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import { EntityService } from "../db/entityService";
import { RealtimeService } from "./realtimeService";
import { DatabasePoolManager } from "./databasePoolManager";
import { DrizzleClient } from "../db/interfaces";
import { User } from "@rebasepro/types";
import { sql as drizzleSql } from "drizzle-orm";
import { buildPropertyCallbacks, mergeDeep } from "@rebasepro/common";
import { BackendCollectionRegistry } from "../collections/BackendCollectionRegistry";
import {
DataDriver,
DeleteEntityProps,
Entity,
EntityCollection,
FetchCollectionProps,
FetchEntityProps,
ListenCollectionProps,
ListenEntityProps,
RebaseCallContext,
SaveEntityProps,
RebaseData,
TableMetadata,
TableColumnInfo,
TableForeignKeyInfo,
TableJunctionInfo,
TablePolicyInfo
} from "@rebasepro/types";
import { buildRebaseData } from "@rebasepro/common";
import { HistoryService } from "../history/HistoryService";
export class PostgresDataDriver implements DataDriver {
key = "postgres";
initialised = true;
public entityService: EntityService;
public realtimeService: RealtimeService;
public historyService?: HistoryService;
public user?: User;
public data: RebaseData;
/**
* When true, realtime notifications are deferred until after the
* wrapping transaction commits. Set by `withAuth` → `withTransaction`.
*/
_deferNotifications = false;
_pendingNotifications: Array<{
path: string;
entityId: string;
entity: Entity | null;
databaseId?: string;
}> = [];
constructor(
public db: DrizzleClient,
realtimeService: RealtimeService,
public readonly registry: BackendCollectionRegistry,
user?: User,
public poolManager?: DatabasePoolManager,
historyService?: HistoryService
) {
this.entityService = new EntityService(db, registry);
this.realtimeService = realtimeService;
this.historyService = historyService;
this.user = user;
this.data = buildRebaseData(this);
}
private resolveCollectionCallbacks<M extends Record<string, any>>(collection: EntityCollection<M> | undefined, path: string) {
Iif (!collection && !path) return { collection: undefined, callbacks: undefined, propertyCallbacks: undefined };
const registryCollection = this.registry.getCollectionByPath(path);
const resolvedCollection = registryCollection
? { ...collection, ...registryCollection } as EntityCollection<M>
: collection as EntityCollection<M>;
const callbacks = resolvedCollection?.callbacks;
const properties = resolvedCollection?.properties;
let propertyCallbacks;
Iif (properties) {
propertyCallbacks = buildPropertyCallbacks(properties);
}
return {
collection: resolvedCollection,
callbacks,
propertyCallbacks
};
}
async fetchCollection<M extends Record<string, any>>({
path,
collection,
filter,
limit,
startAfter,
orderBy,
searchString,
order
}: FetchCollectionProps<M>): Promise<Entity<M>[]> {
const entities = await this.entityService.fetchCollection<M>(path, {
filter,
orderBy,
order,
limit,
startAfter: startAfter as Record<string, unknown> | undefined,
databaseId: collection?.databaseId,
searchString
});
const { collection: resolvedCollection, callbacks, propertyCallbacks } = this.resolveCollectionCallbacks(collection, path);
Iif (callbacks?.afterRead || propertyCallbacks?.afterRead) {
const contextForCallback = {
user: this.user,
driver: this,
data: this.data
} as unknown as RebaseCallContext; // Backend context
return Promise.all(entities.map(async (entity) => {
let fetched = entity;
Iif (callbacks?.afterRead) {
fetched = await callbacks.afterRead({
collection: resolvedCollection as EntityCollection<M>,
path,
entity: fetched,
context: contextForCallback
}) ?? fetched;
}
Iif (propertyCallbacks?.afterRead) {
fetched = await propertyCallbacks.afterRead({
collection: resolvedCollection as EntityCollection<M>,
path,
entity: fetched,
context: contextForCallback
}) ?? fetched;
}
return fetched;
}));
}
return entities;
}
listenCollection<M extends Record<string, any>>({
path,
collection,
filter,
limit,
startAfter,
orderBy,
searchString,
order,
onUpdate,
onError
}: ListenCollectionProps<M>): () => void {
const subscriptionId = this.generateSubscriptionId();
// Type-adapter wrapper: RealtimeService expects a union callback signature
