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node_modules/rxjs/_esm5/Notification.js

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+/** PURE_IMPORTS_START ._Observable PURE_IMPORTS_END */
+import { Observable } from './Observable';
+/**
+ * Represents a push-based event or value that an {@link Observable} can emit.
+ * This class is particularly useful for operators that manage notifications,
+ * like {@link materialize}, {@link dematerialize}, {@link observeOn}, and
+ * others. Besides wrapping the actual delivered value, it also annotates it
+ * with metadata of, for instance, what type of push message it is (`next`,
+ * `error`, or `complete`).
+ *
+ * @see {@link materialize}
+ * @see {@link dematerialize}
+ * @see {@link observeOn}
+ *
+ * @class Notification<T>
+ */
+export var Notification = /*@__PURE__*/ (/*@__PURE__*/ function () {
+    function Notification(kind, value, error) {
+        this.kind = kind;
+        this.value = value;
+        this.error = error;
+        this.hasValue = kind === 'N';
+    }
+    /**
+     * Delivers to the given `observer` the value wrapped by this Notification.
+     * @param {Observer} observer
+     * @return
+     */
+    Notification.prototype.observe = function (observer) {
+        switch (this.kind) {
+            case 'N':
+                return observer.next && observer.next(this.value);
+            case 'E':
+                return observer.error && observer.error(this.error);
+            case 'C':
+                return observer.complete && observer.complete();
+        }
+    };
+    /**
+     * Given some {@link Observer} callbacks, deliver the value represented by the
+     * current Notification to the correctly corresponding callback.
+     * @param {function(value: T): void} next An Observer `next` callback.
+     * @param {function(err: any): void} [error] An Observer `error` callback.
+     * @param {function(): void} [complete] An Observer `complete` callback.
+     * @return {any}
+     */
+    Notification.prototype.do = function (next, error, complete) {
+        var kind = this.kind;
+        switch (kind) {
+            case 'N':
+                return next && next(this.value);
+            case 'E':
+                return error && error(this.error);
+            case 'C':
+                return complete && complete();
+        }
+    };
+    /**
+     * Takes an Observer or its individual callback functions, and calls `observe`
+     * or `do` methods accordingly.
+     * @param {Observer|function(value: T): void} nextOrObserver An Observer or
+     * the `next` callback.
+     * @param {function(err: any): void} [error] An Observer `error` callback.
+     * @param {function(): void} [complete] An Observer `complete` callback.
+     * @return {any}
+     */
+    Notification.prototype.accept = function (nextOrObserver, error, complete) {
+        if (nextOrObserver && typeof nextOrObserver.next === 'function') {
+            return this.observe(nextOrObserver);
+        }
+        else {
+            return this.do(nextOrObserver, error, complete);
+        }
+    };
+    /**
+     * Returns a simple Observable that just delivers the notification represented
+     * by this Notification instance.
+     * @return {any}
+     */
+    Notification.prototype.toObservable = function () {
+        var kind = this.kind;
+        switch (kind) {
+            case 'N':
+                return Observable.of(this.value);
+            case 'E':
+                return Observable.throw(this.error);
+            case 'C':
+                return Observable.empty();
+        }
+        throw new Error('unexpected notification kind value');
+    };
+    /**
+     * A shortcut to create a Notification instance of the type `next` from a
+     * given value.
+     * @param {T} value The `next` value.
+     * @return {Notification<T>} The "next" Notification representing the
+     * argument.
+     */
+    Notification.createNext = function (value) {
+        if (typeof value !== 'undefined') {
+            return new Notification('N', value);
+        }
+        return Notification.undefinedValueNotification;
+    };
+    /**
+     * A shortcut to create a Notification instance of the type `error` from a
+     * given error.
+     * @param {any} [err] The `error` error.
+     * @return {Notification<T>} The "error" Notification representing the
+     * argument.
+     */
+    Notification.createError = function (err) {
+        return new Notification('E', undefined, err);
+    };
+    /**
+     * A shortcut to create a Notification instance of the type `complete`.
+     * @return {Notification<any>} The valueless "complete" Notification.
+     */
+    Notification.createComplete = function () {
+        return Notification.completeNotification;
+    };
+    Notification.completeNotification = new Notification('C');
+    Notification.undefinedValueNotification = new Notification('N', undefined);
+    return Notification;
+}());
+//# sourceMappingURL=Notification.js.map