tezx/core/context.js

TezX is a high-performance, lightweight JavaScript framework designed for speed, scalability, and flexibility. It enables efficient routing, middleware management, and static file serving with minimal configuration. Fully compatible with Node.js, Deno, an

import { State } from "../utils/state.js";
import { defaultMimeType, mimeTypes } from "../utils/staticFile.js";
import { toWebRequest } from "../utils/toWebRequest.js";
import { GlobalConfig } from "./config.js";
import { Environment } from "./environment.js";
import { Request as RequestParser } from "./request.js";
export class Context {
    rawRequest;
    env = {};
    headers = new Headers();
    pathname;
    url;
    method;
    #status = 200;
    state = new State();
    #params = {};
    resBody;
    #body;
    #options;
    constructor(req, options) {
        this.#options = options;
        this.method = req?.method?.toUpperCase();
        if (GlobalConfig.adapter == "node") {
            let request = toWebRequest(req, this.method);
            this.url = request.url;
            this.rawRequest = request;
        }
        else {
            this.url = req.url;
            this.rawRequest = req;
        }
        this.pathname = this.req.urlRef.pathname;
    }
    header(key, value, options) {
        let append = options?.append;
        if (append) {
            this.headers.append(key, value);
        }
        else {
            this.headers.set(key, value);
        }
        return this;
    }
    get cookies() {
        const c = this.req.headers.get("cookie");
        let cookies = {};
        if (typeof c == "string") {
            const cookieHeader = c.split(";");
            for (const pair of cookieHeader) {
                const [key, value] = pair?.trim()?.split("=");
                cookies[key] = decodeURIComponent(value);
            }
        }
        return {
            get: (cookie) => {
                return cookies?.[cookie];
            },
            all: () => {
                return cookies;
            },
            delete: (name, options) => {
                const value = "";
                const cookieOptions = {
                    ...options,
                    expires: new Date(0),
                };
                const cookieHeader = `${name}=${value};${serializeOptions(cookieOptions)}`;
                this.headers.set("Set-Cookie", cookieHeader);
            },
            set: (name, value, options) => {
                const cookieHeader = `${name}=${value};${serializeOptions(options || {})}`;
                this.headers.set("Set-Cookie", cookieHeader);
            },
        };
    }
    json(body, ...args) {
        let status = this.#status;
        let headers = {
            "Content-Type": "application/json; charset=utf-8",
        };
        if (typeof args[0] === "number") {
            status = args[0];
            if (typeof args[1] === "object") {
                headers = { ...headers, ...args[1] };
            }
        }
        else if (typeof args[0] === "object") {
            headers = { ...headers, ...args[0] };
        }
        return this.#handleResponse(JSON.stringify(body), {
            status: status,
            headers: headers,
        });
    }
    send(body, ...args) {
        let status = this.#status;
        let headers = {};
        if (typeof args[0] === "number") {
            status = args[0];
            if (typeof args[1] === "object") {
                headers = args[1];
            }
        }
        else if (typeof args[0] === "object") {
            headers = args[0];
        }
        const contentTypeHeader = headers["Content-Type"] || headers["content-type"] || "";
        if (!contentTypeHeader) {
            if (typeof body === "string") {
                headers["Content-Type"] = "text/plain; charset=utf-8";
            }
            else if (typeof body === "number" || typeof body === "boolean") {
                headers["Content-Type"] = "text/plain; charset=utf-8";
            }
            else if (typeof body === "object" &&
                body !== null &&
                !(body instanceof ReadableStream)) {
                headers["Content-Type"] = "application/json; charset=utf-8";
                body = JSON.stringify(body);
            }
            else {
                headers["Content-Type"] = "application/octet-stream";
            }
        }
        return this.#handleResponse(body, {
            status: status,
            headers,
        });
    }
    html(strings, ...args) {
        let status = this.#status;
        let data = strings;
        if (Array.isArray(strings)) {
            data = strings.reduce((result, str, i) => {
                const value = args?.[i] ?? "";
                return result + str + value;
            }, "");
        }
        let headers = {
            "Content-Type": "text/html; charset=utf-8",
        };
        if (typeof args[0] === "number") {
            status = args[0];
            if (typeof args[1] === "object") {
                headers = { ...headers, ...args[1] };
            }
        }
        else if (typeof args[0] === "object") {
            headers = { ...headers, ...args[0] };
        }
        return this.#handleResponse(data, {
            status: status,
            headers: headers,
        });
    }
    text(data, ...args) {
        let status = this.#status;
        let headers = {
            "Content-Type": "text/plain; charset=utf-8",
        };
        if (typeof args[0] === "number") {
            status = args[0];
            if (typeof args[1] === "object") {
                headers = { ...headers, ...args[1] };
            }
        }
        else if (typeof args[0] === "object") {
            headers = { ...headers, ...args[0] };
        }
        return this.#handleResponse(data, {
            status: status,
            headers: headers,
        });
    }
    xml(data, ...args) {
        let status = this.#status;
        let headers = {
            "Content-Type": "application/xml; charset=utf-8",
        };
        if (typeof args[0] === "number") {
            status = args[0];
            if (typeof args[1] === "object") {
                headers = { ...headers, ...args[1] };
            }
        }
        else if (typeof args[0] === "object") {
            headers = { ...headers, ...args[0] };
        }
