6.0.13

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@push.rocks/lik",
-  "version": "6.0.6",
+  "version": "6.0.13",
   "private": false,
   "description": "light little helpers for node",
   "main": "dist_ts/index.js",

pnpm-lock.yaml

@@ -1846,7 +1846,7 @@ packages:
       '@web/parse5-utils': 2.1.0
       chokidar: 3.5.3
       clone: 2.1.2
-      es-module-lexer: 1.3.1
+      es-module-lexer: 1.4.1
       get-stream: 6.0.1
       is-stream: 2.0.1
       isbinaryfile: 5.0.0
@@ -2891,6 +2891,10 @@ packages:
     resolution: {integrity: sha512-JUFAyicQV9mXc3YRxPnDlrfBKpqt6hUYzz9/boprUJHs4e4KVr3XwOF70doO6gwXUor6EWZJAyWAfKki84t20Q==}
     dev: true
 
+  /es-module-lexer@1.4.1:
+    resolution: {integrity: sha512-cXLGjP0c4T3flZJKQSuziYoq7MlT+rnvfZjfp7h+I7K9BNX54kP9nyWvdbwjQ4u1iWbOL4u96fgeZLToQlZC7w==}
+    dev: true
+
   /es-set-tostringtag@2.0.2:
     resolution: {integrity: sha512-BuDyupZt65P9D2D2vA/zqcI3G5xRsklm5N3xCwuiy+/vKy8i0ifdsQP1sLgO4tZDSCaQUSnmC48khknGMV3D2Q==}
     engines: {node: '>= 0.4'}

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/lik',
-  version: '6.0.6',
+  version: '6.0.13',
   description: 'light little helpers for node'
 }

ts/backpressuredarray.ts

@@ -0,0 +1,62 @@
+import * as plugins from './lik.plugins.js';
+
+export class BackpressuredArray<T> {
+  public data: T[];
+  private highWaterMark: number;
+  public hasSpace = new plugins.smartrx.rxjs.Subject<'hasSpace'>();
+  private itemsAvailable = new plugins.smartrx.rxjs.Subject<'itemsAvailable'>();
+
+  constructor(highWaterMark: number = 16) {
+    this.data = [];
+    this.highWaterMark = highWaterMark;
+  }
+
+  push(item: T): boolean {
+    this.data.push(item);
+    this.itemsAvailable.next('itemsAvailable');
+    
+    const spaceAvailable = this.checkSpaceAvailable();
+    if (spaceAvailable) {
+      this.hasSpace.next('hasSpace');
+    }
+    return spaceAvailable;
+  }
+
+  shift(): T | undefined {
+    const item = this.data.shift();
+    if (this.checkSpaceAvailable()) {
+      this.hasSpace.next('hasSpace');
+    }
+    return item;
+  }
+
+  checkSpaceAvailable(): boolean {
+    return this.data.length < this.highWaterMark;
+  }
+
+  waitForSpace(): Promise<void> {
+    return new Promise<void>((resolve) => {
+      if (this.checkSpaceAvailable()) {
+        resolve();
+      } else {
+        const subscription = this.hasSpace.subscribe(() => {
+          subscription.unsubscribe();
+          resolve();
+        });
+      }
+    });
+  }
+
+  waitForItems(): Promise<void> {
+    return new Promise<void>((resolve) => {
+      if (this.data.length > 0) {
+        resolve();
+      } else {
+        const subscription = this.itemsAvailable.subscribe(() => {
+          subscription.unsubscribe();
+          resolve();
+        });
+      }
+    });
+  }
+}

ts/index.ts

@@ -1,4 +1,5 @@
 export * from './lik.asyncexecutionstack.js';
+export * from './backpressuredarray.js';
 export * from './lik.fastmap.js';
 export * from './lik.interestmap.js';
 export * from './lik.interestmap.interest.js';