Can get information about a single post

src/helpers/PostsHelper.ts

@@ -230,6 +230,37 @@ export class PostsHelper {
 		return results.map((r) => this.DBToPost(r));
 	}
 
+	/**
+	 * Get information about a single post
+	 * 
+	 * @param postID Target post ID
+	 */
+	public static async GetSingle(postID: number) : Promise<Post> {
+		const row = await DatabaseHelper.QueryRow({
+			table: TABLE_NAME,
+			where: {
+				ID: postID
+			}
+		});
+
+		if(row == null)
+			throw new Error("Post " + postID + " not found!");
+		
+		return this.DBToPost(row);
+	}
+
+	/**
+	 * Get the access level of a user over a post
+	 * 
+	 * This is a convenience function
+	 * 
+	 * @param userID Target user ID
+	 * @param postID Target post ID
+	 */
+	public static async GetAccessLevelFromPostID(userID: number, postID: number) : Promise<PostAccessLevel> {
+		return await this.GetAccessLevel(userID, await this.GetSingle(postID));
+	}
+
 	/**
 	 * Get the access level of a user over a post
 	 * 
@@ -312,6 +343,20 @@ export class PostsHelper {
 		return !post.isUserPage || await UserHelper.AllowComments(post.userPageID);
 	}
 
+	/**
+	 * Check out whether a post exists or not
+	 * 
+	 * @param postID The id of the post to check
+	 */
+	public static async Exists(postID: number) : Promise<boolean> {
+		return await DatabaseHelper.Count({
+			table: TABLE_NAME,
+			where: {
+				ID: postID
+			}
+		}) > 0;
+	}
+
 	/**
 	 * Turn a database entry into a row object
 	 *