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1× | 'use strict';
Object.defineProperty(exports, "__esModule", {
value: true
});
var _clone = require('./deps/clone');
var _clone2 = _interopRequireDefault(_clone);
var _promise = require('./deps/promise');
var _promise2 = _interopRequireDefault(_promise);
var _isDeleted = require('./deps/docs/isDeleted');
var _isDeleted2 = _interopRequireDefault(_isDeleted);
var _inherits = require('inherits');
var _inherits2 = _interopRequireDefault(_inherits);
var _argsarray = require('argsarray');
var _argsarray2 = _interopRequireDefault(_argsarray);
var _once = require('./deps/once');
var _once2 = _interopRequireDefault(_once);
var _events = require('events');
var _evalFilter = require('./evalFilter');
var _evalFilter2 = _interopRequireDefault(_evalFilter);
var _evalView = require('./evalView');
var _evalView2 = _interopRequireDefault(_evalView);
var _parseDdocFunctionName = require('./deps/docs/parseDdocFunctionName');
var _parseDdocFunctionName2 = _interopRequireDefault(_parseDdocFunctionName);
var _normalizeDdocFunctionName = require('./deps/docs/normalizeDdocFunctionName');
var _normalizeDdocFunctionName2 = _interopRequireDefault(_normalizeDdocFunctionName);
var _collectLeaves = require('./deps/merge/collectLeaves');
var _collectLeaves2 = _interopRequireDefault(_collectLeaves);
var _collectConflicts = require('./deps/merge/collectConflicts');
var _collectConflicts2 = _interopRequireDefault(_collectConflicts);
var _errors = require('./deps/errors');
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
(0, _inherits2.default)(Changes, _events.EventEmitter);
function Changes(db, opts, callback) {
_events.EventEmitter.call(this);
var self = this;
this.db = db;
opts = opts ? (0, _clone2.default)(opts) : {};
var complete = opts.complete = (0, _once2.default)(function (err, resp) {
if (err) {
self.emit('error', err);
} else {
self.emit('complete', resp);
}
self.removeAllListeners();
db.removeListener('destroyed', onDestroy);
});
if (callback) {
self.on('complete', function (resp) {
callback(null, resp);
});
self.on('error', callback);
}
function onDestroy() {
self.cancel();
}
db.once('destroyed', onDestroy);
opts.onChange = function (change) {
/* istanbul ignore if */
Iif (opts.isCancelled) {
return;
}
self.emit('change', change);
if (self.startSeq && self.startSeq <= change.seq) {
self.startSeq = false;
}
};
var promise = new _promise2.default(function (fulfill, reject) {
opts.complete = function (err, res) {
if (err) {
reject(err);
} else {
fulfill(res);
}
};
});
self.once('cancel', function () {
db.removeListener('destroyed', onDestroy);
opts.complete(null, { status: 'cancelled' });
});
this.then = promise.then.bind(promise);
this['catch'] = promise['catch'].bind(promise);
this.then(function (result) {
complete(null, result);
}, complete);
if (!db.taskqueue.isReady) {
db.taskqueue.addTask(function () {
if (self.isCancelled) {
self.emit('cancel');
} else {
self.doChanges(opts);
}
});
} else {
self.doChanges(opts);
}
}
Changes.prototype.cancel = function () {
this.isCancelled = true;
if (this.db.taskqueue.isReady) {
this.emit('cancel');
}
};
function processChange(doc, metadata, opts) {
var changeList = [{ rev: doc._rev }];
if (opts.style === 'all_docs') {
changeList = (0, _collectLeaves2.default)(metadata.rev_tree).map(function (x) {
return { rev: x.rev };
});
}
var change = {
id: metadata.id,
changes: changeList,
doc: doc
};
if ((0, _isDeleted2.default)(metadata, doc._rev)) {
change.deleted = true;
}
if (opts.conflicts) {
