Refactor windows-notification plugin

plugins/windows-notification/src/plugin.vala

@@ -16,11 +16,14 @@ public class Plugin : RootInterface, Object {
     [CCode (has_target = false)]
     private delegate void notification_callback(void* conv);
 
-    [CCode (cname = "init", cheader_filename = "wintoast.h")]
-    private static extern int init(notification_callback callback);
+    [CCode (cname = "load_library", cheader_filename = "wintoast.h")]
+    private static extern int load_library();
 
-    [CCode (cname = "uninit", cheader_filename = "wintoast.h")]
-    private static extern void uninit();
+    [CCode (cname = "init_library", cheader_filename = "wintoast.h")]
+    private static extern int init_library(notification_callback callback);
+
+    [CCode (cname = "uninit_library", cheader_filename = "wintoast.h")]
+    private static extern void uninit_library();
 
     [CCode (cname = "show_message", cheader_filename = "wintoast.h")]
     private static extern int show_message(char* sender, char* message, char* imagePath, char* protocolName, void *conv);
@@ -36,8 +39,10 @@ public class Plugin : RootInterface, Object {
 
     public void registered(Dino.Application app) {
         this.app = app;
-
-        init(onclick_callback);
+        if (load_library() != 1 ||
+            init_library(onclick_callback) != 1) {
+            return;
+        }
 
         app.stream_interactor.get_module(NotificationEvents.IDENTITY).notify_content_item.connect((item, conversation) => {
             if (item.type_ == "message") {
@@ -52,13 +57,15 @@ public class Plugin : RootInterface, Object {
                 //var message = item.encryption == Encryption.NONE ? message_item.message.body : "*encrypted*";
                 var message = message_item.message.body;
                 var sender = conversation.nickname != null ? conversation.nickname : conversation.counterpart.to_string();
-                show_message(sender, message + "\n", "", "", this);
+                if (show_message(sender, message, "", "", this) != 0) {
+                    stderr.printf("Error sending notification.");
+                };
             }
         });
     }
 
     public void shutdown() {
-        uninit();
+        uninit_library();
     }
 }
 

plugins/windows-notification/src/wintoast.c

@@ -3,47 +3,48 @@
 
 #include "wintoast.h"
 
-void(*callback)(void*) = NULL;
+static HMODULE library_handle = NULL;
+static PidginWinToastLibInitType library_init = NULL;
+static PidginWinToastLibShowMessageType library_show_message = NULL;
 
-HMODULE library_handle = NULL;
-
-typedef void(*ClickCallbackType)(void*);
-typedef int(*PidginWinToastLibInitType)(ClickCallbackType);
-typedef int(*PidginWinToastLibShowMessageType)(const char*, const char*, const char*, const char*, void*);
-
-PidginWinToastLibInitType library_init = NULL;
-PidginWinToastLibShowMessageType library_show_message = NULL;
-
-void init(ClickCallbackType notification_click_callback) {
-    printf("Inicializando\n");
-
-    callback = notification_click_callback;
+int load_library() {
     library_handle = LoadLibrary("PidginWinToastLib.dll");
-    if (library_handle) {
-        FARPROC function = GetProcAddress(library_handle, "pidginWinToastLibInit");
-        if (function) {
-            library_init = (PidginWinToastLibInitType)function;
+    if (!library_handle) {
+        return FALSE;
     }
     
+    FARPROC function = GetProcAddress(library_handle, "pidginWinToastLibInit");
+    if (!function) {
+        return FALSE;
+    }
+    library_init = (PidginWinToastLibInitType)function;
+
     function = GetProcAddress(library_handle, "pidginWinToastLibShowMessage");
-        if (function) {
+    if (!function) {
+        return FALSE;
+    }
     library_show_message = (PidginWinToastLibShowMessageType)function;
-        }
+    return TRUE;
 }
 
-    if (library_init) {
+int init_library(ClickCallbackType notification_click_callback) {
+    if (!library_init) {
+        return FALSE;
+    }
     library_init(notification_click_callback);
-    }
+    return TRUE;
 }
 
-void uninit() {
+void uninit_library() {
     if (library_handle) {
         FreeLibrary(library_handle);
     }
 }
 
-void show_message(const char * sender, const char * message, const char * imagePath, const char * protocolName, void *conv) {
+int show_message(const char * sender, const char * message, const char * imagePath, const char * protocolName, void *conv) {
     if (library_show_message) {
-        library_show_message(sender, message, imagePath, protocolName, conv);
+        return library_show_message(sender, message, imagePath, protocolName, conv);
     }
+
+    return -1;
 }

plugins/windows-notification/src/wintoast.h

@@ -1,8 +1,13 @@
 #ifndef WINTOAST
 #define WINTOAST 1
 
-void init(void(*notification_click_callback)(void *conv));
-void uninit();
-void show_message(const char * sender, const char * message, const char * imagePath, const char * protocolName, void *conv);
+typedef void(*ClickCallbackType)(void*);
+typedef int(*PidginWinToastLibInitType)(ClickCallbackType);
+typedef int(*PidginWinToastLibShowMessageType)(const char*, const char*, const char*, const char*, void*);
+
+int load_library();
+int init_library(ClickCallbackType click_callback);
+void uninit_library();
+int show_message(const char * sender, const char * message, const char * imagePath, const char * protocolName, void *conv);
 
 #endif