all files / lib/ adapter.js

100% Statements 505/505
98.01% Branches 296/302
100% Functions 88/88
100% Lines 504/504
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'use strict';
 
Object.defineProperty(exports, "__esModule", {
  value: true
});
 
var _jsExtend = require('js-extend');
 
var _promise = require('./deps/promise');
 
var _promise2 = _interopRequireDefault(_promise);
 
var _pick = require('./deps/pick');
 
var _pick2 = _interopRequireDefault(_pick);
 
var _pouchdbCollections = require('pouchdb-collections');
 
var _pouchdbCollections2 = _interopRequireDefault(_pouchdbCollections);
 
var _inherits = require('inherits');
 
var _inherits2 = _interopRequireDefault(_inherits);
 
var _argsarray = require('argsarray');
 
var _argsarray2 = _interopRequireDefault(_argsarray);
 
var _adapterFun = require('./deps/adapterFun');
 
var _adapterFun2 = _interopRequireDefault(_adapterFun);
 
var _events = require('events');
 
var _upsert = require('./deps/upsert');
 
var _upsert2 = _interopRequireDefault(_upsert);
 
var _changes = require('./changes');
 
var _changes2 = _interopRequireDefault(_changes);
 
var _bulkGetShim = require('./deps/bulkGetShim');
 
var _bulkGetShim2 = _interopRequireDefault(_bulkGetShim);
 
var _isDeleted = require('./deps/docs/isDeleted');
 
var _isDeleted2 = _interopRequireDefault(_isDeleted);
 
var _isLocalId = require('./deps/docs/isLocalId');
 
var _isLocalId2 = _interopRequireDefault(_isLocalId);
 
var _traverseRevTree = require('./deps/merge/traverseRevTree');
 
var _traverseRevTree2 = _interopRequireDefault(_traverseRevTree);
 
var _collectLeaves = require('./deps/merge/collectLeaves');
 
var _collectLeaves2 = _interopRequireDefault(_collectLeaves);
 
var _rootToLeaf = require('./deps/merge/rootToLeaf');
 
var _rootToLeaf2 = _interopRequireDefault(_rootToLeaf);
 
var _collectConflicts = require('./deps/merge/collectConflicts');
 
var _collectConflicts2 = _interopRequireDefault(_collectConflicts);
 
var _parseDoc = require('./deps/docs/parseDoc');
 
var _errors = require('./deps/errors');
 
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
 
/*
 * A generic pouch adapter
 */
 
function compare(left, right) {
  return left < right ? -1 : left > right ? 1 : 0;
}
 
// returns first element of arr satisfying callback predicate
function arrayFirst(arr, callback) {
  for (var i = 0; i < arr.length; i++) {
    if (callback(arr[i], i) === true) {
      return arr[i];
    }
  }
}
 
// Wrapper for functions that call the bulkdocs api with a single doc,
// if the first result is an error, return an error
function yankError(callback) {
  return function (err, results) {
    if (err || results[0] && results[0].error) {
      callback(err || results[0]);
    } else {
      callback(null, results.length ? results[0] : results);
    }
  };
}
 
// clean docs given to us by the user
function cleanDocs(docs) {
  for (var i = 0; i < docs.length; i++) {
    var doc = docs[i];
    if (doc._deleted) {
      delete doc._attachments; // ignore atts for deleted docs
    } else if (doc._attachments) {
        // filter out extraneous keys from _attachments
        var atts = Object.keys(doc._attachments);
        for (var j = 0; j < atts.length; j++) {
          var att = atts[j];
          doc._attachments[att] = (0, _pick2.default)(doc._attachments[att], ['data', 'digest', 'content_type', 'length', 'revpos', 'stub']);
        }
      }
  }
}
 
// compare two docs, first by _id then by _rev
function compareByIdThenRev(a, b) {
  var idCompare = compare(a._id, b._id);
  if (idCompare !== 0) {
    return idCompare;
  }
  var aStart = a._revisions ? a._revisions.start : 0;
  var bStart = b._revisions ? b._revisions.start : 0;
  return compare(aStart, bStart);
}
 