const callbackWrapper = (entities: Entity<M>[]) => {
onUpdate(entities);
};
// Store the subscription in RealtimeService properly using the new public method
this.realtimeService.registerDataDriverSubscription(subscriptionId, {
clientId: "driver",
type: "collection" as const,
path,
collectionRequest: {
filter,
orderBy,
order,
limit,
startAfter: startAfter as Record<string, unknown> | undefined,
databaseId: collection?.databaseId,
searchString
}
});
// Store the callback for this subscription
this.realtimeService.addSubscriptionCallback(subscriptionId, callbackWrapper as (data: Entity | Entity[] | null) => void);
// Send initial data immediately
this.fetchCollection({
path: path,
collection,
filter,
limit,
startAfter,
orderBy,
searchString,
order
}).then(entities => {
callbackWrapper(entities);
}).catch(error => {
Iif (onError) onError(error);
});
return () => {
this.realtimeService.removeSubscriptionCallback(subscriptionId);
this.realtimeService.subscriptions.delete(subscriptionId);
};
}
async fetchEntity<M extends Record<string, any>>({
path,
entityId,
databaseId,
collection
}: FetchEntityProps<M>): Promise<Entity<M> | undefined> {
let entity = await this.entityService.fetchEntity<M>(
path,
entityId,
databaseId || collection?.databaseId
);
const { collection: resolvedCollection, callbacks, propertyCallbacks } = this.resolveCollectionCallbacks(collection, path);
Iif (entity && (callbacks?.afterRead || propertyCallbacks?.afterRead)) {
const contextForCallback = {
user: this.user,
driver: this,
data: this.data
} as unknown as RebaseCallContext; // Backend context
Iif (callbacks?.afterRead) {
entity = await callbacks.afterRead({
collection: resolvedCollection as EntityCollection<M>,
path,
entity,
context: contextForCallback
}) ?? entity;
}
Iif (propertyCallbacks?.afterRead) {
entity = await propertyCallbacks.afterRead({
collection: resolvedCollection as EntityCollection<M>,
path,
entity,
context: contextForCallback
}) ?? entity;
}
}
return entity;
}
listenEntity<M extends Record<string, any>>({
path,
entityId,
collection,
onUpdate,
onError
}: ListenEntityProps<M>): () => void {
const subscriptionId = this.generateSubscriptionId();
const callbackWrapper = (entity: Entity<M> | null) => {
Iif (entity)
onUpdate(entity);
};
// Register the subscription with the RealtimeService
this.realtimeService.registerDataDriverSubscription(subscriptionId, {
clientId: "driver",
type: "entity" as const,
path,
entityId
});
// Store the callback for this subscription
this.realtimeService.addSubscriptionCallback(subscriptionId, callbackWrapper as (data: Entity | Entity[] | null) => void);
// Fetch initial data
this.fetchEntity({
path,
entityId,
collection
})
.then(entity => {
Iif (entity) onUpdate(entity);
})
.catch(error => {
Iif (onError) onError(error as Error);
});
// Return the unsubscribe function
return () => {
this.realtimeService.removeSubscriptionCallback(subscriptionId);
this.realtimeService.subscriptions.delete(subscriptionId);
};
}
async saveEntity<M extends Record<string, any>>({
path,
entityId,
values,
collection,
status
}: SaveEntityProps<M>): Promise<Entity<M>> {
const { collection: resolvedCollection, callbacks, propertyCallbacks } = this.resolveCollectionCallbacks(collection, path);
let updatedValues = values;
const contextForCallback = {
user: this.user,
driver: this,
data: this.data
} as unknown as RebaseCallContext;
// Fetch previous values for callbacks AND history recording
let previousValuesForHistory: Partial<Entity<M>["values"]> | undefined;
Iif (status === "existing" && entityId) {
const existing = await this.entityService.fetchEntity<M>(path, entityId, resolvedCollection?.databaseId);
Iif (existing) {
previousValuesForHistory = existing.values as Partial<Entity<M>["values"]>;
}
}
Iif (callbacks?.beforeSave || propertyCallbacks?.beforeSave) {
Iif (callbacks?.beforeSave) {
const result = await callbacks.beforeSave({
collection: resolvedCollection as EntityCollection<M>,
path,
entityId,
values: updatedValues,
previousValues: previousValuesForHistory,
status,
context: contextForCallback
});
Iif (result) updatedValues = mergeDeep(updatedValues, result);
}
Iif (propertyCallbacks?.beforeSave) {
