Pseudo Code for becomeVeterinarian Function

Overview

The function becomeVeterinarian updates a user's profile from a Pet Owner to a Veterinarian in a database and internal user management system. It handles database updates, user type conversions, and visual alerts to the user.

Pseudo Code Steps

1. Function Definition

   • Define function becomeVeterinarian with parameter userID.
   • Handle potential SQL exceptions.

2. Database Update

   • Construct SQL query to set UserType to 1 for the given userID.
   • Execute the query using the database modification method.
   • Store the result (isUpdated) of the operation.

3. Check Update Status

   • If isUpdated is true:

     1. User Array Iteration:

        • Iterate through the user array userArr using index i from 0 to nrOfUsers.
        • Retrieve user from userArr at index i.
        • Check if user is an instance of PetOwner and if the userID matches.

     2. Create Veterinarian Object:

        • If the checks pass, create a Veterinarian object newVet using the attributes of user.

     3. Update User Array:

        • Replace the existing PetOwner entry in userArr with newVet.

     4. Update Names Arrays:

        • Update nameAndSurnameVetArr at index i with the new veterinarian's formatted name.
        • Set nameAndSurnamePetOwnerArr at index i to null.

     5. User Notification:

        • Show a dialog box indicating successful conversion to a Veterinarian.

     6. Exit Loop:

        • Break the loop since the user type change has already been processed.

   • If isUpdated is false:

     1. User Notification:
        • Show a dialog box indicating the failure to update the user in the database.

Pseudo Code Representation

function becomeVeterinarian(userID):
    try:
        sql = "UPDATE useraccounts SET UserType = 1 WHERE UserID = userID"
        isUpdated = db.modifyData(sql)

        if isUpdated:
            for i from 0 to nrOfUsers:
                user = userArr[i]
                
                if user is an instance of PetOwner and user.getUserID() == userID:
                    newVet = new Veterinarian(user.getUserID(), 
                                               user.getFirstName(), 
                                               user.getSurname(), 
                                               1, 
                                               user.getEmailAddress(), 
                                               user.getPassword(), 
                                               true)
                    userArr[i] = newVet
                    nameAndSurnameVetArr[i] = "(" + newVet.getUserID() + ") " + 
                                               newVet.getFirstName() + " " + 
                                               newVet.getSurname()
                    nameAndSurnamePetOwnerArr[i] = null
                    
                    showDialog("User has been successfully converted to a Veterinarian.")
                    break

        else:
            showDialog("Failed to update user in the database.")

    catch SQLException:
        handleError("Database operation failed.")

Key Components

• Function Definition: Establishes the input and expected process.
• Database Interaction: Utilizing SQL for updates.
• Conditional Logic: Checks for successful updates and appropriate user types.
• Data Structure Management: Updates the user and name arrays.
• User Feedback: Provides clear communication of success or failure.

This pseudo code provides a structured approach to understanding the functionality of the becomeVeterinarian operation, serving as a clear guide for documentation and further development.