'use strict';

const util = require('hexo-util');
const pathFn = require('path');
const Pattern = util.Pattern;

module.exports = ctx => ({
  pattern: new Pattern('_data/*path'),

  process: function dataProcessor(file) {
    const Data = ctx.model('Data');
    const path = file.params.path;
    const extname = pathFn.extname(path);
    const id = path.substring(0, path.length - extname.length);
    const doc = Data.findById(id);

    if (file.type === 'skip' && doc) {
      return;
    }

    if (file.type === 'delete') {
      if (doc) {
        return doc.remove();
      }

      return;
    }

    return file.render().then(result => {
      if (result == null) return;

      return Data.save({
        _id: id,
        data: result
      });
    });
  }
});