656 lines
18 KiB
TypeScript
656 lines
18 KiB
TypeScript
import semver from "semver"
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import {
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prefixRoleID,
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getRoleParams,
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DocumentType,
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SEPARATOR,
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doWithDB,
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} from "../db"
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import { getAppDB } from "../context"
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import {
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Screen,
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Role as RoleDoc,
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RoleUIMetadata,
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Database,
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App,
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BuiltinPermissionID,
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PermissionLevel,
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} from "@budibase/types"
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import cloneDeep from "lodash/fp/cloneDeep"
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import { RoleColor, helpers } from "@budibase/shared-core"
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import { uniqBy } from "lodash"
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import { default as env } from "../environment"
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export const BUILTIN_ROLE_IDS = {
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ADMIN: "ADMIN",
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POWER: "POWER",
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BASIC: "BASIC",
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PUBLIC: "PUBLIC",
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}
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const BUILTIN_IDS = {
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...BUILTIN_ROLE_IDS,
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BUILDER: "BUILDER",
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}
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export const RoleIDVersion = {
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// original version, with a UUID based ID
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UUID: undefined,
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// new version - with name based ID
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NAME: "name",
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}
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function rolesInList(roleIds: string[], ids: string | string[]) {
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if (Array.isArray(ids)) {
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return ids.filter(id => roleIds.includes(id)).length === ids.length
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} else {
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return roleIds.includes(ids)
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}
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}
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export class Role implements RoleDoc {
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_id: string
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_rev?: string
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name: string
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permissionId: BuiltinPermissionID
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inherits?: string | string[]
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version?: string
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permissions: Record<string, PermissionLevel[]> = {}
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uiMetadata?: RoleUIMetadata
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constructor(
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id: string,
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name: string,
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permissionId: BuiltinPermissionID,
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uiMetadata?: RoleUIMetadata
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) {
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this._id = id
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this.name = name
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this.uiMetadata = uiMetadata
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this.permissionId = permissionId
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// version for managing the ID - removing the role_ when responding
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this.version = RoleIDVersion.NAME
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}
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addInheritance(inherits?: string | string[]) {
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// make sure IDs are correct format
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if (inherits && typeof inherits === "string") {
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inherits = prefixRoleIDNoBuiltin(inherits)
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} else if (inherits && Array.isArray(inherits)) {
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inherits = inherits.map(prefixRoleIDNoBuiltin)
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}
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this.inherits = inherits
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return this
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}
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}
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export class RoleHierarchyTraversal {
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allRoles: RoleDoc[]
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opts?: { defaultPublic?: boolean }
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constructor(allRoles: RoleDoc[], opts?: { defaultPublic?: boolean }) {
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this.allRoles = allRoles
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this.opts = opts
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}
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walk(role: RoleDoc): RoleDoc[] {
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const opts = this.opts,
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allRoles = this.allRoles
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// this will be a full walked list of roles - which may contain duplicates
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let roleList: RoleDoc[] = []
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if (!role || !role._id) {
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return roleList
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}
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roleList.push(role)
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if (Array.isArray(role.inherits)) {
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for (let roleId of role.inherits) {
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const foundRole = findRole(roleId, allRoles, opts)
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if (foundRole) {
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roleList = roleList.concat(this.walk(foundRole))
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}
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}
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} else {
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const foundRoleIds: string[] = []
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let currentRole: RoleDoc | undefined = role
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while (
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currentRole &&
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currentRole.inherits &&
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!rolesInList(foundRoleIds, currentRole.inherits)
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) {
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if (Array.isArray(currentRole.inherits)) {
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return roleList.concat(this.walk(currentRole))
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} else {
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foundRoleIds.push(currentRole.inherits)
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currentRole = findRole(currentRole.inherits, allRoles, opts)
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if (currentRole) {
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roleList.push(currentRole)
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}
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}
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// loop now found - stop iterating
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if (helpers.roles.checkForRoleInheritanceLoops(roleList)) {
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break
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}
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}
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}
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return uniqBy(roleList, role => role._id)
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}
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}
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const BUILTIN_ROLES = {
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ADMIN: new Role(
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BUILTIN_IDS.ADMIN,
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BUILTIN_IDS.ADMIN,
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BuiltinPermissionID.ADMIN,
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{
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displayName: "App admin",
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description: "Can do everything",
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color: RoleColor.ADMIN,
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}
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).addInheritance(BUILTIN_IDS.POWER),
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POWER: new Role(
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BUILTIN_IDS.POWER,
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BUILTIN_IDS.POWER,
