packages/db/src/Databases/IndexedDb.Storage.ts
import type { IDBPDatabase } from "idb";
import { Query } from "mingo";
import type { AnyVal } from "mingo/types";
import { nanoid } from "nanoid";
import { DBLogger, InsertLog, QueryLog, RemoveLog, ReplaceLog, UpdateLog } from "../Logger.js";
import {
addOptions,
DuplicateDocumentError,
getInsertManyResult,
getInsertOneResult,
Index,
InsertManyResult,
InsertOneResult,
Options,
RemoveResult,
Storage,
update,
UpdateResult
} from "../Storage/mod.js";
import { Document, Filter, UpdateFilter, WithId } from "../Types.js";
import { IndexedDbCache } from "./IndexedDb.Cache.js";
const OBJECT_PROTOTYPE = Object.getPrototypeOf({}) as AnyVal;
const OBJECT_TAG = "[object Object]";
export class IndexedDbStorage<TSchema extends Document = Document> extends Storage<TSchema> {
readonly #cache = new IndexedDbCache<TSchema>();
readonly #promise: Promise<IDBPDatabase>;
#db?: IDBPDatabase;
constructor(name: string, promise: Promise<IDBPDatabase>, readonly log: DBLogger) {
super(name);
this.#promise = promise;
}
async resolve() {
if (this.#db === undefined) {
this.#db = await this.#promise;
}
return this;
}
async has(id: string): Promise<boolean> {
const document = await this.db.getFromIndex(this.name, "id", id);
if (document !== undefined) {
return true;
}
return false;
}
get db() {
if (this.#db === undefined) {
throw new Error("Database not initialized");
}
return this.#db;
}
/*
|--------------------------------------------------------------------------------
| Insert
|--------------------------------------------------------------------------------
*/
async insertOne(data: Partial<WithId<TSchema>>): Promise<InsertOneResult> {
const logger = new InsertLog(this.name);
const document = { ...data, id: data.id ?? nanoid() } as any;
if (await this.has(document.id)) {
throw new DuplicateDocumentError(document, this as any);
}
await this.db.transaction(this.name, "readwrite", { durability: "relaxed" }).store.add(document);
this.broadcast("insertOne", document);
this.#cache.flush();
this.log(logger.result());
return getInsertOneResult(document);
}
async insertMany(data: Partial<WithId<TSchema>>[]): Promise<InsertManyResult> {
const logger = new InsertLog(this.name);
const documents: WithId<TSchema>[] = [];
const tx = this.db.transaction(this.name, "readwrite", { durability: "relaxed" });
await Promise.all(
data.map((data) => {
const document = { ...data, id: data.id ?? nanoid() } as WithId<TSchema>;
documents.push(document);
return tx.store.add(document);
})
);
await tx.done;
this.broadcast("insertMany", documents);
this.#cache.flush();
this.log(logger.result());
return getInsertManyResult(documents);
}
/*
|--------------------------------------------------------------------------------
| Read
|--------------------------------------------------------------------------------
*/
async findById(id: string): Promise<WithId<TSchema> | undefined> {
return this.db.getFromIndex(this.name, "id", id);
}
async find(filter: Filter<WithId<TSchema>>, options: Options = {}): Promise<WithId<TSchema>[]> {
const logger = new QueryLog(this.name, { filter, options });
const hashCode = this.#cache.hash(filter, options);
const cached = this.#cache.get(hashCode);
if (cached !== undefined) {
this.log(logger.result({ cached: true }));
return cached;
}
const indexes = this.#resolveIndexes(filter);
let cursor = new Query(filter).find(await this.#getAll({ ...options, ...indexes }));
if (options !== undefined) {
cursor = addOptions(cursor, options);
}
const documents = cursor.all() as WithId<TSchema>[];
this.#cache.set(this.#cache.hash(filter, options), documents);
this.log(logger.result());
return documents;
}
/**
* TODO: Prototype! Needs to cover more mongodb query cases and investigation around
* nested indexing in indexeddb.
