3.0.28

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@push.rocks/smartstream",
-  "version": "3.0.16",
+  "version": "3.0.28",
   "private": false,
   "description": "simplifies access to node streams",
   "main": "dist_ts/index.js",
@@ -30,6 +30,7 @@
     "@types/node": "^20.9.0"
   },
   "dependencies": {
+    "@push.rocks/lik": "^6.0.12",
     "@push.rocks/smartpromise": "^4.0.3",
     "@push.rocks/smartrx": "^3.0.7"
   },

pnpm-lock.yaml

@@ -5,6 +5,9 @@ settings:
   excludeLinksFromLockfile: false
 
 dependencies:
+  '@push.rocks/lik':
+    specifier: ^6.0.12
+    version: 6.0.12
   '@push.rocks/smartpromise':
     specifier: ^4.0.3
     version: 4.0.3
@@ -43,7 +46,7 @@ packages:
     dependencies:
       '@api.global/typedrequest-interfaces': 3.0.1
       '@push.rocks/isounique': 1.0.5
-      '@push.rocks/lik': 6.0.6
+      '@push.rocks/lik': 6.0.12
       '@push.rocks/smartdelay': 3.0.5
       '@push.rocks/smartpromise': 4.0.3
       '@push.rocks/webrequest': 3.0.34
@@ -55,7 +58,7 @@ packages:
       '@api.global/typedrequest': 3.0.2
       '@api.global/typedrequest-interfaces': 3.0.1
       '@api.global/typedsocket': 3.0.0
-      '@push.rocks/lik': 6.0.6
+      '@push.rocks/lik': 6.0.12
       '@push.rocks/smartchok': 1.0.23
       '@push.rocks/smartdelay': 3.0.5
       '@push.rocks/smartenv': 5.0.12
@@ -573,21 +576,8 @@ packages:
     resolution: {integrity: sha512-Z0BVqZZOCif1THTbIKWMgg0wxCzt9CyBtBBqQJiZ+jJ0KlQFrQHNHrPt81/LXe/L4x0cxWsn0bpL6W5DNSvNLw==}
     dev: true
 
-  /@push.rocks/lik@6.0.5:
-    resolution: {integrity: sha512-rDSPVknpJDcY3yx4w3lNQfpRkBRuxYVIJKrkiODdH27X0z3+XU4e/iAWKySuLq6H7dAoxSHJDf6BrCO+3Y8kcw==}
-    dependencies:
-      '@push.rocks/smartdelay': 3.0.5
-      '@push.rocks/smartmatch': 2.0.0
-      '@push.rocks/smartpromise': 4.0.3
-      '@push.rocks/smartrx': 3.0.7
-      '@push.rocks/smarttime': 4.0.6
-      '@types/minimatch': 5.1.2
-      '@types/symbol-tree': 3.2.4
-      symbol-tree: 3.2.4
-    dev: true
-
-  /@push.rocks/lik@6.0.6:
-    resolution: {integrity: sha512-5NVFbtR2XsGHxNqUbjFPp91J7mCWFPUc8bVfXIY2YgzhK/I5XI7yT+QBM+Bc2IvGLxjvQPkueRfPKl1IEnegeA==}
+  /@push.rocks/lik@6.0.12:
+    resolution: {integrity: sha512-/vzlOZ26gCmXZz67LeM2hJ+aNM49Jxvf3FKxLMXHhJwffd3LcV96MYbMfKzKR/za/bh5Itf3a6UjLL5mmN6Pew==}
     dependencies:
       '@push.rocks/smartdelay': 3.0.5
       '@push.rocks/smartmatch': 2.0.0
@@ -597,7 +587,6 @@ packages:
       '@types/minimatch': 5.1.2
       '@types/symbol-tree': 3.2.5
       symbol-tree: 3.2.4
-    dev: true
 
   /@push.rocks/smartbrowser@2.0.6:
     resolution: {integrity: sha512-Ne+KCVhV/DROc1rHRRw59K6h0+LpQAK9fdOUtgDZ7laLPmB/tmnbUh3IuRDNcIY1iVA9pydoobwjnTjVgio9eQ==}
@@ -636,7 +625,7 @@ packages:
   /@push.rocks/smartcli@4.0.8:
     resolution: {integrity: sha512-B4F3nqq7ko8tev1wxGdFnh/zSDDP8Q9LpEOb3wTf0jayyhYetFQ7n6zi4J9fhXYBKPkJSyQEBoOfRmgJyeLHkA==}
     dependencies:
-      '@push.rocks/lik': 6.0.5
+      '@push.rocks/lik': 6.0.12
       '@push.rocks/smartlog': 3.0.3
       '@push.rocks/smartparam': 1.1.10
       '@push.rocks/smartpromise': 4.0.3
@@ -648,7 +637,6 @@ packages:
     resolution: {integrity: sha512-mUuI7kj2f7ztjpic96FvRIlf2RsKBa5arw81AHNsndbxO6asRcxuWL8dTVxouEIK8YsBUlj0AsrCkHhMbLQdHw==}
     dependencies:
       '@push.rocks/smartpromise': 4.0.3
-    dev: true
 