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BuiltinPermissionID.POWER,
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{
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displayName: "App power user",
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description: "An app user with more access",
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color: RoleColor.POWER,
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}
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).addInheritance(BUILTIN_IDS.BASIC),
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BASIC: new Role(
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BUILTIN_IDS.BASIC,
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BUILTIN_IDS.BASIC,
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BuiltinPermissionID.WRITE,
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{
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displayName: "App user",
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description: "Any logged in user",
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color: RoleColor.BASIC,
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}
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).addInheritance(BUILTIN_IDS.PUBLIC),
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PUBLIC: new Role(
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BUILTIN_IDS.PUBLIC,
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BUILTIN_IDS.PUBLIC,
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BuiltinPermissionID.PUBLIC,
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{
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displayName: "Public user",
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description: "Accessible to anyone",
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color: RoleColor.PUBLIC,
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}
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),
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BUILDER: new Role(
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BUILTIN_IDS.BUILDER,
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BUILTIN_IDS.BUILDER,
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BuiltinPermissionID.ADMIN,
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{
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displayName: "Builder user",
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description: "Users that can edit this app",
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color: RoleColor.BUILDER,
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}
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),
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}
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export function getBuiltinRoles(): { [key: string]: RoleDoc } {
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return cloneDeep(BUILTIN_ROLES)
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}
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export function isBuiltin(role: string) {
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return Object.values(BUILTIN_ROLE_IDS).includes(role)
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}
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export function prefixRoleIDNoBuiltin(roleId: string) {
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if (isBuiltin(roleId)) {
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return roleId
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} else {
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return prefixRoleID(roleId)
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}
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}
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export function getBuiltinRole(roleId: string): Role | undefined {
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const role = Object.values(BUILTIN_ROLES).find(role =>
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roleId.includes(role._id)
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)
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if (!role) {
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return undefined
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}
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return cloneDeep(role)
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}
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export function validInherits(
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allRoles: RoleDoc[],
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inherits?: string | string[]
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): boolean {
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if (!inherits) {
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return false
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}
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const find = (id: string) => allRoles.find(r => roleIDsAreEqual(r._id!, id))
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if (Array.isArray(inherits)) {
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const filtered = inherits.filter(roleId => find(roleId))
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return inherits.length !== 0 && filtered.length === inherits.length
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} else {
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return !!find(inherits)
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}
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}
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/**
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* Works through the inheritance ranks to see how far up the builtin stack this ID is.
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*/
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export function builtinRoleToNumber(id: string) {
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const builtins = getBuiltinRoles()
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const MAX = Object.values(builtins).length + 1
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if (
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roleIDsAreEqual(id, BUILTIN_IDS.ADMIN) ||
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roleIDsAreEqual(id, BUILTIN_IDS.BUILDER)
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) {
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return MAX
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}
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let role = builtins[id],
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count = 0
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do {
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if (!role) {
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break
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}
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if (Array.isArray(role.inherits)) {
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throw new Error("Built-in roles don't support multi-inheritance")
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} else {
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role = builtins[role.inherits!]
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}
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count++
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} while (role !== null)
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return count
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}
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/**
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* Converts any role to a number, but has to be async to get the roles from db.
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*/
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export async function roleToNumber(id: string) {
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if (isBuiltin(id)) {
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return builtinRoleToNumber(id)
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}
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const hierarchy = (await getUserRoleHierarchy(id, {
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defaultPublic: true,
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})) as RoleDoc[]
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const findNumber = (role: RoleDoc): number => {
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if (!role.inherits) {
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return 0
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}
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if (Array.isArray(role.inherits)) {
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// find the built-in roles, get their number, sort it, then get the last one
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const highestBuiltin: number | undefined = role.inherits
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.map(roleId => {
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const foundRole = hierarchy.find(role =>
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roleIDsAreEqual(role._id!, roleId)
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)
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if (foundRole) {
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return findNumber(foundRole) + 1
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}
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})
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.filter(number => number)
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.sort()
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.pop()
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if (highestBuiltin != undefined) {
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return highestBuiltin
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}
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} else if (isBuiltin(role.inherits)) {
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return builtinRoleToNumber(role.inherits) + 1
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}
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return 0
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}
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return Math.max(...hierarchy.map(findNumber))
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}
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/**
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* Returns whichever builtin roleID is lower.
