source: trunk/src/org/expeditee/auth/tags/AuthenticationTag.java@ 1243

package org.expeditee.auth.tags;

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")), 
        EmailAgain ("txtEmailAgain", System.getProperty("user.email.again")),
        ColleagueOne ("txtColleagueOne", System.getProperty("user.colleague.one")), 
        ColleagueTwo ("txtColleagueTwo", System.getProperty("user.colleague.two")), 
        Frameset ("txtFrameset", System.getProperty("user.toshare.frameset")); 
        
        public String val;
        public String def;

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