// for every node in a revision tree computes its distance from the closest
// leaf
function computeHeight(revs) {
  var height = {};
  var edges = [];
  (0, _traverseRevTree2.default)(revs, function (isLeaf, pos, id, prnt) {
    var rev = pos + "-" + id;
    if (isLeaf) {
      height[rev] = 0;
    }
    if (prnt !== undefined) {
      edges.push({ from: prnt, to: rev });
    }
    return rev;
  });
 
  edges.reverse();
  edges.forEach(function (edge) {
    if (height[edge.from] === undefined) {
      height[edge.from] = 1 + height[edge.to];
    } else {
      height[edge.from] = Math.min(height[edge.from], 1 + height[edge.to]);
    }
  });
  return height;
}
 
function allDocsKeysQuery(api, opts, callback) {
  var keys = 'limit' in opts ? opts.keys.slice(opts.skip, opts.limit + opts.skip) : opts.skip > 0 ? opts.keys.slice(opts.skip) : opts.keys;
  if (opts.descending) {
    keys.reverse();
  }
  if (!keys.length) {
    return api._allDocs({ limit: 0 }, callback);
  }
  var finalResults = {
    offset: opts.skip
  };
  return _promise2.default.all(keys.map(function (key) {
    var subOpts = (0, _jsExtend.extend)({ key: key, deleted: 'ok' }, opts);
    ['limit', 'skip', 'keys'].forEach(function (optKey) {
      delete subOpts[optKey];
    });
    return new _promise2.default(function (resolve, reject) {
      api._allDocs(subOpts, function (err, res) {
        /* istanbul ignore if */
        Iif (err) {
          return reject(err);
        }
        finalResults.total_rows = res.total_rows;
        resolve(res.rows[0] || { key: key, error: 'not_found' });
      });
    });
  })).then(function (results) {
    finalResults.rows = results;
    return finalResults;
  });
}
 
// all compaction is done in a queue, to avoid attaching
// too many listeners at once
function doNextCompaction(self) {
  var task = self._compactionQueue[0];
  var opts = task.opts;
  var callback = task.callback;
  self.get('_local/compaction').catch(function () {
    return false;
  }).then(function (doc) {
    if (doc && doc.last_seq) {
      opts.last_seq = doc.last_seq;
    }
    self._compact(opts, function (err, res) {
      /* istanbul ignore if */
      Iif (err) {
        callback(err);
      } else {
        callback(null, res);
      }
      process.nextTick(function () {
        self._compactionQueue.shift();
        if (self._compactionQueue.length) {
          doNextCompaction(self);
        }
      });
    });
  });
}
 
function attachmentNameError(name) {
  if (name.charAt(0) === '_') {
    return name + 'is not a valid attachment name, attachment ' + 'names cannot start with \'_\'';
  }
  return false;
}
 
(0, _inherits2.default)(AbstractPouchDB, _events.EventEmitter);
 
function AbstractPouchDB() {
  _events.EventEmitter.call(this);
}
 
AbstractPouchDB.prototype.post = (0, _adapterFun2.default)('post', function (doc, opts, callback) {
  if (typeof opts === 'function') {
    callback = opts;
    opts = {};
  }
  if (typeof doc !== 'object' || Array.isArray(doc)) {
    return callback((0, _errors.createError)(_errors.NOT_AN_OBJECT));
  }
  this.bulkDocs({ docs: [doc] }, opts, yankError(callback));
});
 
