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import { AbstractPowerSyncDatabase, Column, column, createBaseLogger, LogLevel, PowerSyncDatabase, Query, QueryResult, Schema, SyncStream, SyncStreamSubscription, Table, WASQLiteOpenFactory, WASQLiteVFS } from '@powersync/web';
import { SupabaseConnector } from './supabase-connector';
import { BehaviorSubject, filter, firstValueFrom, take } from 'rxjs';
import { Session } from '@supabase/supabase-js';
export const LISTS_TABLE = 'Lists';
export const CATEGORY_TABLE = 'Category';
export const ITEM_TABLE = 'Item';
export const FAVORITES_TABLE = 'Favorites';
export const USER_LISTS_TABLE = 'UserLists';
export const LIST_ITEMS_TABLE = 'ListItem';
const Category = new Table(
{
created_at: column.text,
name: column.text
},
{ indexes: { cid_idx: ["id"]} }
);
const Item = new Table(
{
created_at: column.text,
name: column.text,
category: column.integer,
content: column.integer,
description: column.text,
global: column.integer,
user: column.text
},
{ indexes: { iid_idx: ["id"] } }
);
const Favorites = new Table(
{
created_at: column.text,
user: column.text,
item: column.integer
},
{ indexes: { fid_idx: ["id"] } }
);
const UserLists = new Table(
{
created_at: column.text,
user: column.text,
list: column.integer
},
{ indexes: { user_list_idx: ["user", "list"] } }
);
const Lists = new Table(
{
created_at: column.text,
name: column.text,
description: column.text
},
{ indexes: { lists_idx: ["id"] } }
);
const ListItem = new Table(
{
liste: column.integer,
item: column.integer,
created_at: column.text,
updated_at: column.text,
curr_amount: column.integer,
target_amount: column.integer,
amount_unit: column.text
},
{ indexes: { liste_item_idx: ["liste", "item"] } }
);
export const publicSchema = new Schema({
Category,
Item,
Favorites,
UserLists,
Lists,
ListItem
});
export const USER_ID_PLACEHOLDER = '__USER_ID__';
export interface USER_LIST_ID_PLACEHOLDER {
user: string,
list: bigint
};
@Injectable({
providedIn: 'root'
})
export class PowerSyncService {
db: AbstractPowerSyncDatabase;
currentUserId!: string;
private isReady$ = new BehaviorSubject<boolean>(false);
public ready$ = this.isReady$.asObservable();
public readonly error = signal<boolean>(false);
private authWatcherEnabled = false;
private readonly isCypressRun = typeof window !== 'undefined' && !!(window as any).Cypress;
private dbConnected = false;
private subscribed = false;
private syncStreamNames = ['watch_lists', 'watch_categories', "watch_items"];
private syncStreams: SyncStreamSubscription[] = []
private connector: SupabaseConnector | null = null;
constructor() {
const cypressFlags = this.isCypressRun ? { enableMultiTabs: false } : undefined;
const factory = new WASQLiteOpenFactory({
dbFilename: 'app_v6.db',
vfs: this.isCypressRun ? WASQLiteVFS.IDBBatchAtomicVFS : WASQLiteVFS.OPFSCoopSyncVFS,
...(cypressFlags ? { flags: cypressFlags } : {}),
// Specify the path to the worker script
worker: '@powersync/worker/WASQLiteDB.umd.js'
});
this.db = new PowerSyncDatabase({
schema: publicSchema,
database: factory,
...(cypressFlags ? { flags: cypressFlags } : {}),
sync: {
// Specify the path to the worker script
worker: '@powersync/worker/SharedSyncImplementation.umd.js'
}
});
Eif (typeof window !== 'undefined') {
(window as any).powerSync = this.db;
}
this.currentUserId = this.getOrCreateUserId();
}
execute(sql: string, parameters: unknown[] = []): Promise<QueryResult> {
const injectedParameters = parameters.map(param => {
if (param === USER_ID_PLACEHOLDER) {
return this.currentUserId;
E} else if (typeof param === 'object' && param !== null && 'user' in param && 'list' in param) {
const placeholder = param as USER_LIST_ID_PLACEHOLDER;
Eif (placeholder.user === USER_ID_PLACEHOLDER) {
return `${this.currentUserId}|${placeholder.list}`;
}
return `${placeholder.user}|${placeholder.list}`;
}
return param;
});
return this.db.execute(sql, injectedParameters);
}
get<T>(sql: string, parameters: unknown[] = []): Promise<T> {
const injectedParameters = parameters.map(param => param === USER_ID_PLACEHOLDER ? this.currentUserId : param);
return this.db.get<T>(sql, injectedParameters);
}
watch(sql: string, parameters: unknown[] = []): AsyncIterable<QueryResult> {
const injectedParameters = parameters.map(param => param === USER_ID_PLACEHOLDER ? this.currentUserId : param);
return this.db.watch(sql, injectedParameters);
}
query<T>(sql: string, parameters: unknown[] = []): Query<T> {
const injectedParameters: string[] = parameters.map(param => param === USER_ID_PLACEHOLDER ? this.currentUserId : String(param));