change.doc._conflicts = (0, _collectConflicts2.default)(metadata);
if (!change.doc._conflicts.length) {
delete change.doc._conflicts;
}
}
return change;
}
Changes.prototype.doChanges = function (opts) {
var self = this;
var callback = opts.complete;
opts = (0, _clone2.default)(opts);
if ('live' in opts && !('continuous' in opts)) {
opts.continuous = opts.live;
}
opts.processChange = processChange;
if (opts.since === 'latest') {
opts.since = 'now';
}
if (!opts.since) {
opts.since = 0;
}
if (opts.since === 'now') {
this.db.info().then(function (info) {
/* istanbul ignore if */
Iif (self.isCancelled) {
callback(null, { status: 'cancelled' });
return;
}
opts.since = info.update_seq;
self.doChanges(opts);
}, callback);
return;
}
if (opts.continuous && opts.since !== 'now') {
this.db.info().then(function (info) {
self.startSeq = info.update_seq;
/* istanbul ignore next */
}, function (err) {
if (err.id === 'idbNull') {
// db closed before this returned thats ok
return;
}
throw err;
});
}
if (opts.filter && typeof opts.filter === 'string') {
if (opts.filter === '_view') {
opts.view = (0, _normalizeDdocFunctionName2.default)(opts.view);
} else {
opts.filter = (0, _normalizeDdocFunctionName2.default)(opts.filter);
}
if (this.db.type() !== 'http' && !opts.doc_ids) {
return this.filterChanges(opts);
}
}
if (!('descending' in opts)) {
opts.descending = false;
}
// 0 and 1 should return 1 document
opts.limit = opts.limit === 0 ? 1 : opts.limit;
opts.complete = callback;
var newPromise = this.db._changes(opts);
Eif (newPromise && typeof newPromise.cancel === 'function') {
var cancel = self.cancel;
self.cancel = (0, _argsarray2.default)(function (args) {
newPromise.cancel();
cancel.apply(this, args);
});
}
};
Changes.prototype.filterChanges = function (opts) {
var self = this;
var callback = opts.complete;
if (opts.filter === '_view') {
if (!opts.view || typeof opts.view !== 'string') {
var err = (0, _errors.createError)(_errors.BAD_REQUEST, '`view` filter parameter not found or invalid.');
return callback(err);
}
// fetch a view from a design doc, make it behave like a filter
var viewName = (0, _parseDdocFunctionName2.default)(opts.view);
this.db.get('_design/' + viewName[0], function (err, ddoc) {
/* istanbul ignore if */
Iif (self.isCancelled) {
return callback(null, { status: 'cancelled' });
}
/* istanbul ignore next */
Iif (err) {
return callback((0, _errors.generateErrorFromResponse)(err));
}
var mapFun = ddoc && ddoc.views && ddoc.views[viewName[1]] && ddoc.views[viewName[1]].map;
if (!mapFun) {
return callback((0, _errors.createError)(_errors.MISSING_DOC, ddoc.views ? 'missing json key: ' + viewName[1] : 'missing json key: views'));
}
opts.filter = (0, _evalView2.default)(mapFun);
self.doChanges(opts);
});
} else {
// fetch a filter from a design doc
var filterName = (0, _parseDdocFunctionName2.default)(opts.filter);
if (!filterName) {
return self.doChanges(opts);
}
this.db.get('_design/' + filterName[0], function (err, ddoc) {
/* istanbul ignore if */
Iif (self.isCancelled) {
return callback(null, { status: 'cancelled' });
}
/* istanbul ignore next */
if (err) {
return callback((0, _errors.generateErrorFromResponse)(err));
}
var filterFun = ddoc && ddoc.filters && ddoc.filters[filterName[1]];
if (!filterFun) {
return callback((0, _errors.createError)(_errors.MISSING_DOC, ddoc && ddoc.filters ? 'missing json key: ' + filterName[1] : 'missing json key: filters'));
}
opts.filter = (0, _evalFilter2.default)(filterFun);
self.doChanges(opts);
});
}
};
exports.default = Changes;
module.exports = exports['default']; |