AbstractPouchDB.prototype.put = (0, _adapterFun2.default)('put', (0, _argsarray2.default)(function (args) {
  var temp, temptype, opts, callback;
  var doc = args.shift();
  var id = '_id' in doc;
  if (typeof doc !== 'object' || Array.isArray(doc)) {
    callback = args.pop();
    return callback((0, _errors.createError)(_errors.NOT_AN_OBJECT));
  }
  while (true) {
    temp = args.shift();
    temptype = typeof temp;
    if (temptype === "string" && !id) {
      doc._id = temp;
      id = true;
    } else if (temptype === "string" && id && !('_rev' in doc)) {
      doc._rev = temp;
    } else if (temptype === "object") {
      opts = temp;
    } else if (temptype === "function") {
      callback = temp;
    }
    if (!args.length) {
      break;
    }
  }
  opts = opts || {};
  (0, _parseDoc.invalidIdError)(doc._id);
  if ((0, _isLocalId2.default)(doc._id) && typeof this._putLocal === 'function') {
    if (doc._deleted) {
      return this._removeLocal(doc, callback);
    } else {
      return this._putLocal(doc, callback);
    }
  }
  this.bulkDocs({ docs: [doc] }, opts, yankError(callback));
}));
 
AbstractPouchDB.prototype.putAttachment = (0, _adapterFun2.default)('putAttachment', function (docId, attachmentId, rev, blob, type, callback) {
  var api = this;
  if (typeof type === 'function') {
    callback = type;
    type = blob;
    blob = rev;
    rev = null;
  }
  // Lets fix in https://github.com/pouchdb/pouchdb/issues/3267
  /* istanbul ignore if */
  Iif (typeof type === 'undefined') {
    type = blob;
    blob = rev;
    rev = null;
  }
 
  function createAttachment(doc) {
    doc._attachments = doc._attachments || {};
    doc._attachments[attachmentId] = {
      content_type: type,
      data: blob
    };
    return api.put(doc);
  }
 
  return api.get(docId).then(function (doc) {
    if (doc._rev !== rev) {
      throw (0, _errors.createError)(_errors.REV_CONFLICT);
    }
 
    return createAttachment(doc);
  }, function (err) {
    // create new doc
    /* istanbul ignore else */
    Eif (err.reason === _errors.MISSING_DOC.message) {
      return createAttachment({ _id: docId });
    } else {
      throw err;
    }
  });
});
 
AbstractPouchDB.prototype.removeAttachment = (0, _adapterFun2.default)('removeAttachment', function (docId, attachmentId, rev, callback) {
  var self = this;
  self.get(docId, function (err, obj) {
    /* istanbul ignore if */
    Iif (err) {
      callback(err);
      return;
    }
    if (obj._rev !== rev) {
      callback((0, _errors.createError)(_errors.REV_CONFLICT));
      return;
    }
    /* istanbul ignore if */
    Iif (!obj._attachments) {
      return callback();
    }
    delete obj._attachments[attachmentId];
    if (Object.keys(obj._attachments).length === 0) {
      delete obj._attachments;
    }
    self.put(obj, callback);
  });
});
 
AbstractPouchDB.prototype.remove = (0, _adapterFun2.default)('remove', function (docOrId, optsOrRev, opts, callback) {
  var doc;
  if (typeof optsOrRev === 'string') {
    // id, rev, opts, callback style
    doc = {
      _id: docOrId,
      _rev: optsOrRev
    };
    if (typeof opts === 'function') {
      callback = opts;
      opts = {};
    }
  } else {
    // doc, opts, callback style
    doc = docOrId;
    if (typeof optsOrRev === 'function') {
      callback = optsOrRev;
      opts = {};
    } else {
      callback = opts;
      opts = optsOrRev;
    }
  }
  opts = opts || {};
  opts.was_delete = true;
  var newDoc = { _id: doc._id, _rev: doc._rev || opts.rev };
  newDoc._deleted = true;
  if ((0, _isLocalId2.default)(newDoc._id) && typeof this._removeLocal === 'function') {
    return this._removeLocal(doc, callback);
  }
  this.bulkDocs({ docs: [newDoc] }, opts, yankError(callback));
});
 
