discogs/lib/discogs.js

Simple client for Discogs API

// Generated by CoffeeScript 1.7.1
(function() {
  var discogs, exports, querystring, request, zlib,
    __indexOf = [].indexOf || function(item) { for (var i = 0, l = this.length; i < l; i++) { if (i in this && this[i] === item) return i; } return -1; };

  querystring = require('querystring');

  request = require('request');

  zlib = require('zlib');

  discogs = require('../package.json');

  exports = module.exports = function(format) {
    var discogsRequest, getUrl, responseHandler;
    if (format === 'json') {
      format = null;
    }
    getUrl = function(url) {
      var sep;
      if (url.substr(0, 7) !== 'http://') {
        url = "http://api.discogs.com/" + url;
      }
      sep = __indexOf.call(url, "?") >= 0 ? "&" : "?";
      if (format) {
        url += "" + sep + "f=" + format;
      }
      return url;
    };
    discogsRequest = function(url, next) {
      var parseResponse;
      parseResponse = function(err, res, body) {
        var e, _ref;
        if (err) {
          return next(err);
        } else if (~((_ref = res.headers['content-type']) != null ? _ref.indexOf('json') : void 0) || !format) {
          try {
            return next(null, JSON.parse(body));
          } catch (_error) {
            e = _error;
            return next(e);
          }
        } else {
          return next(null, body);
        }
      };
      return request({
        uri: getUrl(url),
        headers: {
          'accept-encoding': 'gzip',
          'user-agent': "" + discogs.name + "/" + discogs.version + " +" + discogs.homepage
        },
        encoding: null
      }, function(error, res, body) {
        var _ref, _ref1;
        if (!error && (200 <= (_ref = res.statusCode) && _ref < 400)) {
          if (~((_ref1 = res.headers['content-encoding']) != null ? _ref1.indexOf('gzip') : void 0)) {
            return zlib.gunzip(body, function(err, body) {
              return parseResponse(err, res, body);
            });
          } else {
            return parseResponse(error, res, body.toString('utf8'));
          }
        } else {
          return next(error);
        }
      });
    };
    responseHandler = function(type, next) {
      return function(err, res) {
        var _ref;
        if (err) {
          return next(err);
        } else {
          return next(null, res != null ? (_ref = res.resp) != null ? _ref[type] : void 0 : void 0);
        }
      };
    };
    return {
      get: function(url, next) {
        return discogsRequest(url, next);
      },
      master: function(id, next) {
        return discogsRequest('master/' + id, responseHandler('master', next));
      },
      release: function(id, next) {
        return discogsRequest('release/' + id, responseHandler('release', next));
      },
      artist: function(name, next) {
        return discogsRequest('artist/' + name, responseHandler('artist', next));
      },
      label: function(name, next) {
        return discogsRequest('label/' + name, responseHandler('label', next));
      },
      search: function(query, type, next) {
        if (type instanceof Function) {
          next = type;
          type = 'all';
        }
        return discogsRequest('search?' + querystring.stringify({
          type: type,
          q: query
        }), responseHandler('search', next));
      },
      lookup: function(query, next) {
        return this.search(query, "releases", (function(_this) {
          return function(err, res) {
            var id, masters, matches, release, result, results, _ref;
            if (err) {
              return next(err);
            }
            results = res != null ? (_ref = res.searchresults) != null ? _ref.results : void 0 : void 0;
            if (!results) {
              return next();
            }
            masters = (function() {
              var _i, _len, _results;
              _results = [];
              for (_i = 0, _len = results.length; _i < _len; _i++) {
                result = results[_i];
                if (result.type === "master") {
                  _results.push(result);
                }
              }
              return _results;
            })();
            if (masters.length) {
              results = masters;
            }
            matches = (function() {
              var _i, _len, _results;
              _results = [];
              for (_i = 0, _len = results.length; _i < _len; _i++) {
                result = results[_i];
                if (result.title.toLowerCase() === query.toLowerCase()) {
                  _results.push(result);
                }
              }
              return _results;
            })();
            if (matches.length) {
              results = matches;
            }
            release = results[0];
            id = release.uri.split("/").pop();
            return _this[release.type](id, function(err, res) {
              if ("master_id" in res) {
                return _this.master(res.master_id, function(err, master) {
                  if ("main_release" in master) {
                    return _this.release(master.main_release, next);
                  } else {
                    return next(null, master);
                  }
                });
              } else if ("main_release" in res) {
                return _this.release(res.main_release, next);
              } else {
                return next(null, res);
              }
            });
          };
        })(this));
      }
    };
  };

}).call(this);