angular-11-indexeddb
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A powerful and flexible Angular 11 library for managing client-side storage using IndexedDB with support for cache expiration and CRUD operations.
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(function (global, factory) {
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/******************************************************************************
Copyright (c) Microsoft Corporation.
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.
***************************************************************************** */
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// Define InjectionTokens for dbName and storeName
var DB_NAME = new i0.InjectionToken('DB_NAME');
var STORE_NAME = new i0.InjectionToken('STORE_NAME');
var CACHED_TIME = new i0.InjectionToken('CACHED_TIME'); // Add new token for cached time
var DataToStore = /** @class */ (function () {
function DataToStore(id, value) {
this.cachedTime = null;
this.id = id;
this.value = value;
this.savedTime = new Date().toISOString(); // Generate the current timestamp
}
return DataToStore;
}());
var IndexedDbHandler = /** @class */ (function () {
function IndexedDbHandler(dbName, storeName, cachedTime) {
this.dbName = dbName;
this.storeName = storeName;
this.cachedTime = cachedTime;
this.dbInitialized = this.initDB();
}
/**
* Ensures that the database is fully set up before performing any operations.
* @returns A promise that resolves when the IndexedDB is initialized.
*/
IndexedDbHandler.prototype.whenInitialized = function () {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
return [2 /*return*/, this.dbInitialized];
});
});
};
/**
* Initializes the IndexedDB and creates the object store if it doesn't exist.
* @returns A promise that resolves to the IndexedDB instance.
*/
IndexedDbHandler.prototype.initDB = function () {
var _this = this;
return new Promise(function (resolve, reject) {
var request = indexedDB.open(_this.dbName);
request.onupgradeneeded = function (event) {
var db = event.target.result;
if (!db.objectStoreNames.contains(_this.storeName)) {
db.createObjectStore(_this.storeName, { keyPath: 'id' });
console.info("Object store '" + _this.storeName + "' created.");
}
};
request.onsuccess = function (event) {
var db = event.target.result;
resolve(db);
};
request.onerror = function (event) {
console.error('Error opening IndexedDB:', event);
reject(event.target.error);
};
});
};
/**
* Saves data to the IndexedDB.
* @param key The key used to store the data.
* @param value The data to be saved.
* @param cacheTime Optional parameter to specify the cache time for the data.
* @returns A promise that resolves when the data is saved.
*/
IndexedDbHandler.prototype.saveData = function (key, value, cacheTime) {
if (cacheTime === void 0) { cacheTime = null; }
return __awaiter(this, void 0, void 0, function () {
var db, transaction, store, dataToStore;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this.whenInitialized()];
case 1:
_a.sent(); // Ensure DB is initialized
return [4 /*yield*/, this.whenInitialized()];
case 2:
db = _a.sent();
transaction = db.transaction(this.storeName, 'readwrite');
store = transaction.objectStore(this.storeName);
dataToStore = new DataToStore(key, value);
dataToStore.cachedTime = cacheTime; // Set the cacheTime (null if not provided)
return [2 /*return*/, new Promise(function (resolve, reject) {
var request = store.put(dataToStore); // Save the object
request.onsuccess = function () {
resolve();
};
request.onerror = function (event) {
reject("Error saving data: " + event);
};
})];
}
});
});
};
/**
* Retrieves data from the IndexedDB by key.
* @param key The key of the data to retrieve.
* @returns A promise that resolves to the data or null if not found or expired.
