source: trunk/src/org/expeditee/auth/AuthenticationTag.java@ 1203

package org.expeditee.auth;

import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.Optional;

import org.expeditee.items.Text;

public enum AuthenticationTag {
        Username ("txtUsername", System.getProperty("user.name")), 
        Password ("txtPassword", System.getProperty("user.password")), 
        PasswordAgain ("txtPasswordAgain", System.getProperty("user.password.again")), 
        NewPassword ("txtNewPassword", System.getProperty("user.new.password")), 
        NewPasswordAgain ("txtNewPasswordAgain", System.getProperty("user.new.password.again")), 
        Email ("txtEmail", System.getProperty("user.email")), 
        ColleagueOne ("txtColleagueOne", System.getProperty("user.colleague.one")), 
        ColleagueTwo ("txtColleagueTwo", System.getProperty("user.colleague.two"));
        
        public String val;
        public String def;

        private AuthenticationTag(final String tag, final String def) {
                this.val = tag;
                this.def = def;         
        }
        
        public static Optional<Map<AuthenticationTag, String>> fetchUserData(final Collection<Text> from, final AuthenticationTag... tags) {
                final Map<AuthenticationTag, String> fetchedData = new HashMap<AuthenticationTag, String>();
                
                for (final AuthenticationTag tag: tags) {
                        for (final Text canditate: from) {
                                // use the canditate if it exists
                                if (canditate.hasData(tag.val)) {
                                        fetchedData.put(tag, canditate.getText());
                                        break;
                                }
                                // otherwise try use the default
                                final String property = tag.def;
                                if (property != null && !property.isEmpty()) { 
                                        fetchedData.put(tag, property); 
                                }
                        }
                }
                
                if (fetchedData.entrySet().size() == tags.length) {
                        return Optional.of(fetchedData);
                } else { 
                        return Optional.empty();
                }
        }
}