package org.infinispan.cli.shell;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import org.infinispan.cli.Context;
import org.infinispan.cli.commands.Argument;
import org.infinispan.cli.commands.Command;
import org.infinispan.cli.commands.ProcessedCommand;
import org.jboss.aesh.complete.CompleteOperation;
import org.jboss.aesh.complete.Completion;
public class Completer implements Completion {
private final Context context;
public Completer(Context context) {
this.context = context;
}
@Override
public void complete(CompleteOperation op) {
String buffer = op.getBuffer();
if(buffer.isEmpty()) {
// Nothing in the buffer, return all commands
for(String name : context.getCommandRegistry().getCommandNames()) {
Command command = context.getCommandRegistry().getCommand(name);
if(command.isAvailable(context)) {
op.addCompletionCandidate(name);
}
}
} else {
ProcessedCommand procCmd = new ProcessedCommand(buffer, op.getCursor());
if(!procCmd.isCommandComplete()) {
// A possibly incomplete command in the buffer, return the commands that match
for(String name : context.getCommandRegistry().getCommandNames()) {
Command command = context.getCommandRegistry().getCommand(name);
if(command.isAvailable(context) && name.startsWith(procCmd.getCommand())) {
op.addCompletionCandidate(name);
}
}
} else {
Command command = context.getCommandRegistry().getCommand(procCmd.getCommand());
if(command.isAvailable(context)) {
op.setOffset(op.getCursor());
for(Argument arg : procCmd.getArguments()) {
if(arg.getOffset()<op.getCursor()) {
op.setOffset(arg.getOffset());
} else {
break;
}
}
List<String> candidates = new ArrayList<>();
addPrefixMatches(procCmd.getCurrentArgument(), command.getOptions(), candidates);
command.complete(context, procCmd, candidates);
op.addCompletionCandidates(candidates);
}
}
}
}
public static void addPrefixMatches(Argument argument, Collection<String> all, List<String> candidates) {
if(argument==null) {
candidates.addAll(all);
} else {
String prefix = argument.getValue();
for(String s : all) {
if(s.startsWith(prefix)) {
candidates.add(s);
}
}
}
}
}