/
segment-service.ts
163 lines (135 loc) · 5.02 KB
/
segment-service.ts
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import { IUnleashConfig } from '../types/option';
import { IEventStore } from '../types/stores/event-store';
import { IUnleashStores } from '../types';
import { Logger } from '../logger';
import NameExistsError from '../error/name-exists-error';
import { ISegmentStore } from '../types/stores/segment-store';
import { IFeatureStrategy, ISegment } from '../types/model';
import { segmentSchema } from './segment-schema';
import {
SEGMENT_CREATED,
SEGMENT_DELETED,
SEGMENT_UPDATED,
} from '../types/events';
import User from '../types/user';
import { IFeatureStrategiesStore } from '../types/stores/feature-strategies-store';
import BadDataError from '../error/bad-data-error';
import {
SEGMENT_VALUES_LIMIT,
STRATEGY_SEGMENTS_LIMIT,
} from '../util/segments';
export class SegmentService {
private logger: Logger;
private segmentStore: ISegmentStore;
private featureStrategiesStore: IFeatureStrategiesStore;
private eventStore: IEventStore;
constructor(
{
segmentStore,
featureStrategiesStore,
eventStore,
}: Pick<
IUnleashStores,
'segmentStore' | 'featureStrategiesStore' | 'eventStore'
>,
{ getLogger }: Pick<IUnleashConfig, 'getLogger'>,
) {
this.segmentStore = segmentStore;
this.featureStrategiesStore = featureStrategiesStore;
this.eventStore = eventStore;
this.logger = getLogger('services/segment-service.ts');
}
async get(id: number): Promise<ISegment> {
return this.segmentStore.get(id);
}
async getAll(): Promise<ISegment[]> {
return this.segmentStore.getAll();
}
async getActive(): Promise<ISegment[]> {
return this.segmentStore.getActive();
}
// Used by unleash-enterprise.
async getByStrategy(strategyId: string): Promise<ISegment[]> {
return this.segmentStore.getByStrategy(strategyId);
}
// Used by unleash-enterprise.
async getStrategies(id: number): Promise<IFeatureStrategy[]> {
return this.featureStrategiesStore.getStrategiesBySegment(id);
}
async create(data: unknown, user: User): Promise<void> {
const input = await segmentSchema.validateAsync(data);
this.validateSegmentValuesLimit(input);
await this.validateName(input.name);
const segment = await this.segmentStore.create(input, user);
await this.eventStore.store({
type: SEGMENT_CREATED,
createdBy: user.email || user.username,
data: segment,
});
}
async update(id: number, data: unknown, user: User): Promise<void> {
const input = await segmentSchema.validateAsync(data);
this.validateSegmentValuesLimit(input);
const preData = await this.segmentStore.get(id);
if (preData.name !== input.name) {
await this.validateName(input.name);
}
const segment = await this.segmentStore.update(id, input);
await this.eventStore.store({
type: SEGMENT_UPDATED,
createdBy: user.email || user.username,
data: segment,
preData,
});
}
async delete(id: number, user: User): Promise<void> {
const segment = this.segmentStore.get(id);
await this.segmentStore.delete(id);
await this.eventStore.store({
type: SEGMENT_DELETED,
createdBy: user.email || user.username,
data: segment,
});
}
// Used by unleash-enterprise.
async addToStrategy(id: number, strategyId: string): Promise<void> {
await this.validateStrategySegmentLimit(strategyId);
await this.segmentStore.addToStrategy(id, strategyId);
}
// Used by unleash-enterprise.
async removeFromStrategy(id: number, strategyId: string): Promise<void> {
await this.segmentStore.removeFromStrategy(id, strategyId);
}
async validateName(name: string): Promise<void> {
if (!name) {
throw new BadDataError('Segment name cannot be empty');
}
if (await this.segmentStore.existsByName(name)) {
throw new NameExistsError('Segment name already exists');
}
}
private async validateStrategySegmentLimit(
strategyId: string,
): Promise<void> {
const limit = STRATEGY_SEGMENTS_LIMIT;
if (typeof limit === 'undefined') {
return;
}
if ((await this.getByStrategy(strategyId)).length >= limit) {
throw new BadDataError(
`Strategies may not have more than ${limit} segments`,
);
}
}
private validateSegmentValuesLimit(segment: Omit<ISegment, 'id'>): void {
const limit = SEGMENT_VALUES_LIMIT;
const valuesCount = segment.constraints
.flatMap((constraint) => constraint.values?.length ?? 0)
.reduce((acc, length) => acc + length, 0);
if (valuesCount > limit) {
throw new BadDataError(
`Segments may not have more than ${limit} values`,
);
}
}
}