Merge branch 'master' of https://github.com/browngraphicslab/Dash-Web into pen

1 files changed, 152 insertions, 0 deletions

diff --git a/src/server/ActionUtilities.ts b/src/server/ActionUtilities.ts
new file mode 100644
index 000000000..a93566fb1
--- /dev/null
+++ b/src/server/ActionUtilities.ts
@@ -0,0 +1,152 @@
+import { readFile, writeFile, exists, mkdir, unlink, createWriteStream } from 'fs';
+import { ExecOptions } from 'shelljs';
+import { exec } from 'child_process';
+import * as path from 'path';
+import * as rimraf from "rimraf";
+import { yellow, Color } from 'colors';
+import * as nodemailer from "nodemailer";
+import { MailOptions } from "nodemailer/lib/json-transport";
+
+const projectRoot = path.resolve(__dirname, "../../");
+export function pathFromRoot(relative?: string) {
+    if (!relative) {
+        return projectRoot;
+    }
+    return path.resolve(projectRoot, relative);
+}
+
+export async function fileDescriptorFromStream(path: string) {
+    const logStream = createWriteStream(path);
+    return new Promise<number>(resolve => logStream.on("open", resolve));
+}
+
+export const command_line = (command: string, fromDirectory?: string) => {
+    return new Promise<string>((resolve, reject) => {
+        const options: ExecOptions = {};
+        if (fromDirectory) {
+            options.cwd = fromDirectory ? path.resolve(projectRoot, fromDirectory) : projectRoot;
+        }
+        exec(command, options, (err, stdout) => err ? reject(err) : resolve(stdout));
+    });
+};
+
+export const read_text_file = (relativePath: string) => {
+    const target = path.resolve(__dirname, relativePath);
+    return new Promise<string>((resolve, reject) => {
+        readFile(target, (err, data) => err ? reject(err) : resolve(data.toString()));
+    });
+};
+
+export const write_text_file = (relativePath: string, contents: any) => {
+    const target = path.resolve(__dirname, relativePath);
+    return new Promise<void>((resolve, reject) => {
+        writeFile(target, contents, (err) => err ? reject(err) : resolve());
+    });
+};
+
+export type Messager<T> = (outcome: { result: T | undefined, error: Error | null }) => string;
+
+export interface LogData<T> {
+    startMessage: string;
+    // if you care about the execution informing your log, you can pass in a function that takes in the result and a potential error and decides what to write
+    endMessage: string | Messager<T>;
+    action: () => T | Promise<T>;
+    color?: Color;
+}
+
+let current = Math.ceil(Math.random() * 20);
+export async function log_execution<T>({ startMessage, endMessage, action, color }: LogData<T>): Promise<T | undefined> {
+    let result: T | undefined = undefined, error: Error | null = null;
+    const resolvedColor = color || `\x1b[${31 + ++current % 6}m%s\x1b[0m`;
+    log_helper(`${startMessage}...`, resolvedColor);
+    try {
+        result = await action();
+    } catch (e) {
+        error = e;
+    } finally {
+        log_helper(typeof endMessage === "string" ? endMessage : endMessage({ result, error }), resolvedColor);
+    }
+    return result;
+}
+
+function log_helper(content: string, color: Color | string) {
+    if (typeof color === "string") {
+        console.log(color, content);
+    } else {
+        console.log(color(content));
+    }
+}
+
+export function logPort(listener: string, port: number) {
+    console.log(`${listener} listening on port ${yellow(String(port))}`);
+}
+
+export function msToTime(duration: number) {
+    const milliseconds = Math.floor((duration % 1000) / 100),
+        seconds = Math.floor((duration / 1000) % 60),
+        minutes = Math.floor((duration / (1000 * 60)) % 60),
+        hours = Math.floor((duration / (1000 * 60 * 60)) % 24);
+
+    const hoursS = (hours < 10) ? "0" + hours : hours;
+    const minutesS = (minutes < 10) ? "0" + minutes : minutes;
+    const secondsS = (seconds < 10) ? "0" + seconds : seconds;
+
+    return hoursS + ":" + minutesS + ":" + secondsS + "." + milliseconds;
+}
+
+export const createIfNotExists = async (path: string) => {
+    if (await new Promise<boolean>(resolve => exists(path, resolve))) {
+        return true;
+    }
+    return new Promise<boolean>(resolve => mkdir(path, error => resolve(error === null)));
+};
+
+export async function Prune(rootDirectory: string): Promise<boolean> {
+    const error = await new Promise<Error>(resolve => rimraf(rootDirectory, resolve));
+    return error === null;
+}
+
+export const Destroy = (mediaPath: string) => new Promise<boolean>(resolve => unlink(mediaPath, error => resolve(error === null)));
+
+export namespace Email {
+
+    const smtpTransport = nodemailer.createTransport({
+        service: 'Gmail',
+        auth: {
+            user: 'brownptcdash@gmail.com',
+            pass: 'browngfx1'
+        }
+    });
+
+    export interface DispatchFailure {
+        recipient: string;
+        error: Error;
+    }
+
+    export async function dispatchAll(recipients: string[], subject: string, content: string) {
+        const failures: DispatchFailure[] = [];
+        await Promise.all(recipients.map(async (recipient: string) => {
+            let error: Error | null;
+            if ((error = await Email.dispatch(recipient, subject, content)) !== null) {
+                failures.push({
+                    recipient,
+                    error
+                });
+            }
+        }));
+        return failures.length ? failures : undefined;
+    }
+
+    export async function dispatch(recipient: string, subject: string, content: string): Promise<Error | null> {
+        const mailOptions = {
+            to: recipient,
+            from: 'brownptcdash@gmail.com',
+            subject,
+            text: `Hello ${recipient.split("@")[0]},\n\n${content}`
+        } as MailOptions;
+        return new Promise<Error | null>(resolve => {
+            smtpTransport.sendMail(mailOptions, resolve);
+        });
+    }
+
+}
\ No newline at end of file