandler.vala

src/Services/Fetcher.vala

@@ -0,0 +1,92 @@
+/*
+* Copyright (c) 2018 Felipe Escoto (https://github.com/Philip-Scott/Spice-up)
+*
+* This program is free software; you can redistribute it and/or
+* modify it under the terms of the GNU General Public
+* License as published by the Free Software Foundation; either
+* version 2 of the License, or (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+* General Public License for more details.
+*
+* You should have received a copy of the GNU General Public
+* License along with this program; if not, write to the
+* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+* Boston, MA 02111-1307, USA.
+*
+* Authored by: Felipe Escoto <felescoto95@hotmail.com>
+*/
+
+public class Spice.Services.Fetcher {
+    private const string TEMPLATES_URL = "https://spice-up-dev.azurewebsites.net/api/get-templates";
+    private const int64 CACHE_LIFE = 43200; // 1/2 a day
+    public const int CURRENT_VERSION = 1;
+
+    private File cache_file;
+    private string cache = "";
+    private Mutex mutex = Mutex ();
+
+    public Fetcher () {
+        cache_file = File.new_for_path (Environment.get_tmp_dir () + "/com.github.philip-scott.spice-up.cache.json");
+    }
+
+    public void fetch () {
+        var now = new DateTime.now_utc ().to_unix ();
+
+        var settigns = Spice.Services.Settings.get_instance ();
+        var previous_fetch = int64.parse (settigns.last_fetch);
+
+        var try_to_fetch = now - previous_fetch > CACHE_LIFE || !cache_file.query_exists ();
+
+        if (try_to_fetch) {
+            debug ("Getting templates from server\n");
+            new Thread<void*> ("fetch-templates", () => {
+                mutex.lock ();
+
+                var session = new Soup.Session ();
+                var message = new Soup.Message ("GET", TEMPLATES_URL);
+
+                session.send_message (message);
+
+                var data = new StringBuilder ();
+                foreach (var c in message.response_body.data) {
+                    data.append ("%c".printf (c));
+                }
+
+                cache = data.str;
+                if (cache != "") {
+                    save_to_cache (cache);
+                    settigns.last_fetch = now.to_string ();
+                }
+
+                mutex.unlock ();
+
+                return null;
+            });
+        } else {
+            debug ("Getting templates from cache\n");
+        }
+    }
+
+    public string get_data () {
+        mutex.lock ();
+        if (cache == "" && cache_file.query_exists ()) {
+            cache = Services.FileManager.get_data (cache_file);
+        }
+
+        string data = cache;
+        mutex.unlock ();
+
+        return data;
+    }
+
+    private void save_to_cache (string data) {
+        try {
+            GLib.FileUtils.set_data (cache_file.get_path (), data.data);
+        } catch (Error e) {
+            warning ("Could not write cache to temp file \"%s\": %s", cache_file.get_basename (), e.message);
+        }
+    }
+}

src/Services/Settings.vala

@@ -26,6 +26,7 @@ public class Spice.Services.Settings : Granite.Services.Settings {
     public int pos_y { get; set; }
     public int window_width { get; set; }
     public int window_height { get; set; }
+    public string last_fetch { get; set; }
     public string[] last_files { get; set; }
     public string controler_config { get; set; }
 

src/Widgets/Library/Library.vala

@@ -21,7 +21,7 @@
 
 public class Spice.Widgets.Library.Library : Gtk.ScrolledWindow {
     private const string RESOURCE_PATH = "resource:///com/github/philip-scott/spice-up/templates/%s";
-    private const string TEMPLATES[] = {"Black.spice", "White.spice", "Green.spice", "Spice-Up.spice", "Paper.spice", "BigCity.spice", "Colorful.spice", "Landscape.spice"};
+    private const string TEMPLATES[] = {"Black.spice", "White.spice", "Green.spice", "Spice-Up.spice", "Paper.spice", "Colorful.spice", "Landscape.spice"};
 
