IndexedDB CRUD

Simple IndexedDB CRUD example

//https://habr.com/post/213515/

// This works on all devices/browsers, and uses IndexedDBShim as a final fallback 
var indexedDB		= window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB || window.shimIndexedDB,
	IDBTransaction  = window.IDBTransaction || window.webkitIDBTransaction || window.msIDBTransaction,
	baseName 	    = "baseName",
	storeName 	    = "storeName";

function logerr(err){
	console.log(err);
}

function connectDB(f){
	// Open (or create) the database
	var request = indexedDB.open(baseName, 1);
	request.onerror = logerr;
	request.onsuccess = function(){
		f(request.result);
	}
	request.onupgradeneeded = function(e){
		//console.log("running onupgradeneeded");
		var Db = e.currentTarget.result;//var Db = e.target.result;
		
		//uncomment if we want to start clean
		//if(Db.objectStoreNames.contains(storeName)) Db.deleteObjectStore("note");
		
		//Create store
		if(!Db.objectStoreNames.contains(storeName)) {
			var store = Db.createObjectStore(storeName, {keyPath: "id", autoIncrement:true});  
			//store.createIndex("NameIndex", ["name.last", "name.first"], { unique: false });
		}
		connectDB(f);
	}
}

function get(id,f){
	connectDB(function(db){
		var transaction = db.transaction([storeName], "readonly").objectStore(storeName).get(id);
		transaction.onerror = logerr;
		transaction.onsuccess = function(){
			f(transaction.result ? transaction.result : -1);
		}
	});
}

function getAll(f){
	connectDB(function(db){
		var rows = [],
			store = db.transaction([storeName], "readonly").objectStore(storeName);

		if(store.mozGetAll)
			store.mozGetAll().onsuccess = function(e){
				f(e.target.result);
			};
		else
			store.openCursor().onsuccess = function(e) {
				var cursor = e.target.result;
				if(cursor){
					rows.push(cursor.value);
					cursor.continue();
				}
				else {
					f(rows);
				}
			};
	});
}

function up(obj){//obj with id
	del(obj.id,'up');
	add(obj,'up');
}

function add(obj,info){
	info = typeof info !== 'undefined' ? false : true;
	connectDB(function(db){
		var transaction = db.transaction([storeName], "readwrite");
		var objectStore = transaction.objectStore(storeName);
		var objectStoreRequest = objectStore.add(obj);
		objectStoreRequest.onerror = logerr;
		objectStoreRequest.onsuccess = function(){
			if(info)
				{console.log("Rows has been added");}
			else
				{console.log("Rows has been updated");}
			console.info(objectStoreRequest.result);
		}
	});
}

function del(id,info){
	info = typeof info !== 'undefined' ? false : true;
	connectDB(function(db){
		var transaction = db.transaction([storeName], "readwrite");
		var objectStore = transaction.objectStore(storeName);
		var objectStoreRequest = objectStore.delete(id);
		objectStoreRequest.onerror = logerr;
		objectStoreRequest.onsuccess = function(){
			if(info)
				console.log("Rows has been deleted: ", id);
		}
	});
}

//add data
add({word:'one',data:100});
add({word:'two',data:200});
add({word:'three',data:300});
add({word:'seven',data:700});

//edit data
up({word:'five',data:500,id:1});

//delete
del(3);

//get data
func=function(result){
	console.log(result);
};
get(1,func);
getAll(func);