source: trunk/src/org/expeditee/encryption/Label.java@ 1401

package org.expeditee.encryption;

import java.util.Base64;
import java.util.Collection;

import org.expeditee.auth.AuthenticatorBrowser;
import org.expeditee.gui.Frame;
import org.expeditee.gui.FrameIO;
import org.expeditee.items.Text;
import org.expeditee.settings.UserSettings;

public class Label {
        
        public static LabelResult resolveKey(String label) {
                String credentialsFrameName = UserSettings.ProfileName.get() + 
                                AuthenticatorBrowser.CREDENTIALS_FRAME;
                Frame credentialsFrame = FrameIO.LoadFrame(credentialsFrameName);
                Collection<Text> textItems = credentialsFrame.getTextItems();
                textItems.removeIf(t -> !t.getText().equals("Secrets"));
                textItems.removeIf(t -> !t.hasLink());
                if (textItems.isEmpty()) {
                        return LabelResult.ErrorUnableToFindSecretsFrame;
                }
                Text linkToSecretsFrame = textItems.iterator().next();
                if (!linkToSecretsFrame.hasLink()) {
                        return LabelResult.ErrorUnableToFindSecretsFrame;
                }
                Frame secretsFrame = FrameIO.LoadFrame(linkToSecretsFrame.getParent().getFramesetName() + linkToSecretsFrame.getLink());
                Collection<Text> labels = secretsFrame.getTextItems();
                labels.removeIf(lbl -> !lbl.getText().equals(label));
                labels.removeIf(lbl -> lbl.getData() == null || lbl.getData().size() == 0);
                if (labels.isEmpty()) {
                        return LabelResult.ErrorUnableToFindLabel;
                }
                Text labelItem = labels.iterator().next();
                String data = labelItem.getData().get(0);
                if (data.contains("{")) {
                        data = data.substring(data.indexOf('}') + 1).trim();
                        LabelResult res = LabelResult.SuccessResolveLabelToPartialKey;
                        res.key = Base64.getDecoder().decode(data);
                        return res;
                } else {
                        try {
                                LabelResult res = LabelResult.SuccessResolveLabelToKey;
                                res.key = Base64.getDecoder().decode(data);
                                return res;
                        } catch (IllegalArgumentException e) {
                                return LabelResult.ErrorUnableToFindLabel;
                        }
                }
        }
        
        public enum LabelResult {
                SuccessResolveLabelToKey, 
                SuccessResolveLabelToPartialKey, 
                ErrorUnableToFindSecretsFrame, 
                ErrorUnableToFindLabel;
                
                public byte[] key;
                
                @Override
                public String toString() {
                        switch (this) {
                        case SuccessResolveLabelToKey:
                                return "Resolved label to key: " + Base64.getEncoder().encodeToString(key);
                        case SuccessResolveLabelToPartialKey:
                                return "Resolved label to slice of a key: " + Base64.getEncoder().encodeToString(key);
                        case ErrorUnableToFindSecretsFrame:
                                return "Unable to find your Secrets Frame.";
                        case ErrorUnableToFindLabel:
                                return "Unable to resolve label to encrypt/decrypt frame.  Label: ";
                        }
                        
                        String message = "Was the list of possible enum results updated without nessasary changes to the toString() function?";
                        throw new IllegalArgumentException(message);
                }
        }
}