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Application.ts
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Application.ts
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import { OperatingSystem } from './OperatingSystem';
import type { IApplication } from './IApplication';
import type { ICategoryCollection } from './Collection/ICategoryCollection';
import type { ProjectDetails } from './Project/ProjectDetails';
export class Application implements IApplication {
constructor(
public projectDetails: ProjectDetails,
public collections: readonly ICategoryCollection[],
) {
validateCollections(collections);
}
public getSupportedOsList(): OperatingSystem[] {
return this.collections.map((collection) => collection.os);
}
public getCollection(operatingSystem: OperatingSystem): ICategoryCollection {
const collection = this.collections.find((c) => c.os === operatingSystem);
if (!collection) {
throw new Error(`Operating system "${OperatingSystem[operatingSystem]}" is not defined in application`);
}
return collection;
}
}
function validateCollections(collections: readonly ICategoryCollection[]) {
if (!collections.length) {
throw new Error('missing collections');
}
if (collections.filter((c) => !c).length > 0) {
throw new Error('missing collection in the list');
}
const osList = collections.map((c) => c.os);
const duplicates = getDuplicates(osList);
if (duplicates.length > 0) {
throw new Error(`multiple collections with same os: ${
duplicates.map((os) => OperatingSystem[os].toLowerCase()).join('", "')}`);
}
}
function getDuplicates(list: readonly OperatingSystem[]): OperatingSystem[] {
return list.filter((os, index) => list.indexOf(os) !== index);
}