*/
IndexedDbHandler.prototype.getData = function (key) {
return __awaiter(this, void 0, void 0, function () {
var db, transaction, store;
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this.whenInitialized()];
case 1:
_a.sent(); // Ensure DB is initialized
return [4 /*yield*/, this.whenInitialized()];
case 2:
db = _a.sent();
transaction = db.transaction(this.storeName, 'readonly');
store = transaction.objectStore(this.storeName);
return [2 /*return*/, new Promise(function (resolve, reject) {
var request = store.get(key); // Retrieve data by key
request.onsuccess = function () { return __awaiter(_this, void 0, void 0, function () {
var cachedTime, isExpired;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
if (!(request.result === undefined)) return [3 /*break*/, 1];
resolve(null); // Return null if no data found
return [3 /*break*/, 6];
case 1:
cachedTime = request.result.cachedTime;
isExpired = false;
if (!(cachedTime === null)) return [3 /*break*/, 3];
return [4 /*yield*/, this.checkIfExpired(request.result.savedTime, this.cachedTime)];
case 2:
// If cachedTime is null, use the default CACHED_TIME for expiration check
isExpired = _a.sent();
return [3 /*break*/, 5];
case 3: return [4 /*yield*/, this.checkIfExpired(request.result.savedTime, cachedTime)];
case 4:
// If cachedTime exists, check against it
isExpired = _a.sent();
_a.label = 5;
case 5:
if (isExpired) {
resolve(null); // Return null if data is expired
}
else {
resolve(request.result.value); // Return the value if not expired
}
_a.label = 6;
case 6: return [2 /*return*/];
}
});
}); };
request.onerror = function (event) {
reject("Error retrieving data: " + event);
};
})];
}
});
});
};
/**
* Removes data from the IndexedDB by key.
* @param key The key of the data to remove.
* @returns A promise that resolves when the data is removed.
*/
IndexedDbHandler.prototype.removeData = function (key) {
return __awaiter(this, void 0, void 0, function () {
var db, transaction, store;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this.whenInitialized()];
case 1:
_a.sent(); // Ensure DB is initialized
return [4 /*yield*/, this.whenInitialized()];
case 2:
db = _a.sent();
transaction = db.transaction(this.storeName, 'readwrite');
store = transaction.objectStore(this.storeName);
return [2 /*return*/, new Promise(function (resolve, reject) {
var request = store.delete(key); // Delete data by key
request.onsuccess = function () {
resolve(); // Resolve when the data is removed
};
request.onerror = function (event) {
reject("Error removing data: " + event);
};
})];
}
});
});
};
/**
* Updates data in the IndexedDB by key.
* @param key The key of the data to update.
* @param value The new data to update.
* @returns A promise that resolves when the data is updated.
*/
IndexedDbHandler.prototype.updateData = function (key, value) {
return __awaiter(this, void 0, void 0, function () {
var db, transaction, store, dataToStore;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this.whenInitialized()];
case 1:
_a.sent(); // Ensure DB is initialized
return [4 /*yield*/, this.whenInitialized()];
case 2:
db = _a.sent();
transaction = db.transaction(this.storeName, 'readwrite');
store = transaction.objectStore(this.storeName);
dataToStore = new DataToStore(key, value);
return [2 /*return*/, new Promise(function (resolve, reject) {
var request = store.put(dataToStore); // Save the object
request.onsuccess = function () {
resolve();
};
request.onerror = function (event) {
reject("Error saving data: " + event);
};
})];
}
});
});
};
/**
* Retrieves all data from the IndexedDB store.
* Filters out expired data based on the cache time or default expiration time.
* @returns A promise that resolves to an array of all valid data items.
*/
IndexedDbHandler.prototype.getAll = function () {
return __awaiter(this, void 0, void 0, function () {
var db, transaction, store;
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this.whenInitialized()];
case 1:
_a.sent(); // Ensure DB is initialized
return [4 /*yield*/, this.whenInitialized()];
case 2:
db = _a.sent();
transaction = db.transaction(this.storeName, 'readonly');
store = transaction.objectStore(this.storeName);
return [2 /*return*/, new Promise(function (resolve, reject) {
var getRequest = store.getAll(); // Get all records from the store
// Handle success
getRequest.onsuccess = function () { return __awaiter(_this, void 0, void 0, function () {
var result, filteredResults;
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
result = getRequest.result;
if (!(result === undefined || result.length === 0)) return [3 /*break*/, 1];
resolve([]); // Return an empty array if no data found
return [3 /*break*/, 3];
case 1: return [4 /*yield*/, Promise.all(result.map(function (item) { return __awaiter(_this, void 0, void 0, function () {
var isExpired, cachedTime;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
isExpired = false;
cachedTime = item.cachedTime;
if (!(cachedTime === null)) return [3 /*break*/, 2];
return [4 /*yield*/, this.checkIfExpired(item.savedTime, this.cachedTime)];
case 1:
// If cachedTime is null, compare against CACHED_TIME
isExpired = _a.sent();
return [3 /*break*/, 4];
case 2: return [4 /*yield*/, this.checkIfExpired(item.savedTime, cachedTime)];
case 3:
// Compare against cachedTime
isExpired = _a.sent();
_a.label = 4;
case 4: return [2 /*return*/, isExpired ? null : item.value]; // Exclude expired items
}
});
}); }))];
case 2:
filteredResults = _a.sent();
// Filter out null values (expired data)
resolve(filteredResults.filter(function (item) { return item !== null; }));
_a.label = 3;
case 3: return [2 /*return*/];
}
});
}); };
// Handle error
getRequest.onerror = function (event) {
reject("Error retrieving all data from IndexedDB: " + event);
};
})];
}
});
});
};
/**
* Clears all data in the IndexedDB store.
