[gnome-games/wip/exalm/cache2: 17/22] database: Cache Description

[Alexander Mikhaylenko <alexm src gnome org>]

commit fed4aa76e6a68f2a17e0de4a2567bb51ab61d487
Author: Alexander Mikhaylenko <exalm7659 gmail com>
Date:   Tue Oct 2 19:30:34 2018 +0500

    database: Cache Description

 src/database/database-description.vala | 26 +++++++++++++++
 src/database/database-game.vala        |  4 ++-
 src/database/database-metadata.vala    | 58 ++++++++++++++++++++++++++++++++--
 src/database/database.vala             |  1 +
 src/meson.build                        |  1 +
 5 files changed, 87 insertions(+), 3 deletions(-)
---
diff --git a/src/database/database-description.vala b/src/database/database-description.vala
new file mode 100644
index 00000000..7c786ff8
--- /dev/null
+++ b/src/database/database-description.vala
@@ -0,0 +1,26 @@
+// This file is part of GNOME Games. License: GPL-3.0+.
+
+private class Games.DatabaseDescription : Object, Description {
+       private DatabaseMetadata metadata;
+
+       public bool has_loaded { get; protected set; }
+
+       public DatabaseDescription (DatabaseMetadata metadata) {
+               this.metadata = metadata;
+
+               if (metadata.description_loaded)
+                       has_loaded = true;
+               else {
+                       metadata.notify["description-loaded"].connect (on_description_loaded);
+                       metadata.get_description ();
+               }
+       }
+
+       private void on_description_loaded (Object object, ParamSpec param) {
+               has_loaded = metadata.description_loaded;
+       }
+
+       public string get_description () {
+               return metadata.get_description ();
+       }
+}
diff --git a/src/database/database-game.vala b/src/database/database-game.vala
index a98893f1..fffdb776 100644
--- a/src/database/database-game.vala
+++ b/src/database/database-game.vala
@@ -9,6 +9,7 @@ private class Games.DatabaseGame : Object, Game {
        private Game game;
 
        private Cooperative cooperative;
+       private Description description;
        private Developer developer;
 
        public DatabaseGame (Database database, Game game) {
@@ -18,6 +19,7 @@ private class Games.DatabaseGame : Object, Game {
                var metadata = database.get_metadata (game);
 
                cooperative = new DatabaseCooperative (metadata);
+               description = new DatabaseDescription (metadata);
                developer = new DatabaseDeveloper (metadata);
        }
 
@@ -58,7 +60,7 @@ private class Games.DatabaseGame : Object, Game {
        }
 
        public Description get_description () {
-               return game.get_description ();
+               return description;
        }
 
        public Rating get_rating () {
diff --git a/src/database/database-metadata.vala b/src/database/database-metadata.vala
index 5d62a2e2..d15ef0e8 100644
--- a/src/database/database-metadata.vala
+++ b/src/database/database-metadata.vala
@@ -2,7 +2,11 @@
 
 private class Games.DatabaseMetadata : Object {
        private const string LOAD_QUERY = """
-               SELECT cooperative, developer FROM game_metadata WHERE uid=$UID;
+               SELECT
+                       cooperative,
+                       description,
+                       developer
+               FROM game_metadata WHERE uid=$UID;
        """;
 
        private const string ADD_GAME_QUERY = """
@@ -13,6 +17,10 @@ private class Games.DatabaseMetadata : Object {
                UPDATE game_metadata SET cooperative=$COOPERATIVE WHERE uid=$UID;
        """;
 
