/*
    * Copyright (C) 2018, Google LLC. and others
    *
    * This program and the accompanying materials are made available under the
    * terms of the Eclipse Distribution License v. 1.0 which is available at
    * https://www.eclipse.org/org/documents/edl-v10.php.
    *
    * SPDX-License-Identifier: BSD-3-Clause
    */
  package org.eclipse.jgit.transport;
  
  import static java.util.Objects.requireNonNull;
  
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.List;
  
  import org.eclipse.jgit.annotations.NonNull;
  import org.eclipse.jgit.annotations.Nullable;
  
  /**
   * ls-refs protocol v2 request.
   *
   * <p>
   * This is used as an input to {@link ProtocolV2Hook}.
   *
   * @since 5.1
   */
  public final class LsRefsV2Request {
  	private final List<String> refPrefixes;
  
  	private final boolean symrefs;
  
  	private final boolean peel;
  
  	@Nullable
  	private final String agent;
  
  	@NonNull
  	private final List<String> serverOptions;
  
  	private LsRefsV2Request(List<String> refPrefixes, boolean symrefs,
  			boolean peel, @Nullable String agent,
  			@NonNull List<String> serverOptions) {
  		this.refPrefixes = refPrefixes;
  		this.symrefs = symrefs;
  		this.peel = peel;
  		this.agent = agent;
  		this.serverOptions = requireNonNull(serverOptions);
  	}
  
  	/** @return ref prefixes that the client requested. */
  	public List<String> getRefPrefixes() {
  		return refPrefixes;
  	}
  
  	/** @return true if the client requests symbolic references. */
  	public boolean getSymrefs() {
  		return symrefs;
  	}
  
  	/** @return true if the client requests tags to be peeled. */
  	public boolean getPeel() {
  		return peel;
  	}
  
  	/**
  	 * @return agent as reported by the client
  	 *
  	 * @since 5.2
  	 */
  	@Nullable
  	public String getAgent() {
  		return agent;
  	}
  
  	/**
  	 * Get application-specific options provided by the client using
  	 * --server-option.
  	 * <p>
  	 * It returns just the content, without the "server-option=" prefix. E.g. a
  	 * request with server-option=A and server-option=B lines returns the list
  	 * [A, B].
  	 *
  	 * @return application-specific options from the client as an unmodifiable
  	 *         list
  	 *
  	 * @since 5.2
  	 */
  	@NonNull
  	public List<String> getServerOptions() {
  		return serverOptions;
  	}
  
  	/** @return A builder of {@link LsRefsV2Request}. */
  	public static Builder builder() {
  		return new Builder();
  	}
  
 	/** A builder for {@link LsRefsV2Request}. */
 	public static final class Builder {
 		private List<String> refPrefixes = Collections.emptyList();
 
 		private boolean symrefs;
 
 		private boolean peel;
 
 		private final List<String> serverOptions = new ArrayList<>();
 
 		private String agent;
 
 		private Builder() {
 		}
 
 		/**
 		 * @param value
 		 * @return the Builder
 		 */
 		public Builder setRefPrefixes(List<String> value) {
 			refPrefixes = value;
 			return this;
 		}
 
 		/**
 		 * @param value
 		 * @return the Builder
 		 */
 		public Builder setSymrefs(boolean value) {
 			symrefs = value;
 			return this;
 		}
 
 		/**
 		 * @param value
 		 * @return the Builder
 		 */
 		public Builder setPeel(boolean value) {
 			peel = value;
 			return this;
 		}
 
 		/**
 		 * Records an application-specific option supplied in a server-option
 		 * line, for later retrieval with
 		 * {@link LsRefsV2Request#getServerOptions}.
 		 *
 		 * @param value
 		 *            the client-supplied server-option capability, without
 		 *            leading "server-option=".
 		 * @return this builder
 		 * @since 5.2
 		 */
 		public Builder addServerOption(@NonNull String value) {
 			serverOptions.add(value);
 			return this;
 		}
 
 		/**
 		 * Value of an agent line received after the command and before the
 		 * arguments. E.g. "agent=a.b.c/1.0" should set "a.b.c/1.0".
 		 *
 		 * @param value
 		 *            the client-supplied agent capability, without leading
 		 *            "agent="
 		 * @return this builder
 		 *
 		 * @since 5.2
 		 */
 		public Builder setAgent(@Nullable String value) {
 			agent = value;
 			return this;
 		}
 
 		/** @return LsRefsV2Request */
 		public LsRefsV2Request build() {
 			return new LsRefsV2Request(
 					Collections.unmodifiableList(refPrefixes), symrefs, peel,
 					agent, Collections.unmodifiableList(serverOptions));
 		}
 	}
 }