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- /*
- * Copyright (c) 2006-2015 DMDirc Developers
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
- package com.dmdirc.commandparser.aliases;
-
- import com.dmdirc.FrameContainer;
- import com.dmdirc.commandparser.CommandArguments;
- import com.dmdirc.commandparser.commands.Command;
- import com.dmdirc.commandparser.commands.context.CommandContext;
- import com.dmdirc.interfaces.CommandController;
-
- import javax.annotation.Nonnull;
-
- /**
- * {@link Command} implementation that handles an alias.
- */
- public class AliasCommandHandler extends Command {
-
- private final Alias alias;
-
- public AliasCommandHandler(final CommandController controller, final Alias alias) {
- super(controller);
- this.alias = alias;
- }
-
- @Override
- public void execute(@Nonnull final FrameContainer origin, final CommandArguments args,
- final CommandContext context) {
- if (args.getArguments().length >= alias.getMinArguments()) {
- for (String line : alias.getSubstitution().split("\n")) {
- origin.getCommandParser().parseCommand(origin, getSubstituteCommand(line, args));
- }
- } else {
- sendLine(origin, args.isSilent(), FORMAT_ERROR, alias.getName() + " requires at least "
- + alias.getMinArguments() + " argument"
- + (alias.getMinArguments() == 1 ? "" : "s") + ".");
- }
- }
-
- /**
- * Gets the command that should be executed, with the appropriate substitutions made.
- * <p>
- * The returned command will have arguments substituted (replacing "$1-", "$2", etc), and will
- * be silenced if the given args are silent.
- *
- * @param line The line to substitute.
- * @param args The arguments entered by the user.
- *
- * @return The substituted command to execute.
- */
- private String getSubstituteCommand(final String line, final CommandArguments args) {
- final StringBuilder builder = new StringBuilder(line.trim());
-
- final String[] arguments = args.getArguments();
- for (int i = 0; i < arguments.length; i++) {
- replaceAll(builder, "$" + (i + 1) + "-", args.getArgumentsAsString(i));
- replaceAll(builder, "$" + (i + 1), arguments[i]);
- }
-
- if (args.isSilent()) {
- builder.insert(0, getController().getSilenceChar());
- }
- builder.insert(0, getController().getCommandChar());
-
- return builder.toString();
- }
-
- /**
- * Replaces all instances of the specified substring in the builder.
- *
- * @param builder The builder to modify.
- * @param substr The substring to replace.
- * @param replacement The string to use as a replacement.
- */
- private static void replaceAll(final StringBuilder builder,
- final String substr, final String replacement) {
- int index = builder.indexOf(substr);
- while (index > -1) {
- builder.replace(index, index + substr.length(), replacement);
- index = builder.indexOf(substr);
- }
- }
-
- }
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