react-native-firebase/lib/modules/firestore/DocumentReference.js

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/**
* @flow
* DocumentReference representation wrapper
*/
import CollectionReference from './CollectionReference';
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import DocumentSnapshot from './DocumentSnapshot';
import FieldPath from './FieldPath';
import { mergeFieldPathData } from './utils';
import { buildNativeMap } from './utils/serialize';
import { getAppEventName, SharedEventEmitter } from '../../utils/events';
import { getLogger } from '../../utils/log';
import { firestoreAutoId, isFunction, isObject, isString } from '../../utils';
import { getNativeModule } from '../../utils/native';
import type Firestore from './';
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import type { FirestoreNativeDocumentSnapshot, FirestoreWriteOptions } from '../../types';
import type Path from './Path';
type DocumentListenOptions = {
includeMetadataChanges: boolean,
}
type ObserverOnError = (Object) => void;
type ObserverOnNext = (DocumentSnapshot) => void;
type Observer = {
error?: ObserverOnError,
next: ObserverOnNext,
}
/**
* @class DocumentReference
*/
export default class DocumentReference {
_documentPath: Path;
_firestore: Firestore;
constructor(firestore: Firestore, documentPath: Path) {
this._documentPath = documentPath;
this._firestore = firestore;
}
get firestore(): Firestore {
return this._firestore;
}
get id(): string | null {
return this._documentPath.id;
}
get parent(): CollectionReference {
const parentPath = this._documentPath.parent();
if (!parentPath) {
throw new Error('Invalid document path');
}
return new CollectionReference(this._firestore, parentPath);
}
get path(): string {
return this._documentPath.relativeName;
}
collection(collectionPath: string): CollectionReference {
const path = this._documentPath.child(collectionPath);
if (!path.isCollection) {
throw new Error('Argument "collectionPath" must point to a collection.');
}
return new CollectionReference(this._firestore, path);
}
delete(): Promise<void> {
return getNativeModule(this._firestore)
.documentDelete(this.path);
}
get(): Promise<DocumentSnapshot> {
return getNativeModule(this._firestore)
.documentGet(this.path)
.then(result => new DocumentSnapshot(this._firestore, result));
}
onSnapshot(
optionsOrObserverOrOnNext: DocumentListenOptions | Observer | ObserverOnNext,
observerOrOnNextOrOnError?: Observer | ObserverOnNext | ObserverOnError,
onError?: ObserverOnError,
) {
let observer: Observer;
let docListenOptions = {};
// Called with: onNext, ?onError
if (isFunction(optionsOrObserverOrOnNext)) {
if (observerOrOnNextOrOnError && !isFunction(observerOrOnNextOrOnError)) {
throw new Error('DocumentReference.onSnapshot failed: Second argument must be a valid function.');
}
// $FlowBug: Not coping with the overloaded method signature
observer = {
next: optionsOrObserverOrOnNext,
error: observerOrOnNextOrOnError,
};
} else if (optionsOrObserverOrOnNext && isObject(optionsOrObserverOrOnNext)) {
// Called with: Observer
if (optionsOrObserverOrOnNext.next) {
if (isFunction(optionsOrObserverOrOnNext.next)) {
if (optionsOrObserverOrOnNext.error && !isFunction(optionsOrObserverOrOnNext.error)) {
throw new Error('DocumentReference.onSnapshot failed: Observer.error must be a valid function.');
}
// $FlowBug: Not coping with the overloaded method signature
observer = {
next: optionsOrObserverOrOnNext.next,
error: optionsOrObserverOrOnNext.error,
};
} else {
throw new Error('DocumentReference.onSnapshot failed: Observer.next must be a valid function.');
}
} else if (optionsOrObserverOrOnNext.includeMetadataChanges) {
docListenOptions = optionsOrObserverOrOnNext;
// Called with: Options, onNext, ?onError
if (isFunction(observerOrOnNextOrOnError)) {
if (onError && !isFunction(onError)) {
throw new Error('DocumentReference.onSnapshot failed: Third argument must be a valid function.');
}
// $FlowBug: Not coping with the overloaded method signature
observer = {
next: observerOrOnNextOrOnError,
error: onError,
};
// Called with Options, Observer
} else if (observerOrOnNextOrOnError && isObject(observerOrOnNextOrOnError) && observerOrOnNextOrOnError.next) {
if (isFunction(observerOrOnNextOrOnError.next)) {
if (observerOrOnNextOrOnError.error && !isFunction(observerOrOnNextOrOnError.error)) {
throw new Error('DocumentReference.onSnapshot failed: Observer.error must be a valid function.');
}
observer = {
next: observerOrOnNextOrOnError.next,
error: observerOrOnNextOrOnError.error,
};
} else {
throw new Error('DocumentReference.onSnapshot failed: Observer.next must be a valid function.');
}
} else {
throw new Error('DocumentReference.onSnapshot failed: Second argument must be a function or observer.');
}
} else {
throw new Error('DocumentReference.onSnapshot failed: First argument must be a function, observer or options.');
}
} else {
throw new Error('DocumentReference.onSnapshot failed: Called with invalid arguments.');
}
const listenerId = firestoreAutoId();
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const listener = (nativeDocumentSnapshot: FirestoreNativeDocumentSnapshot) => {
const documentSnapshot = new DocumentSnapshot(this.firestore, nativeDocumentSnapshot);
observer.next(documentSnapshot);
};
// Listen to snapshot events
SharedEventEmitter.addListener(
getAppEventName(this._firestore, `onDocumentSnapshot:${listenerId}`),
listener,
);
// Listen for snapshot error events
if (observer.error) {
SharedEventEmitter.addListener(
getAppEventName(this._firestore, `onDocumentSnapshotError:${listenerId}`),
observer.error,
);
}
// Add the native listener
getNativeModule(this._firestore)
.documentOnSnapshot(this.path, listenerId, docListenOptions);
// Return an unsubscribe method
return this._offDocumentSnapshot.bind(this, listenerId, listener);
}
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set(data: Object, writeOptions?: FirestoreWriteOptions): Promise<void> {
const nativeData = buildNativeMap(data);
return getNativeModule(this._firestore)
.documentSet(this.path, nativeData, writeOptions);
}
update(...args: any[]): Promise<void> {
let data = {};
if (args.length === 1) {
if (!isObject(args[0])) {
throw new Error('DocumentReference.update failed: If using a single argument, it must be an object.');
}
data = args[0];
} else if (args.length % 2 === 1) {
throw new Error('DocumentReference.update failed: Must have either a single object argument, or equal numbers of key/value pairs.');
} else {
for (let i = 0; i < args.length; i += 2) {
const key = args[i];
const value = args[i + 1];
if (isString(key)) {
data[key] = value;
} else if (key instanceof FieldPath) {
data = mergeFieldPathData(data, key._segments, value);
} else {
throw new Error(`DocumentReference.update failed: Argument at index ${i} must be a string or FieldPath`);
}
}
}
const nativeData = buildNativeMap(data);
return getNativeModule(this._firestore)
.documentUpdate(this.path, nativeData);
}
/**
* INTERNALS
*/
/**
* Remove document snapshot listener
* @param listener
*/
_offDocumentSnapshot(listenerId: string, listener: Function) {
getLogger(this._firestore).info('Removing onDocumentSnapshot listener');
SharedEventEmitter.removeListener(getAppEventName(this._firestore, `onDocumentSnapshot:${listenerId}`), listener);
SharedEventEmitter.removeListener(getAppEventName(this._firestore, `onDocumentSnapshotError:${listenerId}`), listener);
getNativeModule(this._firestore)
.documentOffSnapshot(this.path, listenerId);
}
}