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A collection of basic java utility classes that provide basic features for a standalone/simple JEE application. Backed by a Cassandra, MySQL, or SQLite database, it provides, web page templates, user and group management, and a searchable online audit log of all user activity.
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/*
 This is free and unencumbered software released into the public domain.

 Anyone is free to copy, modify, publish, use, compile, sell, or
 distribute this software, either in source code form or as a compiled
 binary, for any purpose, commercial or non-commercial, and by any
 means.

 In jurisdictions that recognize copyright laws, the author or authors
 of this software dedicate any and all copyright interest in the
 software to the public domain. We make this dedication for the benefit
 of the public at large and to the detriment of our heirs and
 successors. We intend this dedication to be an overt act of
 relinquishment in perpetuity of all present and future rights to this
 software under copyright law.

 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 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 base.jee.servlet;

import java.io.IOException;
import java.util.Date;
import java.util.Hashtable;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.UUID;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.stringtemplate.v4.NoIndentWriter;
import org.stringtemplate.v4.ST;

import base.KeyValue;
import base.jee.Breadcrumb;
import base.jee.Constants;
import base.jee.JeeBase;
import base.security.Group;
import base.security.Role;
import base.security.Person;
import base.security.User;
import base.text.StringHelper;
import org.stringtemplate.v4.misc.ErrorBuffer;

import static base.jee.Constants.URL_RESPONSE_TRUST_TIMEOUT;

public class PersonEditServlet extends BaseServlet {

	private static final long serialVersionUID = 1L;

	public PersonEditServlet(JeeBase jee) {
		super(jee);
	}

	@SuppressWarnings("unchecked")
	public void doGet(User u, HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

		UUID uuid = UUID.fromString(request.getParameter("id"));
		String firstName = request.getParameter("first_name");
		String lastName = request.getParameter("last_name");
		String email = request.getParameter("email");
		String expiry = request.getParameter("expiry");
		String qp = request.getParameter("q");
		String error = null;
		if(qp == null) { qp = ""; }

		String a = request.getParameter("a");
		if(a != null && !a.equals(u.getFormAuthToken())) {
			throw new IllegalArgumentException("Invalid authentication token.");
		}

		if(firstName != null) {
			try {
				if(a == null) {
					throw new IllegalArgumentException("Invalid authentication token.");
				}

				// Update the person details
				jee.getAPI().updatePerson(u, uuid, firstName, lastName, email, expiry);

				// Update the (non resource based) roles.
				for(Role r : jee.getRoles().nonResourceBasedRoles) {
					if(request.getParameter("role_" + r.getRole()) != null && request.getParameter("role_" + r.getRole()).equals("true")) {
						jee.getAPI().upsertRole(u, uuid, r.getRole());
					} else {
						jee.getAPI().deleteRole(u, uuid, r.getRole());
					}
				}

				response.setHeader("Location", settings.get("base.url", "") + "/person.edit?id=" + uuid + "&q=" + StringHelper.urlEscape(qp) + "&saved=ok");
				response.setStatus(HTTP_MOVED_TEMPORARILY);
				return;
			} catch(IOException e) {
				error = e.getMessage();
			} catch(IllegalArgumentException e) {
				error = e.getMessage();
			} catch(IllegalStateException e) {
				error = e.getMessage();
			}
		}

		if(request.getParameter("add_role") != null && request.getParameter("role_resource") != null) {
			if(a == null) {
				throw new IllegalArgumentException("Invalid authentication token.");
			}
			jee.getAPI().upsertResourceRole(u, uuid,
					request.getParameter("add_role"),
					jee.getRoles().getRole(request.getParameter("add_role")).getResourceType(),
					request.getParameter("role_resource"));
			response.setHeader("Location", settings.get("base.url", "") + "/person.edit?id="+uuid+"&q="+StringHelper.urlEscape(qp)+"&saved=ok");
			response.setStatus(HTTP_MOVED_TEMPORARILY);
		}