   /@push.rocks/smartenv@5.0.10:
     resolution: {integrity: sha512-yJURKoz5awTPyN+5MO1A9maf5+Zh2qutHlbZPx2y5P6rwGPFWThippLicqXUSs2rM49ES6RKAD48Q8w5GQkWFw==}
@@ -685,7 +673,7 @@ packages:
   /@push.rocks/smartfile@10.0.41:
     resolution: {integrity: sha512-xOOy0duI34M2qrJZggpk51EHGXmg9+mBL1Q55tNiQKXzfx89P3coY1EAZG8tvmep3qB712QEKe7T+u04t42Kjg==}
     dependencies:
-      '@push.rocks/lik': 6.0.5
+      '@push.rocks/lik': 6.0.12
       '@push.rocks/smartdelay': 3.0.5
       '@push.rocks/smartfile-interfaces': 1.0.7
       '@push.rocks/smarthash': 3.0.4
@@ -706,7 +694,7 @@ packages:
   /@push.rocks/smartfile@11.0.0:
     resolution: {integrity: sha512-S2JyuRiBu6tocKGTbdLgz0NcGuJ2fP7mD+NHryqdnvXzIwapE1jZ1XAF8/xiLuB9rmIs7agKFm+2Jj3/PtfIWw==}
     dependencies:
-      '@push.rocks/lik': 6.0.6
+      '@push.rocks/lik': 6.0.12
       '@push.rocks/smartdelay': 3.0.5
       '@push.rocks/smartfile-interfaces': 1.0.7
       '@push.rocks/smarthash': 3.0.4
@@ -778,7 +766,6 @@ packages:
     resolution: {integrity: sha512-MBzP++1yNIBeox71X6VxpIgZ8m4bXnJpZJ4nWVH6IWpmO38MXTu4X0QF8tQnyT4LFcwvc9iiWaD15cstHa7Mmw==}
     dependencies:
       matcher: 5.0.0
-    dev: true
 
   /@push.rocks/smartmime@1.0.6:
     resolution: {integrity: sha512-PHd+I4UcsnOATNg8wjDsSAmmJ4CwQFrQCNzd0HSJMs4ZpiK3Ya91almd6GLpDPU370U4HFh4FaPF4eEAI6vkJQ==}
@@ -909,7 +896,7 @@ packages:
       '@api.global/typedserver': 3.0.9
       '@push.rocks/isohash': 2.0.1
       '@push.rocks/isounique': 1.0.5
-      '@push.rocks/lik': 6.0.6
+      '@push.rocks/lik': 6.0.12
       '@push.rocks/smartdelay': 3.0.5
       '@push.rocks/smartenv': 5.0.12
       '@push.rocks/smartjson': 5.0.10
@@ -973,14 +960,13 @@ packages:
   /@push.rocks/smarttime@4.0.6:
     resolution: {integrity: sha512-1whOow0YJw/TbN758TedRRxApoZbsvyxCVpoGjXh7DE/fEEgs7RCr4vVF5jYpyXNQuNMLpKJcTsSfyQ6RvH4Aw==}
     dependencies:
-      '@push.rocks/lik': 6.0.5
+      '@push.rocks/lik': 6.0.12
       '@push.rocks/smartdelay': 3.0.5
       '@push.rocks/smartpromise': 4.0.3
       croner: 7.0.4
       dayjs: 1.11.10
       is-nan: 1.3.2
       pretty-ms: 8.0.0
-    dev: true
 
   /@push.rocks/smartunique@3.0.6:
     resolution: {integrity: sha512-/fvh5BBHiTvZcCH4km2Oh3f0spfcWKr7e0Dp6lAb3rJq+5KiO7fQmI1UcQ9clADUaaJOn8sPzseiLt+kJ2tajw==}
@@ -1037,7 +1023,7 @@ packages:
     resolution: {integrity: sha512-w5Q3g1TT5SDIXukAAoYVuWud+Y5ysS8qiBqPU00/re895VVZhUOSNJMNU6jyneZigmbWtwSLsxDkZHlsHWpfuA==}
     dependencies:
       '@apiglobal/typedrequest-interfaces': 2.0.1
-      '@push.rocks/lik': 6.0.6
+      '@push.rocks/lik': 6.0.12
       '@push.rocks/smartenv': 5.0.12
       '@push.rocks/smartjson': 5.0.10
       '@push.rocks/smartpromise': 4.0.3
@@ -1664,7 +1650,6 @@ packages:
 
