All files init.ts

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import * as fs from 'fs';
import {
  Config,
  MATCHES_NO,
  UTF8,
} from './constants';
import * as logger from './logger';
import {
  createStringFromConfig,
  getConfigPath,
  getProjectName,
  readWtfJson,
  writeConfigCallback,
} from './utils';
 
type TempRoute = Partial<{
  process: string;
  url: string;
}>;
 
export type ValueOrFunction<V> = V | (() => V);
export type Callback = (input: string) => any;
export type Condition = ValueOrFunction<boolean>;
 
export interface Question {
  message: ValueOrFunction<string>;
  callback: Callback;
  condition: Condition;
}
 
let config: Config | undefined;
let tempRoute: TempRoute = {};
 
const createConfig = (): Config => {
  const routes = tempRoute.process ? {[tempRoute.process]: tempRoute.url as string} : {};
  const projectName = getProjectName();
 
  return {
    ...config,
    [projectName]: {
      routes,
    },
  };
};
 
export const QUESTIONS: Question[] = [
  {
    message: 'What is the name of the process you would like to route?',
    condition: true,
    callback: (value: string | undefined) => {
      tempRoute.process = value;
    },
  },
  {
    message: 'From what url would you like to route this process?',
    condition: () => Boolean(tempRoute.process),
    callback: (value: string | undefined) => {
      tempRoute.url = value;
    },
  },
  {
    message: () => {
      const projectName = getProjectName();
      const createdConfig = createConfig();
      const stringConfig = createStringFromConfig(createdConfig[projectName]);
 
      return `\nCreated config:\n\n${stringConfig}\nIs this correct? [y]`;
    },
    condition: true,
    callback: (input: string) => {
      if (MATCHES_NO.test(input)) {
        process.exit(0);
      }
    },
  },
];
 
const askForInput = (question: Question, callback: () => any) => {
  if (
    (typeof question.condition === 'boolean' && question.condition) ||
    (typeof question.condition === 'function' && question.condition())
  ) {
    process.stdin.resume();
 
    logger.log((typeof question.message === 'function' ? question.message() : question.message) + ' ');
 
    process.stdin.once('data', (data) => {
      process.stdin.pause();
 
      const input: string = (data || '').toString().trim();
 
      question.callback(input);
 
      callback();
    });
  } else {
    callback();
  }
};
 
export const askQuestions = (questions: Question[], callback: () => any) => {
  const [question, ...remainingQuestions] = questions;
 
  if (!question) {
    callback();
    return;
  }
 
  askForInput(question, () => {
    askQuestions(remainingQuestions, callback);
  });
};
 
export const writeFile = () => {
  const configPath = getConfigPath();
  const createdConfig = createConfig();
  const stringConfig = createStringFromConfig(createdConfig);
 
  fs.writeFile(
    configPath,
    stringConfig,
    UTF8,
    writeConfigCallback
  );
};
 
const init = () => {
  tempRoute = {};
 
  const configPath = getConfigPath();
 
  if (fs.existsSync(configPath)) {
    config = readWtfJson(configPath);
    askQuestions(QUESTIONS, writeFile);
  } else {
    logger.log(`No wtf.json found at ${configPath}. I\'ll create that for you`);
    config = {};
    askQuestions(QUESTIONS, writeFile);
  }
};
 
export default init;