		if(request.getParameter("delete_role") != null && request.getParameter("resource") != null) {
			if(a == null) {
				throw new IllegalArgumentException("Invalid authentication token.");
			}
			Role role = jee.getRoles().getRole(request.getParameter("delete_role"));
			jee.getAPI().deleteResourceRole(u,
					role.getResourceType(),
					request.getParameter("resource"),
					uuid,
					request.getParameter("delete_role")
					);
			response.setHeader("Location", settings.get("base.url", "") + "/person.edit?id=" + uuid + "&q=" + StringHelper.urlEscape(qp) + "&saved=ok");
			response.setStatus(HTTP_MOVED_TEMPORARILY);
		}

		if(request.getParameter("update_groups") != null) {
			if(a == null) {
				throw new IllegalArgumentException("Invalid authentication token.");
			}
			String[] selectedGroups = request.getParameterValues("group");
			if(selectedGroups == null) {
				selectedGroups = new String[]{};
			}
			List currentGroups = jee.getAPI().getPersonGroups(u, uuid);
			for(Group g : currentGroups) {
				boolean found = false;
				for(String sg : selectedGroups) {
					if(sg.equals(g.getUuid().toString())) {
						found = true;
						break;
					}
				}
				if(!found) {
					jee.getAPI().leaveGroup(u, g.getUuid(), uuid);
				}
			}
			for(String sg : selectedGroups) {
				UUID found = null;
				for(Group g : currentGroups) {
					if(sg.equals(g.getUuid().toString())) {
						found = g.getUuid();
						break;
					}
				}
				if(found == null) {
					jee.getAPI().joinGroup(u, UUID.fromString(sg), uuid);
				}
			}
			response.setHeader("Location", settings.get("base.url", "") + "/person.edit?id="+uuid+"&q="+StringHelper.urlEscape(qp)+"&saved=ok");
			response.setStatus(HTTP_MOVED_TEMPORARILY);
		}

		Person p = jee.getAPI().getPerson(u, uuid);
		if(firstName != null) { firstName = firstName.trim(); }
		if(lastName != null) { lastName = lastName.trim(); }
		if(email != null) { email = email.trim(); }

		if(firstName == null) { firstName = p.getFirstName(); }
		if(lastName == null) { lastName = p.getLastName(); }
		if(email == null) { email = p.getEmail(); }
		if(expiry == null) { expiry = p.getExpiry() == null?"":Constants.DATE_FORMAT.format(p.getExpiry()); }

		List currentRoles = jee.getAPI().getPersonRoles(u, uuid);

		String roleToAdd = null;
		String roleToAddName = null;
		List possibleResourceBasedRoles = null;
		if(request.getParameter("add_role") != null && request.getParameter("role_resource") == null) {
			roleToAdd = request.getParameter("add_role");
			Role role = jee.getRoles().getRole(roleToAdd);
			roleToAddName = role.getName();
			possibleResourceBasedRoles = jee.getRoles().getResourceLookup(role.getResourceType()).list();
		}

		ST page = jee.getPage(u, "person_edit");
		page.add("uuid", p.getUuid());
		page.add("q", qp);

		// Used in the person editing form
		page.add("p", p);
		page.add("first_name", firstName);
		page.add("last_name", lastName);
		page.add("email", email);
		page.add("expiry", expiry);
		page.add("has_username", p.getUsername() != null && p.getUsername().length() > 0);

		List> adminRoles = buildNonResourceBasedRoleList(jee, u, uuid, currentRoles, request);
		page.add("roles", adminRoles);
		page.add("has_custom_role", adminRoles.size() > 0 && !(((Role)adminRoles.get(0).get("role")).isInternal()));
		page.add("error", error);

