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import { openDB, deleteDB } from 'idb';
export let db;
const dbName = !isDevServer ? 'trainsearch' : 'trainsearch_dev';
class IDBStorage {
constructor(idb) {
this.idb = idb;
}
static async open() {
const idb = await openDB(dbName, 3, {
upgrade: async (db, oldVersion, newVersion, transaction) => {
console.log(`upgrading database from ${oldVersion} to ${newVersion}`);
let settings;
switch (oldVersion) {
case 0:
/*
* in database scheme v1, the `journeys` object store stores whole searches, including journey data
*/
db.createObjectStore('journeys', {keyPath: 'slug'});
db.createObjectStore('journeysHistory', {autoIncrement: true});
db.createObjectStore('settings');
case 1:
/*
* in database scheme v2, there are the following data stores:
* `journey` for storing individual journeys with their refreshToken as index
* `journeysOverview`t contains the search results with the `.journeys` field being an array of refreshTokens.
*
* in comparison to v1, there are these additional changes:
* `journeys` object store is deleted.
* `journeysHistory` object store is cleared/recreated.
*/
/* clean up old stuff */
db.deleteObjectStore('journeys');
db.deleteObjectStore('journeysHistory');
/* create new stores */
db.createObjectStore('journey', {keyPath: 'refreshToken'});
db.createObjectStore('journeysOverview', {keyPath: 'slug'});
db.createObjectStore('journeysHistory', {autoIncrement: true});
case 2:
settings = await transaction.objectStore('settings').get('settings');
if (settings !== undefined && settings.profile === 'vbb') {
settings.profile = 'db';
}
await transaction.objectStore('settings').put(settings, 'settings');
case 3:
settings = await transaction.objectStore('settings').get('settings');
if (settings !== undefined && settings.bikeFriendly === undefined) {
settings.bikeFriendly = false;
}
await transaction.objectStore('settings').put(settings, 'settings');
case 4:
settings = await transaction.objectStore('settings').get('settings');
if (settings !== undefined && settings.loyaltyCard === undefined) {
settings.loyaltyCard = 'NONE';
}
await transaction.objectStore('settings').put(settings, 'settings');
case 5:
settings = await transaction.objectStore('settings').get('settings');
if (settings !== undefined && settings.walkingSpeed === undefined) {
settings.walkingSpeed = 'normal';
}
await transaction.objectStore('settings').put(settings, 'settings');
case 5:
settings = await transaction.objectStore('settings').get('settings');
if (settings !== undefined && settings.ageGroup === undefined) {
settings.ageGroup = 'E';
}
await transaction.objectStore('settings').put(settings, 'settings');
}
}
});
return new IDBStorage(idb);
}
async addJourneys(journeyEntries, overviewEntry, historyEntry) {
const tx = this.idb.transaction(['journey', 'journeysOverview', 'journeysHistory'], 'readwrite');
const journeyStore = tx.objectStore('journey');
const journeysOverviewStore = tx.objectStore('journeysOverview');
const journeysHistoryStore = tx.objectStore('journeysHistory');
let proms = journeyEntries.map(j => {
journeyStore.put(j);
});
if (overviewEntry.historyEntryId === undefined)
overviewEntry.historyEntryId = await journeysHistoryStore.put(historyEntry);
proms.push(journeysOverviewStore.put(overviewEntry));
proms.push(tx.done);
await Promise.all(proms);
}
async getHistory(profile) {
const tx = this.idb.transaction('journeysHistory');
const history = [];
for await (const cursor of tx.store) {
if (profile !== undefined && profile !== cursor.value.profile) continue;
history.push({
...cursor.value,
key: cursor.key,
});
}
return history;
}
async addHistoryEntry(entry) {
await this.idb.put('journeysHistory', entry);
}
async updateHistoryEntry(key, entry) {
await this.idb.put('journeysHistory', entry, key);
}
async getHistoryEntry(key) {
return await this.idb.get('journeysHistory', key);
}
async getSettings() {
return await this.idb.get('settings', 'settings');
}
async modifySettings(prevSettings, callback) {
const tx = this.idb.transaction('settings', 'readwrite');
const newSettings = callback(prevSettings);
await Promise.all([
tx.store.put(newSettings, 'settings'),
tx.done
]);
return newSettings;
}
async getJourneysOverview(slug) {
return await this.idb.get('journeysOverview', slug);
}
async getJourney(refreshToken) {
const journeyObject = await this.idb.get('journey', refreshToken);
return journeyObject;
}
async updateJourney(data) {
return await this.idb.put('journey', data);
}
}
export const clearDataStorage = async () => await deleteDB(dbName);
export const initDataStorage = async () => {
try {
db = await IDBStorage.open();
} catch(e) {
console.log("IndexedDB initialization failed: ", e);
alert("IndexedDB initialization failed!");
}
};