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import { Knex } from 'knex';
import {
FeatureEnvironmentKey,
IFeatureEnvironmentStore,
} from '../types/stores/feature-environment-store';
import { Logger, LogProvider } from '../logger';
import metricsHelper from '../util/metrics-helper';
import { DB_TIME } from '../metric-events';
import { IFeatureEnvironment } from '../types/model';
import NotFoundError from '../error/notfound-error';
const T = {
featureEnvs: 'feature_environments',
featureStrategies: 'feature_strategies',
};
interface IFeatureEnvironmentRow {
environment: string;
feature_name: string;
enabled: boolean;
}
export class FeatureEnvironmentStore implements IFeatureEnvironmentStore {
private db: Knex;
private logger: Logger;
private readonly timer: Function;
constructor(db: Knex, eventBus: EventEmitter, getLogger: LogProvider) {
this.db = db;
this.logger = getLogger('feature-environment-store.ts');
this.timer = (action) =>
metricsHelper.wrapTimer(eventBus, DB_TIME, {
store: 'feature-environments',
action,
});
}
async delete({
featureName,
environment,
}: FeatureEnvironmentKey): Promise<void> {
await this.db(T.featureEnvs)
.where('feature_name', featureName)
.andWhere('environment', environment)
.del();
}
async deleteAll(): Promise<void> {
await this.db(T.featureEnvs).del();
}
destroy(): void {}
async exists({
featureName,
environment,
}: FeatureEnvironmentKey): Promise<boolean> {
const result = await this.db.raw(
`SELECT EXISTS (SELECT 1 FROM ${T.featureEnvs} WHERE feature_name = ? AND environment = ?) AS present`,
[featureName, environment],
);
const { present } = result.rows[0];
return present;
}
async get({
featureName,
environment,
}: FeatureEnvironmentKey): Promise<IFeatureEnvironment> {
const md = await this.db(T.featureEnvs)
.where('feature_name', featureName)
.andWhere('environment', environment)
.first();
Iif (md) {
return {
enabled: md.enabled,
featureName,
environment,
};
}
throw new NotFoundError(
`Could not find ${featureName} in ${environment}`,
);
}
async getAll(query?: Object): Promise<IFeatureEnvironment[]> {
let rows = this.db(T.featureEnvs);
if (query) {
rows = rows.where(query);
}
return (await rows).map((r) => ({
enabled: r.enabled,
featureName: r.feature_name,
environment: r.environment,
}));
}
async disableEnvironmentIfNoStrategies(
featureName: string,
environment: string,
): Promise<void> {
const result = await this.db.raw(
`SELECT EXISTS (SELECT 1 FROM ${T.featureStrategies} WHERE feature_name = ? AND environment = ?) AS enabled`,
[featureName, environment],
);
const { enabled } = result.rows[0];
if (!enabled) {
await this.db(T.featureEnvs)
.update({ enabled: false })
.where({ feature_name: featureName, environment });
}
}
async addEnvironmentToFeature(
featureName: string,
environment: string,
enabled: boolean = false,
): Promise<void> {
await this.db('feature_environments')
.insert({ feature_name: featureName, environment, enabled })
.onConflict(['environment', 'feature_name'])
.merge('enabled');
}
// TODO: move to project store.
async disconnectFeatures(
environment: string,
project: string,
): Promise<void> {
const featureSelector = this.db('features')
.where({ project })
.select('name');
await this.db(T.featureEnvs)
.where({ environment })
.andWhere('feature_name', 'IN', featureSelector)
.del();
await this.db('feature_strategies').where({
environment,
project_name: project,
});
}
async featureHasEnvironment(
environment: string,
featureName: string,
): Promise<boolean> {
const result = await this.db.raw(
`SELECT EXISTS (SELECT 1 FROM ${T.featureEnvs} WHERE feature_name = ? AND environment = ?) AS present`,
[featureName, environment],
);
const { present } = result.rows[0];
return present;
}
async getEnvironmentMetaData(
environment: string,
featureName: string,
): Promise<IFeatureEnvironment> {
const md = await this.db(T.featureEnvs)
.where('feature_name', featureName)
.andWhere('environment', environment)
.first();
if (md) {
return {
enabled: md.enabled,
featureName,
environment,
};
}
throw new NotFoundError(
`Could not find ${featureName} in ${environment}`,
);
}
async isEnvironmentEnabled(
featureName: string,
environment: string,
): Promise<boolean> {
const row = await this.db(T.featureEnvs)
.select('enabled')
.where({ feature_name: featureName, environment })
.first();
return row.enabled;
}
async removeEnvironmentForFeature(
featureName: string,
environment: string,
): Promise<void> {
await this.db(T.featureEnvs)
.where({ feature_name: featureName, environment })
.del();
}
async setEnvironmentEnabledStatus(
environment: string,
featureName: string,
enabled: boolean,
): Promise<number> {
return this.db(T.featureEnvs).update({ enabled }).where({
environment,
feature_name: featureName,
enabled: !enabled,
});
}
async connectProject(
environment: string,
projectId: string,
): Promise<void> {
await this.db('project_environments').insert({
environment_name: environment,
project_id: projectId,
});
}
async connectFeatures(
environment: string,
projectId: string,
): Promise<void> {
const featuresToEnable = await this.db('features')
.select('name')
.where({
project: projectId,
});
const rows: IFeatureEnvironmentRow[] = featuresToEnable.map((f) => ({
environment,
feature_name: f.name,
enabled: false,
}));
if (rows.length > 0) {
await this.db<IFeatureEnvironmentRow>('feature_environments')
.insert(rows)
.onConflict(['environment', 'feature_name'])
.ignore();
}
}
async disconnectProject(
environment: string,
projectId: string,
): Promise<void> {
await this.db('project_environments')
.where({ environment_name: environment, project_id: projectId })
.del();
}
async connectFeatureToEnvironmentsForProject(
featureName: string,
projectId: string,
): Promise<void> {
const environmentsToEnable = await this.db('project_environments')
.select('environment_name')
.where({ project_id: projectId });
await Promise.all(
environmentsToEnable.map(async (env) => {
await this.db('feature_environments')
.insert({
environment: env.environment_name,
feature_name: featureName,
enabled: false,
})
.onConflict(['environment', 'feature_name'])
.ignore();
}),
);
}
}
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