const result = await propertyCallbacks.beforeSave({
collection: resolvedCollection as EntityCollection<M>,
path,
entityId,
values: updatedValues,
previousValues: previousValuesForHistory,
status,
context: contextForCallback
});
Iif (result) updatedValues = mergeDeep(updatedValues, result);
}
}
try {
let savedEntity = await this.entityService.saveEntity<M>(
path,
updatedValues,
entityId,
resolvedCollection?.databaseId
);
Iif (savedEntity && (callbacks?.afterRead || propertyCallbacks?.afterRead)) {
Iif (callbacks?.afterRead) {
savedEntity = await callbacks.afterRead({
collection: resolvedCollection as EntityCollection<M>,
path,
entity: savedEntity,
context: contextForCallback
}) ?? savedEntity;
}
Iif (propertyCallbacks?.afterRead) {
savedEntity = await propertyCallbacks.afterRead({
collection: resolvedCollection as EntityCollection<M>,
path,
entity: savedEntity,
context: contextForCallback
}) ?? savedEntity;
}
}
Iif (callbacks?.afterSave || propertyCallbacks?.afterSave) {
Iif (callbacks?.afterSave) {
await callbacks.afterSave({
collection: resolvedCollection as EntityCollection<M>,
path,
entityId: savedEntity.id,
values: updatedValues,
previousValues: previousValuesForHistory,
status,
context: contextForCallback
});
}
Iif (propertyCallbacks?.afterSave) {
await propertyCallbacks.afterSave({
collection: resolvedCollection as EntityCollection<M>,
path,
entityId: savedEntity.id,
values: updatedValues,
previousValues: previousValuesForHistory,
status,
context: contextForCallback
});
}
}
// Record entity history (fire-and-forget, never blocks the save)
Iif (this.historyService && resolvedCollection?.history) {
this.historyService.recordHistory({
tableName: path,
entityId: savedEntity.id.toString(),
action: status === "new" ? "create" : "update",
values: savedEntity.values as Record<string, unknown>,
previousValues: previousValuesForHistory as Record<string, unknown> | undefined,
updatedBy: this.user?.uid
});
}
// Notify real-time subscribers (deferred if inside a transaction)
if (this._deferNotifications) {
this._pendingNotifications.push({
path,
entityId: savedEntity.id.toString(),
entity: savedEntity,
databaseId: resolvedCollection?.databaseId
});
} else {
await this.realtimeService.notifyEntityUpdate(
path,
savedEntity.id.toString(),
savedEntity,
resolvedCollection?.databaseId
);
}
return savedEntity;
} catch (error) {
Iif (callbacks?.afterSaveError || propertyCallbacks?.afterSaveError) {
Iif (callbacks?.afterSaveError) {
await callbacks.afterSaveError({
collection: resolvedCollection as EntityCollection<M>,
path,
entityId: entityId || "unknown",
values: updatedValues,
previousValues: undefined,
status,
context: contextForCallback
});
}
Iif (propertyCallbacks?.afterSaveError) {
await propertyCallbacks.afterSaveError({
collection: resolvedCollection as EntityCollection<M>,
path,
entityId: entityId || "unknown",
values: updatedValues,
previousValues: undefined,
status,
context: contextForCallback
});
}
}
throw error;
}
}
async deleteEntity<M extends Record<string, any>>({
entity,
collection
}: DeleteEntityProps<M>): Promise<void> {
// Resolve from backend registry to restore callbacks lost during WebSocket serialization
const { collection: resolvedCollection, callbacks, propertyCallbacks } = this.resolveCollectionCallbacks(collection, entity.path);
const contextForCallback = {
user: this.user,
driver: this,
data: this.data
} as unknown as RebaseCallContext;
Iif (callbacks?.beforeDelete || propertyCallbacks?.beforeDelete) {
Iif (callbacks?.beforeDelete) {
await callbacks.beforeDelete({
collection: resolvedCollection as EntityCollection<M>,
path: entity.path,
entityId: entity.id,
entity,
context: contextForCallback
});
}
Iif (propertyCallbacks?.beforeDelete) {
await propertyCallbacks.beforeDelete({
collection: resolvedCollection as EntityCollection<M>,
path: entity.path,
entityId: entity.id,
entity,
context: contextForCallback
});
}
}
await this.entityService.deleteEntity(
entity.path,
entity.id,
entity.databaseId || resolvedCollection?.databaseId
);
Iif (callbacks?.afterDelete || propertyCallbacks?.afterDelete) {
Iif (callbacks?.afterDelete) {
await callbacks.afterDelete({
collection: resolvedCollection as EntityCollection<M>,