* @returns A promise that resolves when the store is cleared.
*/
IndexedDbHandler.prototype.clearStore = function () {
return __awaiter(this, void 0, void 0, function () {
var db, transaction, store;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this.whenInitialized()];
case 1:
_a.sent(); // Ensure DB is initialized
return [4 /*yield*/, this.whenInitialized()];
case 2:
db = _a.sent();
transaction = db.transaction(this.storeName, 'readwrite');
store = transaction.objectStore(this.storeName);
return [2 /*return*/, new Promise(function (resolve, reject) {
var request = store.clear(); // Clear all records in the store
request.onsuccess = function () {
resolve(); // Resolve if the store is cleared successfully
};
request.onerror = function (event) {
reject("Error clearing the store: " + event); // Reject if there's an error
};
})];
}
});
});
};
/**
* Getter for the cached time value.
* @returns The current cached time value.
*/
IndexedDbHandler.prototype.getCachedTime = function () {
return this.cachedTime;
};
/**
* Setter for the cached time value.
* @param newCachedTime The new cached time value to set.
*/
IndexedDbHandler.prototype.setCachedTime = function (newCachedTime) {
this.cachedTime = newCachedTime; // Update the cachedTime value
};
/**
* Checks if the data has expired based on the saved time and comparison time.
* @param savedTime The saved time of the data.
* @param comparisonTimeInMs The comparison time in milliseconds.
* @returns A promise that resolves to a boolean indicating if the data is expired.
*/
IndexedDbHandler.prototype.checkIfExpired = function (savedTime, comparisonTimeInMs) {
return __awaiter(this, void 0, void 0, function () {
var currentTime, savedTimeStamp, difference;
return __generator(this, function (_a) {
if (comparisonTimeInMs === 0) {
return [2 /*return*/, false]; // If comparisonTime is 0, data never expires
}
currentTime = new Date().getTime();
savedTimeStamp = new Date(savedTime).getTime();
difference = currentTime - savedTimeStamp;
// Check if the time difference exceeds the comparisonTime (in milliseconds)
return [2 /*return*/, difference > comparisonTimeInMs];
});
});
};
return IndexedDbHandler;
}());
IndexedDbHandler.ɵprov = i0__namespace.ɵɵdefineInjectable({ factory: function IndexedDbHandler_Factory() { return new IndexedDbHandler(i0__namespace.ɵɵinject(DB_NAME), i0__namespace.ɵɵinject(STORE_NAME), i0__namespace.ɵɵinject(CACHED_TIME)); }, token: IndexedDbHandler, providedIn: "root" });
IndexedDbHandler.decorators = [
{ type: i0.Injectable, args: [{
providedIn: 'root',
},] }
];
IndexedDbHandler.ctorParameters = function () { return [
{ type: String, decorators: [{ type: i0.Inject, args: [DB_NAME,] }] },
{ type: String, decorators: [{ type: i0.Inject, args: [STORE_NAME,] }] },
{ type: Number, decorators: [{ type: i0.Inject, args: [CACHED_TIME,] }] }
]; };
/*
* Public API Surface of angular-11-indexeddb
*/
/**
* Generated bundle index. Do not edit.
*/
exports.CACHED_TIME = CACHED_TIME;
exports.DB_NAME = DB_NAME;
exports.DataToStore = DataToStore;
exports.IndexedDbHandler = IndexedDbHandler;
exports.STORE_NAME = STORE_NAME;
Object.defineProperty(exports, '__esModule', { value: true });
}));
//# sourceMappingURL=angular-11-indexeddb.umd.js.map