sails-arangojs/helpers/teardown.js

A sails-arangojs adapter for Sails / Waterline

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//     ██║   █████╗  ███████║██████╔╝██║  ██║██║   ██║██║ █╗ ██║██╔██╗ ██║
//     ██║   ██╔══╝  ██╔══██║██╔══██╗██║  ██║██║   ██║██║███╗██║██║╚██╗██║
//     ██║   ███████╗██║  ██║██║  ██║██████╔╝╚██████╔╝╚███╔███╔╝██║ ╚████║
//     ╚═╝   ╚══════╝╚═╝  ╚═╝╚═╝  ╚═╝╚═════╝  ╚═════╝  ╚══╝╚══╝ ╚═╝  ╚═══╝
//

module.exports = require('machine').build({
  friendlyName: 'Teardown',

  description:
    'Destroys a connection manager so that a server can be shut down cleanly.',

  inputs: {
    identity: {
      description: 'The datastore identity to teardown.',
      required: true,
      example: '===',
    },

    datastores: {
      description:
        'An object containing all of the data stores that have been registered.',
      required: true,
      example: '===',
    },

    modelDefinitions: {
      description:
        'An object containing all of the model definitions that have been registered.',
      required: true,
      example: '===',
    },
  },

  exits: {
    success: {
      description: 'The data store was initialized successfully.',
    },

    badConfiguration: {
      description: 'The configuration was invalid.',
    },
  },

  fn: function teardown(inputs, exits) {
    // Dependencies
    const ArangoDb = require('../private/machinepack-arango');

    const datastore = inputs.datastores[inputs.identity];
    if (!datastore) {
      return exits.error(
        new Error(
          'Invalid data store identity. No data store exist with that identity.',
        ),
      );
    }

    //  ╔╦╗╔═╗╔═╗╔╦╗╦═╗╔═╗╦ ╦  ┌┬┐┌─┐┌┐┌┌─┐┌─┐┌─┐┬─┐
    //   ║║║╣ ╚═╗ ║ ╠╦╝║ ║╚╦╝  │││├─┤│││├─┤│ ┬├┤ ├┬┘
    //  ═╩╝╚═╝╚═╝ ╩ ╩╚═╚═╝ ╩   ┴ ┴┴ ┴┘└┘┴ ┴└─┘└─┘┴└─
    const { manager } = datastore;
    if (!manager) {
      return exits.error(
        new Error(
          'Missing manager for this data store. The data store may be in the process of being destroyed.',
        ),
      );
    }

    return ArangoDb.destroyManager({ manager }, (err) => {
      if (err) {
        return exits.error(err);
      }

      // Delete the rest of the data from the data store
      delete inputs.datastores[inputs.identity];

      // Delete the model definitions
      delete inputs.modelDefinitions[inputs.identity];

      return exits.success();
    });
  },
});