AbstractPouchDB.prototype.revsDiff = (0, _adapterFun2.default)('revsDiff', function (req, opts, callback) {
  if (typeof opts === 'function') {
    callback = opts;
    opts = {};
  }
  var ids = Object.keys(req);
 
  if (!ids.length) {
    return callback(null, {});
  }
 
  var count = 0;
  var missing = new _pouchdbCollections2.default.Map();
 
  function addToMissing(id, revId) {
    if (!missing.has(id)) {
      missing.set(id, { missing: [] });
    }
    missing.get(id).missing.push(revId);
  }
 
  function processDoc(id, rev_tree) {
    // Is this fast enough? Maybe we should switch to a set simulated by a map
    var missingForId = req[id].slice(0);
    (0, _traverseRevTree2.default)(rev_tree, function (isLeaf, pos, revHash, ctx, opts) {
      var rev = pos + '-' + revHash;
      var idx = missingForId.indexOf(rev);
      if (idx === -1) {
        return;
      }
 
      missingForId.splice(idx, 1);
      /* istanbul ignore if */
      Iif (opts.status !== 'available') {
        addToMissing(id, rev);
      }
    });
 
    // Traversing the tree is synchronous, so now `missingForId` contains
    // revisions that were not found in the tree
    missingForId.forEach(function (rev) {
      addToMissing(id, rev);
    });
  }
 
  ids.map(function (id) {
    this._getRevisionTree(id, function (err, rev_tree) {
      if (err && err.status === 404 && err.message === 'missing') {
        missing.set(id, { missing: req[id] });
      } else Iif (err) {
        /* istanbul ignore next */
        return callback(err);
      } else {
        processDoc(id, rev_tree);
      }
 
      if (++count === ids.length) {
        // convert LazyMap to object
        var missingObj = {};
        missing.forEach(function (value, key) {
          missingObj[key] = value;
        });
        return callback(null, missingObj);
      }
    });
  }, this);
});
 
// _bulk_get API for faster replication, as described in
// https://github.com/apache/couchdb-chttpd/pull/33
// At the "abstract" level, it will just run multiple get()s in
// parallel, because this isn't much of a performance cost
// for local databases (except the cost of multiple transactions, which is
// small). The http adapter overrides this in order
// to do a more efficient single HTTP request.
AbstractPouchDB.prototype.bulkGet = (0, _adapterFun2.default)('bulkGet', function (opts, callback) {
  (0, _bulkGetShim2.default)(this, opts, callback);
});
 
// compact one document and fire callback
// by compacting we mean removing all revisions which
// are further from the leaf in revision tree than max_height
AbstractPouchDB.prototype.compactDocument = (0, _adapterFun2.default)('compactDocument', function (docId, maxHeight, callback) {
  var self = this;
  this._getRevisionTree(docId, function (err, revTree) {
    /* istanbul ignore if */
    Iif (err) {
      return callback(err);
    }
    var height = computeHeight(revTree);
    var candidates = [];
    var revs = [];
    Object.keys(height).forEach(function (rev) {
      if (height[rev] > maxHeight) {
        candidates.push(rev);
      }
    });
 
    (0, _traverseRevTree2.default)(revTree, function (isLeaf, pos, revHash, ctx, opts) {
      var rev = pos + '-' + revHash;
      if (opts.status === 'available' && candidates.indexOf(rev) !== -1) {
        revs.push(rev);
      }
    });
    self._doCompaction(docId, revs, callback);
  });
});
 
// compact the whole database using single document
// compaction
AbstractPouchDB.prototype.compact = (0, _adapterFun2.default)('compact', function (opts, callback) {
  if (typeof opts === 'function') {
    callback = opts;
    opts = {};
  }
 
  var self = this;
  opts = opts || {};
 
  self._compactionQueue = self._compactionQueue || [];
  self._compactionQueue.push({ opts: opts, callback: callback });
  if (self._compactionQueue.length === 1) {
    doNextCompaction(self);
  }
});
AbstractPouchDB.prototype._compact = function (opts, callback) {
  var self = this;
  var changesOpts = {
    return_docs: false,
    last_seq: opts.last_seq || 0
  };
  var promises = [];
 