        return this.#handleResponse(data, {
            status: status,
            headers: headers,
        });
    }
    status = (status) => {
        this.#status = status;
        return this;
    };
    set setStatus(status) {
        this.#status = status;
    }
    get getStatus() {
        return this.#status;
    }
    redirect(url, status = 302) {
        return new Response(null, {
            status: status,
            headers: { Location: url },
        });
    }
    async download(filePath, fileName) {
        try {
            let fileExists = false;
            const runtime = Environment.getEnvironment;
            if (runtime === "node") {
                const { existsSync } = await import("node:fs");
                fileExists = existsSync(filePath);
            }
            else if (runtime === "bun") {
                fileExists = Bun.file(filePath).exists();
            }
            else if (runtime === "deno") {
                try {
                    await Deno.stat(filePath);
                    fileExists = true;
                }
                catch {
                    fileExists = false;
                }
            }
            if (!fileExists) {
                throw Error("File not found");
            }
            let fileBuffer;
            if (runtime === "node") {
                const { readFileSync } = await import("node:fs");
                fileBuffer = await readFileSync(filePath);
            }
            else if (runtime === "bun") {
                fileBuffer = await Bun.file(filePath)
                    .arrayBuffer()
                    .then((buf) => new Uint8Array(buf));
            }
            else if (runtime === "deno") {
                fileBuffer = await Deno.readFile(filePath);
            }
            return this.#handleResponse(fileBuffer, {
                status: 200,
                headers: {
                    "Content-Disposition": `attachment; filename="${fileName}"`,
                    "Content-Type": "application/octet-stream",
                    "Content-Length": fileBuffer.byteLength.toString(),
                },
            });
        }
        catch (error) {
            throw Error("Internal Server Error" + error?.message);
        }
    }
    async sendFile(filePath, ...args) {
        try {
            const runtime = Environment.getEnvironment;
            const resolvedPath = filePath;
            let fileExists = false;
            if (runtime === "node") {
                const { existsSync } = await import("node:fs");
                fileExists = existsSync(resolvedPath);
            }
            else if (runtime === "bun") {
                fileExists = Bun.file(resolvedPath).exists();
            }
            else if (runtime === "deno") {
                try {
                    await Deno.stat(resolvedPath);
                    fileExists = true;
                }
                catch {
                    fileExists = false;
                }
            }
            if (!fileExists) {
                throw Error("File not found");
            }
            let fileSize = 0;
            if (runtime === "node") {
                const { statSync } = await import("node:fs");
                fileSize = statSync(resolvedPath).size;
            }
            else if (runtime === "bun") {
                fileSize = (await Bun.file(resolvedPath).arrayBuffer()).byteLength;
            }
            else if (runtime === "deno") {
                const fileInfo = await Deno.stat(resolvedPath);
                fileSize = fileInfo.size;
            }
            const ext = filePath.split(".").pop()?.toLowerCase() || "";
            const mimeType = mimeTypes[ext] || defaultMimeType;
            let fileStream;
            if (runtime === "node") {
                const { createReadStream } = await import("node:fs");
                fileStream = createReadStream(resolvedPath);
            }
            else if (runtime === "bun") {
                fileStream = Bun.file(resolvedPath).stream();
            }
            else if (runtime === "deno") {
                const file = await Deno.open(resolvedPath, { read: true });
                fileStream = file.readable;
            }
            let headers = {
                "Content-Type": mimeType,
                "Content-Length": fileSize.toString(),
            };
            let fileName = "";
            if (typeof args[0] === "string") {
                fileName = args[0];
                if (typeof args[1] === "object") {
                    headers = { ...headers, ...args[1] };
                }
            }
            else if (typeof args[0] === "object") {
                headers = { ...headers, ...args[0] };
            }
            if (fileName) {
                headers["Content-Disposition"] = `attachment; filename="${fileName}"`;
            }
            return this.#handleResponse(fileStream, {
                status: 200,
                headers,
            });
        }
        catch (error) {
            throw Error("Internal Server Error" + error?.message);
        }
    }
    #handleResponse(body, { headers, status }) {
        let response = new Response(body, {
            status: status,
            headers,
        });
        this.resBody = body;
        return response;
    }
    get req() {
        return new RequestParser({
            method: this.method,
            req: this.rawRequest,
            options: this.#options,
            params: this.#params,
        });
    }
    set params(params) {
        this.#params = params;
    }
    set body(body) {
        this.#body = body;
    }
    get body() {
        return this.#body;
    }
    get params() {
        return this.#params;
    }
}
function serializeOptions(options) {
    const parts = [];
    if (options.maxAge) {
        parts.push(`Max-Age=${options.maxAge}`);
    }
    if (options.expires) {
        parts.push(`Expires=${options.expires.toUTCString()}`);
    }
    if (options.path) {
        parts.push(`Path=${options.path}`);
    }
    if (options.domain) {
        parts.push(`Domain=${options.domain}`);
    }
    if (options.secure) {
        parts.push(`Secure`);
    }
    if (options.httpOnly) {
        parts.push(`HttpOnly`);
    }
    if (options.sameSite) {
        parts.push(`SameSite=${options.sameSite}`);
    }
    return parts.join("; ");
}