diff --git a/src/entities/Notification.ts b/src/entities/Notification.ts
index 012aebc..636034e 100644
--- a/src/entities/Notification.ts
+++ b/src/entities/Notification.ts
@@ -48,7 +48,7 @@ export enum NotifEventVisibility {
 
 export interface NotifBuilder {
 	id ?: number,
-	timeCreate: number,
+	timeCreate ?: number,
 	seen ?: boolean,
 	fromUserID: number,
 	destUserID ?: number,
@@ -61,7 +61,8 @@ export interface NotifBuilder {
 }
 
 export class Notif implements NotifBuilder {
-	id ?: number;	timeCreate: number;
+	id ?: number;
+	timeCreate ?: number;
 	seen ?: boolean;
 	fromUserID: number;
 	destUserID ?: number;
@@ -79,4 +80,38 @@ export class Notif implements NotifBuilder {
 			}
 		}
 	}
+
+	get hasId() : boolean {
+		return this.id > 0
+	}
+
+	get hasSeen() : boolean {
+		return this.seen === true || this.seen === false
+	}
+
+	get hasFromUserID() : boolean {
+		return this.fromUserID > 0
+	}
+
+	get hasDestUserID() : boolean {
+		return this.destUserID > 0
+	}
+
+	get hasType() : boolean {
+		return this.type != null && this.type != undefined
+	}
+
+	get hasOnElemID() : boolean {
+		return this.onElemID > 0
+	}
+
+	get hasOnElemType() : boolean {
+		return this.onElemType != null && this.onElemType != undefined
+	}
+
+	get hasTimeCreate() : boolean {
+		return this.timeCreate != null
+			&& this.timeCreate != undefined
+			&& this.timeCreate > 0;
+	}
 }
\ No newline at end of file
diff --git a/src/helpers/NotificationsHelper.ts b/src/helpers/NotificationsHelper.ts
index aba146f..5d96dd1 100644
--- a/src/helpers/NotificationsHelper.ts
+++ b/src/helpers/NotificationsHelper.ts
@@ -1,5 +1,8 @@
 import { DatabaseHelper } from "./DatabaseHelper";
-import { Notif } from "../entities/Notification";
+import { Notif, NotifElemType, NotifEventVisibility } from "../entities/Notification";
+import { time } from "../utils/DateUtils";
+import { PostsHelper } from "./PostsHelper";
+import { PostPageKind, PostVisibilityLevel } from "../entities/Post";
 
 /**
  * Notifications helper
@@ -17,7 +20,81 @@ export class NotificationsHelper {
 	 * @param n Notification to push
 	 */
 	public static async Push(n: Notif) {
-		// TODO : push notification
+		
+		if(!n.hasTimeCreate)
+			n.timeCreate = time();
+		
+		// Determine the visibility level of the notification
+		if(n.onElemType == NotifElemType.POST) {
+			const post = await PostsHelper.GetSingle(n.onElemID);
+
+			// Determine post container
+			switch(post.kindPage) {
+				
+				case PostPageKind.PAGE_KIND_USER:
+					n.fromContainerType = NotifElemType.USER_PAGE
+					n.fromContainerID = post.userPageID
+					break;
+				
+				case PostPageKind.PAGE_KIND_GROUP:
+					n.fromContainerType = NotifElemType.GROUP_PAGE
+					n.fromContainerID = post.groupID
+					break;
+				
+				default:
+					throw new Error("Unsupported page kind: " + post.kindPage)
+			}
+
+
+			// Check the scope of the notification
+			if(post.visibilityLevel == PostVisibilityLevel.VISIBILITY_USER) {
+				
+				// Check if the user does not own the post
+				if(post.userID == post.userPageID)
+					return;
+				
+				// If the personn who posted that is not the owner of the page
+				else if(post.userPageID != n.fromUserID)
+					n.destUserID = post.userPageID
+				
+				// If the user is the one who own the page
+				else
+					n.destUserID = post.userID
+
+				await this.PushPrivate(n)
+			}
+
+			// TODO : continue
+		}
+	}
+
+	/**
+	 * Push a private notification
+	 * 
+	 * @param n The notification
+	 */
+	private static async PushPrivate(n: Notif) {
+		n.eventVisibility = NotifEventVisibility.EVENT_PRIVATE
+
+		if(await this.SimilarExists(n))
+			return;
+		
+
+		throw new Error("Create the notification!")
+		//await this.Create(n)
+	}
+
+	/**
+	 * Check out whether a similar notification exists
+	 * for a given notification
+	 * 
+	 * @param n The notification
+	 */
+	private static async SimilarExists(n: Notif) : Promise<boolean> {
+		return await DatabaseHelper.Count({
+			table: NOTIFICATIONS_TABLE,
+			where: this.NotifToDB(n)
+		}) > 0;
 	}
 
 	/**
@@ -53,6 +130,33 @@ export class NotificationsHelper {
 		return list.map((e) => this.DBToNotif(e));
 	}
 
+	/**
+	 * Turn a notification into a database entry
+	 * 
+	 * @param n The notification
+	 * @param allInfo True to return a full notification entry
+	 */
+	private static NotifToDB(n: Notif, allInfo = true) : any {
+		let data: any = {}
+
+		if(n.hasId) data.id = n.id
+		if(n.hasSeen) data.seen = n.seen ? 1 : 0
+		if(n.hasFromUserID) data.from_user_id = n.fromUserID
+		if(n.hasDestUserID) data.dest_user_id = n.destUserID
+		if(n.hasType) data.type = n.type
+		if(n.hasOnElemID) data.on_elem_id = n.onElemID
+		if(n.hasOnElemType) data.on_elem_type = n.onElemType
+
+		if(allInfo) {
+			data.from_container_id = n.fromContainerID
+			data.from_container_type = n.fromContainerType
+			data.time_create = n.timeCreate
+			data.visibility = n.eventVisibility
+		}
+
+		return data;
+	}
+
 	/**
 	 * Database entry to notification
 	 *