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profileLogic.ts
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124 lines (113 loc) · 4.5 KB
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import { NamedNode } from 'rdflib'
import { CrossOriginForbiddenError, FetchError, NotEditableError, SameOriginForbiddenError, UnauthorizedError, WebOperationError } from '../logic/CustomError'
import * as debug from '../util/debug'
import { ns as namespace } from '../util/ns'
import { differentOrigin, suggestPreferencesFile } from '../util/utils'
import { ProfileLogic } from '../types'
export function createProfileLogic(store, authn, utilityLogic): ProfileLogic {
const ns = namespace
/**
* loads the preference without throwing errors - if it can create it it does so.
* remark: it still throws error if it cannot load profile.
* @param user
* @returns undefined if preferenceFile cannot be returned or NamedNode if it can find it or create it
*/
async function silencedLoadPreferences(user: NamedNode): Promise <NamedNode | undefined> {
try {
return await loadPreferences(user)
} catch (err) {
return undefined
}
}
/**
* loads the preference without returning different errors if it cannot create or load it.
* remark: it also throws error if it cannot load profile.
* @param user
* @returns undefined if preferenceFile cannot be an Error or NamedNode if it can find it or create it
*/
async function loadPreferences (user: NamedNode): Promise <NamedNode> {
await loadProfile(user)
const possiblePreferencesFile = suggestPreferencesFile(user)
let preferencesFile
try {
preferencesFile = await utilityLogic.followOrCreateLink(user, ns.space('preferencesFile') as NamedNode, possiblePreferencesFile, user.doc())
} catch (err) {
const message = `User ${user} has no pointer in profile to preferences file.`
debug.warn(message)
// we are listing the possible errors
if (err instanceof NotEditableError) { throw err }
if (err instanceof WebOperationError) { throw err }
if (err instanceof UnauthorizedError) { throw err }
if (err instanceof CrossOriginForbiddenError) { throw err }
if (err instanceof SameOriginForbiddenError) { throw err }
if (err instanceof FetchError) { throw err }
throw err
}
try {
await store.fetcher.load(preferencesFile as NamedNode)
} catch (err) { // Maybe a permission problem or origin problem
const msg = `Unable to load preference of user ${user}: ${err}`
debug.warn(msg)
if (err.response.status === 401) {
throw new UnauthorizedError()
}
if (err.response.status === 403) {
if (differentOrigin(preferencesFile)) {
throw new CrossOriginForbiddenError()
}
throw new SameOriginForbiddenError()
}
/*if (err.response.status === 404) {
throw new NotFoundError();
}*/
throw new Error(msg)
}
return preferencesFile as NamedNode
}
async function loadProfile (user: NamedNode):Promise <NamedNode> {
if (!user) {
throw new Error('loadProfile: no user given.')
}
try {
await store.fetcher.load(user.doc())
} catch (err) {
throw new Error(`Unable to load profile of user ${user}: ${err}`)
}
return user.doc()
}
async function loadMe(): Promise<NamedNode> {
const me = authn.currentUser()
if (me === null) {
throw new Error('Current user not found! Not logged in?')
}
await store.fetcher.load(me.doc())
return me
}
function getPodRoot(user: NamedNode): NamedNode {
const podRoot = findStorage(user)
if (!podRoot) {
throw new Error('User pod root not found!')
}
return podRoot as NamedNode
}
async function getMainInbox(user: NamedNode): Promise<NamedNode> {
await store.fetcher.load(user)
const mainInbox = store.any(user, ns.ldp('inbox'), undefined, user.doc())
if (!mainInbox) {
throw new Error('User main inbox not found!')
}
return mainInbox as NamedNode
}
function findStorage(me: NamedNode) {
return store.any(me, ns.space('storage'), undefined, me.doc())
}
return {
loadMe,
getPodRoot,
getMainInbox,
findStorage,
loadPreferences,
loadProfile,
silencedLoadPreferences
}
}