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unsafe-function.html
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<!--
Edited by Awear Solutions Ltd, 2017.
Copyright 2013, 2016 IBM Corp.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<script type="text/x-red" data-template-name="unsafe-function">
<div class="form-row">
<label for="node-input-name"><i class="fa fa-tag"></i> <span>Name</span></label>
<input type="text" id="node-input-name" placeholder="Name" />
</div>
<div class="form-row" style="margin-bottom: 0px;">
<label for="node-input-func"><i class="fa fa-wrench"></i> <span>Function</span></label>
<input type="hidden" id="node-input-func" autofocus="autofocus">
<input type="hidden" id="node-input-noerr">
</div>
<div class="form-row node-text-editor-row" style="position:relative">
<div style="position: absolute; right:0; bottom:calc(100% + 3px);"><button id="node-function-expand-js" class="editor-button editor-button-small"><i class="fa fa-expand"></i></button></div>
<div style="height: 250px; min-height:150px;" class="node-text-editor" id="node-input-func-editor" ></div>
</div>
<div class="form-row">
<label for="node-input-outputs"><i class="fa fa-random"></i> <span>Outputs</span></label>
<input id="node-input-outputs" style="width: 60px;" value="1">
</div>
<div class="form-tips"><span>See the Info tab for help writing functions.</span></div>
</script>
<script type="text/x-red" data-help-name="unsafe-function">
<p>A JavaScript function block to run against the messages being received by the node.</p>
<p>The messages are passed in as a JavaScript object called <code>msg</code>.</p>
<p>By convention it will have a <code>msg.payload</code> property containing
the body of the message.</p>
<p>The function is expected to return a message object (or multiple message objects), but can choose
to return nothing in order to halt a flow.</p>
<h3>Details</h3>
<p>See the <a target="_blank" href="http://nodered.org/docs/writing-functions.html">online documentation</a>
for more information on writing functions.</p>
<h4>Sending messages</h4>
<p>The function can either return the messages it wants to pass on to the next nodes
in the flow, or can call <code>node.send(messages)</code>.</p>
<p>It can return/send:</p>
<ul>
<li>a single message object - passed to nodes connected to the first output</li>
<li>an array of message objects - passed to nodes connected to the corresponding outputs</li>
</ul>
<p>If any element of the array is itself an array of messages, multiple
messages are sent to the corresponding output.</p>
<p>If null is returned, either by itself or as an element of the array, no
message is passed on.</p>
<h4>Logging and Error Handling</h4>
<p>To log any information, or report an error, the following functions are available:</p>
<ul>
<li><code>node.log("Log message")</code></li>
<li><code>node.warn("Warning")</code></li>
<li><code>node.error("Error")</code></li>
</ul>
</p>
<p>The Catch node can also be used to handle errors. To invoke a Catch node,
pass <code>msg</code> as a second argument to <code>node.error</code>:</p>
<pre>node.error("Error",msg);</pre>
<h4>Accessing Node Information</h4>
<p>In the function block, id and name of the node can be referenced using the following properties:</p>
<ul>
<li><code>node.id</code> - id of the node</li>
<li><code>node.name</code> - name of the node</li>
</ul>
<!--
<h4>Using environment variables</h4>
<p>Environment variables can be accessed using <code>env.get("MY_ENV_VAR")</code>.</p>
-->
</script>
<script type="text/javascript">
RED.nodes.registerType('unsafe-function',{
color:"#FFA682",
category: 'function',
defaults: {
name: {value:""},
func: {value:"\nreturn msg;"},
outputs: {value:1},
noerr: {value:0,required:true,validate:function(v){ return ((!v) || (v === 0)) ? true : false; }}
},
inputs:1,
outputs:1,
icon: "function.png",
label: function() {
return this.name;
},
labelStyle: function() {
return this.name?"node_label_italic":"";
},
oneditprepare: function() {
var that = this;
$( "#node-input-outputs" ).spinner({
min:1,
change: function(event, ui) {
var value = this.value;
if (!value.match(/^\d+$/)) { value = 1; }
else if (value < this.min) { value = this.min; }
if (value !== this.value) { $(this).spinner("value", value); }
}
});
this.editor = RED.editor.createEditor({
id: 'node-input-func-editor',
mode: 'ace/mode/javascript',
value: $("#node-input-func").val(),
globals: {
msg:true,
context:true,
RED: true,
util: true,
flow: true,
global: true,
console: true,
Buffer: true,
setTimeout: true,
clearTimeout: true,
setInterval: true,
clearInterval: true
}
});
RED.library.create({
url:"functions", // where to get the data from
type:"function", // the type of object the library is for
editor:this.editor, // the field name the main text body goes to
mode:"ace/mode/javascript",
fields:['name','outputs']
});
this.editor.focus();
$("#node-function-expand-js").click(function(e) {
e.preventDefault();
var value = that.editor.getValue();
RED.editor.editJavaScript({
value: value,
width: "Infinity",
cursor: that.editor.getCursorPosition(),
complete: function(v,cursor) {
that.editor.setValue(v, -1);
that.editor.gotoLine(cursor.row+1,cursor.column,false);
setTimeout(function() {
that.editor.focus();
},300);
}
})
})
},
oneditsave: function() {
var annot = this.editor.getSession().getAnnotations();
this.noerr = 0;
$("#node-input-noerr").val(0);
for (var k=0; k < annot.length; k++) {
//console.log(annot[k].type,":",annot[k].text, "on line", annot[k].row);
if (annot[k].type === "error") {
$("#node-input-noerr").val(annot.length);
this.noerr = annot.length;
}
}
$("#node-input-func").val(this.editor.getValue());
this.editor.destroy();
delete this.editor;
},
oneditcancel: function() {
this.editor.destroy();
delete this.editor;
},
oneditresize: function(size) {
var rows = $("#dialog-form>div:not(.node-text-editor-row)");
var height = $("#dialog-form").height();
for (var i=0;i<rows.size();i++) {
height -= $(rows[i]).outerHeight(true);
}
var editorRow = $("#dialog-form>div.node-text-editor-row");
height -= (parseInt(editorRow.css("marginTop"))+parseInt(editorRow.css("marginBottom")));
$(".node-text-editor").css("height",height+"px");
this.editor.resize();
}
});
</script>