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// Importsimport type { HeaderValue } from "../types.ts";import { Status, contentType, extname, STATUS_TEXT } from "../deps.ts";import { Pair } from "./Pair.ts";import { ResponseHeaders } from "./ResponseHeaders.ts";
/** * A response object. */export class Response{		public get WRITABLE (): boolean { return this.pair.WRITABLE; }		#filePath?: string;	#content: string = "" as string;	#statusCode: Status = Status.OK;		/** The headers to send back. */	public readonly headers: ResponseHeaders = new ResponseHeaders(this);		/** The status code to respond with. */	public get statusCode (): Status { return this.#statusCode; }	/** The status code to respond with. */	public set statusCode (code: Status)	{		if (!this.pair.WRITABLE)			throw new Error(Pair.NOT_WRITABLE);		this.#statusCode = code;	}		/** The body content. */	public get content (): string { return this.#content; }	/** The body content. */	public set content (chunk: string)	{		if (!this.pair.WRITABLE)			throw new Error(Pair.NOT_WRITABLE);		this.#content = chunk;	}		/**	 * Initiate a new response object.	 * @param pair The request/response pair object.	 */	public constructor (private readonly pair: Pair)	{			}		/**	 * Set the status code to respond with.	 * @param code The status code.	 * @returns for chainable purposes.	 */	public status (code: Status): this	{		if (!this.pair.WRITABLE)			throw new Error(Pair.NOT_WRITABLE);		this.statusCode = code;		return this;	}		/**	 * Write some data to the body.	 * @param chunk The chunk to add.	 */	public write (chunk?: string): this	{		if (!this.pair.WRITABLE)			throw new Error(Pair.NOT_WRITABLE);		if (chunk) this.content += chunk;		return this;	}		/**	 * Send file contents in response. File contents are loaded in	 * .end().	 * @param path The file path to read.	 */	public file (path: string): this	{		this.#filePath = path;		return this;	}		/**	 * Send a json response and end the response.	 * @param data The data to send.	 */	// deno-lint-ignore no-explicit-any	public async json (data: any): Promise<this>	{		if (!this.pair.WRITABLE)			throw new Error(Pair.NOT_WRITABLE);		this.headers.set("Content-Type", "application/json; charset=utf-8");		return await this.end(JSON.stringify(data));	}		/**	 * Set the Content-Type response header.	 * @param type The MIME type.	 */	public type (type: string): this	{		this.headers.set("Content-Type", type);		return this;	}		/**	 * Send and end the response.	 * @param body A final piece of chunk to add in the response body.	 */	public async end (body?: string): Promise<this>	{		if (!this.pair.WRITABLE)			throw new Error(Pair.NOT_WRITABLE);		this.pair.ENDING = true;		if (body) this.#content += body;		const headers = this.headers.toHeadersObject();		if (this.#filePath)		{			this.#content = await Deno.readTextFile(this.#filePath);			headers.set("Content-Type", contentType(extname(this.#filePath)) || "text/plain; charset=utf-8");		}		let err: Error | null = null;		try		{			headers.set("Content-Length", this.#content.length.toString());			headers.set("X-Powered-By", "Texa");			if (!this.content && this.statusCode >= 400)				this.#content = STATUS_TEXT.has(this.statusCode) ? `${this.statusCode} - ${STATUS_TEXT.get(this.statusCode)}` : "";			await this.pair._request.respond({				body: this.#content,				headers: headers,				status: this.#statusCode			});		} catch (error)		{			err = error;		}		this.pair.ENDED = true;		this.pair.ENDING = false;		if (err) throw err;		return this;	}		/**	 * **Alias**: <Response>.headers.get(key: string)	 */	public get (key: string): HeaderValue | void	{		return this.headers.get(key);	}		/**	 * **Alias**: <Response>.headers.set(key: string, value: HeaderValue)	 * @returns Response object.	 */	public set (key: string, value: HeaderValue): this	{		this.headers.set(key, value);		return this;	}		/**	 * **Alias**: <Response>.headers.has(key: string)	 */	public has (key: string): boolean	{		return this.headers.has(key);	}		/**	 * **Alias**: <Response>.headers.delete(key: string)	 * @returns Response object.	 */	public delete (key: string): this	{		this.headers.delete(key);		return this;	}	}