Start routing and pipeline rewrite

src/util/collection/AsyncCollection.ts

@@ -7,7 +7,7 @@ import {
 } from './Collection'
 import {Iterable, StopIteration} from './Iterable'
 import {applyWhere, WhereOperator} from './where'
-import {AsyncPipe, Pipe} from '../support/Pipe'
+import {AsyncPipe, Pipeline} from '../support/Pipe'
 type AsyncCollectionComparable<T> = CollectionItem<T>[] | Collection<T> | AsyncCollection<T>
 type AsyncKeyFunction<T, T2> = (item: CollectionItem<T>, index: number) => CollectionItem<T2> | Promise<CollectionItem<T2>>
 type AsyncCollectionFunction<T, T2> = (items: AsyncCollection<T>) => T2
@@ -798,19 +798,16 @@ export class AsyncCollection<T> {
         return this.storedItems.range(start, end)
     }
 
-    /**
-     * Return the value of the function, passing this collection to it.
-     * @param {AsyncCollectionFunction} func
-     */
-    pipeTo<T2>(func: AsyncCollectionFunction<T, T2>): any {
-        return func(this)
-    }
-
     /**
      * Return a new Pipe of this collection.
      */
-    pipe(): Pipe<AsyncCollection<T>> {
-        return Pipe.wrap(this)
+    pipeTo<TOut>(pipeline: Pipeline<this, TOut>): TOut {
+        return pipeline.apply(this)
+    }
+
+    /** Build and apply a pipeline. */
+    pipe<TOut>(builder: (pipeline: Pipeline<this, this>) => Pipeline<this, TOut>): TOut {
+        return builder(Pipeline.id()).apply(this)
     }
 
     /**

src/util/collection/Collection.ts

@@ -1,4 +1,4 @@
-import {AsyncPipe, Pipe} from '../support/Pipe'
+import {AsyncPipe, Pipeline} from '../support/Pipe'
 
 type CollectionItem<T> = T
 type MaybeCollectionItem<T> = CollectionItem<T> | undefined
@@ -822,8 +822,13 @@ class Collection<T> {
     /**
      * Return a new Pipe of this collection.
      */
-    pipe(): Pipe<Collection<T>> {
-        return Pipe.wrap(this)
+    pipeTo<TOut>(pipeline: Pipeline<this, TOut>): TOut {
+        return pipeline.apply(this)
+    }
+
+    /** Build and apply a pipeline. */
+    pipe<TOut>(builder: (pipeline: Pipeline<this, this>) => Pipeline<this, TOut>): TOut {
+        return builder(Pipeline.id()).apply(this)
     }
 
     /**