   /@types/minimatch@5.1.2:
     resolution: {integrity: sha512-K0VQKziLUWkVKiRVrx4a40iPaxTUefQmjtkQofBkYRcoaaL/8rhwDWww9qWbrgicNOgnpIsMxyNIUM4+n6dUIA==}
-    dev: true
 
   /@types/mocha@5.2.7:
     resolution: {integrity: sha512-NYrtPht0wGzhwe9+/idPaBB+TqkY9AhTvOLMkThm0IoEfLaiVQZwBwyJ5puCkO3AUCWrmcoePjp2mbFocKy4SQ==}
@@ -1763,13 +1748,8 @@ packages:
     resolution: {integrity: sha512-GDV68H0mBSN449sa5HEj51E0wfpVQb8xNSMzxf/PrypMFcLTMwJMOM/cgXiv71Mq5drkOQmUGvL1okOZcu6RrQ==}
     dev: true
 
-  /@types/symbol-tree@3.2.4:
-    resolution: {integrity: sha512-j9qIwMi0fGQLssA0/06i8XfqCq9eKsbTu+c9uPx1T9zWisSaFWEE2CwJccn/idKCllXUeHaMSeH/i4HQ6JKEAg==}
-    dev: true
-
   /@types/symbol-tree@3.2.5:
     resolution: {integrity: sha512-zXnnyENt1TYQcS21MkPaJCVjfcPq7p7yc5mo5JACuumXp6sly5jnlS0IokHd+xmmuCbx6V7JqkMBpswR+nZAcw==}
-    dev: true
 
   /@types/through2@2.0.40:
     resolution: {integrity: sha512-QeEwyeGxvtKjP0I/SR8pHtKMgmqotWTI8V/rNMTjbF3arWZJV/kYtbZXtwQKxUuV/oPSGkUilSspFKkTgCPTpA==}
@@ -2263,7 +2243,6 @@ packages:
       function-bind: 1.1.2
       get-intrinsic: 1.2.2
       set-function-length: 1.1.1
-    dev: true
 
   /callsites@3.1.0:
     resolution: {integrity: sha512-P8BjAsXvZS+VIDUI11hHCQEv74YT67YUi5JJFNWIqL235sBmjX4+qx9Muvls5ivyNENctx46xQLQ3aTuE7ssaQ==}
@@ -2501,7 +2480,6 @@ packages:
   /croner@7.0.4:
     resolution: {integrity: sha512-P8Zd88km8oQ0xH8Es0u75GtOnFyCNopuAhlFv5kAnbcTuXd0xNvRTgnxnJEs63FicCOsHTL7rpu4BHzY3cMq4w==}
     engines: {node: '>=6.0'}
-    dev: true
 
   /cross-fetch@3.1.5:
     resolution: {integrity: sha512-lvb1SBsI0Z7GDwmuid+mU3kWVBwTVUbe7S0H52yaaAdQOXq2YktTCZdlAcNKFzE6QtRz0snpw9bNiPeOIkkQvw==}
@@ -2529,7 +2507,6 @@ packages:
 
   /dayjs@1.11.10:
     resolution: {integrity: sha512-vjAczensTgRcqDERK0SR2XMwsF/tSvnvlv6VcF2GIhg6Sx4yOIt/irsr1RDJsKiIyBzJDpCoXiWWq28MqH2cnQ==}
-    dev: true
 
   /debounce@1.2.1:
     resolution: {integrity: sha512-XRRe6Glud4rd/ZGQfiV1ruXSfbvfJedlV9Y6zOlP+2K04vBYiJEte6stfFkCP03aMnY5tsipamumUjL14fofug==}
@@ -2617,7 +2594,6 @@ packages:
       get-intrinsic: 1.2.2
       gopd: 1.0.1
       has-property-descriptors: 1.0.1
-    dev: true
 
   /define-lazy-prop@2.0.0:
     resolution: {integrity: sha512-Ds09qNh8yw3khSjiJjiUInaGX9xlqZDY7JVryGxdxV7NPeuqQfplOpQ66yJFZut3jLa5zOwkXw1g9EI2uKh4Og==}
@@ -2631,7 +2607,6 @@ packages:
       define-data-property: 1.1.1
       has-property-descriptors: 1.0.1
       object-keys: 1.1.1
-    dev: true
 
