1 files changed, 119 insertions, 0 deletions
diff --git a/node_modules/rxjs/dist/esm/internal/Subscription.js b/node_modules/rxjs/dist/esm/internal/Subscription.js
new file mode 100644
index 0000000..69835fb
--- /dev/null
+++ b/node_modules/rxjs/dist/esm/internal/Subscription.js
@@ -0,0 +1,119 @@
+import { isFunction } from './util/isFunction';
+import { UnsubscriptionError } from './util/UnsubscriptionError';
+import { arrRemove } from './util/arrRemove';
+export class Subscription {
+    constructor(initialTeardown) {
+        this.initialTeardown = initialTeardown;
+        this.closed = false;
+        this._parentage = null;
+        this._finalizers = null;
+    }
+    unsubscribe() {
+        let errors;
+        if (!this.closed) {
+            this.closed = true;
+            const { _parentage } = this;
+            if (_parentage) {
+                this._parentage = null;
+                if (Array.isArray(_parentage)) {
+                    for (const parent of _parentage) {
+                        parent.remove(this);
+                    }
+                }
+                else {
+                    _parentage.remove(this);
+                }
+            }
+            const { initialTeardown: initialFinalizer } = this;
+            if (isFunction(initialFinalizer)) {
+                try {
+                    initialFinalizer();
+                }
+                catch (e) {
+                    errors = e instanceof UnsubscriptionError ? e.errors : [e];
+                }
+            }
+            const { _finalizers } = this;
+            if (_finalizers) {
+                this._finalizers = null;
+                for (const finalizer of _finalizers) {
+                    try {
+                        execFinalizer(finalizer);
+                    }
+                    catch (err) {
+                        errors = errors !== null && errors !== void 0 ? errors : [];
+                        if (err instanceof UnsubscriptionError) {
+                            errors = [...errors, ...err.errors];
+                        }
+                        else {
+                            errors.push(err);
+                        }
+                    }
+                }
+            }
+            if (errors) {
+                throw new UnsubscriptionError(errors);
+            }
+        }
+    }
+    add(teardown) {
+        var _a;
+        if (teardown && teardown !== this) {
+            if (this.closed) {
+                execFinalizer(teardown);
+            }
+            else {
+                if (teardown instanceof Subscription) {
+                    if (teardown.closed || teardown._hasParent(this)) {
+                        return;
+                    }
+                    teardown._addParent(this);
+                }
+                (this._finalizers = (_a = this._finalizers) !== null && _a !== void 0 ? _a : []).push(teardown);
+            }
+        }
+    }
+    _hasParent(parent) {
+        const { _parentage } = this;
+        return _parentage === parent || (Array.isArray(_parentage) && _parentage.includes(parent));
+    }
+    _addParent(parent) {
+        const { _parentage } = this;
+        this._parentage = Array.isArray(_parentage) ? (_parentage.push(parent), _parentage) : _parentage ? [_parentage, parent] : parent;
+    }
+    _removeParent(parent) {
+        const { _parentage } = this;
+        if (_parentage === parent) {
+            this._parentage = null;
+        }
+        else if (Array.isArray(_parentage)) {
+            arrRemove(_parentage, parent);
+        }
+    }
+    remove(teardown) {
+        const { _finalizers } = this;
+        _finalizers && arrRemove(_finalizers, teardown);
+        if (teardown instanceof Subscription) {
+            teardown._removeParent(this);
+        }
+    }
+}
+Subscription.EMPTY = (() => {
+    const empty = new Subscription();
+    empty.closed = true;
+    return empty;
+})();
+export const EMPTY_SUBSCRIPTION = Subscription.EMPTY;
+export function isSubscription(value) {
+    return (value instanceof Subscription ||
+        (value && 'closed' in value && isFunction(value.remove) && isFunction(value.add) && isFunction(value.unsubscribe)));
+}
+function execFinalizer(finalizer) {
+    if (isFunction(finalizer)) {
+        finalizer();
+    }
+    else {
+        finalizer.unsubscribe();
+    }
+}
+//# sourceMappingURL=Subscription.js.map
+\ No newline at end of file