Can create a private conversation

src/helpers/ConversationsHelper.ts

@@ -342,6 +342,35 @@ export class ConversationsHelper {
 
 	}
 
+	/**
+	 * Search for private conversations between two users
+	 * 
+	 * @param user1 The first user
+	 * @param user2 The second user
+	 * @returns The entire list of found conversations
+	 */
+	public static async FindPrivate(user1: number, user2: number) : Promise<Array<number>> {
+		const result = await DatabaseHelper.Query({
+			table: USERS_TABLE,
+			tableAlias: "t1",
+			joins: [
+				{
+					table: USERS_TABLE,
+					tableAlias: "t2",
+					condition: "t1.conv_id = t2.conv_id"
+				}
+			],
+			where: {
+				"t1.user_id": user1,
+				"t2.user_id": user2
+			},
+			customWhere: "(SELECT COUNT(*) FROM " + USERS_TABLE + " WHERE conv_id = t1.conv_id) = 2",
+			fields: ["t1.conv_id AS conv_id"]
+		});
+
+		return result.map(r => r.conv_id);
+	}
+
 	/**
 	 * Get the list of members of a conversation
 	 *