[gnome-games/wip/exalm/cache2: 5/28] developer: Add 'has-loaded' property

[Alexander Mikhaylenko <alexm src gnome org>]

commit e0602f2c238d0895b75d2e0232152ee3c46c0ea1
Author: Alexander Mikhaylenko <exalm7659 gmail com>
Date:   Sun Sep 30 13:33:11 2018 +0500

    developer: Add 'has-loaded' property
    
    This will be used in subsequent commits to get rid of changed() signal.
    
    Use 'true' value for GenericDeveloper, because it's a simple string that
    is always available.
    
    Use 'false' for DummyDeveloper, because it doesn't have any value.
    
    Use 'notify::has-loaded' instead of 'connect' signal in DatabaseDeveloper,
    and connect signal lazily because it's impossible to handle already loaded
    (such as GenericDeveloper) case otherwise.

 src/core/developer.vala              |  2 ++
 src/database/database-developer.vala | 28 +++++++++++++++++++++++++---
 src/dummy/dummy-developer.vala       |  2 ++
 src/generic/generic-developer.vala   |  6 ++++++
 src/grilo/grilo-developer.vala       |  7 ++++---
 5 files changed, 39 insertions(+), 6 deletions(-)
---
diff --git a/src/core/developer.vala b/src/core/developer.vala
index a0507c17..c86c4e18 100644
--- a/src/core/developer.vala
+++ b/src/core/developer.vala
@@ -3,6 +3,8 @@
 public interface Games.Developer : Object {
        public signal void changed ();
 
+       public abstract bool has_loaded { get; protected set; }
+
        public abstract string get_developer ();
 
        public static uint hash (Developer developer) {
diff --git a/src/database/database-developer.vala b/src/database/database-developer.vala
index ef17dd87..3affeebc 100644
--- a/src/database/database-developer.vala
+++ b/src/database/database-developer.vala
@@ -15,6 +15,8 @@ private class Games.DatabaseDeveloper : Object, Developer {
        private Sqlite.Statement save_statement;
        private string loaded;
 
+       public bool has_loaded { get; protected set; }
+
        public DatabaseDeveloper (Sqlite.Database database, Developer developer, Uid uid) {
                this.developer = developer;
                this.uid = uid;
@@ -30,14 +32,31 @@ private class Games.DatabaseDeveloper : Object, Developer {
                }
        }
 
+       private void on_developer_loaded () {
+               if (!developer.has_loaded)
+                       return;
+
+               has_loaded = true;
+
+               try {
+                       save_developer ();
+               }
+               catch (Error e) {
+                       warning (e.message);
+               }
+       }
+
        public string get_developer () {
+               if (!has_loaded) {
+                       on_developer_loaded ();
+                       developer.notify["has-loaded"].connect (on_developer_loaded);
+               }
+
                try {
                        if (loaded == null)
                                load_developer ();
-                       if (loaded != "")
+                       if (loaded != "" && loaded != null)
                                return loaded;
-                       else
-                               save_developer ();
                }
                catch (Error e) {
                        warning (e.message);
@@ -56,6 +75,9 @@ private class Games.DatabaseDeveloper : Object, Developer {
                        loaded = load_statement.column_text (0) ?? "";
                else
                        warning ("Execution failed.");
+
+               if (loaded != "" && loaded != null)
+                       has_loaded = true;
        }
 
        private void save_developer () throws Error {
diff --git a/src/dummy/dummy-developer.vala b/src/dummy/dummy-developer.vala
index e3462812..84b5d759 100644
--- a/src/dummy/dummy-developer.vala
+++ b/src/dummy/dummy-developer.vala
@@ -1,6 +1,8 @@
 // This file is part of GNOME Games. License: GPL-3.0+.
 
 public class Games.DummyDeveloper : Object, Developer {
+       public bool has_loaded { get; protected set; }
+
        public string get_developer () {
                return "";
        }
diff --git a/src/generic/generic-developer.vala b/src/generic/generic-developer.vala
index 3499c940..cd791e37 100644
--- a/src/generic/generic-developer.vala
+++ b/src/generic/generic-developer.vala
@@ -3,6 +3,12 @@
 public class Games.GenericDeveloper : Object, Developer {
        private string developer;
 
+       public bool has_loaded { get; protected set; }
+
+       construct {
+               has_loaded = true;
+       }
+
        public GenericDeveloper (string developer) {
                this.developer = developer;
        }
diff --git a/src/grilo/grilo-developer.vala b/src/grilo/grilo-developer.vala
index 8a5d8eb4..8b056a92 100644
--- a/src/grilo/grilo-developer.vala
+++ b/src/grilo/grilo-developer.vala
@@ -4,7 +4,8 @@ public class Games.GriloDeveloper : Object, Developer {
        private GriloMedia media;
        private string developer;
        private bool resolving;
-       private bool resolved;
+
+       public bool has_loaded { get; protected set; }
 
        public GriloDeveloper (GriloMedia media) {
                this.media = media;
@@ -13,7 +14,7 @@ public class Games.GriloDeveloper : Object, Developer {
        }
 
        public string get_developer () {
-               if (resolving || resolved)
+               if (resolving || has_loaded)
                        return developer;
 
                resolving = true;
@@ -40,7 +41,7 @@ public class Games.GriloDeveloper : Object, Developer {
 
        private void load_media_developer (string developer_string) {
                developer = developer_string;
-               resolved = true;
+               has_loaded = true;
 
                changed ();
        }