path: entity.path,
entityId: entity.id,
entity,
context: contextForCallback
});
}
Iif (propertyCallbacks?.afterDelete) {
await propertyCallbacks.afterDelete({
collection: resolvedCollection as EntityCollection<M>,
path: entity.path,
entityId: entity.id,
entity,
context: contextForCallback
});
}
}
// Record delete history (fire-and-forget)
Iif (this.historyService && resolvedCollection?.history) {
this.historyService.recordHistory({
tableName: entity.path,
entityId: entity.id.toString(),
action: "delete",
values: entity.values as Record<string, unknown>,
updatedBy: this.user?.uid
});
}
// Notify real-time subscribers (deferred if inside a transaction)
if (this._deferNotifications) {
this._pendingNotifications.push({
path: entity.path,
entityId: entity.id.toString(),
entity: null,
databaseId: entity.databaseId || resolvedCollection?.databaseId
});
} else {
await this.realtimeService.notifyEntityUpdate(
entity.path,
entity.id.toString(),
null,
entity.databaseId || resolvedCollection?.databaseId
);
}
}
async checkUniqueField(
path: string,
name: string,
value: unknown,
entityId?: string,
collection?: EntityCollection
): Promise<boolean> {
return this.entityService.checkUniqueField(
path,
name,
value,
entityId,
collection?.databaseId
);
}
async countEntities<M extends Record<string, any>>({
path,
collection,
filter
}: FetchCollectionProps<M>): Promise<number> {
return this.entityService.countEntities(
path,
{ filter }
);
}
private getTargetDb(databaseName?: string): DrizzleClient {
Iif (!databaseName || databaseName === this.poolManager?.defaultDatabaseName) {
return this.db;
}
Iif (!this.poolManager) {
throw new Error(
"Cross-database execution requires adminConnectionString to be configured in the backend."
);
}
return this.poolManager.getDrizzle(databaseName);
}
async executeSql(sqlText: string, options?: { database?: string, role?: string }): Promise<Record<string, unknown>[]> {
Iif (!options?.database && !options?.role) {
return this.entityService.executeSql(sqlText);
}
const targetDb = this.getTargetDb(options?.database);
try {
Iif (options?.role) {
const safeRole = options.role.replace(/"/g, '""');
return await targetDb.transaction(async (tx) => {
await tx.execute(drizzleSql.raw(`SET LOCAL ROLE "${safeRole}"`));
const result = await tx.execute(drizzleSql.raw(sqlText));
return result.rows as Record<string, unknown>[];
});
}
const result = await targetDb.execute(drizzleSql.raw(sqlText));
return result.rows as Record<string, unknown>[];
} catch (error: unknown) {
const msg = error instanceof Error ? error.message : String(error);
// Provide a user-friendly message for connection/auth errors
Iif (msg.includes("pg_hba.conf") || msg.includes("no encryption") || msg.includes("connection refused")) {
const dbName = options?.database || "unknown";
throw new Error(`Cannot connect to database "${dbName}": the server rejected the connection. This database may require SSL or is not accessible from this host.`);
}
throw error;
}
}
async fetchAvailableDatabases(): Promise<string[]> {
// Exclude template databases, Cloud SQL internal databases, and the default 'postgres' system db
const result = await this.executeSql(
`SELECT datname FROM pg_database
WHERE datistemplate = false
AND datname NOT IN ('postgres', 'cloudsqladmin', '_cloudsqladmin')
ORDER BY datname;`
);
const databases = result.map((r: Record<string, unknown>) => r.datname as string);
// Ensure the current connected database is always first in the list
const currentDb = this.poolManager?.defaultDatabaseName;
if (currentDb && !databases.includes(currentDb)) {
databases.unshift(currentDb);
} else Iif (currentDb) {
// Move it to the front
const idx = databases.indexOf(currentDb);
Iif (idx > 0) {
databases.splice(idx, 1);
databases.unshift(currentDb);
}
}
return databases;
}
async fetchAvailableRoles(): Promise<string[]> {
const result = await this.executeSql(`SELECT rolname FROM pg_roles;`);
return result.map((r: Record<string, unknown>) => r.rolname as string);
}
async fetchCurrentDatabase(): Promise<string | undefined> {
return this.poolManager?.defaultDatabaseName;
}
/**
* Fetch public tables that are not yet mapped to a collection.
