/*
* Copyright 2009 Google Inc.
*
* 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.
*/
package com.google.feedserver.tools.commands;
import com.google.feedserver.tools.FeedClient;
import com.google.feedserver.tools.FeedClientCommand;
import com.google.feedserver.util.FileUtil;
import com.google.gdata.client.GoogleService;
import java.util.ArrayList;
import java.util.List;
/**
* Command for starting FSCT shell to execute multiple commands with one login.
*
* Usage: fsct shell <flags ...>
*/
public class Shell extends FeedClientCommand {
public static final String PROMPT = "fsct> ";
public static final String COMMAND_HELP = "help";
public static final String COMMAND_QUIT = "quit";
protected FeedClient feedClient;
public Shell(GoogleService service, FileUtil fileUtil, FeedClient feedClient) {
super(service, fileUtil);
this.feedClient = feedClient;
}
@Override
public void execute(String[] shellArgs) throws Exception {
for (;;) {
String[] args = parseCommandLine(FeedClient.readLine(PROMPT));
if (args.length == 0) {
// empty command line; do nothing
} else if (isCommand(args, getCommandName())) {
// already in shell: ignore
} else if (isCommand(args, COMMAND_QUIT)) {
break;
} else if (isCommand(args, COMMAND_HELP)) {
feedClient.printCommandUsage(true);
System.out.println();
System.out.println(" " + COMMAND_QUIT);
System.out.println(" Quits shell");
} else {
args = append(args, shellArgs);
FeedClient shell = new FeedClient(args);
shell.execute(args);
}
}
}
protected static String[] parseCommandLine(String commandLine) {
String[] args = commandLine.split(" ");
List<String> outList = new ArrayList<String>();
for (int i = 0; i < args.length; i++) {
args[i] = args[i].trim();
if (!args[i].isEmpty()) {
outList.add(args[i]);
}
}
String[] outArgs = new String[outList.size()];
return outList.toArray(outArgs);
}
protected boolean isCommand(String[] args, String commandName) {
return commandName.toLowerCase().equals(args[0].toLowerCase());
}
protected String[] append(String[] commandArgs, String[] shellArgs) {
String[] args = new String[commandArgs.length + shellArgs.length];
int i = 0;
for (; i < commandArgs.length; i++) {
args[i] = commandArgs[i];
}
for (int j = 0; j < shellArgs.length; j++) {
args[i + j] = shellArgs[j];
}
return args;
}
@Override
public void usage(boolean inShell) {
System.out.println(getFeedClientCommand(inShell) + getCommandName());
System.out.println(" Starts FSCT shell to execute multiple commands with one login");
}
}