*/
#resolveIndexes(filter: any): { index?: { [key: string]: any } } {
const indexNames = this.db.transaction(this.name, "readonly").store.indexNames;
const index: { [key: string]: any } = {};
for (const key in filter) {
if (indexNames.contains(key) === true) {
let val: any;
if (isObject(filter[key]) === true) {
if (filter[key]["$in"] !== undefined) {
val = filter[key]["$in"];
}
} else {
val = filter[key];
}
if (val !== undefined) {
index[key] = val;
}
}
}
if (Object.keys(index).length > 0) {
return { index };
}
return {};
}
async #getAll({ index, offset, range, limit }: Options) {
if (index !== undefined) {
return this.#getAllByIndex(index);
}
if (range !== undefined) {
return this.db.getAll(this.name, IDBKeyRange.bound(range.from, range.to));
}
if (offset !== undefined) {
return this.#getAllByOffset(offset.value, offset.direction, limit);
}
return this.db.getAll(this.name, undefined, limit);
}
async #getAllByIndex(index: Index) {
let result = new Set();
for (const key in index) {
const value = index[key];
if (Array.isArray(value)) {
for (const idx of value) {
const values = await this.db.getAllFromIndex(this.name, key, idx);
result = new Set([...result, ...values]);
}
} else {
const values = await this.db.getAllFromIndex(this.name, key, value);
result = new Set([...result, ...values]);
}
}
return Array.from(result);
}
async #getAllByOffset(value: string, direction: 1 | -1, limit?: number) {
if (direction === 1) {
return this.db.getAll(this.name, IDBKeyRange.lowerBound(value), limit);
}
return this.#getAllByDescOffset(value, limit);
}
async #getAllByDescOffset(value: string, limit?: number) {
if (limit === undefined) {
return this.db.getAll(this.name, IDBKeyRange.upperBound(value));
}
const result = [];
let cursor = await this.db
.transaction(this.name, "readonly")
.store.openCursor(IDBKeyRange.upperBound(value), "prev");
for (let i = 0; i < limit; i++) {
if (cursor === null) {
break;
}
result.push(cursor.value);
cursor = await cursor.continue();
}
return result.reverse();
}
/*
|--------------------------------------------------------------------------------
| Update
|--------------------------------------------------------------------------------
*/
async updateOne(filter: Filter<WithId<TSchema>>, operators: UpdateFilter<TSchema>): Promise<UpdateResult> {
if (typeof filter.id === "string") {
return this.#update(filter.id, filter, operators);
}
const documents = await this.find(filter);
if (documents.length > 0) {
return this.#update(documents[0].id, filter, operators);
}
return new UpdateResult(0, 0);
}
async updateMany(filter: Filter<WithId<TSchema>>, operators: UpdateFilter<TSchema>): Promise<UpdateResult> {
const logger = new UpdateLog(this.name, { filter, operators });
const ids = await this.find(filter).then((data) => data.map((d) => d.id));
const documents: WithId<TSchema>[] = [];
let modifiedCount = 0;
const tx = this.db.transaction(this.name, "readwrite", { durability: "relaxed" });
await Promise.all(
ids.map((id) =>
tx.store.get(id).then((current) => {
if (current === undefined) {
return;
}
const { modified, document } = update<TSchema>(filter, operators, current);
if (modified) {
modifiedCount += 1;
documents.push(document);
return tx.store.put(document);
}
})
)
);
await tx.done;
this.broadcast("updateMany", documents);
this.#cache.flush();
this.log(logger.result());
return new UpdateResult(ids.length, modifiedCount);
}
async replace(filter: Filter<WithId<TSchema>>, document: TSchema): Promise<UpdateResult> {
const logger = new ReplaceLog(this.name, document);
const ids = await this.find(filter).then((data) => data.map((d) => d.id));
const documents: WithId<TSchema>[] = [];
const count = ids.length;
const tx = this.db.transaction(this.name, "readwrite", { durability: "relaxed" });
await Promise.all(
ids.map((id) => {
const next = { ...document, id };
documents.push(next);
return tx.store.put(next);
})
);
await tx.done;
this.broadcast("updateMany", documents);
this.#cache.flush();
this.log(logger.result({ count }));
return new UpdateResult(count, count);
}
async #update(
id: string | number,
filter: Filter<WithId<TSchema>>,
operators: UpdateFilter<TSchema>
): Promise<UpdateResult> {
const logger = new UpdateLog(this.name, { filter, operators });
const tx = this.db.transaction(this.name, "readwrite", { durability: "relaxed" });
const current = await tx.store.get(id);
if (current === undefined) {
await tx.done;
return new UpdateResult(0, 0);
}
const { modified, document } = await update<TSchema>(filter, operators, current);
if (modified === true) {
await tx.store.put(document);
}
await tx.done;
if (modified === true) {
this.broadcast("updateOne", document);
this.log(logger.result());
this.#cache.flush();
return new UpdateResult(1, 1);
}
return new UpdateResult(1);
}
/*
|--------------------------------------------------------------------------------
| Remove
|--------------------------------------------------------------------------------
*/
async remove(filter: Filter<WithId<TSchema>>): Promise<RemoveResult> {
const logger = new RemoveLog(this.name, { filter });
const documents = await this.find(filter);
const tx = this.db.transaction(this.name, "readwrite");
await Promise.all(documents.map((data) => tx.store.delete(data.id)));
await tx.done;
this.broadcast("remove", documents);
this.#cache.flush();
this.log(logger.result({ count: documents.length }));
return new RemoveResult(documents.length);
}
/*
|--------------------------------------------------------------------------------
| Count
|--------------------------------------------------------------------------------
*/
async count(filter?: Filter<WithId<TSchema>>): Promise<number> {
if (filter !== undefined) {
return (await this.find(filter)).length;
}
return this.db.count(this.name);
}
/*
|--------------------------------------------------------------------------------
| Flush
|--------------------------------------------------------------------------------
*/
async flush(): Promise<void> {
await this.db.clear(this.name);
this.#cache.flush();
}
}
/*
|--------------------------------------------------------------------------------
| Utils
|--------------------------------------------------------------------------------
*/
export function isObject(v: AnyVal): v is object {
if (!v) {
return false;
}
const proto = Object.getPrototypeOf(v) as AnyVal;
return (proto === OBJECT_PROTOTYPE || proto === null) && OBJECT_TAG === Object.prototype.toString.call(v);
}