changes in code

Author: geekaryan

abc

@@ -0,0 +1,260 @@
+// const Tour = require('./../models/tourModel');
+
+// exports.aliasTopTour = (req, res, next) => {
+//   req.query.limit = '5';
+//   req.query.sort = '-ratigsAverage,price';
+//   req.query.fields = 'name,price,ratingsAverage,summary,difficulty';
+//   next();
+// };
+
+// class APIFeatures {
+//   constructor(query, queryString) {
+//     this.query = query;
+//     this.queryString = queryString;
+//   }
+//   filter() {
+//     const qureyObj = { ...this.queryString };
+//     //this line of code tell us which we have to delete from the site..
+//     const excludeFields = ['page', 'sort', 'limit', 'fields'];
+
+//     //loopiing forEach element in queryObj to delte it from the site....
+//     excludeFields.forEach((el) => delete qureyObj[el]);
+
+//     let queryStr = JSON.stringify(qureyObj);
+//     queryStr = queryStr.replace(/\b(gte|gt|lte|lt)\b/g, (match) => `$${match}`);
+//     console.log(JSON.parse(queryStr));
+
+//     //For greating or equal to...
+//     //{duration: 5, difficulty: { $gte: 5}}
+//     //{ duration: { gte: '6' }, difficulty: '5' }
+
+//     // const query = Tour.find(qureyObj);
+//     // let query = Tour.find(JSON.parse(queryStr));
+
+//     this.query = this.query.find(JSON.parse(queryStr));
+
+//     return this;
+//   }
+//   //req.query is replace by this.queryString..
+//   //query is replace by this.query..
+//   sort() {
+//     if (this.queryString.sort) {
+//       const sortBy = this.queryString.sort.split(',').join('');
+//       console.log(sortBy);
+//       // query = query.sort(req.query.sort);
+//       this.query = this.query.sort(sortBy);
+//     } else {
+//       //if not sort is added then we must sort it by the time it is created at...
+//       this.query = this.query.sort('-createdAt');
+//     }
+
+//     return this;
+//   }
+
+//   limitFields() {
+//     if (this.queryString.fields) {
+//       const fields = this.queryString.fields.split(',').join(' ');
+//       this.query = this.query.select(fields);
+//     } else {
+//       this.query = this.query.select('-__v');
+//     }
+
+//     return this;
+//   }
+
+//   paginate() {
+//     const page = this.queryString.page * 1 || 1; // || is used to defining the default values...
+//     const limit = this.queryString.limit * 1 || 100;
+//     console.log(page);
+
+//     //so here basically what we are doing is seeing that skip
+//     //contain the page - 1 * limit value in which limit is by default set to 10..
+//     const skip = (page - 1) * limit;
+//     //page=2&limit=10
+//     this.query = this.query.skip(skip).limit(limit);
+
+//     return this;
+//   }
+// }
+
+// exports.getAllTours = async (req, res) => {
+//   try {
+//     //==> BUILD A QUERY..
+//     //1)Filtering
+//     //this line of code get all the queries from the site..
+//     // const qureyObj = { ...req.query };
+//     // //this line of code tell us which we have to delete from the site..
+//     // const excludeFields = ['page', 'sort', 'limit', 'fields'];
+
+//     // //loopiing forEach element in queryObj to delte it from the site....
+//     // excludeFields.forEach((el) => delete qureyObj[el]);
+
+//     // console.log(req.query);
+
+//     //==> simple method for filtering data using tradition mongoDb command for  creating queries..
+//     // const tours = await Tour.find({
+//     //   duration: 5,
+//     //   difficulty: 'easy',
+//     // });
+
+//     //==> EXECUTE QUERY..
+
+//     // console.log(req.query);
+
+//     // //==> ADVANCED FILTERING...
+//     // //sorting the queryObj according to less than and greater than..
+//     // let queryStr = JSON.stringify(qureyObj);
+//     // queryStr = queryStr.replace(/\b(gte|gt|lte|lt)\b/g, (match) => `$${match}`);
+//     // console.log(JSON.parse(queryStr));
+
+//     // //For greating or equal to...
+//     // //{duration: 5, difficulty: { $gte: 5}}
+//     // //{ duration: { gte: '6' }, difficulty: '5' }
+
+//     // // const query = Tour.find(qureyObj);
+//     // let query = Tour.find(JSON.parse(queryStr));
