app.js

var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
var graphqlHTTP = require('express-graphql')

var indexRouter = require('./routes/index');
var schema = require('./graphql/schema');
var { getRecipes, getAverageCalorieCount, getRecipesByNumOfIngredients, getRecipesByPrepTime } = require('./graphql/resolvers.js');

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', indexRouter);

var root = {
  recipes: getRecipes,
  averageCalorieCount: getAverageCalorieCount,
  numOfIngredients: getRecipesByNumOfIngredients,
  preparationTime: getRecipesByPrepTime
}

app.use('/graphql', graphqlHTTP({
  schema: schema,
  rootValue: root
}));

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;