   /delayed-stream@1.0.0:
     resolution: {integrity: sha1-3zrhmayt+31ECqrgsp4icrJOxhk=}
@@ -2904,7 +2879,6 @@ packages:
   /escape-string-regexp@5.0.0:
     resolution: {integrity: sha512-/veY75JbMK4j1yjvuUxuVsiS/hr/4iHs9FTT6cgTexxdE0Ly/glccBAkloH/DofkjRbZU3bnoj38mOmhkZ0lHw==}
     engines: {node: '>=12'}
-    dev: true
 
   /esm@3.2.25:
     resolution: {integrity: sha512-U1suiZ2oDVWv4zPO56S0NcR5QriEahGtdN2OR6FiOG4WJvcjBVFB0qI4+eKoWFH483PKGuLuu6V8Z4T5g63UVA==}
@@ -3164,7 +3138,6 @@ packages:
 
   /function-bind@1.1.2:
     resolution: {integrity: sha512-7XHNxH7qX9xG5mIwxkhumTox/MIRNcOgDrxWsMt2pAr23WHp6MrRlN7FBSFpCpr+oVO0F744iUgR82nJMfG2SA==}
-    dev: true
 
   /function.prototype.name@1.1.6:
     resolution: {integrity: sha512-Z5kx79swU5P27WEayXM1tBi5Ze/lbIyiNgU3qyXUOf9b2rgXYyF9Dy9Cx+IQv/Lc8WCG6L82zwUPpSS9hGehIg==}
@@ -3196,7 +3169,6 @@ packages:
       has-proto: 1.0.1
       has-symbols: 1.0.3
       hasown: 2.0.0
-    dev: true
 
   /get-stream@5.2.0:
     resolution: {integrity: sha512-nBF+F1rAZVCu/p7rjzgA+Yb4lfYXrpl7a6VmJrU8wF9I1CKvP/QwPNZHnOlwbTkY6dvtFIzFMSyQXbLoTQPRpA==}
@@ -3282,7 +3254,6 @@ packages:
     resolution: {integrity: sha512-d65bNlIadxvpb/A2abVdlqKqV563juRnZ1Wtk6s1sIR8uNsXR70xqIzVqxVf1eTqDunwT2MkczEeaezCKTZhwA==}
     dependencies:
       get-intrinsic: 1.2.2
-    dev: true
 
   /got@12.6.1:
     resolution: {integrity: sha512-mThBblvlAF1d4O5oqyvN+ZxLAYwIJK7bpMxgYqPD9okW0C3qm5FFn7k811QrcuEBwaogR3ngOFoCfs6mRv7teQ==}
@@ -3328,17 +3299,14 @@ packages:
     resolution: {integrity: sha512-VsX8eaIewvas0xnvinAe9bw4WfIeODpGYikiWYLH+dma0Jw6KHYqWiWfhQlgOVK8D6PvjubK5Uc4P0iIhIcNVg==}
     dependencies:
       get-intrinsic: 1.2.2
-    dev: true
 
   /has-proto@1.0.1:
     resolution: {integrity: sha512-7qE+iP+O+bgF9clE5+UoBFzE65mlBiVj3tKCrlNQ0Ogwm0BjpT/gK4SlLYDMybDh5I3TCTKnPPa0oMG7JDYrhg==}
     engines: {node: '>= 0.4'}
-    dev: true
 
   /has-symbols@1.0.3:
     resolution: {integrity: sha512-l3LCuF6MgDNwTDKkdYGEihYjt5pRPbEg46rtlmnSPlUbgmB8LOIrKJbYYFBSbnPaJexMKtiPO8hmeRjRz2Td+A==}
     engines: {node: '>= 0.4'}
-    dev: true
 
   /has-tostringtag@1.0.0:
     resolution: {integrity: sha512-kFjcSNhnlGV1kyoGk7OXKSawH5JOb/LzUc5w9B02hOTO0dfFRjbHQKvg1d6cf3HbeUmtU9VbbV3qzZ2Teh97WQ==}
@@ -3352,7 +3320,6 @@ packages:
     engines: {node: '>= 0.4'}
     dependencies:
       function-bind: 1.1.2
-    dev: true
 