+       private const string SAVE_DESCRIPTION_QUERY = """
+               UPDATE game_metadata SET description=$DESCRIPTION WHERE uid=$UID;
+       """;
+
        private const string SAVE_DEVELOPER_QUERY = """
                UPDATE game_metadata SET developer=$DEVELOPER WHERE uid=$UID;
        """;
@@ -20,18 +28,22 @@ private class Games.DatabaseMetadata : Object {
        private Game game;
        private Uid uid;
        private Cooperative cooperative;
+       private Description description;
        private Developer developer;
 
        private string uid_value;
        private bool cooperative_value;
+       private string description_value;
        private string developer_value;
 
        private Sqlite.Statement add_game_statement;
        private Sqlite.Statement load_statement;
        private Sqlite.Statement save_cooperative_statement;
+       private Sqlite.Statement save_description_statement;
        private Sqlite.Statement save_developer_statement;
 
        public bool cooperative_loaded { get; set; }
+       public bool description_loaded { get; set; }
        public bool developer_loaded { get; set; }
 
        private bool game_added;
@@ -41,6 +53,7 @@ private class Games.DatabaseMetadata : Object {
 
                uid = game.get_uid ();
                cooperative = game.get_cooperative ();
+               description = game.get_description ();
                developer = game.get_developer ();
 
                try {
@@ -49,6 +62,7 @@ private class Games.DatabaseMetadata : Object {
                        add_game_statement = Database.prepare (database, ADD_GAME_QUERY);
                        load_statement = Database.prepare (database, LOAD_QUERY);
                        save_cooperative_statement = Database.prepare (database, SAVE_COOPERATIVE_QUERY);
+                       save_description_statement = Database.prepare (database, SAVE_DESCRIPTION_QUERY);
                        save_developer_statement = Database.prepare (database, SAVE_DEVELOPER_QUERY);
 
                        load_metadata ();
@@ -68,6 +82,16 @@ private class Games.DatabaseMetadata : Object {
                return cooperative_value;
        }
 
+       public string get_description () {
+               if (!description_loaded) {
+                       on_description_loaded ();
+                       description.notify.connect (on_description_loaded);
+                       return description.get_description ();
+               }
+
+               return description_value;
+       }
+
        public string get_developer () {
                if (!developer_loaded) {
                        on_developer_loaded ();
@@ -89,6 +113,17 @@ private class Games.DatabaseMetadata : Object {
                save_cooperative ();
        }
 
+       private void on_description_loaded () {
+               if (!description.has_loaded)
+                       return;
+
+               description_value = description.get_description ();
+               description_loaded = true;
+
+               add_game ();
+               save_description ();
+       }
+
        private void on_developer_loaded () {
                if (!developer.has_loaded)
                        return;
@@ -114,6 +149,20 @@ private class Games.DatabaseMetadata : Object {
                }
        }
 
+       private void save_description () {
+               try {
+                       save_description_statement.reset ();
+                       Database.bind_text (save_description_statement, "$UID", uid_value);
+                       Database.bind_text (save_description_statement, "$DESCRIPTION", description_value);
+
+                       if (save_description_statement.step () != Sqlite.DONE)
+                               warning ("Execution failed.");
+               }
+               catch (Error e) {
+                       warning (e.message);
+               }
+       }
+
        private void save_developer () {
                try {
                        save_developer_statement.reset ();
@@ -159,7 +208,12 @@ private class Games.DatabaseMetadata : Object {
                        }
 
                        if (load_statement.column_type (1) != Sqlite.NULL) {
-                               developer_value = load_statement.column_text (1);
+                               description_value = load_statement.column_text (1);
+                               description_loaded = true;
+                       }
+
+                       if (load_statement.column_type (2) != Sqlite.NULL) {
+                               developer_value = load_statement.column_text (2);
                                developer_loaded = true;
                        }
                }
diff --git a/src/database/database.vala b/src/database/database.vala
index 57c3c8a2..431f0096 100644
--- a/src/database/database.vala
+++ b/src/database/database.vala
@@ -22,6 +22,7 @@ private class Games.Database : Object {
                CREATE TABLE IF NOT EXISTS game_metadata (
                        uid TEXT PRIMARY KEY NOT NULL,
                        cooperative INTEGER,
+                       description TEXT,
                        developer TEXT
                ) WITHOUT ROWID;
        """;
diff --git a/src/meson.build b/src/meson.build
index a2c72691..cf195219 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -47,6 +47,7 @@ vala_sources = [
 
   'database/database.vala',
   'database/database-cooperative.vala',
+  'database/database-description.vala',
   'database/database-developer.vala',
   'database/database-error.vala',
   'database/database-game.vala',