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node_modules/rxjs/dist/cjs/internal/operators/groupBy.js

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+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.groupBy = void 0;
+var Observable_1 = require("../Observable");
+var innerFrom_1 = require("../observable/innerFrom");
+var Subject_1 = require("../Subject");
+var lift_1 = require("../util/lift");
+var OperatorSubscriber_1 = require("./OperatorSubscriber");
+function groupBy(keySelector, elementOrOptions, duration, connector) {
+    return lift_1.operate(function (source, subscriber) {
+        var element;
+        if (!elementOrOptions || typeof elementOrOptions === 'function') {
+            element = elementOrOptions;
+        }
+        else {
+            (duration = elementOrOptions.duration, element = elementOrOptions.element, connector = elementOrOptions.connector);
+        }
+        var groups = new Map();
+        var notify = function (cb) {
+            groups.forEach(cb);
+            cb(subscriber);
+        };
+        var handleError = function (err) { return notify(function (consumer) { return consumer.error(err); }); };
+        var activeGroups = 0;
+        var teardownAttempted = false;
+        var groupBySourceSubscriber = new OperatorSubscriber_1.OperatorSubscriber(subscriber, function (value) {
+            try {
+                var key_1 = keySelector(value);
+                var group_1 = groups.get(key_1);
+                if (!group_1) {
+                    groups.set(key_1, (group_1 = connector ? connector() : new Subject_1.Subject()));
+                    var grouped = createGroupedObservable(key_1, group_1);
+                    subscriber.next(grouped);
+                    if (duration) {
+                        var durationSubscriber_1 = OperatorSubscriber_1.createOperatorSubscriber(group_1, function () {
+                            group_1.complete();
+                            durationSubscriber_1 === null || durationSubscriber_1 === void 0 ? void 0 : durationSubscriber_1.unsubscribe();
+                        }, undefined, undefined, function () { return groups.delete(key_1); });
+                        groupBySourceSubscriber.add(innerFrom_1.innerFrom(duration(grouped)).subscribe(durationSubscriber_1));
+                    }
+                }
+                group_1.next(element ? element(value) : value);
+            }
+            catch (err) {
+                handleError(err);
+            }
+        }, function () { return notify(function (consumer) { return consumer.complete(); }); }, handleError, function () { return groups.clear(); }, function () {
+            teardownAttempted = true;
+            return activeGroups === 0;
+        });
+        source.subscribe(groupBySourceSubscriber);
+        function createGroupedObservable(key, groupSubject) {
+            var result = new Observable_1.Observable(function (groupSubscriber) {
+                activeGroups++;
+                var innerSub = groupSubject.subscribe(groupSubscriber);
+                return function () {
+                    innerSub.unsubscribe();
+                    --activeGroups === 0 && teardownAttempted && groupBySourceSubscriber.unsubscribe();
+                };
+            });
+            result.key = key;
+            return result;
+        }
+    });
+}
+exports.groupBy = groupBy;
+//# sourceMappingURL=groupBy.js.map