simpleasync - npm Package Compare versions

Comparing version 0.0.1-alpha to 0.0.1

lib/simpleasync.js

@@ -1,1 +0,28 @@
-
function Sequence() {
}

function createSequence() {
    return new Sequence();
}

module.exports = createSequence;
+
function Runner(fns, elsefn) {
    var k = 0;            
    var l = fns.length;
    
    var data = null;
    
    this.run = function (initialdata) {
        data = initialdata;
        doStep();
    }

    function doStep() {
        if (k >= l)
            return;
            
        var fn = fns[k++];
        
        try {
            if (fn.length > 1) {
                fn(data, function (err, newdata) {
                    if (err) {
                        elsefn(err);
                        return;
                    }
                    
                    data = newdata;
                    setImmediate(doStep);
                });
            }
            else {               
                data = fn(data);
                setImmediate(doStep);
            }
        }
        catch (err) {
            elsefn(err);
            return;
        }
    }
}
+function Sequence() {
+    var fns = [];
+    
+    var elsefn = function (err) {
        throw err;
+    }
+    
+    this.then = function (fn) {
+        fns.push(fn);
+        return this;
+    }
+    
+    this.else = function (fn) {
+        elsefn = fn;
+        return this;
+    }
+    
+    this.run = function (data) {
        var runner = new Runner(fns, elsefn);
        
        setImmediate(runner.run(data));
+        
+        return this;
+    }
+}
+
+function createSequence() {
+    return new Sequence();
+}
+
+module.exports = createSequence;

package.json

 { "name": "simpleasync"
 , "description": "Simple flow library to chain and run functions with asynchronous calls"
 , "keywords": [ "node", "asynchronous", "library" ]
-, "version": "0.0.1alpha"
+, "version": "0.0.1"
 , "author": "Angel 'Java' Lopez <[e-mail]> (http://www.ajlopez.com)"
@@ -6,0 +6,0 @@ , "repository": { "type": "git", "url": "git://github.com/ajlopez/SimpleAsync.git" }

README.md

@@ -20,4 +20,79 @@ # SimpleAsync
 ```
-[TBD] (see tests).
 
+Define and run steps with then:
+```js
+async()
+    .then(function (data) {
+        console.log(data);
+        return data + 1;
+    })
+    .then(function (data) {
+        console.log(data);
+    })
+    .run(10);
+```
+
+Expected output
+```
+10
+11
+```
+
+Define and run steps with one step using a callback. Then, you can write async steps:
+```js
+async()
+    .then(function (data, next) {
+        console.log(data);
+        next(null, data + 1); // callback(err, newdata);
+    })
+    .then(function (data) {
+        console.log(data);
+    })
+    .run(10);
+```
+
+Expected output
+```
+10
+11
+```
+
+Use else for catch errors:
+```js
+async()
+    .then(function (data) {
+        console.log(data);
+        throw "Houston, we have a problem";
+    })
+    .else(function (err) {
+        console.log('error:', err);
+    })
+    .run(10);
+```
+
+Expected output
+```
+10
+error: Houston, we have a problem
+```
+
+Raise an error in an step with callback
+```js
+async()
+    .then(function (data, next) {
+        console.log(data);
+        next("Houston, we have a problem", null);
+    })
+    .else(function (err) {
+        console.log('error:', err);
+    })
+    .run(10);
+```
+
+Expected output
+```
+10
+error: Houston, we have a problem
+```
+
 ## Development
@@ -24,0 +99,0 @@

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Improved metrics

Total package byte prevSize

8731

increased by212.16%

Number of package files

11

increased by120%

Lines of code

145

increased by3525%

Number of lines in readme file

128

increased by141.51%

Number of medium supply chain risk alerts

0

decreased by-100%

No dependency changes