- Start support for auto-generated routes using UniversalPath

- Start support for custom view engine props & functions
- Start login template and namespace

src/util/support/Pipe.ts

@@ -8,6 +8,11 @@ export type PipeOperator<T, T2> = (subject: T) => T2
  */
 export type ReflexivePipeOperator<T> = (subject: T) => T
 
+/**
+ * A condition or condition-resolving function for pipe methods.
+ */
+export type PipeCondition<T> = boolean | ((subject: T) => boolean)
+
 /**
  * A class for writing chained/conditional operations in a data-flow manner.
  *
@@ -79,8 +84,8 @@ export class Pipe<T> {
      * @param check
      * @param op
      */
-    when(check: boolean, op: ReflexivePipeOperator<T>): Pipe<T> {
-        if ( check ) {
+    when(check: PipeCondition<T>, op: ReflexivePipeOperator<T>): Pipe<T> {
+        if ( (typeof check === 'function' && check(this.subject)) || check ) {
             return Pipe.wrap(op(this.subject))
         }
 
@@ -94,8 +99,12 @@ export class Pipe<T> {
      * @param check
      * @param op
      */
-    unless(check: boolean, op: ReflexivePipeOperator<T>): Pipe<T> {
-        return this.when(!check, op)
+    unless(check: PipeCondition<T>, op: ReflexivePipeOperator<T>): Pipe<T> {
+        if ( (typeof check === 'function' && check(this.subject)) || check ) {
+            return this
+        }
+
+        return Pipe.wrap(op(this.subject))
     }
 
     /**
@@ -103,7 +112,7 @@ export class Pipe<T> {
      * @param check
      * @param op
      */
-    whenNot(check: boolean, op: ReflexivePipeOperator<T>): Pipe<T> {
+    whenNot(check: PipeCondition<T>, op: ReflexivePipeOperator<T>): Pipe<T> {
         return this.unless(check, op)
     }