return this.db.query<T>({sql, parameters: injectedParameters});
}
watchWithCallback(sql: string, callback: (result: QueryResult) => void, parameters: unknown[] = []) {
const injectedParameters = parameters.map(param => param === USER_ID_PLACEHOLDER ? this.currentUserId : param);
const controller = new AbortController();
this.db.watchWithCallback(
sql,
injectedParameters,
{
onResult: callback,
onError: (error) => console.error('Watch error:', error)
},
{
signal: controller.signal
}
);
return () => controller.abort();
}
getOrCreateUserId(): string {
const localStorageKey = 'nimmit_user_id';
let userId = localStorage.getItem(localStorageKey);
Eif (!userId) {
userId = crypto.randomUUID();
localStorage.setItem(localStorageKey, userId);
}
return userId;
}
async subscibeAllSyncStreams() {
Eif (this.subscribed) return;
for (const streamName of this.syncStreamNames) {
const sub = await this.db.syncStream(streamName).subscribe();
this.syncStreams.push(sub);
}
this.subscribed = true;
}
async unsubscribeAllSyncStreams() {
Eif (!this.subscribed) return;
for (const sub of this.syncStreams) {
sub.unsubscribe();
this.syncStreams = this.syncStreams.filter(s => s !== sub);
}
this.subscribed = false;
}
async migrateUserIid(oldId: string, newId: string) {
const criticalTables = ["Item", "Favorites", "UserLists"];
for (const table of criticalTables) {
const updateColumn = "user";
const sql = `
UPDATE ${table} set ${updateColumn} = ?
Where ${updateColumn} = ?
`;
await this.db.execute(sql, [newId, oldId]);
}
}
async connectDb(session: Session | null) {
Eif (this.dbConnected) return;
Eif (!this.connector) {
console.warn('Attempted to connect Supabase database without a connector - aborting connection.');
return;
}
Eif (!session) {
// eslint-disable-next-line no-param-reassign
session = await this.connector.getSession();
Eif (!session) {
console.warn('No active session found for PowerSync database connection - aborting connection.');
return;
}
}
Eif (this.currentUserId !== session.user.id) {
const previousUserId = this.currentUserId;
await this.migrateUserIid(previousUserId, session.user.id);
this.currentUserId = session.user.id;
}
await this.db.connect(this.connector);
await this.subscibeAllSyncStreams();
this.dbConnected = true;
void this.db.waitForFirstSync().catch((error) => {
console.error('PowerSync first sync failed:', error);
});
}
async disconnectDb() {
Eif (!this.dbConnected) return;
await this.db.disconnect();
await this.unsubscribeAllSyncStreams();
this.dbConnected = false;
}
async waitForPowerSyncReady(): Promise<void> {
await firstValueFrom(
this.ready$.pipe(
filter((isReady) => isReady),
take(1)
)
);
}
toggleSignInWatcher() {
Eif (!this.connector) {
console.warn('Attempted to toggle PowerSync database connection without a connector - aborting.');
return;
}
Eif (this.authWatcherEnabled) {
return;
}
this.authWatcherEnabled = true;
this.connector.client.auth.onAuthStateChange(async (event, session) => {
if (event === "SIGNED_IN") {
Eif (!this.dbConnected) {
if (session) {
this.isReady$.next(false);
await this.connectDb(session);
this.isReady$.next(true);
} else {
console.warn('Received SIGNED_IN event without a session - cannot connect to database.');
}
}
E} else if (event === "SIGNED_OUT") {
this.isReady$.next(false);
await this.disconnectDb();
this.currentUserId = this.getOrCreateUserId();
this.isReady$.next(true);
}
});
}
setupPowerSync = async (connector: SupabaseConnector | null) => {
try {
await this.db.init();
if (connector) {
this.connector = connector;
this.toggleSignInWatcher();
const session = await connector.getSession();
Eif (!session) {
console.warn('No active session found for PowerSync setup - database will operate in offline mode only with local user ID: ', this.currentUserId);
this.isReady$.next(true);
return;
}
this.currentUserId = session.user.id;
// Cypress E2E runs use a mocked Supabase session. Avoid connecting to the real
// PowerSync backend, as it would require a valid access token and can hang/flap in CI.
Eif (this.isCypressRun) {
this.isReady$.next(true);
return;
}
Eif (navigator.onLine) {
await this.connectDb(session);
}
console.log('PowerSync setup complete with user ID:', this.currentUserId);
this.isReady$.next(true);
} else {
console.warn('PowerSync setup called without a connector - database will operate in offline mode only with local user ID: ', this.currentUserId);
this.toggleSignInWatcher();
this.isReady$.next(true);
}
} catch (e) {
console.error('Error during PowerSync setup:', e);
this.isReady$.next(true);
this.error.set(true);
}
};
} |