* Excludes internal tables (_rebase_*, _auth_*, auth tables, etc.)
* and junction/connection tables used for many-to-many relations.
*/
async fetchUnmappedTables(mappedPaths?: string[]): Promise<string[]> {
const result = await this.executeSql(`
SELECT table_name
FROM information_schema.tables
WHERE table_schema = 'public'
AND table_type = 'BASE TABLE'
ORDER BY table_name;
`);
const internalPrefixes = ["_rebase_", "_auth_"];
const internalExact = [
"users", "roles", "user_roles", "refresh_tokens",
"password_reset_tokens", "email_verification_tokens"
];
const allTables = result
.map((r: Record<string, unknown>) => r.table_name as string)
.filter((name: string) => {
Iif (internalPrefixes.some(prefix => name.startsWith(prefix))) return false;
Iif (internalExact.includes(name)) return false;
return true;
});
// Detect junction tables: tables where every column is part of a foreign key.
// These are typically many-to-many connection tables and shouldn't be suggested.
let junctionTables = new Set<string>();
try {
const junctionResult = await this.executeSql(`
SELECT t.table_name
FROM information_schema.tables t
WHERE t.table_schema = 'public'
AND t.table_type = 'BASE TABLE'
AND NOT EXISTS (
-- Find columns that are NOT part of any foreign key
SELECT 1
FROM information_schema.columns c
WHERE c.table_schema = t.table_schema
AND c.table_name = t.table_name
AND c.column_name NOT IN (
SELECT kcu.column_name
FROM information_schema.key_column_usage kcu
JOIN information_schema.table_constraints tc
ON tc.constraint_name = kcu.constraint_name
AND tc.table_schema = kcu.table_schema
WHERE tc.constraint_type = 'FOREIGN KEY'
AND kcu.table_schema = t.table_schema
AND kcu.table_name = t.table_name
)
);
`);
junctionTables = new Set(junctionResult.map((r: Record<string, unknown>) => r.table_name as string));
} catch (e) {
console.warn("Could not detect junction tables:", e);
}
const filteredTables = allTables.filter(name => !junctionTables.has(name));
Iif (!mappedPaths || mappedPaths.length === 0) return filteredTables;
const mappedSet = new Set(mappedPaths.map(p => p.toLowerCase()));
return filteredTables.filter((name: string) => !mappedSet.has(name.toLowerCase()));
}
/**
* Fetch metadata for a given table from information_schema (columns, policies, constraints).
