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random uuid in user maco

I want to write a Confluence user macro, which should get a unique uuid. Currently I fail to randomly generate this UUID.
The format should look like "#c199f52d-9724-4911-ad47-479e937d3b88".
I guess I can solve this, if someone shows me how I can access the java function Math.random(); from my user macro.

2 answers

1 accepted

0 votes
Answer accepted

This is how I do it. I was never able to find a good way to generate a random number or find a way to get at Math.random() but this seems to work well.

#set( $id = $action.dateFormatter.calendar.timeInMillis )

Even when the user macro is used multiple times per page I find that I get different mills. So for velocity I reference it this way ...

<div id="mydiv-$id"></div>

 and then I can target it with JavaScript this way.

var id = '$id';

var stuff = AJS.$('#' + id).html();

Thanks for your help. I will test it on occasion. For now my hash solution (see above) works fine for me.

0 votes
Bill Bailey Community Leader Mar 23, 2021

For my user macros, I don't worry about that. Confluence will generate what it needs. Even if I am wrapping an existing macro, I delete that reference. It works fine.

I want to modify the rendered results via JavaScript so I need a html object id for reference the right object on the page if a user used the macro multiple times on the same page.

Bill Bailey Community Leader Mar 23, 2021

Hmm, seems a bit hard. You could create your own ID, but you would then need to increment it each time, which complicated. And seems like a brittle solution to rely on javascript to modify an object based on ID that could change.

Is there a way to do it within the user macro so that it is dynamic?

Maybe sharing a bit more detail on what you are trying to do would help?

I have now solved this by forming a hash over all input parameters. This should be sufficient for my purposes.

@René Kray could you explain or paste your macro solution to help me get started?

I'm still looking for a solution to generate a unique ID on a page

Hi Cyrus:

If I remember correctly, I was looking for a solution for the following macro.

In the end, I used id="$paramtitle" as "unique" id. For me it was unique enough, but for a general purpose, I would suggest finding a different solution.

Regards, René


## Macro title: roadmap_panel
## Macro has a body: Y
## Body processing: Selected body processing option
## Output: Selected output option
## Developed by: René Kray
## Date created: 2021-03-23
## Installed by: René Kray
## @param title:title=Title|type=string|required=true|default=Title for this panel
## @param o1:title=O1|type=boolean|required=true|default=false
## @param o1ext:title=O1 Ext|type=string|required=false|default=
## @param o2:title=O2|type=boolean|required=true|default=false
## @param o2ext:title=O2 Ext|type=string|required=false|default=
## @param o3:title=O3|type=boolean|required=true|default=false
## @param o3ext:title=O3 Ext|type=string|required=false|default=
## @param health:title=Health|type=boolean|required=true|default=false

border: solid grey 1px;
border-radius: 5px;
background-color: #ddd;
box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.2), 0 3px 5px 0 rgba(0, 0, 0, 0.19);
div.roadmap_panel div.roadmap_panel_title{
padding: 5px 5px 5px 10px;
border-radius: 5px;
font-weight: bold;
div.roadmap_panel div.roadmap_panel_title span.button{
padding: 2px 5px 2px 5px;
float: right;
div.roadmap_panel div.roadmap_panel_title span.status{
padding: 2px 5px 2px 5px;
border-radius: 3px;
border: solid black 1px;
color: white;
font-size: 80%;
float: right;
margin-right: 5px;
div.roadmap_panel div.roadmap_panel_body{
background-color: white;
padding: 5px;
border-radius: 0 0 5px 5px;
border-top: solid #999 1px;
display: none;
<div class="roadmap_panel" id="$paramtitle">
<div onclick="roadmap_panel_show_hide('$paramtitle')" class="roadmap_panel_title">
<span class="button">+</span>
#if ($paramhealth==true)
<span class="status" style="background-color: green;">Health</span>
#if ($paramo3==true)
<span class="status" style="background-color: red;">
#if ( "$paramo3ext" != "" )
- $paramo3ext
#if ($paramo2==true)
<span class="status" style="background-color: red;">
#if ( "$paramo2ext" != "" )
- $paramo2ext
#if ($paramo1==true)
<span class="status" style="background-color: red;">
#if ( "$paramo1ext" != "" )
- $paramo1ext
<p style="margin:0">$paramtitle</p>
<div class="roadmap_panel_body">
function roadmap_panel_show_hide(id) {

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