     public signal void item_selected (string data);
     public signal void file_selected (File file);
@@ -79,4 +79,9 @@ public class Spice.Widgets.Library.Library : Gtk.ScrolledWindow {
         var item = new LibraryItem (file, real_file);
         item_box.add (item);
     }
+
+    public void add_from_data (string data, string? file_name) {
+        var item = new LibraryItem.from_data (data, file_name);
+        item_box.add (item);
+    }
 }

src/Widgets/Library/LibraryItem.vala

@@ -51,6 +51,13 @@ public class Spice.Widgets.Library.LibraryItem : Gtk.FlowBoxChild {
         get_thumbnail ();
     }
 
+    public LibraryItem.from_data (string data, string? file_name) {
+        Object (data: data);
+
+        title_label.label = file_name;
+        load_thumbnail ();
+    }
+
     construct {
         margin_top = 3;
         halign = Gtk.Align.CENTER;
@@ -197,15 +204,19 @@ public class Spice.Widgets.Library.LibraryItem : Gtk.FlowBoxChild {
                     get_template_data ();
                 }
 
-                var pixbuf = Utils.base64_to_pixbuf (Utils.get_thumbnail_data (data));
-
-                Idle.add (() => {
-                    slide_widget.pixbuf = pixbuf;
-                    return GLib.Source.REMOVE;
-                });
+                load_thumbnail ();
 
                 return null;
             });
         }
     }
+
+    private void load_thumbnail () {
+        var pixbuf = Utils.base64_to_pixbuf (Utils.get_thumbnail_data (data));
+
+        Idle.add (() => {
+            slide_widget.pixbuf = pixbuf;
+            return GLib.Source.REMOVE;
+        });
+    }
 }

src/Widgets/Welcome.vala

@@ -1,5 +1,5 @@
 /*
-* Copyright (c) 2016 Felipe Escoto (https://github.com/Philip-Scott/Spice-up)
+* Copyright (c) 2018 Felipe Escoto (https://github.com/Philip-Scott/Spice-up)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
@@ -20,15 +20,21 @@
 */
 
 public class Spice.Welcome : Gtk.Box {
+    private const string TEMPLATES_URL = "https://spice-up-dev.azurewebsites.net/api/get-templates";
+
     public signal void open_file (File file);
 
     private Granite.Widgets.Welcome welcome;
     private Spice.Widgets.Library.Library? library = null;
     private Spice.Widgets.Library.Library? templates = null;
+    private Spice.Services.Fetcher fetcher;
     private Gtk.Separator separator;
     private Gtk.Stack welcome_stack;
 
     public Welcome () {
+        fetcher = new Spice.Services.Fetcher ();
+        fetcher.fetch ();
+
         orientation = Gtk.Orientation.HORIZONTAL;
         get_style_context ().add_class ("view");
 
@@ -75,6 +81,8 @@ public class Spice.Welcome : Gtk.Box {
                     open_file (file);
                 }
             });
+
+            load_remote_templates ();
         }
 
         welcome_stack.set_visible_child_full ("templates", Gtk.StackTransitionType.SLIDE_RIGHT);
@@ -107,4 +115,22 @@ public class Spice.Welcome : Gtk.Box {
             separator.no_show_all = true;
         }
     }
-}
+
+    private void load_remote_templates () {
+        var json_data = Spice.Utils.get_json_object (fetcher.get_data ());
+
+        if (json_data == null) return;
+
+        if (json_data.get_int_member ("version") > Spice.Services.Fetcher.CURRENT_VERSION) return;
+
+        var templates_array = json_data.get_array_member ("templates");
+
+        Idle.add (() => {
+            foreach (var raw in templates_array.get_elements ()) {
+                var template = raw.get_object ();
+                templates.add_from_data (template.get_string_member ("data"), template.get_string_member ("name"));
+            }
+            return GLib.Source.REMOVE;
+        });
+    }
+}