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package eu.etaxonomy.taxeditor.security;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.Observable;
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import java.util.Observer;
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import org.eclipse.ui.AbstractSourceProvider;
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import org.eclipse.ui.ISources;
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import org.springframework.security.core.Authentication;
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import org.springframework.security.core.GrantedAuthority;
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import eu.etaxonomy.cdm.persistence.hibernate.permission.Role;
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import eu.etaxonomy.taxeditor.store.CdmStore;
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import eu.etaxonomy.taxeditor.store.LoginManager;
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/**
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* Provides the Roles assigned to the currently authenticated principal as the
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* variable {@code eu.etaxonomy.taxeditor.security.userRoles}
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*
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* @author a.kohlbecker
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*
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*/
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public class AuthenticationSourceProvider extends AbstractSourceProvider implements Observer {
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public final static String USER_ROLES_VARIABLE = "eu.etaxonomy.taxeditor.security.userRoles";
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public final static String USER_NAME_VARIABLE = "eu.etaxonomy.taxeditor.security.userName";
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public final static String USER_VARIABLE = "eu.etaxonomy.taxeditor.security.user";
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private final static String[] PROVIDED_SOURCE_NAMES = new String[] {
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USER_ROLES_VARIABLE,
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USER_NAME_VARIABLE,
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USER_VARIABLE
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};
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private final static Map<String, Object> stateMap = new HashMap<String, Object>();
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public AuthenticationSourceProvider() {
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super();
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initialize();
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}
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private void initialize() {
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CdmStore.getLoginManager().addObserver(this);
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}
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@Override
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public void dispose() {
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CdmStore.getLoginManager().deleteObserver(this);
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}
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@Override
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public Map getCurrentState() {
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// SecurityContextHolder.getContext().
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List<Role> roles = getCurrentAuthenticationsRoles();
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List<String> rolesStr = new ArrayList<String>(roles.size());
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for(Role r : roles){
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rolesStr.add(r.getAuthority());
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}
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stateMap.put(USER_ROLES_VARIABLE, rolesStr);
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stateMap.put(USER_VARIABLE, getCurrentAutheticationPrincipal());
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stateMap.put(USER_NAME_VARIABLE, getCurrentAutheticationName());
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return stateMap;
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}
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/**
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* @return
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*/
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private String getCurrentAutheticationName() {
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Authentication authentication = CdmStore.getCurrentAuthentiation();
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if (authentication != null) {
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return authentication.getName();
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}
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return null;
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}
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/**
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* @return most probably a Cdm User instance or null
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*/
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private Object getCurrentAutheticationPrincipal() {
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Authentication authentication = CdmStore.getCurrentAuthentiation();
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if (authentication != null) {
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return authentication.getPrincipal();
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}
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return null;
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}
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/*
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* TODO refactor into User once Role is a model class
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*/
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private List<Role> getCurrentAuthenticationsRoles() {
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List<Role> roles = new ArrayList<Role>();
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Authentication authentication = CdmStore.getCurrentAuthentiation();
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if (authentication == null) {
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return roles;
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}
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Collection<? extends GrantedAuthority> authorities = authentication
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.getAuthorities();
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if (authorities == null) {
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return roles;
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}
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Role role = null;
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for (GrantedAuthority ga : authorities) {
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try {
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// check if it is a valid role
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role = Role.fromString(ga.getAuthority());
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if (role != null) {
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roles.add(role);
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}
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} catch (Exception e) {
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/* IGNORE */
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}
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}
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return roles;
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}
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@Override
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public String[] getProvidedSourceNames() {
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return PROVIDED_SOURCE_NAMES;
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}
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@Override
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public void update(Observable o, Object arg) {
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if(o instanceof LoginManager){
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/*
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* This triggers an update of the variable state, and will update also
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* all listeners to the evaluation service. So that every menu point,
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* which is also expression controlled, gets updated too.
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*/
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fireSourceChanged(ISources.WORKBENCH, getCurrentState());
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}
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}
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}
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