cleanup idb storage

src/main.js

@@ -1,5 +1,6 @@
-import Network from "../network.js";
-import Session from "../session.js";
+import Network from "./network.js";
+import Session from "./session.js";
+import createIdbStorage from "./storage/idb/factory.js";
 const HOMESERVER = "http://localhost:8008";
 
 async function getLoginData(username, password) {
@@ -17,7 +18,7 @@ async function getLoginData(username, password) {
 async function main() {
 	const loginData = await getLoginData("bruno1", "testtest");
 	const network = new Network(HOMESERVER, loginData.access_token);
-	const storage = new IdbStorage("morpheus_session");
+	const storage = await createIdbStorage("morpheus_session");
 	const session = new Session(loginData, storage);
 	await session.load();
 	const sync = new Sync(network, session, storage);

src/storage/idb/factory.js

@@ -0,0 +1,18 @@
+export default async function createIdbStorage(databaseName) {
+	const db = await openDatabase(databaseName, createStores);
+	return new Storage(db);
+}
+
+function createStores(db) {
+	db.createObjectStore("sync");	//sync token 
+	db.createObjectStore("roomSummary", "room_id", {unique: true});
+	const timeline = db.createObjectStore("roomTimeline", ["room_id", "sort_key"]);
+	timeline.createIndex("by_event_id", ["room_id", "event.event_id"], {unique: true});
+	// how to get the first/last x events for a room?
+	// we don't want to specify the sort key, but would need an index for the room_id?
+	// take sort_key as primary key then and have index on event_id?
+	// still, you also can't have a PK of [room_id, sort_key] and get the last or first events with just the room_id? the only thing that changes it that the PK will provide an inherent sorting that you inherit in an index that only has room_id as keyPath??? There must be a better way, need to write a prototype test for this.
+	// SOLUTION: with numeric keys, you can just us a min/max value to get first/last
+	// db.createObjectStore("members", ["room_id", "state_key"]);
+	const state = db.createObjectStore("roomState", ["event.room_id", "event.type", "event.state_key"]);
+}

src/storage/idb/index.js

@@ -0,0 +1,11 @@
+import QueryTarget from "./query-target.js";
+
+export default class Index extends QueryTarget {
+	constructor(index) {
+		this._index = index;
+	}
+
+	_queryTarget() {
+		return this._index;
+	}
+}

src/storage/idb/query-target.js

@@ -1,80 +1,6 @@
-const SYNC_STORES = [
-	"sync",
-	"summary",
-	"timeline",
-	"members",
-	"state"
-];
+import {iterateCursor} from "./utils";
 
-class Database {
-	constructor(idbDatabase) {
-		this._db = idbDatabase;
-		this._syncTxn = null;
-	}
-
-	async startSyncTxn() {
-		const txn = this._db.transaction(SYNC_STORES, "readwrite");
-		return new Transaction(txn, SYNC_STORES);
-	}
-
-	startReadOnlyTxn(storeName) {
-		if (this._syncTxn && SYNC_STORES.includes(storeName)) {
-			return this._syncTxn;
-		} else {
-			return this._db.transaction([storeName], "readonly");
-		}
-	}
-
-	startReadWriteTxn(storeName) {
-		if (this._syncTxn && SYNC_STORES.includes(storeName)) {
-			return this._syncTxn;
-		} else {
-			return this._db.transaction([storeName], "readwrite");
-		}
-	}
-
-	store(storeName) {
-		return new ObjectStore(this, storeName);
-	}
-}
-
-class Transaction {
-	constructor(txn, allowedStoreNames) {
-		this._txn = txn;
-		this._stores = {
-			sync: null,
-			summary: null,
-			timeline: null,
-			state: null,
-		};
-		this._allowedStoreNames = allowedStoreNames;
-	}
-
-	_idbStore(name) {
-		if (!this._allowedStoreNames.includes(name)) {
-			throw new Error(`Invalid store for transaction: ${name}, only ${this._allowedStoreNames.join(", ")} are allowed.`);
-		}
-		return new ObjectStore(this._txn.getObjectStore(name));
-	}
-
-	get timeline() {
-		if (!this._stores.timeline) {
-			const idbStore = this._idbStore("timeline");
-			this._stores.timeline = new TimelineStore(idbStore);
-		}
-		return this._stores.timeline;
-	}
-
-	complete() {
-		return txnAsPromise(this._txn);
-	}
-
-	abort() {
-		this._txn.abort();
-	}
-}
-
-class QueryTarget {
+export default class QueryTarget {
 	reduce(range, reducer, initialValue) {
 		return this._reduce(range, reducer, initialValue, "next");
 	}
@@ -165,28 +91,4 @@ class QueryTarget {
 	_queryTarget() {
 		throw new Error("override this");
 	}
-}
-
-class ObjectStore extends QueryTarget {
-	constructor(store) {
-		this._store = store;
-	}
-
-	_queryTarget() {
-		return this._store;
-	}
-
-	index(indexName) {
-		return new Index(this._store.index(indexName));
-	}
-}
-
-class Index extends QueryTarget {
-	constructor(index) {
-		this._index = index;
-	}
-
-	_queryTarget() {
-		return this._index;
-	}
 }

