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/**
 * ============LICENSE_START====================================================
 * org.onap.ccsdk
 * ===========================================================================
 * Copyright (c) 2023 AT&T Intellectual Property. All rights reserved.
 * ===========================================================================
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ============LICENSE_END====================================================
 *
 */

package org.onap.ccsdk.apps.cadi.util;

import org.onap.ccsdk.apps.cadi.UserChain;

public class UserChainManip {
    /**
        Build an element in the correct format for UserChain.
        Format:<APP>:<ID>:<protocol>[:AS][,<APP>:<ID>:<protocol>]*
        @see UserChain
    */
    public static StringBuilder build(StringBuilder sb, String app, String id, UserChain.Protocol proto, boolean as) {
        boolean mayAs;
        if (!(mayAs=sb.length()==0)) {
            sb.append(',');
        }
        sb.append(app);
        sb.append(':');
        sb.append(id);
        sb.append(':');
        sb.append(proto.name());
        if (as && mayAs) {
            sb.append(":AS");
        }
        return sb;
    }

    public static String idToNS(String id) {
        if (id==null) {
            return "";
        } else {
            StringBuilder sb = new StringBuilder();
            char c;
            int end;
            boolean first = true;
            for (int idx = end = id.length()-1;idx>=0;--idx) {
                if ((c = id.charAt(idx))=='@' || c=='.')  {
                    if (idx<end) {
                        if (first) {
                            first = false;
                        } else {
                            sb.append('.');
                        }
                        for (int i=idx+1;i<=end;++i) {
                            sb.append(id.charAt(i));
                        }
                    }
                    end=idx-1;
                    if (c=='@') {
                        break;
                    }
                }
            }
            return sb.toString();
        }
    }
}