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import { ValidationError } from 'joi';
import { getAddons, IAddonProviders } from '../addons';
import * as events from '../types/events';
import { addonSchema } from './addon-schema';
import NameExistsError from '../error/name-exists-error';
import { IEventStore } from '../types/stores/event-store';
import { IFeatureToggleStore } from '../types/stores/feature-toggle-store';
import { Logger } from '../logger';
import TagTypeService from './tag-type-service';
import { IAddon, IAddonDto, IAddonStore } from '../types/stores/addon-store';
import { IUnleashStores } from '../types/stores';
import { IUnleashConfig } from '../types/option';
import { IAddonDefinition } from '../types/model';
import { minutesToMilliseconds } from 'date-fns';
const SUPPORTED_EVENTS = Object.keys(events).map((k) => events[k]);
const MASKED_VALUE = '*****';
interface ISensitiveParams {
[key: string]: string[];
}
export default class AddonService {
eventStore: IEventStore;
addonStore: IAddonStore;
featureToggleStore: IFeatureToggleStore;
logger: Logger;
tagTypeService: TagTypeService;
addonProviders: IAddonProviders;
sensitiveParams: ISensitiveParams;
fetchAddonConfigs: (() => Promise<IAddon[]>) &
memoizee.Memoized<() => Promise<IAddon[]>>;
constructor(
{
addonStore,
eventStore,
featureToggleStore,
}: Pick<
IUnleashStores,
'addonStore' | 'eventStore' | 'featureToggleStore'
>,
{ getLogger, server }: Pick<IUnleashConfig, 'getLogger' | 'server'>,
tagTypeService: TagTypeService,
addons?: IAddonProviders,
) {
this.eventStore = eventStore;
this.addonStore = addonStore;
this.featureToggleStore = featureToggleStore;
this.logger = getLogger('services/addon-service.js');
this.tagTypeService = tagTypeService;
this.addonProviders =
addons ||
getAddons({
getLogger,
unleashUrl: server.unleashUrl,
});
this.sensitiveParams = this.loadSensitiveParams(this.addonProviders);
if (addonStore) {
this.registerEventHandler();
}
// Memoized private function
this.fetchAddonConfigs = memoizee(
async () => addonStore.getAll({ enabled: true }),
{
promise: true,
maxAge: minutesToMilliseconds(1),
},
);
}
loadSensitiveParams(addonProviders: IAddonProviders): ISensitiveParams {
const providerDefinitions = Object.values(addonProviders).map(
(p) => p.definition,
);
return providerDefinitions.reduce((obj, definition) => {
const sensitiveParams = definition.parameters
.filter((p) => p.sensitive)
.map((p) => p.name);
const o = { ...obj };
o[definition.name] = sensitiveParams;
return o;
}, {});
}
registerEventHandler(): void {
SUPPORTED_EVENTS.forEach((eventName) =>
this.eventStore.on(eventName, this.handleEvent(eventName)),
);
}
handleEvent(eventName: string): (IEvent) => void {
const { addonProviders } = this;
return (event) => {
this.fetchAddonConfigs().then((addonInstances) => {
addonInstances
.filter((addon) => addon.events.includes(eventName))
.filter((addon) => addonProviders[addon.provider])
.forEach((addon) =>
addonProviders[addon.provider].handleEvent(
event,
addon.parameters,
),
);
});
};
}
// Should be used by the controller.
async getAddons(): Promise<IAddon[]> {
const addonConfigs = await this.addonStore.getAll();
return addonConfigs.map((a) => this.filterSensitiveFields(a));
}
filterSensitiveFields(addonConfig: IAddon): IAddon {
const { sensitiveParams } = this;
const a = { ...addonConfig };
a.parameters = Object.keys(a.parameters).reduce((obj, paramKey) => {
const o = { ...obj };
if (sensitiveParams[a.provider].includes(paramKey)) {
o[paramKey] = MASKED_VALUE;
} else {
o[paramKey] = a.parameters[paramKey];
}
return o;
}, {});
return a;
}
async getAddon(id: number): Promise<IAddon> {
const addonConfig = await this.addonStore.get(id);
return this.filterSensitiveFields(addonConfig);
}
getProviderDefinitions(): IAddonDefinition[] {
const { addonProviders } = this;
return Object.values(addonProviders).map((p) => p.definition);
}
async addTagTypes(providerName: string): Promise<void> {
const provider = this.addonProviders[providerName];
if (provider) {
const tagTypes = provider.definition.tagTypes || [];
const createTags = tagTypes.map(async (tagType) => {
try {
await this.tagTypeService.validateUnique(tagType);
await this.tagTypeService.createTagType(
tagType,
providerName,
);
} catch (err) {
Iif (!(err instanceof NameExistsError)) {
this.logger.error(err);
}
}
});
await Promise.all(createTags);
}
return Promise.resolve();
}
async createAddon(data: IAddonDto, userName: string): Promise<IAddon> {
const addonConfig = await addonSchema.validateAsync(data);
await this.validateKnownProvider(addonConfig);
await this.validateRequiredParameters(addonConfig);
const createdAddon = await this.addonStore.insert(addonConfig);
await this.addTagTypes(createdAddon.provider);
this.logger.info(
`User ${userName} created addon ${addonConfig.provider}`,
);
await this.eventStore.store({
type: events.ADDON_CONFIG_CREATED,
createdBy: userName,
data: { provider: addonConfig.provider },
});
return createdAddon;
}
async updateAddon(
id: number,
data: IAddonDto,
userName: string,
): Promise<void> {
const addonConfig = await addonSchema.validateAsync(data);
await this.validateRequiredParameters(addonConfig);
if (this.sensitiveParams[addonConfig.provider].length > 0) {
const existingConfig = await this.addonStore.get(id);
addonConfig.parameters = Object.keys(addonConfig.parameters).reduce(
(params, key) => {
const o = { ...params };
if (addonConfig.parameters[key] === MASKED_VALUE) {
o[key] = existingConfig.parameters[key];
} else {
o[key] = addonConfig.parameters[key];
}
return o;
},
{},
);
}
await this.addonStore.update(id, addonConfig);
await this.eventStore.store({
type: events.ADDON_CONFIG_UPDATED,
createdBy: userName,
data: { id, provider: addonConfig.provider },
});
this.logger.info(`User ${userName} updated addon ${id}`);
}
async removeAddon(id: number, userName: string): Promise<void> {
await this.addonStore.delete(id);
await this.eventStore.store({
type: events.ADDON_CONFIG_DELETED,
createdBy: userName,
data: { id },
});
this.logger.info(`User ${userName} removed addon ${id}`);
}
async validateKnownProvider(config: Partial<IAddonDto>): Promise<boolean> {
const p = this.addonProviders[config.provider];
if (!p) {
throw new TypeError(`Unknown addon provider ${config.provider}`);
} else {
return true;
}
}
// eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
async validateRequiredParameters({
provider,
parameters,
}): Promise<boolean> {
const providerDefinition = this.addonProviders[provider].definition;
const requiredParamsMissing = providerDefinition.parameters
.filter((p) => p.required)
.map((p) => p.name)
.filter(
(requiredParam) =>
!Object.keys(parameters).includes(requiredParam),
);
if (requiredParamsMissing.length > 0) {
throw new ValidationError(
`Missing required parameters: ${requiredParamsMissing.join(
',',
)} `,
'',
undefined,
);
}
return true;
}
}
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