   /he@1.2.0:
     resolution: {integrity: sha512-F/1DnUGPopORZi0ni+CvrCgHQ5FyEAHRLSApuYWMmrbSwoN2Mn/7k+Gl38gJnR7yyDZk6WLXwiGod1JOWNDKGw==}
@@ -3607,7 +3574,6 @@ packages:
     dependencies:
       call-bind: 1.0.5
       define-properties: 1.2.1
-    dev: true
 
   /is-negative-zero@2.0.2:
     resolution: {integrity: sha512-dqJvarLawXsFbNDeJW7zAz8ItJ9cd28YufuuFzh0G8pNHjJMnY08Dv7sYX2uF5UpQOwieAeOExEYAWWfu7ZZUA==}
@@ -4088,7 +4054,6 @@ packages:
     engines: {node: ^12.20.0 || ^14.13.1 || >=16.0.0}
     dependencies:
       escape-string-regexp: 5.0.0
-    dev: true
 
   /math-random@1.0.4:
     resolution: {integrity: sha512-rUxjysqif/BZQH2yhd5Aaq7vXMSx9NdEsQcyA07uEzIvxgI7zIr33gGsh+RU0/XjmQpCW7RsVof1vlkvQVCK5A==}
@@ -4340,7 +4305,6 @@ packages:
   /object-keys@1.1.1:
     resolution: {integrity: sha512-NuAESUOUMrlIXOfHKzD6bpPu3tYt3xvjNdRIQ+FeT0lNb4K8WR70CaDxhuNguS2XG+GjkyMwOzsN5ZktImfhLA==}
     engines: {node: '>= 0.4'}
-    dev: true
 
   /object.assign@4.1.0:
     resolution: {integrity: sha512-exHJeq6kBKj58mqGyTQ9DFvrZC/eR6OwxzoM9YRoGBqrXYonaFyGiFMuc9VZrXf7DarreEwMpurG3dd+CNyW5w==}
@@ -4472,7 +4436,6 @@ packages:
   /parse-ms@3.0.0:
     resolution: {integrity: sha512-Tpb8Z7r7XbbtBTrM9UhpkzzaMrqA2VXMT3YChzYltwV3P3pM6t8wl7TvpMnSTosz1aQAdVib7kdoys7vYOPerw==}
     engines: {node: '>=12'}
-    dev: true
 
   /parse5@6.0.1:
     resolution: {integrity: sha512-Ofn/CTFzRGTTxwpNEs9PP93gXShHcTq255nzRYSKe8AkVpZY7e1fpmTfOyoIvjP5HG7Z2ZM7VS9PPhQGW2pOpw==}
@@ -4591,7 +4554,6 @@ packages:
     engines: {node: '>=14.16'}
     dependencies:
       parse-ms: 3.0.0
-    dev: true
 
   /process-nextick-args@2.0.1:
     resolution: {integrity: sha512-3ouUOpQhtgrbOa17J7+uxOTpITYWaGP7/AhoR3+A+/1e9skrzelGi/dXzEYyvbxubEF6Wn2ypscTKiKJFFn1ag==}
@@ -4939,7 +4901,6 @@ packages:
       get-intrinsic: 1.2.2
       gopd: 1.0.1
       has-property-descriptors: 1.0.1
-    dev: true
 
   /set-function-name@2.0.1:
     resolution: {integrity: sha512-tMNCiqYVkXIZgc2Hnoy2IvC/f8ezc5koaRFkCjrpWzGpCd3qbZXPzVy9MAZzK1ch/X0jvSkojys3oqJN0qCmdA==}
@@ -5257,7 +5218,6 @@ packages:
 
   /symbol-tree@3.2.4:
     resolution: {integrity: sha512-9QNk5KwDF+Bvz+PyObkmSYjI5ksVUYtjW7AU22r2NKcfLJcXp96hkDWU3+XndOsUb+AQ9QhfzfCT2O+CNWT5Tw==}
-    dev: true
 
   /systeminformation@5.21.16:
     resolution: {integrity: sha512-WJZdc5RbmDF1VOJcS+G2oIBeNgmMTyJ8+enHe9stIyBg2XhboUTsSfN9HrFMDV+fgXwJ50kNKgD3TzodsFgB+g==}