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*/
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export function lowerBuiltinRoleID(roleId1?: string, roleId2?: string): string {
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if (!roleId1) {
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return roleId2 as string
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}
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if (!roleId2) {
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return roleId1 as string
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}
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return builtinRoleToNumber(roleId1) > builtinRoleToNumber(roleId2)
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? roleId2
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: roleId1
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}
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export function roleIDsAreEqual(roleId1: string, roleId2: string) {
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// make sure both role IDs are prefixed correctly
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return prefixRoleID(roleId1) === prefixRoleID(roleId2)
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}
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export function externalRole(role: RoleDoc): RoleDoc {
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let _id: string | undefined
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if (role._id) {
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_id = getExternalRoleID(role._id)
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}
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return {
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...role,
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_id,
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inherits: getExternalRoleIDs(role.inherits, role.version),
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}
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}
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/**
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* Given a list of roles, this will pick the role out, accounting for built ins.
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*/
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export function findRole(
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roleId: string,
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roles: RoleDoc[],
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opts?: { defaultPublic?: boolean }
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): RoleDoc | undefined {
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// built in roles mostly come from the in-code implementation,
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// but can be extended by a doc stored about them (e.g. permissions)
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let role: RoleDoc | undefined = getBuiltinRole(roleId)
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if (!role) {
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// make sure has the prefix (if it has it then it won't be added)
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roleId = prefixRoleID(roleId)
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}
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const dbRole = roles.find(
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role => role._id && roleIDsAreEqual(role._id, roleId)
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)
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if (!dbRole && !isBuiltin(roleId) && opts?.defaultPublic) {
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return cloneDeep(BUILTIN_ROLES.PUBLIC)
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}
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// combine the roles
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role = Object.assign(role || {}, dbRole)
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// finalise the ID
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if (role?._id) {
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role._id = getExternalRoleID(role._id, role.version)
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}
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return Object.keys(role).length === 0 ? undefined : role
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}
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/**
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* Gets the role object, this is mainly useful for two purposes, to check if the level exists and
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* to check if the role inherits any others.
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* @param roleId The level ID to lookup.
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* @param opts options for the function, like whether to halt errors, instead return public.
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* @returns The role object, which may contain an "inherits" property.
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*/
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export async function getRole(
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roleId: string,
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opts?: { defaultPublic?: boolean }
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): Promise<RoleDoc | undefined> {
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const db = getAppDB()
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const roleList = []
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if (!isBuiltin(roleId)) {
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const role = await db.tryGet<RoleDoc>(getDBRoleID(roleId))
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if (role) {
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roleList.push(role)
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}
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}
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return findRole(roleId, roleList, opts)
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}
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export async function saveRoles(roles: RoleDoc[]) {
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const db = getAppDB()
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await db.bulkDocs(
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roles
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.filter(role => role._id)
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.map(role => ({
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...role,
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_id: prefixRoleID(role._id!),
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}))
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)
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}
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/**
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* Simple function to get all the roles based on the top level user role ID.
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*/
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async function getAllUserRoles(
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userRoleId: string,
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opts?: { defaultPublic?: boolean }
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): Promise<RoleDoc[]> {
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const allRoles = await getAllRoles()
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// admins have access to all roles
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if (roleIDsAreEqual(userRoleId, BUILTIN_IDS.ADMIN)) {
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return allRoles
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}
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// get all the inherited roles
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const foundRole = findRole(userRoleId, allRoles, opts)
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let roles: RoleDoc[] = []
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if (foundRole) {
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const traversal = new RoleHierarchyTraversal(allRoles, opts)
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roles = traversal.walk(foundRole)
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}
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return roles
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}
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export async function getUserRoleIdHierarchy(
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userRoleId: string
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): Promise<string[]> {
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const roles = await getUserRoleHierarchy(userRoleId)
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return roles.map(role => role._id!)
