public String save()

in app/src/main/java/org/apache/roller/weblogger/ui/struts2/editor/Members.java [68:153]
66 lines of code
19 McCabe index (conditional complexity)

    public String save() {
        
        log.debug("Attempting to process weblog permissions updates");
        int numAdmins = 0; // make sure at least one admin
        int removed = 0;
        int changed = 0;
        List<WeblogPermission> permsList = new ArrayList<>();
        try {
            UserManager userMgr = WebloggerFactory.getWeblogger().getUserManager();   
            List<WeblogPermission> permsFromDB = userMgr.getWeblogPermissionsIncludingPending(getActionWeblog());

            // we have to copy the permissions list so that when we remove permissions
            // below we don't get ConcurrentModificationExceptions
            for (WeblogPermission perm : permsFromDB) {
                permsList.add(perm);
            }

            /* Check to see at least one admin would remain defined as a result of the save.
             * Not normally a problem, as only a blog admin can access this page and admins can't
             * demote themselves. However, the blog server admin can always access this page and
             * remove everyone even if not a member of the blog, causing orphan blogs unless this
             * check is in place.
             *
             * Also checking here to make sure an Admin is not demoting or removing himself.
             */
            User user = getAuthenticatedUser();
            boolean error = false;
            for (WeblogPermission perms : permsList) {
                String sval = getParameter("perm-" + perms.getUser().getId());
                if (sval != null) {
                    if (sval.equals(WeblogPermission.ADMIN) && !perms.isPending()) {
                        numAdmins++;
                    }
                    if (perms.getUser().getUserName().equals(user.getUserName())) {
                        // can't modify self
                        if (!sval.equals(WeblogPermission.ADMIN)) {
                            error = true;
                            addError("memberPermissions.noSelfModifications");
                        }
                    }
                }
            }
            if (numAdmins == 0) {
                addError("memberPermissions.oneAdminRequired");
                error = true;
            }
            // one iteration for each line (user) in the members table
            for (WeblogPermission perms : permsList) {

                String sval = getParameter("perm-" + perms.getUser().getId());
                if (sval != null) {
                    if (!error && !perms.hasAction(sval)) {
                        if ("-1".equals(sval)) {
                             userMgr.revokeWeblogPermission(
                                    perms.getWeblog(), perms.getUser(), WeblogPermission.ALL_ACTIONS);
                            removed++;
                        } else {
                            userMgr.revokeWeblogPermission(
                                    perms.getWeblog(), perms.getUser(), WeblogPermission.ALL_ACTIONS);
                            userMgr.grantWeblogPermission(
                                    perms.getWeblog(), perms.getUser(), Utilities.stringToStringList(sval, ","));
                            changed++;
                        }
                    }
                }
            }
            
            if (removed > 0 || changed > 0) {
                log.debug("Weblog permissions updated, flushing changes");                
                WebloggerFactory.getWeblogger().flush();
            }
            
        } catch (Exception ex) {
            log.error("Error saving permissions on weblog - "+getActionWeblog().getHandle(), ex);
            addError("memberPermissions.saveError");
        }
        
        if (removed > 0) {
            addMessage("memberPermissions.membersRemoved", Integer.toString(removed));
        }
        if (changed > 0) {
            addMessage("memberPermissions.membersChanged", Integer.toString(changed));
        }
        
        return LIST;
    }