test/test.backpressure.ts

@@ -0,0 +1,68 @@
+import { tap, expect } from '@push.rocks/tapbundle';
+import { SmartDuplex, type ISmartDuplexOptions, StreamWrapper } from '../ts/index.js';
+
+tap.test('should run backpressure test', async (toolsArg) => {
+  const done = toolsArg.defer();
+  async function testBackpressure() {
+    const stream1 = new SmartDuplex({
+      name: 'stream1',
+      objectMode: true,
+      writeFunction: async (chunk, tools) => {
+        await new Promise((resolve) => setTimeout(resolve, 10)); // Slow processing
+        console.log(`processed chunk ${chunk} in stream 1`);
+        return chunk; // Fast processing
+      },
+    });
+    const stream2 = new SmartDuplex({
+      name: 'stream2',
+      objectMode: true,
+      writeFunction: async (chunk, tools) => {
+        await new Promise((resolve) => setTimeout(resolve, 20)); // Slow processing
+        console.log(`processed chunk ${chunk} in stream 2`);
+        await tools.push(chunk);
+        // return chunk;
+      },
+    }); // This stream processes data more slowly
+    const stream3 = new SmartDuplex({
+      objectMode: true,
+      name: 'stream3',
+      writeFunction: async (chunk, tools) => {
+        await new Promise((resolve) => setTimeout(resolve, 200)); // Slow processing
+        console.log(`processed chunk ${chunk} in stream 3`);
+      },
+    });
+
+    stream1.pipe(stream2).pipe(stream3);
+
+    let backpressured = false;
+    for (let i = 0; i < 200; i++) {
+      const canContinue = stream1.write(`Chunk ${i}`, 'utf8');
+      if (!canContinue) {
+        backpressured = true;
+        console.log(`Backpressure at chunk ${i}`);
+      }
+    }
+
+    stream1.end();
+
+    stream1.on('finish', () => {
+      console.log('Stream 1 finished processing.');
+    });
+    stream2.on('finish', () => {
+      console.log('Stream 2 finished processing.');
+    });
+    stream3.on('finish', () => {
+      console.log('Stream 3 finished processing.');
+      if (!backpressured) {
+        throw new Error('No backpressure was observed.');
+      } else {
+        done.resolve();
+      }
+    });
+  }
+
+  testBackpressure();
+  await done.promise;
+});
+
+await tap.start();

test/test.smartstream.ts

@@ -5,9 +5,7 @@ import * as fs from 'fs';
 
 tap.test('should create a SmartStream from a Buffer', async () => {
   const bufferData = Buffer.from('This is a test buffer');
-  const smartStream = SmartDuplex.fromBuffer(bufferData, {
-    handleBackpressure: false,
-  });
+  const smartStream = SmartDuplex.fromBuffer(bufferData, {});
   
   let receivedData = Buffer.alloc(0);
   
@@ -23,26 +21,4 @@ tap.test('should create a SmartStream from a Buffer', async () => {
   });
 });
 
-tap.test('should create a SmartStream from an Observable', async () => {
-  const observableData = 'Observable test data';
-  const testObservable = smartrx.rxjs.of(Buffer.from(observableData));
-  
-  const smartStream = SmartDuplex.fromObservable(testObservable, {
-    handleBackpressure: false,
-  });
-  
-  let receivedData = Buffer.alloc(0);
-
-  return new Promise<void>((resolve) => {
-    smartStream.on('data', (chunk: Buffer) => {
-      receivedData = Buffer.concat([receivedData, chunk]);
-    });
-
-    smartStream.on('end', () => {
-      expect(receivedData.toString()).toEqual(observableData);
-      resolve();
-    });
-  });
-});
-
 tap.start();

test/test.streamfunction.ts

@@ -29,7 +29,7 @@ tap.test('should handle a read stream', async (tools) => {
       },
     })
   ]);
-  // await streamWrapper.run();
+  await streamWrapper.run();
 });
 
 tap.test('should create a valid Intake', async (tools) => {

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/smartstream',
-  version: '3.0.16',
+  version: '3.0.28',
   description: 'simplifies access to node streams'
 }

ts/index.ts

@@ -1,4 +1,3 @@
-export * from './smartstream.classes.passthrough.js';
 export * from './smartstream.classes.smartduplex.js';
 export * from './smartstream.classes.streamwrapper.js';
 export * from './smartstream.classes.streamintake.js';

ts/smartstream.classes.passthrough.ts

@@ -1,21 +0,0 @@
-import * as plugins from './smartstream.plugins.js';
-
-export class PassThrough extends plugins.stream.Duplex {
-  constructor(options?: plugins.stream.DuplexOptions) {
-    super(options);
-  }
-
-  _read(size: number): void {
-    // No-op: Data written will be automatically available for reading.
-  }
-
-  _write(chunk: any, encoding: BufferEncoding, callback: (error?: Error | null) => void): void {
-    if (this.push(chunk, encoding)) {
-      callback();
-    } else {
-      this.once('drain', () => {
-        callback();
-      });
-    }
-  }
-}

