overleaf/services/web/app/src/Features/Project/ProjectHistoryHandler.js

/* eslint-disable
    camelcase,
    node/handle-callback-err,
    max-len,
    no-unused-vars,
*/
// TODO: This file was created by bulk-decaffeinate.
// Fix any style issues and re-enable lint.
/*
 * decaffeinate suggestions:
 * DS102: Remove unnecessary code created because of implicit returns
 * DS103: Rewrite code to no longer use __guard__
 * DS207: Consider shorter variations of null checks
 * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
 */
const { Project } = require('../../models/Project')
const ProjectDetailsHandler = require('./ProjectDetailsHandler')
const logger = require('logger-sharelatex')
const settings = require('@overleaf/settings')
const HistoryManager = require('../History/HistoryManager')
const ProjectEntityUpdateHandler = require('./ProjectEntityUpdateHandler')
const { promisifyAll } = require('../../util/promises')

const ProjectHistoryHandler = {
  setHistoryId(project_id, history_id, callback) {
    // reject invalid history ids
    if (callback == null) {
      callback = function (err) {}
    }
    if (!history_id || typeof history_id !== 'number') {
      return callback(new Error('invalid history id'))
    }
    // use $exists:false to prevent overwriting any existing history id, atomically
    return Project.updateOne(
      { _id: project_id, 'overleaf.history.id': { $exists: false } },
      { 'overleaf.history.id': history_id },
      function (err, result) {
        if (err != null) {
          return callback(err)
        }
        if ((result != null ? result.n : undefined) === 0) {
          return callback(new Error('history exists'))
        }
        return callback()
      }
    )
  },

  getHistoryId(project_id, callback) {
    if (callback == null) {
      callback = function (err, result) {}
    }
    return ProjectDetailsHandler.getDetails(
      project_id,
      function (err, project) {
        if (err != null) {
          return callback(err)
        } // n.b. getDetails returns an error if the project doesn't exist
        return callback(
          null,
          __guard__(
            __guard__(
              project != null ? project.overleaf : undefined,
              x1 => x1.history
            ),
            x => x.id
          )
        )
      }
    )
  },

  upgradeHistory(project_id, callback) {
    // project must have an overleaf.history.id before allowing display of new history
    if (callback == null) {
      callback = function (err, result) {}
    }
    return Project.updateOne(
      { _id: project_id, 'overleaf.history.id': { $exists: true } },
      {
        'overleaf.history.display': true,
        'overleaf.history.upgradedAt': new Date(),
      },
      function (err, result) {
        if (err != null) {
          return callback(err)
        }
        // return an error if overleaf.history.id wasn't present
        if ((result != null ? result.n : undefined) === 0) {
          return callback(new Error('history not upgraded'))
        }
        return callback()
      }
    )
  },

  downgradeHistory(project_id, callback) {
    if (callback == null) {
      callback = function (err, result) {}
    }
    return Project.updateOne(
      { _id: project_id, 'overleaf.history.upgradedAt': { $exists: true } },
      {
        'overleaf.history.display': false,
        $unset: { 'overleaf.history.upgradedAt': 1 },
      },
      function (err, result) {
        if (err != null) {
          return callback(err)
        }
        if ((result != null ? result.n : undefined) === 0) {
          return callback(new Error('history not downgraded'))
        }
        return callback()
      }
    )
  },

  ensureHistoryExistsForProject(project_id, callback) {
    // We can only set a history id for a project that doesn't have one. The
    // history id is cached in the project history service, and changing an
    // existing value corrupts the history, leaving it in an irrecoverable
    // state. Setting a history id when one wasn't present before is ok,
    // because undefined history ids aren't cached.
    if (callback == null) {
      callback = function (err) {}
    }
    return ProjectHistoryHandler.getHistoryId(
      project_id,
      function (err, history_id) {
        if (err != null) {
          return callback(err)
        }
        if (history_id != null) {
          return callback()
        } // history already exists, success
        return HistoryManager.initializeProject(function (err, history) {
          if (err != null) {
            return callback(err)
          }
          if (!(history != null ? history.overleaf_id : undefined)) {
            return callback(new Error('failed to initialize history id'))
          }
          return ProjectHistoryHandler.setHistoryId(
            project_id,
            history.overleaf_id,
            function (err) {
              if (err != null) {
                return callback(err)
              }
              return ProjectEntityUpdateHandler.resyncProjectHistory(
                project_id,
                function (err) {
                  if (err != null) {
                    return callback(err)
                  }
                  return HistoryManager.flushProject(project_id, callback)
                }
              )
            }
          )
        })
      }
    )
  },
}

function __guard__(value, transform) {
  return typeof value !== 'undefined' && value !== null
    ? transform(value)
    : undefined
}

ProjectHistoryHandler.promises = promisifyAll(ProjectHistoryHandler)
module.exports = ProjectHistoryHandler