69 lines
1.6 KiB
JavaScript
69 lines
1.6 KiB
JavaScript
/**
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* @flow
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* DocumentSnapshot representation wrapper
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*/
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import DocumentReference from './DocumentReference';
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import FieldPath from './FieldPath';
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import Path from './Path';
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import { isObject } from '../../utils';
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import { parseNativeMap } from './utils/serialize';
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import type Firestore from './';
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import type { NativeDocumentSnapshot, SnapshotMetadata } from './types';
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const extractFieldPathData = (data: Object | void, segments: string[]): any => {
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if (!data || !isObject(data)) {
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return undefined;
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}
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const pathValue = data[segments[0]];
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if (segments.length === 1) {
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return pathValue;
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}
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return extractFieldPathData(pathValue, segments.slice(1));
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};
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/**
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* @class DocumentSnapshot
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*/
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export default class DocumentSnapshot {
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_data: Object | void;
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_metadata: SnapshotMetadata;
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_ref: DocumentReference;
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constructor(firestore: Firestore, nativeData: NativeDocumentSnapshot) {
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this._data = parseNativeMap(firestore, nativeData.data);
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this._metadata = nativeData.metadata;
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this._ref = new DocumentReference(
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firestore,
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Path.fromName(nativeData.path)
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);
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}
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get exists(): boolean {
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return this._data !== undefined;
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}
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get id(): string | null {
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return this._ref.id;
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}
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get metadata(): SnapshotMetadata {
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return this._metadata;
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}
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get ref(): DocumentReference {
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return this._ref;
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}
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data(): Object | void {
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return this._data;
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}
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get(fieldPath: string | FieldPath): any {
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if (fieldPath instanceof FieldPath) {
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return extractFieldPathData(this._data, fieldPath._segments);
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}
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return this._data ? this._data[fieldPath] : undefined;
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}
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}
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