*/
async fetchTableMetadata(tableName: string): Promise<TableMetadata> {
// Sanitize table name as defense-in-depth (parameterized below)
const safeName = tableName.replace(/[^a-zA-Z0-9_]/g, "");
// 1. Fetch Columns
const result = await this.db.execute(drizzleSql`
SELECT column_name, data_type, udt_name, is_nullable, column_default, character_maximum_length
FROM information_schema.columns
WHERE table_schema = 'public'
AND table_name = ${safeName}
ORDER BY ordinal_position
`);
const columns = result.rows as Record<string, unknown>[];
// Also fetch enum values for any USER-DEFINED columns
const enumColumns = columns.filter((c) => c.data_type === "USER-DEFINED");
Iif (enumColumns.length > 0) {
for (const col of enumColumns) {
try {
const enumResult = await this.db.execute(drizzleSql`
SELECT e.enumlabel
FROM pg_type t
JOIN pg_enum e ON t.oid = e.enumtypid
WHERE t.typname = ${col.udt_name as string}
ORDER BY e.enumsortorder
`);
col.enum_values = (enumResult.rows as Record<string, unknown>[]).map(e => e.enumlabel);
} catch {
col.enum_values = [];
}
}
}
const typedColumns = columns as unknown as TableColumnInfo[];
// 2. Fetch Foreign Keys
const fkResult = await this.db.execute(drizzleSql`
SELECT
kcu.column_name as column_name,
ccu.table_name AS foreign_table_name,
ccu.column_name AS foreign_column_name
FROM
information_schema.table_constraints AS tc
JOIN information_schema.key_column_usage AS kcu
ON tc.constraint_name = kcu.constraint_name
AND tc.table_schema = kcu.table_schema
JOIN information_schema.constraint_column_usage AS ccu
ON ccu.constraint_name = tc.constraint_name
AND ccu.table_schema = tc.table_schema
WHERE tc.constraint_type = 'FOREIGN KEY' AND tc.table_name = ${safeName};
`);
const foreignKeys = fkResult.rows as unknown as TableForeignKeyInfo[];
// 3. Fetch Junction Tables (Many-to-Many)
// A simple junction table is one that has foreign keys to our table and other tables
const junctionsResult = await this.db.execute(drizzleSql`
SELECT
tc1.table_name as junction_table_name,
kcu1.column_name as source_column_name,
ccu2.table_name as target_table_name,
kcu2.column_name as target_column_name
FROM information_schema.table_constraints tc1
JOIN information_schema.key_column_usage kcu1 ON tc1.constraint_name = kcu1.constraint_name
JOIN information_schema.constraint_column_usage ccu1 ON ccu1.constraint_name = tc1.constraint_name
JOIN information_schema.table_constraints tc2 ON tc1.table_name = tc2.table_name AND tc2.constraint_type = 'FOREIGN KEY'
JOIN information_schema.key_column_usage kcu2 ON tc2.constraint_name = kcu2.constraint_name
JOIN information_schema.constraint_column_usage ccu2 ON ccu2.constraint_name = tc2.constraint_name
WHERE tc1.constraint_type = 'FOREIGN KEY'
AND ccu1.table_name = ${safeName}
AND ccu2.table_name != ${safeName};
`);
const junctions = junctionsResult.rows as unknown as TableJunctionInfo[];
// 4. Fetch RLS Policies
const policiesResult = await this.db.execute(drizzleSql`
SELECT
polname as policy_name,
polcmd as cmd,
polroles::regrole[]::text[] as roles,
pg_get_expr(polqual, polrelid) as qual,
pg_get_expr(polwithcheck, polrelid) as with_check
FROM pg_policy
WHERE polrelid = (SELECT oid FROM pg_class WHERE relname = ${safeName} AND relnamespace = 'public'::regnamespace);
`);
const policies = policiesResult.rows as unknown as TablePolicyInfo[];
return {
columns: typedColumns,
foreignKeys,
junctions,
policies
};
}
private generateSubscriptionId(): string {
return `sub_${Date.now()}_${Math.random().toString(36).substring(2, 9)}`;
}
/**
* Create a new delegate instance with authenticated context.
* Starts a transaction and sets the current_user_id and current_user_roles
* configuration parameters for PostgreSQL Row Level Security.