+
+//     //2)Sorting...
+//     // if (req.query.sort) {
+//     //   const sortBy = req.query.sort.split(',').join('');
+//     //   console.log(sortBy);
+//     //   // query = query.sort(req.query.sort);
+//     //   query = query.sort(sortBy);
+//     // } else {
+//     //   //if not sort is added then we must sort it by the time it is created at...
+//     //   query = query.sort('-createdAt');
+//     // }
+
+//     //3)Field limiting...
+//     // if (req.query.fields) {
+//     //   const fields = req.query.fields.split(',').join(' ');
+//     //   query = query.select(fields);
+//     // } else {
+//     //   query = query.select('-__v');
+//     // }
+
+//     //4)Pagination...
+//     // const page = req.query.page * 1 || 1; // || is used to defining the default values...
+//     // const limit = req.query.limit * 1 || 100;
+//     // console.log(page);
+
+//     // //so here basically what we are doing is seeing that skip
+//     // //contain the page - 1 * limit value in which limit is by default set to 10..
+//     // const skip = (page - 1) * limit;
+//     // //page=2&limit=10
+//     // query = query.skip(skip).limit(limit);
+
+//     // if (req.query.page) {
+//     //   //used to counting the number of documents in the page...
+//     //   const numTours = await Tour.countDocuments();
+//     //   //if the skip is more than we must throw an error..
+//     //   if (skip >= numTours) throw new Error('This page does not exits');
+//     // }
+
+//     //Excecute query...
+//     const feautres = new APIFeatures(Tour.find(), req.query)
+//       .filter()
+//       .sort()
+//       .limitFields()
+//       .paginate();
+
+//     const tours = await feautres.query;
+
+//     //using mongoose method..
+//     // const tours = await Tour.find()
+//     //   .where('duration')
+//     //   .equals(5)
+//     //   .where('difficulty')
+//     //   .equals('easy');
+//     res.status(200).json({
+//       status: 'success',
+//       results: tours.length,
+//       data: {
+//         tours,
+//       },
+//     });
+//   } catch (err) {
+//     res.status(404).json({
+//       status: 'fail',
+//       message: err,
+//     });
+//   }
+// };
+
+// //finding single tour we can use findById
+
+// exports.getTour = async (req, res) => {
+//   try {
+//     const tour = await Tour.findById(req.params.id);
+//     //Tour.findOne({ _id: req.params.id})
+//     res.status(200).json({
+//       status: 'success',
+//       results: tour.length,
+//       data: {
+//         tour,
+//       },
+//     });
+//   } catch (err) {
+//     res.status(404).json({
+//       status: 'fail',
+//       message: err,
+//     });
+//   }
+// };
+
+// //.create method to create new tours..
+
+// exports.createTour = async (req, res) => {
+//   try {
+//     const newTour = await Tour.create(req.body);
+//     res.status(201).json({
+//       status: 'success',
+//       data: {
+//         tour: newTour,
+//       },
+//     });
+//   } catch (err) {
+//     res.status(400).json({
+//       status: 'fail',
+//       message: 'Inavlid data sent...',
+//     });
+//   }
+// };
+
+// //findByIdAndUpdate to get by id and update... we pass, req.paramas.id, req.body,{new: true,}...
+// //runValidators are used to validate the data..
+
+// exports.updateTour = async (req, res) => {
+//   try {
+//     const tour = await Tour.findByIdAndUpdate(req.params.id, req.body, {
+//       new: true,
+//       runValidators: true,
+//     });
+//     res.status(200).json({
+//       status: 'success',
+//       data: {
+//         tour,
+//       },
+//     });
+//   } catch (err) {
+//     res.status(400).json({
+//       status: 'fail',
+//       message: err,
+//     });
+//   }
+// };
+
+// exports.deleteTour = async (req, res) => {
+//   try {
+//     await Tour.findByIdAndDelete(req.params.id, req.body);
+//     res.status(204).json({
+//       status: 'success',
+//       data: null,
+//     });
+//   } catch (err) {
+//     res.status(400).json({
+//       status: 'fail',
+//       message: err,
+//     });
+//   }
+// };