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}
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/**
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* Returns an ordered array of the user's inherited role IDs, this can be used
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* to determine if a user can access something that requires a specific role.
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* @param userRoleId The user's role ID, this can be found in their access token.
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* @param opts optional - if want to default to public use this.
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* @returns returns an ordered array of the roles, with the first being their
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* highest level of access and the last being the lowest level.
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*/
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export async function getUserRoleHierarchy(
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userRoleId: string,
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opts?: { defaultPublic?: boolean }
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) {
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// special case, if they don't have a role then they are a public user
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return getAllUserRoles(userRoleId, opts)
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}
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// this function checks that the provided permissions are in an array format
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// some templates/older apps will use a simple string instead of array for roles
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// convert the string to an array using the theory that write is higher than read
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export function checkForRoleResourceArray(
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rolePerms: Record<string, PermissionLevel[]>,
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resourceId: string
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): Record<string, PermissionLevel[]> {
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if (rolePerms && !Array.isArray(rolePerms[resourceId])) {
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const permLevel = rolePerms[resourceId] as any
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rolePerms[resourceId] = [permLevel]
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if (permLevel === PermissionLevel.WRITE) {
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rolePerms[resourceId].push(PermissionLevel.READ)
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}
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}
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return rolePerms
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}
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export async function getAllRoleIds(appId: string): Promise<string[]> {
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const roles = await getAllRoles(appId)
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return roles.map(role => role._id!)
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}
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/**
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* Given an app ID this will retrieve all of the roles that are currently within that app.
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* @return An array of the role objects that were found.
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*/
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export async function getAllRoles(appId?: string): Promise<RoleDoc[]> {
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if (appId) {
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return doWithDB(appId, internal)
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} else {
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let appDB
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try {
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appDB = getAppDB()
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} catch (error) {
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// We don't have any apps, so we'll just use the built-in roles
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}
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return internal(appDB)
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}
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async function internal(db: Database | undefined) {
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let roles: RoleDoc[] = []
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if (db) {
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const body = await db.allDocs(
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getRoleParams(null, {
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include_docs: true,
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})
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)
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roles = body.rows.map((row: any) => row.doc)
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roles.forEach(
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role => (role._id = getExternalRoleID(role._id!, role.version))
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)
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}
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const builtinRoles = getBuiltinRoles()
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// exclude internal roles like builder
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let externalBuiltinRoles = []
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if (!db || (await shouldIncludePowerRole(db))) {
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externalBuiltinRoles = [
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BUILTIN_IDS.ADMIN,
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BUILTIN_IDS.POWER,
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BUILTIN_IDS.BASIC,
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BUILTIN_IDS.PUBLIC,
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]
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} else {
