Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 | 4x 4x 4x 4x 4x 4x 70x 4x 42x 42x 42x 48x 48x 48x 48x 1x 3x 2x 1x 1x 1x 66x 13x 13x 13x 13x 3x 3x 6x 4x 3x 2x 2x 2x 2x 1x 56x 56x 55x 54x 54x 54x 54x 53x 53x 49x 52x 11x 4x 11x 2x 2x 1x 1x 5x 4x 4x 3x 3x 3x 1x 47x 5x 5x 4x | 'use strict';
import * as _ from 'lodash';
import {asyncScheduler} from 'rxjs';
import {filter, throttleTime} from 'rxjs/operators';
import AStore from './a.store';
import EStoreType from '../enums/store.type.enum';
import IObservableBackend from '../backend/i.observable.backend';
import getHrtimeAsNumber from '../functions/performance/get.hrtime.as.number';
// tslint:disable-next-line:variable-name
const _getIdFromQuery = (query: any): string => (_.isString(query) ? query : _.get(query, '_id', '').toString());
export default class DocumentStore extends AStore {
constructor(backend: IObservableBackend, target: string) {
super(backend, target);
this._type = EStoreType.DOCUMENT;
Object.setPrototypeOf(this, DocumentStore.prototype);
}
protected extractFromConfig(): void {
super.extractFromConfig();
const {skip = 0} = this._config;
this._paging = skip ? {} : {skip, limit: 1};
}
public restartSubscription(): void {
this.subscription = this._backend
.changes() //
.pipe(throttleTime(this._delay, asyncScheduler, {leading: true, trailing: true}))
.pipe(filter((change) => this._pipeFilter(change)))
.subscribe({
next: (change: any): void => {
this.load(change) //
.then((): null => null)
.catch((e: any): void => this.error(e));
},
error: (e: any): void => this.error(e),
complete: (): void => this.complete()
});
}
protected shouldReload(change: any): boolean {
if (this.isInitialSubscription(change)) return true;
const id: string = _getIdFromQuery(this._query);
const {operationType: type, documentKey, updateDescription: description} = change;
const key = _.get(documentKey, '_id', '').toString();
switch (type) {
case 'delete':
return true;
case 'insert':
return !id;
case 'replace':
case 'update': {
if (id && id === key) return true;
if (!description) return true;
if (!this.shouldConsiderFields()) return true;
const {updatedFields, removedFields} = description;
const us: any[] = _.concat(removedFields, _.keys(updatedFields));
const qs: string[] = _.keys(this._fields);
return !_.isEmpty(_.intersection(qs, us));
}
}
return false;
}
protected async load(change: any): Promise<void> {
const startTime: number = getHrtimeAsNumber();
if (_.isEmpty(this._config)) return this.emitOne(startTime, this._subscriptionId);
if (!this.shouldReload(change)) return;
const id: string = _getIdFromQuery(this._query);
const {operationType: type, documentKey} = change;
const key = _.get(documentKey, '_id', '').toString();
if (type === 'delete' && id === key) return this.emitDelete(startTime, this._subscriptionId, key);
try {
let data;
if (!_.isEmpty(this._sort)) data = await this._loadSortedFirstDocument();
else data = id ? await this._loadDocumentById(id) : await this._loadDocument();
if (!data) return this.emitOne(startTime, this._subscriptionId);
for (const populate of this._populates) {
await this._backend.populate(data, populate);
}
if (_.isEmpty(this._virtuals)) return this.emitOne(startTime, this._subscriptionId, this._backend.toJSON(data));
const jsonData: any = await this._backend.resolveVirtuals(data, this._virtuals);
this.emitOne(startTime, this._subscriptionId, jsonData);
} catch (error) {
console.error('[@owservable/core] -> DocumentStore::load Error:', {change, error});
this.emitError(startTime, this._subscriptionId, error);
}
}
private _pipeFilter(change: any): boolean {
if (!_.isEmpty(this._sort)) return true;
const {operationType: type} = change;
if ('delete' === type) return true;
const {documentKey, fullDocument: document} = change;
const key = _.get(documentKey, '_id', '').toString();
if (key === _getIdFromQuery(this._query)) return true;
return this.testDocument(document);
}
private async _loadDocumentById(id: string): Promise<any> {
return this._backend.findById(id, this._fields, []);
}
private async _loadSortedFirstDocument(): Promise<any> {
const docs: any = await this._backend.find(this._query, this._fields, this._paging, this._sort, []);
return _.first(docs);
}
private async _loadDocument(): Promise<any> {
return this._backend.findOne(this._query, this._fields, []);
}
}
|