src/storage/idb/storage.js

@@ -0,0 +1,31 @@
+export const STORE_NAMES = ["sync", "roomState", "roomSummary", "roomTimeline"];
+
+export default class Storage {
+	constructor(idbDatabase) {
+		this._db = idbDatabase;
+		const nameMap = STORE_NAMES.reduce((nameMap, name) => {
+			nameMap[name] = name;
+			return nameMap;
+		}, {});
+		this.storeNames = Object.freeze(nameMap);
+	}
+
+	_validateStoreNames(storeNames) {
+		const unknownStoreName = storeNames.find(name => !STORE_NAMES.includes(name));
+		if (unknownStoreName) {
+			throw new Error(`Tried to open a transaction for unknown store ${unknownStoreName}`);
+		}
+	}
+
+	startReadOnlyTxn(storeNames) {
+		this._validateStoreNames(storeNames);
+		const txn = this._db.transaction(storeNames, "readonly");
+		return new Transaction(txn, storeNames);
+	}
+
+	startReadWriteTxn(storeNames) {
+		this._validateStoreNames(storeNames);
+		const txn = this._db.transaction(storeNames, "readwrite");
+		return new Transaction(txn, storeNames);
+	}
+}

src/storage/idb/store.js

@@ -0,0 +1,16 @@
+import QueryTarget from "./query-target.js";
+import Index from "./index.js";
+
+export default class Store extends QueryTarget {
+	constructor(store) {
+		this._store = store;
+	}
+
+	_queryTarget() {
+		return this._store;
+	}
+
+	index(indexName) {
+		return new Index(this._store.index(indexName));
+	}
+}

src/storage/idb/stores/session-index.js

@@ -6,8 +6,8 @@ function createSessionsStore(db) {
 
 function createStores(db) {
 	db.createObjectStore("sync");	//sync token 
-	db.createObjectStore("summary", "room_id", {unique: true});
-	const timeline = db.createObjectStore("timeline", ["room_id", "sort_key"]);
+	db.createObjectStore("roomSummary", "room_id", {unique: true});
+	const timeline = db.createObjectStore("roomTimeline", ["room_id", "sort_key"]);
 	timeline.createIndex("by_event_id", ["room_id", "event.event_id"], {unique: true});
 	// how to get the first/last x events for a room?
 	// we don't want to specify the sort key, but would need an index for the room_id?
@@ -15,7 +15,7 @@ function createStores(db) {
 	// still, you also can't have a PK of [room_id, sort_key] and get the last or first events with just the room_id? the only thing that changes it that the PK will provide an inherent sorting that you inherit in an index that only has room_id as keyPath??? There must be a better way, need to write a prototype test for this.
 	// SOLUTION: with numeric keys, you can just us a min/max value to get first/last
 	// db.createObjectStore("members", ["room_id", "state_key"]);
-	const state = db.createObjectStore("state", ["event.room_id", "event.type", "event.state_key"]);
+	const state = db.createObjectStore("roomState", ["event.room_id", "event.type", "event.state_key"]);
 }
 
 class Sessions {

src/storage/idb/stores/state.js

@@ -1,5 +1,5 @@
 class StateStore {
-	constructor(roomId, db) {
+	constructor(db) {
 
 	}
 

src/storage/idb/sync.js

@@ -1,13 +0,0 @@
-class SyncTransaction {
-	setSyncToken(syncToken, lastSynced) {
-
-	}
-
-	getRoomStore(roomId) {
-		new RoomStore(new Database(null, this._txn), roomId)
-	}
-
-	result() {
-		return txnAsPromise(this._txn);
-	}
-}

src/storage/idb/transaction.js

@@ -0,0 +1,40 @@
+import {txnAsPromise} from "./utils";
+import Store from "./store.js";
+import TimelineStore from "./stores/timeline.js";
+
+export default class Transaction {
+	constructor(txn, allowedStoreNames) {
+		this._txn = txn;
+		this._allowedStoreNames = allowedStoreNames;
+		this._stores = {
+			sync: null,
+			summary: null,
+			timeline: null,
+			state: null,
+		};
+	}
+
+	_store(name) {
+		if (!this._allowedStoreNames.includes(name)) {
+			// more specific error? this is a bug, so maybe not ...
+			throw new Error(`Invalid store for transaction: ${name}, only ${this._allowedStoreNames.join(", ")} are allowed.`);
+		}
+		return new Store(this._txn.getObjectStore(name));
+	}
+
+	get timeline() {
+		if (!this._stores.timeline) {
+			const idbStore = this._idbStore("timeline");
+			this._stores.timeline = new TimelineStore(idbStore);
+		}
+		return this._stores.timeline;
+	}
+
+	complete() {
+		return txnAsPromise(this._txn);
+	}
+
+	abort() {
+		this._txn.abort();
+	}
+}

src/sync.js

@@ -62,7 +62,12 @@ export class Sync {
 		this._currentRequest = this._network.sync(timeout, syncToken);
 		const response = await this._currentRequest.response;
 		syncToken = response.next_batch;
-		const txn = this._storage.startSyncTxn();
+		const storeNames = this._storage.storeNames;
+		const txn = this._storage.startReadWriteTxn([
+			storeNames.timeline,
+			storeNames.sync,
+			storeNames.state
+		]);
 		try {
 			session.applySync(syncToken, response.account_data, txn);
 			// to_device