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import { MiddlwareTarget } from '../models/middlware-target.ts';import { Response, ServerRequest, RenderResult, ServerResponse } from '../mod.ts';
export class CorsBuilder implements MiddlwareTarget {    private headers: Map<string, string>;    private allowAnyOrigin: boolean;    private allowAnyMethod: boolean;    private allowAnyHeader: boolean;
    constructor() {        this.headers = new Map();        this.allowAnyOrigin = false;        this.allowAnyMethod = false;        this.allowAnyHeader = false;    }
    onPreRequest(request: ServerRequest, response: ServerResponse): Promise<void> {        return new Promise((resolve, reject) => {            if (this.allowAnyOrigin) {                this.headers.set('Access-Control-Allow-Origin', request.headers.get('Origin') || '');            }            if (this.allowAnyMethod) {                this.headers.set(                    'Access-Control-Allow-Methods',                    request.headers.get('Access-Control-Request-Method') || '',                );            }            if (this.allowAnyHeader) {                this.headers.set(                    'Access-Control-Allow-Headers',                    request.headers.get('Access-Control-Request-Headers') || '',                );            }
            if (request.method == 'OPTIONS') {                this.onPostRequest(request, response, response as RenderResult);
                response.status = 200;                response.immediately = true;            }
            resolve();        });    }
    onPostRequest(request: ServerRequest, responce: Response, result?: RenderResult): Promise<void> {        return new Promise((resolve, rej) => {            this.headers.forEach((el, key) => {                if (result && result.headers) {                    result.headers.set(key, el);                }            });            resolve();        });    }
    WithOrigins(origins: string) {        this.headers.set('Access-Control-Allow-Origin', origins);        return this;    }
    WithMethods(methods: string) {        this.headers.set('Access-Control-Allow-Methods', methods);        return this;    }
    WithHeaders(headers: string) {        this.headers.set('Access-Control-Allow-Headers', headers);        return this;    }
    AllowAnyOrigin() {        this.allowAnyOrigin = true;        return this;    }
    AllowAnyMethod() {        this.allowAnyMethod = true;        return this;    }
    AllowAnyHeader() {        this.allowAnyHeader = true;        return this;    }
    AllowCredentials() {        this.headers.set('Access-Control-Allow-Credentials', 'true');        return this;    }}