ts/smartstream.classes.smartduplex.ts

@@ -3,7 +3,7 @@ import { Duplex, type DuplexOptions } from 'stream';
 
 export interface IStreamTools {
   truncate: () => void;
-  push: (pipeObject: any) => void;
+  push: (pipeObject: any) => Promise<void>;
 }
 
 export interface IStreamWriteFunction<T, rT> {
@@ -15,7 +15,8 @@ export interface IStreamFinalFunction<rT> {
 }
 
 export interface ISmartDuplexOptions<TInput, TOutput> extends DuplexOptions {
-  handleBackpressure?: boolean;
+  debug?: boolean;
+  name?: string;
   readFunction?: () => Promise<void>;
   writeFunction?: IStreamWriteFunction<TInput, TOutput>;
   finalFunction?: IStreamFinalFunction<TOutput>;
@@ -33,158 +34,108 @@ export class SmartDuplex<TInput = any, TOutput = any> extends Duplex {
     return smartDuplex;
   }
 
-  static fromObservable(
-    observable: plugins.smartrx.rxjs.Observable<any>,
-    options?: ISmartDuplexOptions<any, any>
-  ): SmartDuplex {
-    const smartStream = new SmartDuplex(options);
-    smartStream.observableSubscription = observable.subscribe({
-      next: (data) => {
-        if (!smartStream.push(data) && smartStream.handleBackpressure) {
-          // Pause the observable if the stream buffer is full
-          smartStream.observableSubscription?.unsubscribe();
-          smartStream.once('drain', () => {
-            // Resume the observable when the stream buffer is drained
-            smartStream.observableSubscription?.unsubscribe();
-            smartStream.observableSubscription = observable.subscribe((data) => {
-              smartStream.push(data);
-            });
-          });
-        }
-      },
-      error: (err) => {
-        smartStream.emit('error', err);
-      },
-      complete: () => {
-        smartStream.push(null); // Signal the end of the data
-      },
-    });
-
-    return smartStream;
-  }
-
-  static fromReplaySubject(
-    replaySubject: plugins.smartrx.rxjs.ReplaySubject<any>,
-    options?: DuplexOptions
-  ): SmartDuplex {
-    const smartStream = new SmartDuplex(options);
-    let isBackpressured = false;
-
-    // Subscribe to the ReplaySubject
-    const subscription = replaySubject.subscribe({
-      next: (data) => {
-        const canPush = smartStream.push(data);
-        if (!canPush) {
-          // If push returns false, pause the subscription because of backpressure
-          isBackpressured = true;
-          subscription.unsubscribe();
-        }
-      },
-      error: (err) => {
-        smartStream.emit('error', err);
-      },
-      complete: () => {
-        smartStream.push(null); // End the stream when the ReplaySubject completes
-      },
-    });
-
-    // Listen for 'drain' event to resume the subscription if it was paused
-    smartStream.on('drain', () => {
-      if (isBackpressured) {
-        isBackpressured = false;
-        // Resubscribe to the ReplaySubject since we previously paused
-        smartStream.observableSubscription = replaySubject.subscribe({
-          next: (data) => {
-            if (!smartStream.push(data)) {
-              smartStream.observableSubscription?.unsubscribe();
-              isBackpressured = true;
-            }
-          },
-          // No need to repeat error and complete handling here because it's already set up above
-        });
-      }
-    });
-
-    return smartStream;
-  }
-
   // INSTANCE
-  private readFunction?: () => Promise<void>;
-  private handleBackpressure: boolean;
-  private writeFunction?: IStreamWriteFunction<TInput, TOutput>;
-  private finalFunction?: IStreamFinalFunction<TOutput>;
+  private backpressuredArray: plugins.lik.BackpressuredArray<TOutput>;
+  public options: ISmartDuplexOptions<TInput, TOutput>;
   private observableSubscription?: plugins.smartrx.rxjs.Subscription;
+  private debugLog(messageArg: string) {
+    if (this.options.debug) {
+      console.log(messageArg);
+    }
+  }
 
   constructor(optionsArg?: ISmartDuplexOptions<TInput, TOutput>) {
-    super(optionsArg);
-    this.readFunction = optionsArg?.readFunction;
-    this.writeFunction = optionsArg?.writeFunction;
-    this.finalFunction = optionsArg?.finalFunction;
-    this.handleBackpressure = optionsArg?.handleBackpressure ?? true;
+    super(Object.assign({
+      highWaterMark: 1,
+    }, optionsArg));
+    this.options = optionsArg;
+    this.backpressuredArray = new plugins.lik.BackpressuredArray<TOutput>(this.options.highWaterMark || 1)
   }
 
   public async _read(size: number): Promise<void> {
-    if (this.readFunction) {
-      await this.readFunction();
+    this.debugLog(`${this.options.name}: read was called`);
+    await this.backpressuredArray.waitForItems();
+    this.debugLog(`${this.options.name}: successfully waited for items.`);
+    if (this.options.readFunction) {
+      await this.options.readFunction();
+    }
+    let canPushMore = true; 
+    while(this.backpressuredArray.data.length > 0 && canPushMore) {
+      const nextChunk = this.backpressuredArray.shift();
+      canPushMore = this.push(nextChunk);
     }
   }
 