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externalBuiltinRoles = [
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BUILTIN_IDS.ADMIN,
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BUILTIN_IDS.BASIC,
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BUILTIN_IDS.PUBLIC,
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]
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}
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// need to combine builtin with any DB record of them (for sake of permissions)
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for (let builtinRoleId of externalBuiltinRoles) {
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const builtinRole = builtinRoles[builtinRoleId]
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const dbBuiltin = roles.filter(dbRole =>
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roleIDsAreEqual(dbRole._id!, builtinRoleId)
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)[0]
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if (dbBuiltin == null) {
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roles.push(builtinRole || builtinRoles.BASIC)
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} else {
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// remove role and all back after combining with the builtin
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roles = roles.filter(role => role._id !== dbBuiltin._id)
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dbBuiltin._id = getExternalRoleID(builtinRole._id!, dbBuiltin.version)
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roles.push({
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...builtinRole,
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...dbBuiltin,
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name: builtinRole.name,
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_id: getExternalRoleID(builtinRole._id!, builtinRole.version),
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})
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}
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}
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// check permissions
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for (let role of roles) {
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if (!role.permissions) {
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continue
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}
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for (let resourceId of Object.keys(role.permissions)) {
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role.permissions = checkForRoleResourceArray(
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role.permissions,
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resourceId
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)
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}
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}
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return roles
|
|
}
|
|
}
|
|
|
|
async function shouldIncludePowerRole(db: Database) {
|
|
const app = await db.tryGet<App>(DocumentType.APP_METADATA)
|
|
const creationVersion = app?.creationVersion
|
|
if (!creationVersion || !semver.valid(creationVersion)) {
|
|
// Old apps don't have creationVersion, so we should include it for backward compatibility
|
|
return true
|
|
}
|
|
|
|
const isGreaterThan3x = semver.gte(
|
|
creationVersion,
|
|
env.MIN_VERSION_WITHOUT_POWER_ROLE
|
|
)
|
|
return !isGreaterThan3x
|
|
}
|
|
|
|
export class AccessController {
|
|
userHierarchies: { [key: string]: string[] }
|
|
constructor() {
|
|
this.userHierarchies = {}
|
|
}
|
|
|
|
async hasAccess(tryingRoleId?: string, userRoleId?: string) {
|
|
// special cases, the screen has no role, the roles are the same or the user
|
|
// is currently in the builder
|
|
if (
|
|
tryingRoleId == null ||
|
|
tryingRoleId === "" ||
|
|
roleIDsAreEqual(tryingRoleId, BUILTIN_IDS.BUILDER) ||
|
|
roleIDsAreEqual(userRoleId!, tryingRoleId) ||
|
|
roleIDsAreEqual(userRoleId!, BUILTIN_IDS.BUILDER)
|
|
) {
|
|
return true
|
|
}
|
|
let roleIds = userRoleId ? this.userHierarchies[userRoleId] : null
|
|
if (!roleIds && userRoleId) {
|
|
roleIds = await getUserRoleIdHierarchy(userRoleId)
|
|
this.userHierarchies[userRoleId] = roleIds
|
|
}
|
|
|
|
return (
|
|
roleIds?.find(roleId => roleIDsAreEqual(roleId, tryingRoleId)) !==
|
|
undefined
|
|
)
|
|
}
|
|
|
|
async checkScreensAccess(screens: Screen[], userRoleId: string) {
|
|
let accessibleScreens = []
|
|
// don't want to handle this with Promise.all as this would mean all custom roles would be
|
|
// retrieved at same time, it is likely a custom role will be re-used and therefore want
|
|
// to work in sync for performance save
|
|
for (let screen of screens) {
|
|
const accessible = await this.checkScreenAccess(screen, userRoleId)
|
|
if (accessible) {
|
|
accessibleScreens.push(accessible)
|
|
}
|
|
}
|
|
return accessibleScreens
|
|
}
|
|
|
|
async checkScreenAccess(screen: Screen, userRoleId: string) {
|
|
const roleId = screen && screen.routing ? screen.routing.roleId : undefined
|
|
if (await this.hasAccess(roleId, userRoleId)) {
|
|
return screen
|
|
}
|
|
return null
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Adds the "role_" for builtin role IDs which are to be written to the DB (for permissions).
|
|
*/
|
|
export function getDBRoleID(roleName: string) {
|
|
if (roleName?.startsWith(DocumentType.ROLE)) {
|
|
return roleName
|
|
}
|
|
return prefixRoleID(roleName)
|
|
}
|
|
|
|
/**
|
|
* Remove the "role_" from builtin role IDs that have been written to the DB (for permissions).
|
|
*/
|
|
export function getExternalRoleID(roleId: string, version?: string) {
|
|
// for built-in roles we want to remove the DB role ID element (role_)
|
|
if (
|
|
roleId.startsWith(`${DocumentType.ROLE}${SEPARATOR}`) &&
|
|
(isBuiltin(roleId) || version === RoleIDVersion.NAME)
|
|
) {
|
|
const parts = roleId.split(SEPARATOR)
|
|
parts.shift()
|
|
return parts.join(SEPARATOR)
|
|
}
|
|
return roleId
|
|
}
|
|
|
|
export function getExternalRoleIDs(
|
|
roleIds: string | string[] | undefined,
|
|
version?: string
|
|
) {
|
|
if (!roleIds) {
|
|
return roleIds
|
|
} else if (typeof roleIds === "string") {
|
|
return getExternalRoleID(roleIds, version)
|
|
} else {
|
|
return roleIds.map(roleId => getExternalRoleID(roleId, version))
|
|
}
|
|
}
|