Added pipeline helper, with tests

Can write with | and |> to use this function.

mustache.js

@@ -49,7 +49,7 @@
    * Safe way of detecting whether or not the given thing is a primitive and
    * whether it has the given property
    */
-  function primitiveHasOwnProperty (primitive, propName) {  
+  function primitiveHasOwnProperty (primitive, propName) {
     return (
       primitive != null
       && typeof primitive !== 'object'
@@ -92,6 +92,7 @@
   var equalsRe = /\s*=/;
   var curlyRe = /\s*\}/;
   var tagRe = /#|\^|\/|>|\{|&|=|!/;
+  var pipelineRe = /\|\>?/;
 
   /**
    * Breaks up the given `template` string into a tree of tokens. If the `tags`
@@ -379,14 +380,37 @@
     return new Context(view, this);
   };
 
+  Context.prototype.resolvePipelineOperator = function resolvePipelineOperator(value, pipelines){
+    var self = this;
+    return pipelines.reduce(function(val, func){
+      if(self.view.hasOwnProperty(func)){
+        return self.view[func](val);
+      }else if(self.parent && self.parent.view.hasOwnProperty(func)){
+        return self.parent.view[func](val);
+      }else{
+        return value;
+      }
+    }
+    ,value);
+  }
+
   /**
    * Returns the value of the given name in this context, traversing
    * up the context hierarchy if the value is absent in this context's view.
    */
   Context.prototype.lookup = function lookup (name) {
-    var cache = this.cache;
+    // {{variable | pipelineOne |> pipelineTwo}}
+    // output: [variable,pipelineOne, pipelineTwo ]
+    // Can use | or |>.
+    var replacedName = name
+      .replace(new RegExp(spaceRe, "g"),'')
+      .split(pipelineRe)
 
-    var value;
+    pipelines = replacedName.slice(1);
+    name = replacedName[0];
+
+    var cache = this.cache;
+    var value
     if (cache.hasOwnProperty(name)) {
       value = cache[name];
     } else {
@@ -418,7 +442,7 @@
           while (intermediateValue != null && index < names.length) {
             if (index === names.length - 1)
               lookupHit = (
-                hasProperty(intermediateValue, names[index]) 
+                hasProperty(intermediateValue, names[index])
                 || primitiveHasOwnProperty(intermediateValue, names[index])
               );
 
@@ -460,9 +484,14 @@
       cache[name] = value;
     }
 
+
     if (isFunction(value))
       value = value.call(this.view);
 
+    if(pipelines){
+      value = this.resolvePipelineOperator(value, pipelines);
+    }
+
     return value;
   };
 

test/_files/pipeline.js

@@ -0,0 +1,25 @@
+({
+  name: 'name',
+  job: {
+    name: 'Developer'
+  },
+  numbers:[1,2,3],
+  sumOne:(value)=>{
+    return value + 1;
+  },
+  upper:(value)=>{
+    return value.toUpperCase()
+  },
+  lower: (value)=>{
+    return value.toLowerCase()
+  },
+  firstUpper:(value) =>{
+    value = value.split('')
+    value[0] = value[0].toUpperCase()
+    value = value.join('')
+    return value;
+  },
+  setNameFuncion:(value)=>{
+    return value + ": This is a value"
+  }
+})

test/_files/pipeline.mustache

@@ -0,0 +1,50 @@
+-- Use |
+{{name | upper}}
+{{name |upper}}
+{{name| upper}}
+{{name|upper}}
+{{name|underscore}}
+{{name|underscore  }}
+{{name|lower}}
+{{name |     lower}}
+{{name             |lower}}
+{{name             |lower | upper}}
+{{name             |lower | upper | lower | upper}}
+{{name             |lower | firstUpper}}
+{{name             | upper | firstUpper}}
+{{job.name | upper}}
+{{job.name | lower | firstUpper}}
+{{#numbers}}
+{{. | sumOne}}
+{{/numbers}}
+{{#numbers}}
+{{. | sumOne | setNameFuncion}}
+{{/numbers}}
+{{#numbers}}
+{{. | sumOne | setNameFuncion | lower}}
+{{/numbers}}
+-- Use |>
+{{name |> upper}}
+{{name |>upper}}
+{{name|> upper}}
+{{name|>upper}}
+{{name|>underscore}}
+{{name|>underscore  }}
+{{name|>lower}}
+{{name |>     lower}}
+{{name             |>lower}}
+{{name             |>lower |> upper}}
+{{name             |>lower |> upper |> lower |> upper}}
+{{name             |>lower |> firstUpper}}
+{{name             |> upper |> firstUpper}}
+{{job.name |> upper}}
+{{job.name |> lower |> firstUpper}}
+{{#numbers}}
+{{. |> sumOne}}
+{{/numbers}}
+{{#numbers}}
+{{. |> sumOne |> setNameFuncion}}
+{{/numbers}}
+{{#numbers}}
+{{. |> sumOne |> setNameFuncion |> lower}}
+{{/numbers}}

test/_files/pipeline.txt

@@ -0,0 +1,50 @@
+-- Use |
+NAME
+NAME
+NAME
+NAME
+name
+name
+name
+name
+name
+NAME
+NAME
+Name
+NAME
+DEVELOPER
+Developer
+2
+3
+4
+2: This is a value
+3: This is a value
+4: This is a value
+2: this is a value
+3: this is a value
+4: this is a value
+-- Use |>
+NAME
+NAME
+NAME
+NAME
+name
+name
+name
+name
+name
+NAME
+NAME
+Name
+NAME
+DEVELOPER
+Developer
+2
+3
+4
+2: This is a value
+3: This is a value
+4: This is a value
+2: this is a value
+3: this is a value
+4: this is a value