-  public push(chunkArg?: TOutput | null): boolean {
-    const result = super.push(chunkArg);
-    if (!result && this.handleBackpressure) {
-      this.pause();
-      // Listen for 'drain' event to resume
-      this.once('drain', () => {
-        this.resume(); // Resume the source of data
-      });
+  public async backpressuredPush (pushArg: TOutput) {
+    const canPushMore = this.backpressuredArray.push(pushArg);
+    if (!canPushMore) {
+      this.debugLog(`${this.options.name}: cannot push more`);
+      await this.backpressuredArray.waitForSpace();
+      this.debugLog(`${this.options.name}: can push more again`);
     }
-    return result;
-  }
+  };
 
+  private asyncWritePromiseObjectmap = new plugins.lik.ObjectMap<Promise<any>>();
   // Ensure the _write method types the chunk as TInput and encodes TOutput
   public async _write(chunk: TInput, encoding: string, callback: (error?: Error | null) => void) {
-    if (!this.writeFunction) {
+    if (!this.options.writeFunction) {
       return callback(new Error('No stream function provided'));
     }
 
+    let isTruncated = false;
     const tools: IStreamTools = {
       truncate: () => {
         this.push(null);
+        isTruncated = true;
         callback();
       },
-      push: (pushArg: TOutput) => this.push(pushArg),
+      push: async (pushArg: TOutput) => {
+        await this.backpressuredPush(pushArg);
+      }
     };
 
     try {
-      const modifiedChunk = await this.writeFunction(chunk, tools);
+      const writeDeferred = plugins.smartpromise.defer();
+      this.asyncWritePromiseObjectmap.add(writeDeferred.promise);
+      const modifiedChunk = await this.options.writeFunction(chunk, tools);
+      if (isTruncated) {
+        return;
+      }
       if (modifiedChunk) {
-        this.push(modifiedChunk);
+        await tools.push(modifiedChunk);
       }
       callback();
+      writeDeferred.resolve();
+      writeDeferred.promise.then(() => {
+        this.asyncWritePromiseObjectmap.remove(writeDeferred.promise);
+      });
     } catch (err) {
       callback(err);
     }
   }
 
   public async _final(callback: (error?: Error | null) => void) {
-    if (this.finalFunction) {
+    await Promise.all(this.asyncWritePromiseObjectmap.getArray());
+    if (this.options.finalFunction) {
       const tools: IStreamTools = {
         truncate: () => callback(),
-        push: (pipeObject) => this.push(pipeObject),
+        push: async (pipeObject) => {
+          this.backpressuredArray.push(pipeObject);
+        },
       };
 
       try {
-        const finalChunk = await this.finalFunction(tools);
+        const finalChunk = await this.options.finalFunction(tools);
         if (finalChunk) {
-          this.push(finalChunk);
+          this.backpressuredArray.push(finalChunk);
         }
       } catch (err) {
+        this.backpressuredArray.push(null);
         callback(err);
+        return;
       }
-    } else {
-      // nothing here
     }
-    this.push(null);
+    this.backpressuredArray.push(null);
     callback();
   }
 }

ts/smartstream.functions.ts

@@ -18,4 +18,13 @@ export function createTransformFunction<TInput, TOutput>(
   });
 
   return smartDuplexStream;
+}
+
+export const createPassThrough = () => {
+  return new SmartDuplex({
+    objectMode: true,
+    writeFunction: async (chunkArg, toolsArg) => {
+      return chunkArg;
+    }
+  })
 }

ts/smartstream.plugins.ts

@@ -4,8 +4,9 @@ import * as stream from 'stream';
 export { stream };
 
 // pushrocks scope
+import * as lik from '@push.rocks/lik';
 import * as smartpromise from '@push.rocks/smartpromise';
 import * as smartrx from '@push.rocks/smartrx';
 
-export { smartpromise, smartrx };
+export { lik, smartpromise, smartrx };