/** * Switches the current user to another role for the current session and only * in the given context. * * The caller *must* check * - that this op is allowed * - that the requested role can be switched to in this context (use get_switchable_roles) * - that the requested role is NOT $CFG->defaultuserroleid * * To "unswitch" pass 0 as the roleid. * * This function *will* modify $USER->access - beware * * @param integer $roleid the role to switch to. * @param object $context the context in which to perform the switch. * @return bool success or failure. */ function role_switch($roleid, $context) { global $USER; // // Plan of action // // - Add the ghost RA to $USER->access // as $USER->access['rsw'][$path] = $roleid // // - Make sure $USER->access['rdef'] has the roledefs // it needs to honour the switcheroo // // Roledefs will get loaded "deep" here - down to the last child // context. Note that // // - When visiting subcontexts, our selective accessdata loading // will still work fine - though those ra/rdefs will be ignored // appropriately while the switch is in place // // - If a switcheroo happens at a category with tons of courses // (that have many overrides for switched-to role), the session // will get... quite large. Sometimes you just can't win. // // To un-switch just unset($USER->access['rsw'][$path]) // // Note: it is not possible to switch to roles that do not have course:view // Add the switch RA if (!isset($USER->access['rsw'])) { $USER->access['rsw'] = array(); } if ($roleid == 0) { unset($USER->access['rsw'][$context->path]); if (empty($USER->access['rsw'])) { unset($USER->access['rsw']); } return true; } $USER->access['rsw'][$context->path] = $roleid; // Load roledefs $USER->access = get_role_access_bycontext($roleid, $context, $USER->access); return true; }
/** * Switches the current user to another role for the current session and only * in the given context. * * The caller *must* check * - that this op is allowed * - that the requested role can be assigned in this ctx * (hint, use get_assignable_roles_for_switchrole()) * - that the requested role is NOT $CFG->defaultuserroleid * * To "unswitch" pass 0 as the roleid. * * This function *will* modify $USER->access - beware * * @param integer $roleid * @param object $context * @return bool */ function role_switch($roleid, $context) { global $USER, $CFG; // // Plan of action // // - Add the ghost RA to $USER->access // as $USER->access['rsw'][$path] = $roleid // // - Make sure $USER->access['rdef'] has the roledefs // it needs to honour the switcheroo // // Roledefs will get loaded "deep" here - down to the last child // context. Note that // // - When visiting subcontexts, our selective accessdata loading // will still work fine - though those ra/rdefs will be ignored // appropriately while the switch is in place // // - If a switcheroo happens at a category with tons of courses // (that have many overrides for switched-to role), the session // will get... quite large. Sometimes you just can't win. // // To un-switch just unset($USER->access['rsw'][$path]) // // Add the switch RA if (!isset($USER->access['rsw'])) { $USER->access['rsw'] = array(); } if ($roleid == 0) { unset($USER->access['rsw'][$context->path]); if (empty($USER->access['rsw'])) { unset($USER->access['rsw']); } return true; } $USER->access['rsw'][$context->path] = $roleid; // Load roledefs $USER->access = get_role_access_bycontext($roleid, $context, $USER->access); /* DO WE NEED THIS AT ALL??? // Add some permissions we are really going // to always need, even if the role doesn't have them! $USER->capabilities[$context->id]['moodle/course:view'] = CAP_ALLOW; */ return true; }