  function onChange(row) {
    promises.push(self.compactDocument(row.id, 0));
  }
  function onComplete(resp) {
    var lastSeq = resp.last_seq;
    _promise2.default.all(promises).then(function () {
      return (0, _upsert2.default)(self, '_local/compaction', function deltaFunc(doc) {
        if (!doc.last_seq || doc.last_seq < lastSeq) {
          doc.last_seq = lastSeq;
          return doc;
        }
        return false; // somebody else got here first, don't update
      });
    }).then(function () {
      callback(null, { ok: true });
    }).catch(callback);
  }
  self.changes(changesOpts).on('change', onChange).on('complete', onComplete).on('error', callback);
};
/* Begin api wrappers. Specific functionality to storage belongs in the
   _[method] */
AbstractPouchDB.prototype.get = (0, _adapterFun2.default)('get', function (id, opts, callback) {
  if (typeof opts === 'function') {
    callback = opts;
    opts = {};
  }
  if (typeof id !== 'string') {
    return callback((0, _errors.createError)(_errors.INVALID_ID));
  }
  if ((0, _isLocalId2.default)(id) && typeof this._getLocal === 'function') {
    return this._getLocal(id, callback);
  }
  var leaves = [],
      self = this;
 
  function finishOpenRevs() {
    var result = [];
    var count = leaves.length;
    /* istanbul ignore if */
    Iif (!count) {
      return callback(null, result);
    }
    // order with open_revs is unspecified
    leaves.forEach(function (leaf) {
      self.get(id, {
        rev: leaf,
        revs: opts.revs,
        attachments: opts.attachments
      }, function (err, doc) {
        if (!err) {
          result.push({ ok: doc });
        } else {
          result.push({ missing: leaf });
        }
        count--;
        if (!count) {
          callback(null, result);
        }
      });
    });
  }
 
  if (opts.open_revs) {
    if (opts.open_revs === "all") {
      this._getRevisionTree(id, function (err, rev_tree) {
        if (err) {
          return callback(err);
        }
        leaves = (0, _collectLeaves2.default)(rev_tree).map(function (leaf) {
          return leaf.rev;
        });
        finishOpenRevs();
      });
    } else {
      if (Array.isArray(opts.open_revs)) {
        leaves = opts.open_revs;
        for (var i = 0; i < leaves.length; i++) {
          var l = leaves[i];
          // looks like it's the only thing couchdb checks
          if (!(typeof l === "string" && /^\d+-/.test(l))) {
            return callback((0, _errors.createError)(_errors.INVALID_REV));
          }
        }
        finishOpenRevs();
      } else {
        return callback((0, _errors.createError)(_errors.UNKNOWN_ERROR, 'function_clause'));
      }
    }
    return; // open_revs does not like other options
  }
 
  return this._get(id, opts, function (err, result) {
    if (err) {
      return callback(err);
    }
 
    var doc = result.doc;
    var metadata = result.metadata;
    var ctx = result.ctx;
 
    if (opts.conflicts) {
      var conflicts = (0, _collectConflicts2.default)(metadata);
      if (conflicts.length) {
        doc._conflicts = conflicts;
      }
    }
 
    if ((0, _isDeleted2.default)(metadata, doc._rev)) {
      doc._deleted = true;
    }
 
    if (opts.revs || opts.revs_info) {
      var paths = (0, _rootToLeaf2.default)(metadata.rev_tree);
      var path = arrayFirst(paths, function (arr) {
        return arr.ids.map(function (x) {
          return x.id;
        }).indexOf(doc._rev.split('-')[1]) !== -1;
      });
 
      var indexOfRev = path.ids.map(function (x) {
        return x.id;
      }).indexOf(doc._rev.split('-')[1]) + 1;
      var howMany = path.ids.length - indexOfRev;
      path.ids.splice(indexOfRev, howMany);
      path.ids.reverse();
 