		List personGroups = jee.getAPI().getPersonGroups(u, uuid);
		for(Group g : personGroups) {
			page.add("groups", g);
		}

		if(u.hasRole(Constants.GROUP_MANAGE_ROLE)) {
			List groups = jee.getAPI().getGroups(u);
			page.add("group_manager", groups.size() > 0);
			page.add("group_list", groups.size() > 0);
			for(Group g : groups) {
				if(g.getType() == 0) { // Users cant be added to system groups.
					continue;
				}
				Map gm = new Hashtable<>();
				gm.put("key", g.getUuid().toString());
				gm.put("value", g.getName());
				boolean isMember = false;
				for(Group pg : personGroups) {
					if(pg.getUuid().equals(g.getUuid())) {
						isMember = true;
						break;
					}
				}
				gm.put("selected", isMember);
				page.add("group_options", gm);
				page.add("show_groups", true);
			}
		} else {
			page.add("group_manager", false);
			page.add("show_groups", personGroups.size() > 0);
		}
		page.add("group_options", null);

		// Used in the role management form
		if(jee.getRoles().getResourceBasedRoles().size() == 0) {
			page.add("role_manager", false);
		} else {
			page.add("role_manager", true);
			page.add("rr", jee.getRoles().getResourceBasedRoles());
			page.add("possible_resource_based_roles", possibleResourceBasedRoles);
			page.add("role_to_add", roleToAdd);
			page.add("role_to_add_name", roleToAddName);
			page.add("current_resource_based_roles", buildResourceRoleList(currentRoles));
		}

		if(request.getParameter("saved") != null && p.getUpdated() != null && p.getUpdated().getTime() + URL_RESPONSE_TRUST_TIMEOUT > new Date().getTime()) {
			page.add("success", "Saved changes to " + StringHelper.escapeHtml(p.getDisplayName()) + "");
		} else {
			page.add("success", null);
		}
		page.add("ldap_enabled", jee.getSettings().get("ldap.enabled", "false").equals("true"));
		page.add("breadcrumbs", new Breadcrumb("People", "/people?q=" + StringHelper.urlEscape(qp)));
		page.add("breadcrumbs", new Breadcrumb(p.getDisplayName(), null));
		page.add("auth", u.getFormAuthToken());

		page.write(new NoIndentWriter(response.getWriter()), new ErrorBuffer());
	}

	/**
	 * User roles filtered by ones that are resource restricted.
	 */
	public List> buildResourceRoleList(List currentRoles) throws IOException {
		List> currentResourceBasedRoles = new LinkedList<>();
		for(base.security.PersonRole r : currentRoles) {
			if(r.getUid() != null) {
				Map info = new Hashtable<>();
				info.put("role", r.getRole());
				info.put("uid", r.getUid());
				Role role = jee.getRoles().getRole(r.getRole());
				if(role == null) {
					continue;
				}
				info.put("name", role.getName());
				KeyValue rs = jee.getRoles().getResourceLookup(r.getResource()).lookup(r.getUid());
				if(rs != null) {
					info.put("resource", rs.getValue());
				} else {
					info.put("resource", "Unknown/missing record: " + r.getUid());
				}
				currentResourceBasedRoles.add(info);
			}
		}
		return currentResourceBasedRoles;
	}

	/**
	 * Build the list of available roles, associated with a "selected" indicator for this person
	 */
	public static List> buildNonResourceBasedRoleList(JeeBase jee, User user, UUID uuid, List curerntRoles, HttpServletRequest request) throws IOException {
		List> roles = new LinkedList<>();

		//TODO: What is the use rand uuid used for?!?

		for(Role role : jee.getRoles().nonResourceBasedRoles) {
			Map i = new Hashtable<>();
			i.put("role", role);
			if(request.getParameter("first_name") != null) {
				i.put("selected", request.getParameter("role_" + role.getRole()) != null && request.getParameter("role_" + role.getRole()).equals("true"));
			} else {
				for(base.security.PersonRole rl : curerntRoles) {
					if(rl.getRole().equals(role.getRole())) {
						i.put("selected", true);
						break;
					}
				}
			}
			if(!i.containsKey("selected")) {
				i.put("selected", false);
			}
			roles.add(i);
		}

		return roles;
	}

}