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6
src/helpers/char.ts
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6
src/helpers/char.ts
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export function timestampToReadable(timestamp?: number): string {
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const date: Date =
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timestamp && !isNaN(timestamp) ? new Date(timestamp) : new Date();
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if (isNaN(date.getTime())) return "Invalid Date";
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return date.toISOString().replace("T", " ").replace("Z", "");
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}
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26
src/helpers/ejs.ts
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26
src/helpers/ejs.ts
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import { renderFile } from "ejs";
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import { join } from "path";
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export async function renderEjsTemplate(
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viewName: string | string[],
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data: EjsTemplateData,
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headers?: Record<string, string | number | boolean>,
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): Promise<Response> {
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let templatePath: string;
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if (Array.isArray(viewName)) {
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templatePath = join(__dirname, "..", "views", ...viewName);
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} else {
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templatePath = join(__dirname, "..", "views", `${viewName}`);
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}
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if (!templatePath.endsWith(".ejs")) {
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templatePath += ".ejs";
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}
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const html: string = await renderFile(templatePath, data);
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return new Response(html, {
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headers: { "Content-Type": "text/html", ...headers },
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});
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}
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175
src/helpers/logger.ts
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175
src/helpers/logger.ts
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import { environment } from "@config/environment";
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import type { Stats } from "fs";
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import {
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createWriteStream,
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existsSync,
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mkdirSync,
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statSync,
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WriteStream,
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} from "fs";
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import { EOL } from "os";
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import { basename, join } from "path";
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import { timestampToReadable } from "./char";
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class Logger {
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private static instance: Logger;
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private static log: string = join(__dirname, "../../logs");
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public static getInstance(): Logger {
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if (!Logger.instance) {
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Logger.instance = new Logger();
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}
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return Logger.instance;
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}
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private writeToLog(logMessage: string): void {
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if (environment.development) return;
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const date: Date = new Date();
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const logDir: string = Logger.log;
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const logFile: string = join(
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logDir,
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`${date.getFullYear()}-${date.getMonth() + 1}-${date.getDate()}.log`,
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);
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if (!existsSync(logDir)) {
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mkdirSync(logDir, { recursive: true });
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}
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let addSeparator: boolean = false;
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if (existsSync(logFile)) {
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const fileStats: Stats = statSync(logFile);
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if (fileStats.size > 0) {
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const lastModified: Date = new Date(fileStats.mtime);
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if (
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lastModified.getFullYear() === date.getFullYear() &&
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lastModified.getMonth() === date.getMonth() &&
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lastModified.getDate() === date.getDate() &&
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lastModified.getHours() !== date.getHours()
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) {
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addSeparator = true;
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}
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}
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}
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const stream: WriteStream = createWriteStream(logFile, { flags: "a" });
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if (addSeparator) {
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stream.write(`${EOL}${date.toISOString()}${EOL}`);
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}
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stream.write(`${logMessage}${EOL}`);
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stream.close();
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}
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private extractFileName(stack: string): string {
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const stackLines: string[] = stack.split("\n");
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let callerFile: string = "";
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for (let i: number = 2; i < stackLines.length; i++) {
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const line: string = stackLines[i].trim();
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if (line && !line.includes("Logger.") && line.includes("(")) {
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callerFile = line.split("(")[1]?.split(")")[0] || "";
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break;
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}
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}
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return basename(callerFile);
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}
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private getCallerInfo(stack: unknown): {
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filename: string;
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timestamp: string;
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} {
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const filename: string =
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typeof stack === "string" ? this.extractFileName(stack) : "unknown";
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const readableTimestamp: string = timestampToReadable();
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return { filename, timestamp: readableTimestamp };
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}
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public info(message: string | string[], breakLine: boolean = false): void {
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const stack: string = new Error().stack || "";
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const { filename, timestamp } = this.getCallerInfo(stack);
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const joinedMessage: string = Array.isArray(message)
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? message.join(" ")
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: message;
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const logMessageParts: ILogMessageParts = {
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readableTimestamp: { value: timestamp, color: "90" },
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level: { value: "[INFO]", color: "32" },
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filename: { value: `(${filename})`, color: "36" },
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message: { value: joinedMessage, color: "0" },
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};
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this.writeToLog(`${timestamp} [INFO] (${filename}) ${joinedMessage}`);
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this.writeConsoleMessageColored(logMessageParts, breakLine);
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}
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public warn(message: string | string[], breakLine: boolean = false): void {
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const stack: string = new Error().stack || "";
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const { filename, timestamp } = this.getCallerInfo(stack);
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const joinedMessage: string = Array.isArray(message)
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? message.join(" ")
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: message;
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const logMessageParts: ILogMessageParts = {
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readableTimestamp: { value: timestamp, color: "90" },
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level: { value: "[WARN]", color: "33" },
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filename: { value: `(${filename})`, color: "36" },
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message: { value: joinedMessage, color: "0" },
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};
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this.writeToLog(`${timestamp} [WARN] (${filename}) ${joinedMessage}`);
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this.writeConsoleMessageColored(logMessageParts, breakLine);
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}
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public error(
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message: string | string[] | Error | Error[],
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breakLine: boolean = false,
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): void {
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const stack: string = new Error().stack || "";
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const { filename, timestamp } = this.getCallerInfo(stack);
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const messages: (string | Error)[] = Array.isArray(message)
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? message
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: [message];
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const joinedMessage: string = messages
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.map((msg: string | Error): string =>
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typeof msg === "string" ? msg : msg.message,
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)
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.join(" ");
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const logMessageParts: ILogMessageParts = {
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readableTimestamp: { value: timestamp, color: "90" },
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level: { value: "[ERROR]", color: "31" },
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filename: { value: `(${filename})`, color: "36" },
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message: { value: joinedMessage, color: "0" },
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};
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this.writeToLog(`${timestamp} [ERROR] (${filename}) ${joinedMessage}`);
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this.writeConsoleMessageColored(logMessageParts, breakLine);
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}
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private writeConsoleMessageColored(
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logMessageParts: ILogMessageParts,
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breakLine: boolean = false,
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): void {
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const logMessage: string = Object.keys(logMessageParts)
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.map((key: string) => {
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const part: ILogMessagePart = logMessageParts[key];
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return `\x1b[${part.color}m${part.value}\x1b[0m`;
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})
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.join(" ");
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console.log(logMessage + (breakLine ? EOL : ""));
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}
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}
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const logger: Logger = Logger.getInstance();
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export { logger };
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