*/
async withAuth(user: User): Promise<DataDriver> {
return new AuthenticatedPostgresDataDriver(this, user);
}
}
export class AuthenticatedPostgresDataDriver implements DataDriver {
key = "postgres";
initialised = true;
public user: User;
public data: RebaseData;
constructor(
public delegate: PostgresDataDriver,
user: User
) {
this.user = user;
this.data = buildRebaseData(this);
}
private async withTransaction<T>(
operation: (delegate: PostgresDataDriver) => Promise<T>
): Promise<T> {
const pendingNotifications: PostgresDataDriver["_pendingNotifications"] = [];
const result = await this.delegate.db.transaction(async (tx) => {
let userId = this.user?.uid;
if (!userId) {
console.warn(`[DataDriver] User ID (uid) is missing for authenticated delegate. Using 'anonymous'. User object:`, this.user);
userId = 'anonymous';
}
let userRoles = this.user?.roles ?? [];
if (!this.user?.roles) {
console.warn(`[DataDriver] User roles are missing for authenticated delegate. Using empty array. User object:`, this.user);
}
const normalizedRoles = userRoles.map((r: unknown) =>
typeof r === "string" ? r : (r as Record<string, unknown>)?.id ?? String(r)
);
const rolesString = normalizedRoles.join(",");
await tx.execute(drizzleSql`
SELECT
set_config('app.user_id', ${userId}, true),
set_config('app.user_roles', ${rolesString}, true),
set_config('app.jwt', ${JSON.stringify({ sub: userId, roles: userRoles })}, true)
`);
const txEntityService = new EntityService(tx, this.delegate.registry);
const txDelegate = new PostgresDataDriver(tx, this.delegate.realtimeService, this.delegate.registry, this.user, this.delegate.poolManager, this.delegate.historyService);
txDelegate.entityService = txEntityService;
txDelegate._deferNotifications = true;
txDelegate._pendingNotifications = pendingNotifications;
return await operation(txDelegate);
});
for (const notification of pendingNotifications) {
try {
await this.delegate.realtimeService.notifyEntityUpdate(
notification.path,
notification.entityId,
notification.entity,
notification.databaseId
);
} catch (e) {
console.error("[DataDriver] Error flushing deferred notification:", e);
}
}
return result;
}
async fetchCollection<M extends Record<string, any>>(props: FetchCollectionProps<M>): Promise<Entity<M>[]> {
return this.withTransaction((delegate) => delegate.fetchCollection(props));
}
/**
* Injects the authenticated user's context into the most recently
* registered realtime subscription so RLS-aware polling can apply.
*/
private injectAuthContext(unsubscribe: () => void): () => void {
const authContext = { userId: this.user?.uid || "anonymous", roles: this.user?.roles ?? [] };
const entries = Array.from(this.delegate.realtimeService.subscriptions.entries());
const lastEntry = entries[entries.length - 1];
if (lastEntry && lastEntry[1].clientId === "driver") {
lastEntry[1].authContext = authContext;
}
return unsubscribe;
}
listenCollection<M extends Record<string, any>>(props: ListenCollectionProps<M>): () => void {
return this.injectAuthContext(this.delegate.listenCollection(props));
}
async fetchEntity<M extends Record<string, any>>(props: FetchEntityProps<M>): Promise<Entity<M> | undefined> {
return this.withTransaction((delegate) => delegate.fetchEntity(props));
}
listenEntity<M extends Record<string, any>>(props: ListenEntityProps<M>): () => void {
return this.injectAuthContext(this.delegate.listenEntity(props));
}
async saveEntity<M extends Record<string, any>>(props: SaveEntityProps<M>): Promise<Entity<M>> {
return this.withTransaction((delegate) => delegate.saveEntity(props));
}
async deleteEntity<M extends Record<string, any>>(props: DeleteEntityProps<M>): Promise<void> {
return this.withTransaction((delegate) => delegate.deleteEntity(props));
}
async checkUniqueField(
path: string,
name: string,
value: unknown,
entityId?: string,
collection?: EntityCollection
): Promise<boolean> {
return this.withTransaction((delegate) => delegate.checkUniqueField(path, name, value, entityId, collection));
}
async countEntities<M extends Record<string, any>>(props: FetchCollectionProps<M>): Promise<number> {
return this.withTransaction((delegate) => delegate.countEntities(props));
}
/**
* Intentionally delegates to the base delegate WITHOUT RLS wrapping.
* executeSql is an admin-only feature; access control should be enforced
* at the API route level, not via database-level RLS.
*/
async executeSql(sqlText: string, options?: { database?: string, role?: string }): Promise<Record<string, unknown>[]> {
return this.delegate.executeSql(sqlText, options);
}
async fetchAvailableDatabases(): Promise<string[]> {
return this.delegate.fetchAvailableDatabases();
}
async fetchAvailableRoles(): Promise<string[]> {
return this.delegate.fetchAvailableRoles();
}
async fetchCurrentDatabase(): Promise<string | undefined> {
return this.delegate.fetchCurrentDatabase();
}
async fetchUnmappedTables(mappedPaths?: string[]): Promise<string[]> {
return this.delegate.fetchUnmappedTables(mappedPaths);
}
async fetchTableMetadata(tableName: string) {
return this.delegate.fetchTableMetadata(tableName);
}
}
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