      if (opts.revs) {
        doc._revisions = {
          start: path.pos + path.ids.length - 1,
          ids: path.ids.map(function (rev) {
            return rev.id;
          })
        };
      }
      if (opts.revs_info) {
        var pos = path.pos + path.ids.length;
        doc._revs_info = path.ids.map(function (rev) {
          pos--;
          return {
            rev: pos + '-' + rev.id,
            status: rev.opts.status
          };
        });
      }
    }
 
    if (opts.attachments && doc._attachments) {
      var attachments = doc._attachments;
      var count = Object.keys(attachments).length;
      if (count === 0) {
        return callback(null, doc);
      }
      Object.keys(attachments).forEach(function (key) {
        this._getAttachment(attachments[key], {
          binary: opts.binary,
          ctx: ctx
        }, function (err, data) {
          var att = doc._attachments[key];
          att.data = data;
          delete att.stub;
          delete att.length;
          if (! --count) {
            callback(null, doc);
          }
        });
      }, self);
    } else {
      if (doc._attachments) {
        for (var key in doc._attachments) {
          /* istanbul ignore else */
          Eif (doc._attachments.hasOwnProperty(key)) {
            doc._attachments[key].stub = true;
          }
        }
      }
      callback(null, doc);
    }
  });
});
 
AbstractPouchDB.prototype.getAttachment = (0, _adapterFun2.default)('getAttachment', function (docId, attachmentId, opts, callback) {
  var self = this;
  if (opts instanceof Function) {
    callback = opts;
    opts = {};
  }
  this._get(docId, opts, function (err, res) {
    if (err) {
      return callback(err);
    }
    if (res.doc._attachments && res.doc._attachments[attachmentId]) {
      opts.ctx = res.ctx;
      opts.binary = true;
      self._getAttachment(res.doc._attachments[attachmentId], opts, callback);
    } else {
      return callback((0, _errors.createError)(_errors.MISSING_DOC));
    }
  });
});
 
AbstractPouchDB.prototype.allDocs = (0, _adapterFun2.default)('allDocs', function (opts, callback) {
  if (typeof opts === 'function') {
    callback = opts;
    opts = {};
  }
  opts.skip = typeof opts.skip !== 'undefined' ? opts.skip : 0;
  if (opts.start_key) {
    opts.startkey = opts.start_key;
  }
  if (opts.end_key) {
    opts.endkey = opts.end_key;
  }
  if ('keys' in opts) {
    if (!Array.isArray(opts.keys)) {
      return callback(new TypeError('options.keys must be an array'));
    }
    var incompatibleOpt = ['startkey', 'endkey', 'key'].filter(function (incompatibleOpt) {
      return incompatibleOpt in opts;
    })[0];
    if (incompatibleOpt) {
      callback((0, _errors.createError)(_errors.QUERY_PARSE_ERROR, 'Query parameter `' + incompatibleOpt + '` is not compatible with multi-get'));
      return;
    }
    Eif (this.type() !== 'http') {
      return allDocsKeysQuery(this, opts, callback);
    }
  }
 
  return this._allDocs(opts, callback);
});
 
AbstractPouchDB.prototype.changes = function (opts, callback) {
  if (typeof opts === 'function') {
    callback = opts;
    opts = {};
  }
  return new _changes2.default(this, opts, callback);
};
 
AbstractPouchDB.prototype.close = (0, _adapterFun2.default)('close', function (callback) {
  this._closed = true;
  return this._close(callback);
});
 
AbstractPouchDB.prototype.info = (0, _adapterFun2.default)('info', function (callback) {
  var self = this;
  this._info(function (err, info) {
    if (err) {
      return callback(err);
    }
    // assume we know better than the adapter, unless it informs us
    info.db_name = info.db_name || self._db_name;
    info.auto_compaction = !!(self.auto_compaction && self.type() !== 'http');
    info.adapter = self.type();
    callback(null, info);
  });
});
 
AbstractPouchDB.prototype.id = (0, _adapterFun2.default)('id', function (callback) {
  return this._id(callback);
});
 
