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home/multicol/public_html/mern-blog/api/controllers/_[ Writable ]

File://home/multicol/public_html/mern-blog/api/controllers/comment.controller.js

import Comment from "../models/comment.model.js";
import { errorHandler } from "../utils/error.js";

export const createComment = async (req, res, next) => {
  try {
    const { content, postId, userId } = req.body;
    if (userId !== req.user.id) {
      return next(
        errorHandler(403, "You are not allowed to create this comment.")
      );
    }
    const newComment = new Comment({ content, postId, userId });
    await newComment.save();

    res.status(200).json(newComment);
  } catch (error) {
    next(error);
  }
};

export const getPostComments = async (req, res, next) => {
  try {
    const comments = await Comment.find({ postId: req.params.postId }).sort({
      createdAt: -1,
    });
    res.status(200).json(comments);
  } catch (error) {
    next(error);
  }
};

export const likeComment = async (req, res, next) => {
  try {
    const comment = await Comment.findById(req.params.commentId);
    if (!comment) {
      return next(errorHandler(404, "Comment not found."));
    }
    const userIndex = comment.likes.indexOf(req.user.id);
    //console.log(userIndex)
    if (userIndex === -1) {
      comment.numberOfLikes += 1;
      comment.likes.push(req.user.id);
    } else {
      comment.numberOfLikes -= 1;
      comment.likes.splice(userIndex, 1);
    }
    await comment.save();
    res.status(200).json(comment);
  } catch (error) {
    next(error);
  }
};

export const editComment = async (req, res, next) => {
  try {
    const comment = await Comment.findById(req.params.commentId);

    if (!comment) {
      return next(errorHandler(404, "Comment not found"));
    }
    if (comment.userId !== req.user.id && !req.user.isAdmin) {
      return next(
        errorHandler(403, "You are not allowed to edit this comment")
      );
    }
    const editedComment = await Comment.findByIdAndUpdate(
      req.params.commentId,
      {
        content: req.body.content,
      },
      {
        new: true,
      }
    );
    res.status(200).json(editedComment);
  } catch (error) {
    next(error);
  }
};

export const deleteComment = async (req, res, next) => {
  try {
    const comment = await Comment.findById(req.params.commentId);

    if (!comment) {
      return next(errorHandler(404, "Comment not found."));
    }
    if (comment.userId !== req.user.id && !req.user.isAdmin) {
      return next(
        errorHandler("403", "You are not allowed to delete this comment")
      );
    }
    await Comment.findByIdAndDelete(req.params.commentId);
    res.status(200).json({ message: "comment has been deleted" });
  } catch (error) {
    next(error);
  }
};

export const getComments = async (req, res, next) => {
  if (!req.user.isAdmin) {
    return next(errorHandler(403, "You are not allowed to get all comments"));
  }
  try {
    const startIndex = parseInt(req.query.startIndex) || 0
    const limit = parseInt(req.query.limit) || 9
    const sortDirection = req.query.sort === 'desc'? -1 : 1
  
    const comments = await Comment.find().sort({createdAt: sortDirection}).skip(startIndex).limit(limit)
    const totalComments = await Comment.countDocuments();

    const now = new Date();
    const oneMonthAgo = new Date(
      now.getFullYear(),
      now.getMonth() - 1,
      now.getDate()
    );
    const lastMonthComments = await Comment.countDocuments({ createdAt: { $gte: oneMonthAgo } });
    res.status(200).json({ comments, totalComments, lastMonthComments });
  } catch (error) {
    next(error);
  }
};

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