CleverStack/cleverstack-cli

var Promise = require('bluebird')
  , async   = require('async')
  , semver  = require('semver')
  , _       = require('lodash')
  , https   = require('follow-redirects').https
  , utils   = GLOBAL.lib.utils
  , _pkg    = GLOBAL.lib.install;

var _keywordRequired = [ 'cleverstack module', 'cleverstack-module', 'cleverstack seed', 'cleverstack-seed' ];

Promise.longStackTraces();

/**
 * Searchies <queries> within the NPM registry
 *
 * @param  {String[]} queries
 * @return {Promise}
 * @api public
 */

var searchNPMRegistry = exports.npmRegistry = function(queries) {
  return new Promise(function(resolve, reject) {
    var repos = [];

    async.each(
      queries,
      function(q, next) {
        var search = q.split('@');
        if (typeof search[1] === 'undefined') {
          search[1] = '*';
        }

        _pkg.getJSON({
            hostname: 'registry.npmjs.org',
            path: '/' + encodeURIComponent(search[0])
          })
          .then(function(body) {
            if (typeof body === 'undefined' || (body.error && body.error === 'not_found')) {
              return next();
            }

            var versions   = Object.keys(body.versions)
              , maxVersion = semver.maxSatisfying(versions, search[1])
              , pkg        = body.versions[maxVersion];

            if (typeof pkg === 'undefined') {
              utils.fail('Invalid version ' + search[1] + ' for module ' + search[0], true);
              return next();
            }

            if (_.intersection(pkg.keywords, _keywordRequired).length > 0) {
              if (typeof pkg.repository === 'object' && pkg.repository.hasOwnProperty('url')) {
                pkg.homepage = pkg.repository.url;
              }

              repos.push(pkg);
            }

            next();
          });
      },
      function(err) {
        if (!!err) {
          return reject(err);
        }

        resolve(repos);
      });
  });
};

/**
 * Lists all of the CleverStack-friendly
 * modules within the NPM registry
 *
 * @return {Promise}
 * @api public
 */

var list = exports.list = function() {
  return new Promise(function(resolve, reject) {
    _pkg
      .getJSON({
        hostname: 'registry.npmjs.org',
        path: '/-/_view/byKeyword?startkey=["cleverstack"]&endkey=["cleverstack",{}]&group_level=2'
      })
      .then(function(body) {
        if (typeof body !== 'object' || !body.hasOwnProperty('rows')) {
          return resolve([]);
        }

        var rows = body.rows.map(function(r) {
          return r.key[ 1 ];
        });

        searchNPMRegistry(rows)
          .then(function(response) {
            resolve(response);
          })
          .catch(function (err) {
            reject(err);
          });
      });
  });
};

/**
 * Searches through the NPM registry with a
 * info message, if queries is empty then simply return resolves
 *
 * @param  {String[]} queries
 * @return {Promise}
 * @api public
 */

var searchNPM = exports.npm = function(queries) {
  return new Promise(function(resolve, reject) {
    utils.info('    Searching NPM...');
    lib.utils.running('Searching NPM...');

    if (queries.length < 1) {
      list()
        .then(function(res) {
          resolve(res);
        })
        .catch(function(err) {
          reject(err);
        });
    } else {
      searchNPMRegistry(queries)
        .then(function(res) {
          resolve(res);
        })
        .catch(function(err) {
          reject(err);
        });
    }
  });
};

/**
 * Lists all CleverStack-friendly modules within the Bower registry
 *
 * @return {Promise}
 * @api private
 */

function listBower() {
  return new Promise(function(resolve) {
    var repos = [];

    utils.info('    Searching Bower...');
    lib.utils.running('Searching Bower...');

    _pkg.getJSON({
        hostname: 'bower-component-list.herokuapp.com',
        path: '/keyword/cleverstack'
      })
      .then(function(body) {
        if (!Array.isArray(body)) {
          return resolve(repos);
        }

        async.each(
          body,
          function(module, next) {
            _pkg.getJSON({
              hostname: 'bower.herokuapp.com',
              path: '/packages/' + encodeURIComponent(module.name)
            })
            .then(function(bower) {
              if (!bower || !bower.url) {
                return next();
              }

              module.url = bower.url;
              repos.push(module);
              next();
            });
          }, function() {
            resolve(repos);
          });
      });
  });
}

/**
 * Returns specific information from a Bower package
 * It will try to find if the version exists through
 * the packages GitHub page (this is what Bower does anyway)
 *
 * @param  {String} query
 * @return {Promise}
 * @api public
 */

var searchBower = exports.bower = function(query) {
  return new Promise(function(resolve) {
    var pkg = query.split('@');

    _pkg.getJSON({
        hostname: 'bower.herokuapp.com',
        path: '/packages/' + encodeURIComponent(pkg[ 0 ])
      })
      .then(function (bower) {
        if (typeof bower === 'undefined') {
          return resolve();
        } else if (typeof pkg[ 1 ] === 'undefined') {
          return resolve(bower);
        }

        utils.info('  Getting bower package information for ' + pkg[ 0 ] + '...');

        var req = https.request({
            hostname: 'github.com',
            path: '/' + bower.url.split('/').splice(-2).join('/').replace('.git', '') + '/tree/' + pkg[ 1 ],
            headers: {
              'User-Agent': 'cleverstack'
            }
          },
          function (res) {
            if (res.statusCode !== 200) {
              utils.fail('Couldn\'t find version ' + pkg[ 1 ] + ' for ' + pkg[ 0 ], true);
              return resolve();
            }

            bower.version = pkg[ 1 ];
            bower.bower = true;
            resolve(bower);
          }
       );

        req.end();
      });
  });
};

/**
 * Aggregates searches from NPM and Bower
 *
 * @param  {String[]} args
 * @return {Promise}
 * @api public
 */

exports.aggregate = function(args) {
  return new Promise(function(resolve, reject) {
    var all = [];

    utils.info('  Searching for modules...');
    lib.utils.running('Searching for modules...');

    all.push(searchNPM(args));
    all.push(listBower());

    args.forEach(function(arg) {
      all.push(searchBower(arg));
    });

    Promise
      .all(all)
      .then(function(results) {
        var npm   = results[ 0 ].map(function (r) { r.type = 'backend'; return r; })
          , keys  = results[ 1 ]
          , repos = [];

        results.shift();
        results.shift();

        var bower = (args.length < 1 ? keys : results);
        if (!Array.isArray(bower)) {
          bower = [];
        }

        bower.filter(function(res) {
          return typeof res === 'object' && res.hasOwnProperty('url');
        }).forEach(function(rep)  {
          var cleverStackBower = _.find(keys, function(key) {
            return key.name === rep.name;
          });

          if (cleverStackBower) {
            rep = _.merge(cleverStackBower, rep);
            rep.type = 'frontend';
            repos.push(rep);
          }
        });

        resolve([ npm, repos ]);
      })
      .catch(function(err) {
        reject(err);
      });
  });
};