@angular/fire
Version:
The official library for Firebase and Angular
62 lines • 4.88 kB
JavaScript
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
/**
* @param {?} value
* @return {?}
*/
export function isString(value) {
return typeof value === 'string';
}
/**
* @param {?} value
* @return {?}
*/
export function isFirebaseDataSnapshot(value) {
return typeof value.exportVal === 'function';
}
/**
* @param {?} obj
* @return {?}
*/
export function isNil(obj) {
return obj === undefined || obj === null;
}
/**
* @param {?} value
* @return {?}
*/
export function isFirebaseRef(value) {
return typeof value.set === 'function';
}
/**
* Returns a database reference given a Firebase App and an
* absolute or relative path.
* @param {?} database - Firebase Database
* @param {?} pathRef - Database path, relative or absolute
* @return {?}
*/
export function getRef(database, pathRef) {
// if a db ref was passed in, just return it
return isFirebaseRef(pathRef) ? (/** @type {?} */ (pathRef))
: database.ref((/** @type {?} */ (pathRef)));
}
/**
* @param {?} item
* @param {?} cases
* @return {?}
*/
export function checkOperationCases(item, cases) {
if (isString(item)) {
return cases.stringCase();
}
else if (isFirebaseRef(item)) {
return cases.firebaseCase();
}
else if (isFirebaseDataSnapshot(item)) {
return cases.snapshotCase();
}
throw new Error(`Expects a string, snapshot, or reference. Got: ${typeof item}`);
}
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