SimpleChatTC:IDBHelper: Move core indexedDB helper as a module
ie opening db as well as a transaction to access a store within the db.
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//@ts-check
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// Helpers to handle indexedDB provided by browsers
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// by Humans for All
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//
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/**
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* Allows the db connection to be openned.
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* @param {string} dbName
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* @param {string} storeName
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* @param {string} callerTag
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*/
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export function db_open(dbName, storeName, callerTag="") {
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let tag = `iDB:${callerTag}`
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return new Promise((resolve, reject) => {
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const dbConn = indexedDB.open(dbName, 1);
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dbConn.onupgradeneeded = (ev) => {
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console.debug(`DBUG:${tag}:Conn:Upgrade needed...`)
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dbConn.result.createObjectStore(storeName);
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dbConn.result.onerror = (ev) => {
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console.info(`ERRR:${tag}:Db:Op failed [${ev}]...`)
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}
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};
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dbConn.onsuccess = (ev) => {
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console.debug(`INFO:${tag}:Conn:Opened...`)
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resolve(dbConn.result);
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}
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dbConn.onerror = (ev) => {
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console.info(`ERRR:${tag}:Conn:Failed [${ev}]...`)
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reject(ev);
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}
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});
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}
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/**
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* Get hold of a transaction wrt a specified store in the db
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* @param {IDBDatabase} db
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* @param {string} storeName
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* @param {IDBTransactionMode} opMode
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*/
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export function db_trans_store(db, storeName, opMode) {
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let dbTrans = db.transaction(storeName, opMode);
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let dbOS = dbTrans.objectStore(storeName);
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return dbOS
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}
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@ -4,44 +4,21 @@
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// by Humans for All
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//
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import * as mIdb from './idb.mjs'
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/**
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* Expects to get a message with cid, tcid, (f)name and args
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* Posts message with cid, tcid, (f)name and data if any
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*/
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/**
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* Allows the db connection to be openned.
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*/
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function db_open() {
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return new Promise((resolve, reject) => {
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const dbConn = indexedDB.open('TCDB', 1);
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dbConn.onupgradeneeded = (ev) => {
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console.debug("DBUG:WWDb:Conn:Upgrade needed...")
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dbConn.result.createObjectStore('theDB');
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dbConn.result.onerror = (ev) => {
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console.info(`ERRR:WWDb:Db:Op failed [${ev}]...`)
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}
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};
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dbConn.onsuccess = (ev) => {
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console.debug("INFO:WWDb:Conn:Opened...")
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resolve(dbConn.result);
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}
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dbConn.onerror = (ev) => {
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console.info(`ERRR:WWDb:Conn:Failed [${ev}]...`)
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reject(ev);
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}
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});
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}
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self.onmessage = async function (ev) {
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try {
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console.info(`DBUG:WWDb:${ev.data.name}:OnMessage started...`)
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/** @type {IDBDatabase} */
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let db = await db_open();
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let dbTrans = db.transaction('theDB', 'readwrite');
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let dbOS = dbTrans.objectStore('theDB');
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let db = await mIdb.db_open("TCDB", "theDB", "WWDb");
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let dbOS = mIdb.db_trans_store(db, "theDB", 'readwrite');
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let args = ev.data.args;
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switch (ev.data.name) {
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