AbstractPouchDB.prototype.bulkDocs = (0, _adapterFun2.default)('bulkDocs', function (req, opts, callback) {
  if (typeof opts === 'function') {
    callback = opts;
    opts = {};
  }
 
  opts = opts || {};
 
  if (Array.isArray(req)) {
    req = {
      docs: req
    };
  }
 
  if (!req || !req.docs || !Array.isArray(req.docs)) {
    return callback((0, _errors.createError)(_errors.MISSING_BULK_DOCS));
  }
 
  for (var i = 0; i < req.docs.length; ++i) {
    if (typeof req.docs[i] !== 'object' || Array.isArray(req.docs[i])) {
      return callback((0, _errors.createError)(_errors.NOT_AN_OBJECT));
    }
  }
 
  var attachmentError;
  req.docs.forEach(function (doc) {
    if (doc._attachments) {
      Object.keys(doc._attachments).forEach(function (name) {
        attachmentError = attachmentError || attachmentNameError(name);
      });
    }
  });
 
  if (attachmentError) {
    return callback((0, _errors.createError)(_errors.BAD_REQUEST, attachmentError));
  }
 
  if (!('new_edits' in opts)) {
    if ('new_edits' in req) {
      opts.new_edits = req.new_edits;
    } else {
      opts.new_edits = true;
    }
  }
 
  if (!opts.new_edits && this.type() !== 'http') {
    // ensure revisions of the same doc are sorted, so that
    // the local adapter processes them correctly (#2935)
    req.docs.sort(compareByIdThenRev);
  }
 
  cleanDocs(req.docs);
 
  return this._bulkDocs(req, opts, function (err, res) {
    if (err) {
      return callback(err);
    }
    if (!opts.new_edits) {
      // this is what couch does when new_edits is false
      res = res.filter(function (x) {
        return x.error;
      });
    }
    callback(null, res);
  });
});
 
AbstractPouchDB.prototype.registerDependentDatabase = (0, _adapterFun2.default)('registerDependentDatabase', function (dependentDb, callback) {
  var depDB = new this.constructor(dependentDb, this.__opts);
 
  function diffFun(doc) {
    doc.dependentDbs = doc.dependentDbs || {};
    if (doc.dependentDbs[dependentDb]) {
      return false; // no update required
    }
    doc.dependentDbs[dependentDb] = true;
    return doc;
  }
  (0, _upsert2.default)(this, '_local/_pouch_dependentDbs', diffFun).then(function () {
    callback(null, { db: depDB });
  }).catch(callback);
});
 
AbstractPouchDB.prototype.destroy = (0, _adapterFun2.default)('destroy', function (opts, callback) {
 
  if (typeof opts === 'function') {
    callback = opts;
    opts = {};
  }
 
  var self = this;
  var usePrefix = 'use_prefix' in self ? self.use_prefix : true;
 
  function destroyDb() {
    // call destroy method of the particular adaptor
    self._destroy(opts, function (err, resp) {
      if (err) {
        return callback(err);
      }
      self.emit('destroyed');
      callback(null, resp || { 'ok': true });
    });
  }
 
  if (self.type() === 'http') {
    // no need to check for dependent DBs if it's a remote DB
    return destroyDb();
  }
 
  self.get('_local/_pouch_dependentDbs', function (err, localDoc) {
    if (err) {
      /* istanbul ignore if */
      Iif (err.status !== 404) {
        return callback(err);
      } else {
        // no dependencies
        return destroyDb();
      }
    }
    var dependentDbs = localDoc.dependentDbs;
    var PouchDB = self.constructor;
    var deletedMap = Object.keys(dependentDbs).map(function (name) {
      // use_prefix is only false in the browser
      /* istanbul ignore next */
      var trueName = usePrefix ? name.replace(new RegExp('^' + PouchDB.prefix), '') : name;
      return new PouchDB(trueName, self.__opts).destroy();
    });
    _promise2.default.all(deletedMap).then(destroyDb, callback);
  });
});
 
exports.default = AbstractPouchDB;
module.exports = exports['default'];