package net.i2p.router.web;
import java.util.List;
import net.i2p.data.Hash;
import net.i2p.router.RouterContext;
class ContextHelper {
/** @throws IllegalStateException if no context available */
public static RouterContext getContext(String contextId) {
List<RouterContext> contexts = RouterContext.listContexts();
if ( (contexts == null) || (contexts.isEmpty()) )
throw new IllegalStateException("No contexts. This is usually because the router is either starting up or shutting down.");
if ( (contextId == null) || (contextId.trim().length() <= 0) )
return contexts.get(0);
for (int i = 0; i < contexts.size(); i++) {
RouterContext context = contexts.get(i);
Hash hash = context.routerHash();
if (hash == null) continue;
if (hash.toBase64().startsWith(contextId))
return context;
}
// not found, so just give them the first we can find
return contexts.get(0);
}
}