As part of the diploma thesis, we have developed a web application for key lending and overall key management. In music schools, students need a space to practice their instruments, which they have previously requested from the janitor, who wrote down their name, surname and the room number on a piece of paper. In order to prevent mistakes and increase control and also obtain loan statistics, we have prepared a web application for them. The web application allows constant monitoring of practice rooms as well as data about the person who borrowed the key. In addition, the janitor has access to an overview of all active and expired loans. The advantage of the application is mainly that it allows easy authentication of persons. In order to borrow a key, the student must show the janitor one of the identification documents previously determined by the school. Of course, keys are not only borrowed by students, but also by school staff and guests. The application therefore has a synchronization with the ŠPICA system, through which we identify school employees. In the event that a room is rented by external event performers, the janitor has an easy way to add guests. In addition to all basic functionalities, a prohibition functionality has also been added, as the application itself detects if the key has not been returned by the agreed time. Due to this application, students begun to respect the agreed loan times, and the janitor has also found it easier to control all the keys. Since the application has been in use, the number of exceeded loans has decreased significantly and no keys have been lost.
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