ContactAPI.apexc

@RestResource (urlMapping='/Contact/*')
global class ContactAPI {
    
    
// Define the HTTP GET method
    @HttpGet
    global static List<Contact> getContacts() {
        // Retrieve specific fields for up to 10 contacts
        return [SELECT Id, Name, Email, Phone FROM Contact LIMIT 10];
    }
    
    
    
    
// Define the HTTP POST method
    @HttpPost 
    global static Contact createContact(String contactFirstName, String contactLastName) {
        Contact con = new Contact(
            FirstName = contactFirstName,
            LastName = contactLastName
        );
    
        try {
            insert con;
        } catch (Exception e) {
            // Handle exception during contact creation or sending
            System.debug('Error: ' + e.getMessage());
        }
    
        return con;
    }
    
    
    
    
// Define the HTTP PUT method
 	@HttpPut
    global static string putContact(String contactFirstName, String contactLastName) {
        RestRequest req = RestContext.request;
        // Use more meaningful variable names
        String contactId = req.requestURI.substring(req.requestURI.lastindexof('/') + 1);
        
        // Add error handling for query
        Contact con;
        try {
            con = [SELECT Id FROM Contact WHERE Id = :contactId LIMIT 1];
        } catch (Exception e) {
            return 'Error: ' + e.getMessage();
        }
    
        // Update contact fields directly without querying
        con.FirstName = contactFirstName;
        con.LastName = contactLastName;
        update con;
    
        // Return a JSON response instead of a concatenated string
        return JSON.serialize(con);
    }
    
    
    
// Define the HTTP PATCH method
    @HttpPatch
    global static String patchContact(String contactFirstName, String contactLastName) {
        RestRequest req = RestContext.request;
        String contactId = req.requestURI.substring(req.requestURI.lastindexof('/') + 1);
    
        try {
            // Fetch the contact record
            Contact con = [SELECT Id, FirstName, LastName FROM Contact WHERE Id = :contactId LIMIT 1];
            
            // Update contact fields based on provided parameters
            if (contactFirstName != null) {
                con.FirstName = contactFirstName;
            }
            if (contactLastName != null) {
                con.LastName = contactLastName;
            }
    
            // Perform the update
            update con;
    
            // Return the updated contact record
            return JSON.serialize(con);
        } catch (Exception e) {
            return 'Error updating contact: ' + e.getMessage();
        }
    }
    
    
    
// Define the HTTP DELETE method
    @HttpDelete
    global static string deleteContact() {
        // Retrieving the incoming REST request
        RestRequest req = RestContext.request;
        
        // Extracting the contact Id from the request URI
        String contactId = req.requestURI.substring(req.requestURI.lastindexof('/') + 1);
        
        // Querying for the contact record to be deleted
        Contact contact = [SELECT Id FROM Contact WHERE id = :contactId LIMIT 1];
        
        // Deleting the contact record
        delete contact;
        
        // Returning a success message
        return 'Success Deletion';
    }

    
}